document-end: Fix spurious "missing document end"

DocumentStartToken is preceded by DirectiveToken.

.flake8

@@ -0,0 +1,4 @@
+[flake8]
+import-order-style = pep8
+application-import-names = yamllint
+ignore = W503,W504

.github/workflows/ci.yaml

@@ -0,0 +1,61 @@
+---
+
+name: CI
+
+on:  # yamllint disable-line rule:truthy
+  push:
+  pull_request:
+    branches:
+      - master
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    name: Linters
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Python
+        uses: actions/setup-python@v4
+      - run:
+          pip install flake8 flake8-import-order sphinx rstcheck[sphinx] doc8
+      - run: pip install .
+      - run: flake8 .
+      - run: doc8 $(git ls-files '*.rst')
+      - run: rstcheck --ignore-directives automodule $(git ls-files '*.rst')
+      - run: yamllint --strict $(git ls-files '*.yaml' '*.yml')
+      - run: make -C docs html
+      - name: Check for broken links in documentation
+        run: make -C docs linkcheck
+
+  test:
+    name: Tests
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version:
+          - '3.7'
+          - '3.8'
+          - '3.9'
+          - '3.10'
+          - '3.11'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Append GitHub Actions system path
+        run: echo "$HOME/.local/bin" >> $GITHUB_PATH
+      - run: pip install coverage
+      - run: pip install .
+      # https://github.com/AndreMiras/coveralls-python-action/issues/18
+      - run: echo -e "[run]\nrelative_files = True" > .coveragerc
+      - run: coverage run -m unittest discover
+      - name: Coveralls
+        uses: AndreMiras/coveralls-python-action@develop

.travis.yml

@@ -1,28 +0,0 @@
----
-dist: xenial  # required for Python >= 3.7 (travis-ci/travis-ci#9069)
-language: python
-python:
-  - 2.7
-  - 3.5
-  - 3.6
-  - 3.7
-  - 3.8
-  - nightly
-env:
-  - REMOVE_LOCALES=false
-  - REMOVE_LOCALES=true
-install:
-  - pip install pyyaml coveralls flake8 flake8-import-order doc8
-  - if [[ $TRAVIS_PYTHON_VERSION != 2* ]]; then pip install sphinx; fi
-  - pip install .
-  - if [[ $REMOVE_LOCALES = "true" ]]; then sudo rm -rf /usr/lib/locale/*; fi
-script:
-  - if [[ $TRAVIS_PYTHON_VERSION != nightly ]]; then flake8 .; fi
-  - if [[ $TRAVIS_PYTHON_VERSION != 2* ]]; then doc8 $(git ls-files '*.rst'); fi
-  - yamllint --strict $(git ls-files '*.yaml' '*.yml')
-  - coverage run --source=yamllint -m unittest discover
-  - if [[ $TRAVIS_PYTHON_VERSION != 2* ]]; then
-      python setup.py build_sphinx;
-    fi
-after_success:
-  coveralls

CHANGELOG.rst

@@ -1,11 +1,110 @@
 Changelog
 =========
 
+1.32.0 (2023-05-22)
+-------------------
+
+- Look for configuration file in parent directories
+- Rule ``anchors``: add new option ``forbid-unused-anchors``
+
+1.31.0 (2023-04-21)
+-------------------
+
+- Build: migrate from ``setup.py`` to ``pyproject.toml``
+- Docs: update some outdated URLs
+- Rule ``colons``: prevent error when space before is mandatory
+
+1.30.0 (2023-03-22)
+-------------------
+
+- Rule ``anchors``: add new rule to detect undeclared or duplicated anchors
+- Python API: prevent using ``is_file_ignored()`` with null ``filepath``
+- Docs: fix misleading Python API example
+- Docs: fix plain text code snippet example
+- Docs: update pre-commit hook example
+
+1.29.0 (2023-01-10)
+-------------------
+
+- Add support for Python 3.11, drop support for Python 3.6
+- Rule ``float-values``: fix bug on strings containing fordidden values
+- Stop releasing universal wheels
+- Use proper Python 3 I/O type for file reading
+- Rule ``indentation``: fix ``indent-sequences`` in nested collections
+- Docs: clarify ``disable-line`` and parser errors, give a workaround
+- Refactors to apply some pyupgrade suggestions
+- Allow using a list of strings in ``ignore`` configuration
+- Add ``--list-files`` command line option
+
+1.28.0 (2022-09-12)
+-------------------
+
+- Better compress PNG image in documentation
+- Remove ``__future__`` imports specific to Python 2
+- Remove inheritance from ``object`` specific to Python 2
+- Simplify GitHub Actions example in documentation
+- Update ALE vim plugin link in documentation
+- Update license to latest version of GPLv3
+- Pre-compile disable/enable rules regexes
+- Rule ``quoted-strings``: add ``allow-quoted-quotes`` option
+- Add option ``ignore-from-file`` in config
+
+1.27.1 (2022-07-08)
+-------------------
+
+- Fix failing test on ``key-duplicates`` for old PyYAML versions
+
+1.27.0 (2022-07-08)
+-------------------
+
+- Add support for Python 3.10, drop Python 3.5
+- Fix GitHub Actions workflow
+- Refactor ``--format=auto`` logic
+- Update GitHub format output to use groups
+- Rule ``comments``: allow whitespace after the shebang marker
+- Multiple minor fixes in documentation
+- Configure Sphinx to make man page show up in apropos
+- Attempt to clarify configuration file location in documentation
+- Rule ``key-duplicates``: don't crash on redundant closing brackets or braces
+- Use ``rstcheck`` to lint documentation on the CI
+- Remove UTF-8 headers in Python files, since Python 2 isn't supported
+- Add various tests to increase coverage
+- Rule ``octal-values``: pre-compile regex for performance
+- Add sections for Visual Studio Code and IntelliJ in documentation
+- Rule ``new-lines``: add the ``type: platform`` config option
+- Add the new rule ``float-values``
+
+1.26.3 (2021-08-21)
+-------------------
+
+- Restore runtime dependency ``setuptools`` for Python < 3.8
+
+1.26.2 (2021-08-03)
+-------------------
+
+- Fix ``python_requires`` to comply with PEP 345 and PEP 440
+
+1.26.1 (2021-04-06)
+-------------------
+
+- Remove runtime dependency ``setuptools`` for Python < 3.8
+- Fix ``line_length`` to skip all hash signs starting comment
+
+1.26.0 (2021-01-29)
+-------------------
+
+- End support for Python 2 and Python 3.4, add support for Python 3.9
+- Add ``forbid: non-empty`` option to ``braces`` and ``brackets`` rules
+- Fix ``quoted-strings`` for explicit octal recognition
+- Add documentation for integration with Arcanist
+- Fix typos in changelog and README
+- Stop using deprecated ``python setup.py test`` in tests
+
 1.25.0 (2020-09-29)
 -------------------
 
 - Run tests on Travis both with and without UTF-8 locales
-- Improve documentationon with default values to rules with options
+- Improve documentation with default values to rules with options
 - Improve documentation with a Python API usage example
 - Fix documentation on ``commas`` examples
 - Packaging: move setuptools' configuration from ``setup.py`` to ``setup.cfg``

CONTRIBUTING.rst

@@ -42,5 +42,7 @@ Pull Request Process
 
 6. Write a `good commit message
    <http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html>`_.
+   If the pull request has multiple commits, each must be atomic (single
+   irreducible change that makes sense on its own).
 
 7. Then, open a pull request.

LICENSE

@@ -1,7 +1,7 @@
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -645,7 +645,7 @@ the "copyright" line and a pointer to where the full notice is found.
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
@@ -664,11 +664,11 @@ might be different; for a GUI interface, you would use an "about box".
   You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
+<https://www.gnu.org/licenses/>.
 
   The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

MANIFEST.in

@@ -1,4 +0,0 @@
-include LICENSE
-include README.rst
-include docs/*
-include tests/*.py tests/rules/*.py tests/yaml-1.2-spec-examples/*

README.rst

@@ -8,8 +8,8 @@ repetition and cosmetic problems such as lines length, trailing spaces,
 indentation, etc.
 
 .. image::
-   https://travis-ci.org/adrienverge/yamllint.svg?branch=master
-   :target: https://travis-ci.org/adrienverge/yamllint
+   https://github.com/adrienverge/yamllint/actions/workflows/ci.yaml/badge.svg?branch=master
+   :target: https://github.com/adrienverge/yamllint/actions/workflows/ci.yaml?query=branch%3Amaster
    :alt: CI tests status
 .. image::
    https://coveralls.io/repos/github/adrienverge/yamllint/badge.svg?branch=master
@@ -19,11 +19,7 @@ indentation, etc.
    :target: https://yamllint.readthedocs.io/en/latest/?badge=latest
    :alt: Documentation status
 
-Written in Python (compatible with Python 2 & 3).
-
-⚠ Python 2 upstream support stopped on January 1, 2020. yamllint will keep
-best-effort support for Python 2.7 until January 1, 2021. Passed that date,
-yamllint will drop all Python 2-related code.
+Written in Python (compatible with Python 3 only).
 
 Documentation
 -------------
@@ -78,7 +74,7 @@ Usage
  # Output a parsable format (for syntax checking in editors like Vim, emacs...)
  yamllint -f parsable file.yaml
 
-`Read more in the complete documentation! <https://yamllint.readthedocs.io/>`_
+`Read more in the complete documentation! <https://yamllint.readthedocs.io/>`__
 
 Features
 ^^^^^^^^
@@ -136,7 +132,7 @@ Specific files can be ignored (totally or for some rules only) using a
        *.ignore-trailing-spaces.yaml
        /ascii-art/*
 
-`Read more in the complete documentation! <https://yamllint.readthedocs.io/>`_
+`Read more in the complete documentation! <https://yamllint.readthedocs.io/>`__
 
 License
 -------

docs/Makefile

@@ -2,7 +2,7 @@
 #
 
 # You can set these variables from the command line.
-SPHINXOPTS    =
+SPHINXOPTS    = -W
 SPHINXBUILD   = sphinx-build
 PAPER         =
 BUILDDIR      = _build

docs/conf.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # yamllint documentation build configuration file, created by
 # sphinx-quickstart on Thu Jan 21 21:18:52 2016.
 
@@ -21,7 +20,7 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 project = APP_NAME
-copyright = __copyright__
+copyright = __copyright__.lstrip('Copyright ')
 
 version = APP_VERSION
 release = APP_VERSION
@@ -39,7 +38,7 @@ htmlhelp_basename = 'yamllintdoc'
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
 man_pages = [
-    ('index', 'yamllint', '', [u'Adrien Vergé'], 1)
+    ('index', 'yamllint', 'Linter for YAML files', ['Adrien Vergé'], 1)
 ]
 
 # -- Build with sphinx automodule without needing to install third-party libs

docs/configuration.rst

@@ -14,11 +14,12 @@ To use a custom configuration file, use the ``-c`` option:
 If ``-c`` is not provided, yamllint will look for a configuration file in the
 following locations (by order of preference):
 
-- ``.yamllint``, ``.yamllint.yaml`` or ``.yamllint.yml`` in the current working
-  directory
-- the file referenced by ``$YAMLLINT_CONFIG_FILE``, if set
-- ``$XDG_CONFIG_HOME/yamllint/config``
-- ``~/.config/yamllint/config``
+- a file named ``.yamllint``, ``.yamllint.yaml``, or ``.yamllint.yml`` in the
+  current working directory, or a parent directory (the search for this file is
+  terminated at the user's home or filesystem root)
+- a filename referenced by ``$YAMLLINT_CONFIG_FILE``, if set
+- a file named ``$XDG_CONFIG_HOME/yamllint/config`` or
+  ``~/.config/yamllint/config``, if present
 
 Finally if no config file is found, the default configuration is applied.
 
@@ -136,11 +137,19 @@ directories, set ``yaml-files`` configuration option. The default is:
 The same rules as for ignoring paths apply (``.gitignore``-style path pattern,
 see below).
 
+If you need to know the exact list of files that yamllint would process,
+without really linting them, you can use ``--list-files``:
+
+.. code:: bash
+
+ yamllint --list-files .
+
 Ignoring paths
 --------------
 
 It is possible to exclude specific files or directories, so that the linter
-doesn't process them.
+doesn't process them. They can be provided either as a list of paths, or as a
+bulk string.
 
 You can either totally ignore files (they won't be looked at):
 
@@ -153,6 +162,13 @@ You can either totally ignore files (they won't be looked at):
    all/this/directory/
    *.template.yaml
 
+ # or:
+
+ ignore:
+   - /this/specific/file.yaml
+   - all/this/directory/
+   - '*.template.yaml'
+
 or ignore paths only for specific rules:
 
 .. code-block:: yaml
@@ -165,10 +181,18 @@ or ignore paths only for specific rules:
        /this-file-has-trailing-spaces-but-it-is-OK.yaml
        /generated/*.yaml
 
+ # or:
+
+ rules:
+   trailing-spaces:
+     ignore:
+       - /this-file-has-trailing-spaces-but-it-is-OK.yaml
+       - /generated/*.yaml
+
 Note that this ``.gitignore``-style path pattern allows complex path
 exclusion/inclusion, see the `pathspec README file
-<https://pypi.python.org/pypi/pathspec>`_ for more details.
-Here is a more complex example:
+<https://pypi.org/project/pathspec/>`_ for more details. Here is a more complex
+example:
 
 .. code-block:: yaml
 
@@ -190,6 +214,27 @@ Here is a more complex example:
        *.ignore-trailing-spaces.yaml
        ascii-art/*
 
+You can also use the ``.gitignore`` file (or any list of files) through:
+
+.. code-block:: yaml
+
+ ignore-from-file: .gitignore
+
+or:
+
+.. code-block:: yaml
+
+ ignore-from-file: [.gitignore, .yamlignore]
+
+.. note:: However, this is mutually exclusive with the ``ignore`` key.
+
+If you need to know the exact list of files that yamllint would process,
+without really linting them, you can use ``--list-files``:
+
+.. code:: bash
+
+ yamllint --list-files .
+
 Setting the locale
 ------------------
 

docs/development.rst

@@ -11,7 +11,7 @@ Basic example of running the linter from Python:
    import yamllint
 
    yaml_config = yamllint.config.YamlLintConfig("extends: default")
-   for p in yamllint.linter.run("example.yaml", yaml_config):
+   for p in yamllint.linter.run(open("example.yaml", "r"), yaml_config):
        print(p.desc, p.line, p.rule)
 
 .. automodule:: yamllint.linter

docs/disable_with_comments.rst

@@ -40,6 +40,11 @@ specific line:
  # yamllint disable-line
  -  {    all : rules ,are disabled   for this line}
 
+You can't make yamllint ignore invalid YAML syntax on a line (which generates a
+`syntax error`), such as when templating a YAML file with Jinja. In some cases,
+you can workaround this by putting the templating syntax in a YAML comment. See
+`Putting template flow control in comments`_.
+
 If you need to disable multiple rules, it is allowed to chain rules like this:
 ``# yamllint disable-line rule:hyphens rule:commas rule:indentation``.
 
@@ -89,7 +94,6 @@ For instance:
  key: value 2
 
  - This line is waaaaaaaaaay too long but yamllint will not report anything about it.
-   This line will be checked by yamllint.
 
 or:
 
@@ -101,3 +105,32 @@ or:
  key1: value1
  {% endif %}
  key2: value2
+
+Putting template flow control in comments
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Alternatively for templating you can wrap the template statements in comments
+to make it a valid YAML file. As long as the templating language doesn't use
+the same comment symbol, it should be a valid template and valid YAML (pre and
+post-template processing).
+
+Example of a Jinja2 code that cannot be parsed as YAML because it contains
+invalid tokens ``{%`` and ``%}``:
+
+.. code-block:: text
+
+ # This file IS NOT valid YAML and will produce syntax errors
+ {% if extra_info %}
+ key1: value1
+ {% endif %}
+ key2: value2
+
+But it can be fixed using YAML comments:
+
+.. code-block:: yaml
+
+ # This file IS valid YAML because the Jinja is in a YAML comment
+ # {% if extra_info %}
+ key1: value1
+ # {% endif %}
+ key2: value2

docs/index.rst

@@ -11,7 +11,7 @@ Screenshot
 
 .. note::
 
-   The default output format is inspired by `eslint <http://eslint.org/>`_, a
+   The default output format is inspired by `eslint <https://eslint.org/>`_, a
    great linting tool for Javascript.
 
 Table of contents

docs/integration.rst

@@ -4,7 +4,7 @@ Integration with other software
 Integration with pre-commit
 ---------------------------
 
-You can integrate yamllint in `pre-commit <http://pre-commit.com/>`_ tool.
+You can integrate yamllint in the `pre-commit <https://pre-commit.com/>`_ tool.
 Here is an example, to add in your .pre-commit-config.yaml
 
 .. code:: yaml
@@ -12,42 +12,56 @@ Here is an example, to add in your .pre-commit-config.yaml
   ---
   # Update the rev variable with the release version that you want, from the yamllint repo
   # You can pass your custom .yamllint with args attribute.
-  - repo: https://github.com/adrienverge/yamllint.git
-    rev: v1.17.0
-    hooks:
-      - id: yamllint
-        args: [-c=/path/to/.yamllint]
+  repos:
+    - repo: https://github.com/adrienverge/yamllint.git
+      rev: v1.29.0
+      hooks:
+        - id: yamllint
+          args: [--strict, -c=/path/to/.yamllint]
+
 
 Integration with GitHub Actions
 -------------------------------
 
 yamllint auto-detects when it's running inside of `GitHub
-Actions<https://github.com/features/actions>` and automatically uses the suited
-output format to decorate code with linting errors automatically. You can also
-force the GitHub Actions output with ``yamllint --format github``.
+Actions <https://github.com/features/actions>`_ and automatically uses the
+suited output format to decorate code with linting errors. You can also force
+the GitHub Actions output with ``yamllint --format github``.
 
-An example workflow using GitHub Actions:
+A minimal example workflow using GitHub Actions:
 
 .. code:: yaml
 
    ---
-   name: yamllint test
-
-   on: push
+   on: push  # yamllint disable-line rule:truthy
 
    jobs:
-     test:
+     lint:
        runs-on: ubuntu-latest
        steps:
-         - uses: actions/checkout@v2
-
-         - name: Set up Python
-           uses: actions/setup-python@v2
-           with:
-             python-version: 3.8
+         - uses: actions/checkout@v3
 
          - name: Install yamllint
            run: pip install yamllint
 
          - name: Lint YAML files
            run: yamllint .
+
+Integration with Arcanist
+-------------------------
+
+You can configure yamllint to run on ``arc lint``. Here is an example
+``.arclint`` file that makes use of this configuration.
+
+.. code:: json
+
+  {
+    "linters": {
+      "yamllint": {
+        "type": "script-and-regex",
+        "script-and-regex.script": "yamllint",
+        "script-and-regex.regex": "/^(?P<line>\\d+):(?P<offset>\\d+) +(?P<severity>warning|error) +(?P<message>.*) +\\((?P<name>.*)\\)$/m",
+        "include": "(\\.(yml|yaml)$)"
+      }
+    }
+  }

docs/quickstart.rst

@@ -4,7 +4,7 @@ Quickstart
 Installing yamllint
 -------------------
 
-On Fedora / CentOS (note: `EPEL <https://fedoraproject.org/wiki/EPEL>`_ is
+On Fedora / CentOS (note: `EPEL <https://docs.fedoraproject.org/en-US/epel/>`_ is
 required on CentOS):
 
 .. code:: bash
@@ -45,7 +45,7 @@ If you prefer installing from source, you can run, from the source directory:
 
 .. code:: bash
 
- python setup.py sdist
+ python -m build
  pip install --user dist/yamllint-*.tar.gz
 
 Running yamllint

docs/rules.rst

@@ -14,6 +14,11 @@ This page describes the rules and their options.
    :local:
    :depth: 1
 
+anchors
+-------
+
+.. automodule:: yamllint.rules.anchors
+
 braces
 ------
 
@@ -64,6 +69,12 @@ empty-values
 
 .. automodule:: yamllint.rules.empty_values
 
+float-values
+------------
+
+.. automodule:: yamllint.rules.float_values
+
+
 hyphens
 -------
 

docs/text_editors.rst

@@ -9,11 +9,11 @@ text editor.
 Vim
 ---
 
-Assuming that the `ALE <https://github.com/w0rp/ale>`_ plugin is
+Assuming that the `ALE <https://github.com/dense-analysis/ale>`_ plugin is
 installed, yamllint is supported by default. It is automatically enabled when
 editing YAML files.
 
-If you instead use the `syntastic <https://github.com/scrooloose/syntastic>`_
+If you instead use the `syntastic <https://github.com/vim-syntastic/syntastic>`_
 plugin, add this to your ``.vimrc``:
 
 ::
@@ -23,7 +23,7 @@ plugin, add this to your ``.vimrc``:
 Neovim
 ------
 
-Assuming that the `neomake <https://github.com/benekastah/neomake>`_ plugin is
+Assuming that the `neomake <https://github.com/neomake/neomake>`_ plugin is
 installed, yamllint is supported by default. It is automatically enabled when
 editing YAML files.
 
@@ -33,6 +33,16 @@ Emacs
 If you are `flycheck <https://github.com/flycheck/flycheck>`_ user, you can use
 `flycheck-yamllint <https://github.com/krzysztof-magosa/flycheck-yamllint>`_ integration.
 
+Visual Studio Code
+------------------
+
+https://marketplace.visualstudio.com/items?itemName=fnando.linter
+
+IntelliJ
+--------
+
+https://plugins.jetbrains.com/plugin/15349-yamllint
+
 Other text editors
 ------------------
 

pyproject.toml

@@ -0,0 +1,54 @@
+[project]
+name = "yamllint"
+description = "A linter for YAML files."
+readme = {file = "README.rst", content-type = "text/x-rst"}
+requires-python = ">=3.7"
+license = {text = "GPL-3.0-or-later"}
+authors = [{name = "Adrien Vergé"}]
+keywords = ["yaml", "lint", "linter", "syntax", "checker"]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Environment :: Console",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
+    "Programming Language :: Python",
+    "Topic :: Software Development",
+    "Topic :: Software Development :: Debuggers",
+    "Topic :: Software Development :: Quality Assurance",
+    "Topic :: Software Development :: Testing",
+]
+dependencies = [
+    "pathspec >= 0.5.3",
+    "pyyaml",
+]
+dynamic = ["version"]
+
+[project.optional-dependencies]
+dev = [
+    "doc8",
+    "flake8",
+    "flake8-import-order",
+    "rstcheck[sphinx]",
+    "sphinx",
+]
+
+[project.scripts]
+yamllint = "yamllint.cli:run"
+
+[project.urls]
+homepage = "https://github.com/adrienverge/yamllint"
+repository = "https://github.com/adrienverge/yamllint"
+documentation = "https://yamllint.readthedocs.io"
+
+[build-system]
+build-backend = "setuptools.build_meta"
+requires = ["setuptools >= 61"]
+
+[tool.setuptools]
+packages = ["yamllint", "yamllint.conf", "yamllint.rules"]
+
+[tool.setuptools.package-data]
+yamllint = ["conf/*.yaml"]
+
+[tool.setuptools.dynamic]
+version = {attr = "yamllint.__version__"}

setup.cfg

@@ -1,71 +0,0 @@
-[bdist_wheel]
-universal = 1
-
-[flake8]
-import-order-style = pep8
-application-import-names = yamllint
-ignore = W503,W504
-
-[build_sphinx]
-all-files = 1
-source-dir = docs
-build-dir = docs/_build
-warning-is-error = 1
-
-[metadata]
-keywords =
-  yaml
-  lint
-  linter
-  syntax
-  checker
-
-url = https://github.com/adrienverge/yamllint
-classifiers =
-  Development Status :: 5 - Production/Stable
-  Environment :: Console
-  Intended Audience :: Developers
-  License :: OSI Approved :: GNU General Public License v3 (GPLv3)
-  Programming Language :: Python :: 2
-  Programming Language :: Python :: 2.7
-  Programming Language :: Python :: 3
-  Programming Language :: Python :: 3.4
-  Programming Language :: Python :: 3.5
-  Programming Language :: Python :: 3.6
-  Programming Language :: Python :: 3.7
-  Programming Language :: Python :: 3.8
-  Topic :: Software Development
-  Topic :: Software Development :: Debuggers
-  Topic :: Software Development :: Quality Assurance
-  Topic :: Software Development :: Testing
-
-project_urls =
-  Documentation = https://yamllint.readthedocs.io
-  Download = https://pypi.org/project/yamllint/#files
-  Bug Tracker = https://github.com/adrienverge/yamllint/issues
-  Source Code = https://github.com/adrienverge/yamllint
-
-[options]
-packages = find:
-
-python_requires = >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*
-
-include_package_data = True
-install_requires =
-  pathspec >= 0.5.3
-  pyyaml
-  setuptools
-
-test_suite = tests
-
-[options.packages.find]
-exclude =
-  tests
-  tests.*
-
-[options.package_data]
-yamllint = conf/*.yaml
-
-[options.entry_points]
-console_scripts =
-  yamllint = yamllint.cli:run

setup.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -16,15 +15,6 @@
 
 from setuptools import setup
 
-from yamllint import (__author__, __license__,
-                      APP_NAME, APP_VERSION, APP_DESCRIPTION)
-
-
-setup(
-    name=APP_NAME,
-    version=APP_VERSION,
-    author=__author__,
-    description=APP_DESCRIPTION.split('\n')[0],
-    long_description=APP_DESCRIPTION,
-    license=__license__,
-)
+# This is only kept for backward-compatibility with older versions that don't
+# support new packaging standards (e.g. PEP 517 or PEP 660):
+setup()

tests/__init__.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

tests/common.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -14,7 +13,9 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import contextlib
 import os
+import shutil
 import tempfile
 import unittest
 
@@ -69,3 +70,17 @@ def build_temp_workspace(files):
                 f.write(content)
 
     return tempdir
+
+
+@contextlib.contextmanager
+def temp_workspace(files):
+    """Provide a temporary workspace that is automatically cleaned up."""
+    backup_wd = os.getcwd()
+    wd = build_temp_workspace(files)
+
+    try:
+        os.chdir(wd)
+        yield
+    finally:
+        os.chdir(backup_wd)
+        shutil.rmtree(wd)

tests/rules/test_anchors.py

@@ -0,0 +1,281 @@
+# Copyright (C) 2023 Adrien Vergé
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from tests.common import RuleTestCase
+
+
+class AnchorsTestCase(RuleTestCase):
+    rule_id = 'anchors'
+
+    def test_disabled(self):
+        conf = 'anchors: disable'
+        self.check('---\n'
+                   '- &b true\n'
+                   '- &i 42\n'
+                   '- &s hello\n'
+                   '- &f_m {k: v}\n'
+                   '- &f_s [1, 2]\n'
+                   '- *b\n'
+                   '- *i\n'
+                   '- *s\n'
+                   '- *f_m\n'
+                   '- *f_s\n'
+                   '---\n'  # redeclare anchors in a new document
+                   '- &b true\n'
+                   '- &i 42\n'
+                   '- &s hello\n'
+                   '- *b\n'
+                   '- *i\n'
+                   '- *s\n'
+                   '---\n'
+                   'block mapping: &b_m\n'
+                   '  key: value\n'
+                   'extended:\n'
+                   '  <<: *b_m\n'
+                   '  foo: bar\n'
+                   '---\n'
+                   '{a: 1, &x b: 2, c: &y 3, *x : 4, e: *y}\n'
+                   '...\n', conf)
+        self.check('---\n'
+                   '- &i 42\n'
+                   '---\n'
+                   '- &b true\n'
+                   '- &b true\n'
+                   '- &b true\n'
+                   '- &s hello\n'
+                   '- *b\n'
+                   '- *i\n'    # declared in a previous document
+                   '- *f_m\n'  # never declared
+                   '- *f_m\n'
+                   '- *f_m\n'
+                   '- *f_s\n'  # declared after
+                   '- &f_s [1, 2]\n'
+                   '---\n'
+                   'block mapping: &b_m\n'
+                   '  key: value\n'
+                   '---\n'
+                   'block mapping 1: &b_m_bis\n'
+                   '  key: value\n'
+                   'block mapping 2: &b_m_bis\n'
+                   '  key: value\n'
+                   'extended:\n'
+                   '  <<: *b_m\n'
+                   '  foo: bar\n'
+                   '---\n'
+                   '{a: 1, &x b: 2, c: &x 3, *x : 4, e: *y}\n'
+                   '...\n', conf)
+
+    def test_forbid_undeclared_aliases(self):
+        conf = ('anchors:\n'
+                '  forbid-undeclared-aliases: true\n'
+                '  forbid-duplicated-anchors: false\n'
+                '  forbid-unused-anchors: false\n')
+        self.check('---\n'
+                   '- &b true\n'
+                   '- &i 42\n'
+                   '- &s hello\n'
+                   '- &f_m {k: v}\n'
+                   '- &f_s [1, 2]\n'
+                   '- *b\n'
+                   '- *i\n'
+                   '- *s\n'
+                   '- *f_m\n'
+                   '- *f_s\n'
+                   '---\n'  # redeclare anchors in a new document
+                   '- &b true\n'
+                   '- &i 42\n'
+                   '- &s hello\n'
+                   '- *b\n'
+                   '- *i\n'
+                   '- *s\n'
+                   '---\n'
+                   'block mapping: &b_m\n'
+                   '  key: value\n'
+                   'extended:\n'
+                   '  <<: *b_m\n'
+                   '  foo: bar\n'
+                   '---\n'
+                   '{a: 1, &x b: 2, c: &y 3, *x : 4, e: *y}\n'
+                   '...\n', conf)
+        self.check('---\n'
+                   '- &i 42\n'
+                   '---\n'
+                   '- &b true\n'
+                   '- &b true\n'
+                   '- &b true\n'
+                   '- &s hello\n'
+                   '- *b\n'
+                   '- *i\n'    # declared in a previous document
+                   '- *f_m\n'  # never declared
+                   '- *f_m\n'
+                   '- *f_m\n'
+                   '- *f_s\n'  # declared after
+                   '- &f_s [1, 2]\n'
+                   '...\n'
+                   '---\n'
+                   'block mapping: &b_m\n'
+                   '  key: value\n'
+                   '---\n'
+                   'block mapping 1: &b_m_bis\n'
+                   '  key: value\n'
+                   'block mapping 2: &b_m_bis\n'
+                   '  key: value\n'
+                   'extended:\n'
+                   '  <<: *b_m\n'
+                   '  foo: bar\n'
+                   '---\n'
+                   '{a: 1, &x b: 2, c: &x 3, *x : 4, e: *y}\n'
+                   '...\n', conf,
+                   problem1=(9, 3),
+                   problem2=(10, 3),
+                   problem3=(11, 3),
+                   problem4=(12, 3),
+                   problem5=(13, 3),
+                   problem6=(25, 7),
+                   problem7=(28, 37))
+
+    def test_forbid_duplicated_anchors(self):
+        conf = ('anchors:\n'
+                '  forbid-undeclared-aliases: false\n'
+                '  forbid-duplicated-anchors: true\n'
+                '  forbid-unused-anchors: false\n')
+        self.check('---\n'
+                   '- &b true\n'
+                   '- &i 42\n'
+                   '- &s hello\n'
+                   '- &f_m {k: v}\n'
+                   '- &f_s [1, 2]\n'
+                   '- *b\n'
+                   '- *i\n'
+                   '- *s\n'
+                   '- *f_m\n'
+                   '- *f_s\n'
+                   '---\n'  # redeclare anchors in a new document
+                   '- &b true\n'
+                   '- &i 42\n'
+                   '- &s hello\n'
+                   '- *b\n'
+                   '- *i\n'
+                   '- *s\n'
+                   '---\n'
+                   'block mapping: &b_m\n'
+                   '  key: value\n'
+                   'extended:\n'
+                   '  <<: *b_m\n'
+                   '  foo: bar\n'
+                   '---\n'
+                   '{a: 1, &x b: 2, c: &y 3, *x : 4, e: *y}\n'
+                   '...\n', conf)
+        self.check('---\n'
+                   '- &i 42\n'
+                   '---\n'
+                   '- &b true\n'
+                   '- &b true\n'
+                   '- &b true\n'
+                   '- &s hello\n'
+                   '- *b\n'
+                   '- *i\n'    # declared in a previous document
+                   '- *f_m\n'  # never declared
+                   '- *f_m\n'
+                   '- *f_m\n'
+                   '- *f_s\n'  # declared after
+                   '- &f_s [1, 2]\n'
+                   '...\n'
+                   '---\n'
+                   'block mapping: &b_m\n'
+                   '  key: value\n'
+                   '---\n'
+                   'block mapping 1: &b_m_bis\n'
+                   '  key: value\n'
+                   'block mapping 2: &b_m_bis\n'
+                   '  key: value\n'
+                   'extended:\n'
+                   '  <<: *b_m\n'
+                   '  foo: bar\n'
+                   '---\n'
+                   '{a: 1, &x b: 2, c: &x 3, *x : 4, e: *y}\n'
+                   '...\n', conf,
+                   problem1=(5, 3),
+                   problem2=(6, 3),
+                   problem3=(22, 18),
+                   problem4=(28, 20))
+
+    def test_forbid_unused_anchors(self):
+        conf = ('anchors:\n'
+                '  forbid-undeclared-aliases: false\n'
+                '  forbid-duplicated-anchors: false\n'
+                '  forbid-unused-anchors: true\n')
+
+        self.check('---\n'
+                   '- &b true\n'
+                   '- &i 42\n'
+                   '- &s hello\n'
+                   '- &f_m {k: v}\n'
+                   '- &f_s [1, 2]\n'
+                   '- *b\n'
+                   '- *i\n'
+                   '- *s\n'
+                   '- *f_m\n'
+                   '- *f_s\n'
+                   '---\n'  # redeclare anchors in a new document
+                   '- &b true\n'
+                   '- &i 42\n'
+                   '- &s hello\n'
+                   '- *b\n'
+                   '- *i\n'
+                   '- *s\n'
+                   '---\n'
+                   'block mapping: &b_m\n'
+                   '  key: value\n'
+                   'extended:\n'
+                   '  <<: *b_m\n'
+                   '  foo: bar\n'
+                   '---\n'
+                   '{a: 1, &x b: 2, c: &y 3, *x : 4, e: *y}\n'
+                   '...\n', conf)
+        self.check('---\n'
+                   '- &i 42\n'
+                   '---\n'
+                   '- &b true\n'
+                   '- &b true\n'
+                   '- &b true\n'
+                   '- &s hello\n'
+                   '- *b\n'
+                   '- *i\n'    # declared in a previous document
+                   '- *f_m\n'  # never declared
+                   '- *f_m\n'
+                   '- *f_m\n'
+                   '- *f_s\n'  # declared after
+                   '- &f_s [1, 2]\n'
+                   '...\n'
+                   '---\n'
+                   'block mapping: &b_m\n'
+                   '  key: value\n'
+                   '---\n'
+                   'block mapping 1: &b_m_bis\n'
+                   '  key: value\n'
+                   'block mapping 2: &b_m_bis\n'
+                   '  key: value\n'
+                   'extended:\n'
+                   '  <<: *b_m\n'
+                   '  foo: bar\n'
+                   '---\n'
+                   '{a: 1, &x b: 2, c: &x 3, *x : 4, e: *y}\n'
+                   '...\n', conf,
+                   problem1=(2, 3),
+                   problem2=(7, 3),
+                   problem3=(14, 3),
+                   problem4=(17, 16),
+                   problem5=(22, 18))

tests/rules/test_braces.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -61,6 +60,30 @@ class ColonTestCase(RuleTestCase):
                    '  a: 1\n'
                    '}\n', conf, problem=(2, 8))
 
+        conf = ('braces:\n'
+                '  forbid: non-empty\n')
+        self.check('---\n'
+                   'dict:\n'
+                   '  a: 1\n', conf)
+        self.check('---\n'
+                   'dict: {}\n', conf)
+        self.check('---\n'
+                   'dict: {\n'
+                   '}\n', conf)
+        self.check('---\n'
+                   'dict: {\n'
+                   '# commented: value\n'
+                   '# another: value2\n'
+                   '}\n', conf)
+        self.check('---\n'
+                   'dict: {a}\n', conf, problem=(2, 8))
+        self.check('---\n'
+                   'dict: {a: 1}\n', conf, problem=(2, 8))
+        self.check('---\n'
+                   'dict: {\n'
+                   '  a: 1\n'
+                   '}\n', conf, problem=(2, 8))
+
     def test_min_spaces(self):
         conf = ('braces:\n'
                 '  max-spaces-inside: -1\n'

tests/rules/test_brackets.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -60,6 +59,29 @@ class ColonTestCase(RuleTestCase):
                    '  b\n'
                    ']\n', conf, problem=(2, 9))
 
+        conf = ('brackets:\n'
+                '  forbid: non-empty\n')
+        self.check('---\n'
+                   'array:\n'
+                   '  - a\n'
+                   '  - b\n', conf)
+        self.check('---\n'
+                   'array: []\n', conf)
+        self.check('---\n'
+                   'array: [\n\n'
+                   ']\n', conf)
+        self.check('---\n'
+                   'array: [\n'
+                   '# a comment\n'
+                   ']\n', conf)
+        self.check('---\n'
+                   'array: [a, b]\n', conf, problem=(2, 9))
+        self.check('---\n'
+                   'array: [\n'
+                   '  a,\n'
+                   '  b\n'
+                   ']\n', conf, problem=(2, 9))
+
     def test_min_spaces(self):
         conf = ('brackets:\n'
                 '  max-spaces-inside: -1\n'

tests/rules/test_colons.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -257,3 +256,19 @@ class ColonTestCase(RuleTestCase):
                    '  property: {a: 1, b:  2, c : 3}\n', conf,
                    problem1=(3, 11), problem2=(4, 4),
                    problem3=(8, 23), problem4=(8, 28))
+
+    # Although accepted by PyYAML, `{*x: 4}` is not valid YAML: it should be
+    # noted `{*x : 4}`. The reason is that a colon can be part of an anchor
+    # name. See commit message for more details.
+    def test_with_alias_as_key(self):
+        conf = 'colons: {max-spaces-before: 0, max-spaces-after: 1}'
+        self.check('---\n'
+                   '- anchor: &a key\n'
+                   '- *a: 42\n'
+                   '- {*a: 42}\n'
+                   '- *a : 42\n'
+                   '- {*a : 42}\n'
+                   '- *a  : 42\n'
+                   '- {*a  : 42}\n',
+                   conf,
+                   problem1=(7, 6), problem2=(8, 7))

tests/rules/test_commas.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

tests/rules/test_comments.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -97,7 +96,7 @@ class CommentsTestCase(RuleTestCase):
                    '#!/bin/env my-interpreter\n'
                    '', conf,
                    problem1=(1, 2), problem2=(3, 2), problem3=(4, 2))
-        self.check('#! not a shebang\n',
+        self.check('#! is a valid shebang too\n',
                    conf, problem1=(1, 2))
         self.check('key:  #!/not/a/shebang\n',
                    conf, problem1=(1, 8))
@@ -117,8 +116,7 @@ class CommentsTestCase(RuleTestCase):
                    '#comment\n'
                    '#!/bin/env my-interpreter\n', conf,
                    problem2=(3, 2), problem3=(4, 2))
-        self.check('#! not a shebang\n',
-                   conf, problem1=(1, 2))
+        self.check('#! is a valid shebang too\n', conf)
         self.check('key:  #!/not/a/shebang\n',
                    conf, problem1=(1, 8))
 

tests/rules/test_comments_indentation.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

tests/rules/test_common.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

tests/rules/test_document_end.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -72,3 +71,22 @@ class DocumentEndTestCase(RuleTestCase):
                    '---\n'
                    'third: document\n'
                    '...\n', conf, problem=(6, 1))
+
+    def test_directives(self):
+        conf = 'document-end: {present: true}'
+        self.check('%YAML 1.2\n'
+                   '---\n'
+                   'document: end\n'
+                   '...\n', conf)
+        self.check('%YAML 1.2\n'
+                   '%TAG ! tag:clarkevans.com,2002:\n'
+                   '---\n'
+                   'document: end\n'
+                   '...\n', conf)
+        self.check('---\n'
+                   'first: document\n'
+                   '...\n'
+                   '%YAML 1.2\n'
+                   '---\n'
+                   'second: document\n'
+                   '...\n', conf)

tests/rules/test_document_start.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

tests/rules/test_empty_lines.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

tests/rules/test_empty_values.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2017 Greg Dubicki
 #
 # This program is free software: you can redistribute it and/or modify

tests/rules/test_float_values.py

@@ -0,0 +1,128 @@
+# Copyright (C) 2022 the yamllint contributors
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from tests.common import RuleTestCase
+
+
+class FloatValuesTestCase(RuleTestCase):
+    rule_id = 'float-values'
+
+    def test_disabled(self):
+        conf = 'float-values: disable\n'
+        self.check('---\n'
+                   '- 0.0\n'
+                   '- .NaN\n'
+                   '- .INF\n'
+                   '- .1\n'
+                   '- 10e-6\n',
+                   conf)
+
+    def test_numeral_before_decimal(self):
+        conf = (
+            'float-values:\n'
+            '  require-numeral-before-decimal: true\n'
+            '  forbid-scientific-notation: false\n'
+            '  forbid-nan: false\n'
+            '  forbid-inf: false\n')
+        self.check('---\n'
+                   '- 0.0\n'
+                   '- .1\n'
+                   '- \'.1\'\n'
+                   '- string.1\n'
+                   '- .1string\n'
+                   '- !custom_tag .2\n'
+                   '- &angle1 0.0\n'
+                   '- *angle1\n'
+                   '- &angle2 .3\n'
+                   '- *angle2\n',
+                   conf,
+                   problem1=(3, 3),
+                   problem2=(10, 11))
+
+    def test_scientific_notation(self):
+        conf = (
+            'float-values:\n'
+            '  require-numeral-before-decimal: false\n'
+            '  forbid-scientific-notation: true\n'
+            '  forbid-nan: false\n'
+            '  forbid-inf: false\n')
+        self.check('---\n'
+                   '- 10e6\n'
+                   '- 10e-6\n'
+                   '- 0.00001\n'
+                   '- \'10e-6\'\n'
+                   '- string10e-6\n'
+                   '- 10e-6string\n'
+                   '- !custom_tag 10e-6\n'
+                   '- &angle1 0.000001\n'
+                   '- *angle1\n'
+                   '- &angle2 10e-6\n'
+                   '- *angle2\n'
+                   '- &angle3 10e6\n'
+                   '- *angle3\n',
+                   conf,
+                   problem1=(2, 3),
+                   problem2=(3, 3),
+                   problem3=(11, 11),
+                   problem4=(13, 11))
+
+    def test_nan(self):
+        conf = (
+            'float-values:\n'
+            '  require-numeral-before-decimal: false\n'
+            '  forbid-scientific-notation: false\n'
+            '  forbid-nan: true\n'
+            '  forbid-inf: false\n')
+        self.check('---\n'
+                   '- .NaN\n'
+                   '- .NAN\n'
+                   '- \'.NaN\'\n'
+                   '- a.NaN\n'
+                   '- .NaNa\n'
+                   '- !custom_tag .NaN\n'
+                   '- &angle .nan\n'
+                   '- *angle\n',
+                   conf,
+                   problem1=(2, 3),
+                   problem2=(3, 3),
+                   problem3=(8, 10))
+
+    def test_inf(self):
+        conf = (
+            'float-values:\n'
+            '  require-numeral-before-decimal: false\n'
+            '  forbid-scientific-notation: false\n'
+            '  forbid-nan: false\n'
+            '  forbid-inf: true\n')
+        self.check('---\n'
+                   '- .inf\n'
+                   '- .INF\n'
+                   '- -.inf\n'
+                   '- -.INF\n'
+                   '- \'.inf\'\n'
+                   '- ∞.infinity\n'
+                   '- .infinity∞\n'
+                   '- !custom_tag .inf\n'
+                   '- &angle .inf\n'
+                   '- *angle\n'
+                   '- &angle -.inf\n'
+                   '- *angle\n',
+                   conf,
+                   problem1=(2, 3),
+                   problem2=(3, 3),
+                   problem3=(4, 3),
+                   problem4=(5, 3),
+                   problem5=(10, 10),
+                   problem6=(12, 10))

tests/rules/test_hyphens.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

tests/rules/test_indentation.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -1371,6 +1370,45 @@ class IndentationTestCase(RuleTestCase):
                    '               key: value\n'
                    '...\n', conf, problem=(2, 2))
 
+    def test_nested_collections_with_spaces_consistent(self):
+        """Tests behavior of {spaces: consistent} in nested collections to
+        ensure wrong-indentation is properly caught--especially when the
+        expected indent value is initially unknown. For details, see
+        https://github.com/adrienverge/yamllint/issues/485.
+        """
+        conf = ('indentation: {spaces: consistent,\n'
+                '              indent-sequences: true}')
+        self.check('---\n'
+                   '- item:\n'
+                   '  - elem\n'
+                   '- item:\n'
+                   '    - elem\n'
+                   '...\n', conf, problem=(3, 3))
+        conf = ('indentation: {spaces: consistent,\n'
+                '              indent-sequences: false}')
+        self.check('---\n'
+                   '- item:\n'
+                   '  - elem\n'
+                   '- item:\n'
+                   '    - elem\n'
+                   '...\n', conf, problem=(5, 5))
+        conf = ('indentation: {spaces: consistent,\n'
+                '              indent-sequences: consistent}')
+        self.check('---\n'
+                   '- item:\n'
+                   '  - elem\n'
+                   '- item:\n'
+                   '    - elem\n'
+                   '...\n', conf, problem=(5, 5))
+        conf = ('indentation: {spaces: consistent,\n'
+                '              indent-sequences: whatever}')
+        self.check('---\n'
+                   '- item:\n'
+                   '  - elem\n'
+                   '- item:\n'
+                   '    - elem\n'
+                   '...\n', conf)
+
     def test_return(self):
         conf = 'indentation: {spaces: consistent}'
         self.check('---\n'

tests/rules/test_key_duplicates.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -87,6 +86,10 @@ class KeyDuplicatesTestCase(RuleTestCase):
                    'anchor_reference:\n'
                    '  <<: *anchor_one\n'
                    '  <<: *anchor_two\n', conf)
+        self.check('---\n'
+                   '{a: 1, b: 2}}\n', conf, problem=(2, 13, 'syntax'))
+        self.check('---\n'
+                   '[a, b, c]]\n', conf, problem=(2, 10, 'syntax'))
 
     def test_enabled(self):
         conf = 'key-duplicates: enable'
@@ -165,6 +168,10 @@ class KeyDuplicatesTestCase(RuleTestCase):
                    'anchor_reference:\n'
                    '  <<: *anchor_one\n'
                    '  <<: *anchor_two\n', conf)
+        self.check('---\n'
+                   '{a: 1, b: 2}}\n', conf, problem=(2, 13, 'syntax'))
+        self.check('---\n'
+                   '[a, b, c]]\n', conf, problem=(2, 10, 'syntax'))
 
     def test_key_tokens_in_flow_sequences(self):
         conf = 'key-duplicates: enable'

tests/rules/test_key_ordering.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2017 Johannes F. Knauf
 #
 # This program is free software: you can redistribute it and/or modify
@@ -117,7 +116,7 @@ class KeyOrderingTestCase(RuleTestCase):
         self.addCleanup(locale.setlocale, locale.LC_ALL, (None, None))
         try:
             locale.setlocale(locale.LC_ALL, 'en_US.UTF-8')
-        except locale.Error:
+        except locale.Error:  # pragma: no cover
             self.skipTest('locale en_US.UTF-8 not available')
         conf = ('key-ordering: enable')
         self.check('---\n'
@@ -136,7 +135,7 @@ class KeyOrderingTestCase(RuleTestCase):
         self.addCleanup(locale.setlocale, locale.LC_ALL, (None, None))
         try:
             locale.setlocale(locale.LC_ALL, 'en_US.UTF-8')
-        except locale.Error:
+        except locale.Error:  # pragma: no cover
             self.skipTest('locale en_US.UTF-8 not available')
         conf = ('key-ordering: enable')
         self.check('---\n'

tests/rules/test_line_length.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -14,9 +13,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import sys
-import unittest
-
 from tests.common import RuleTestCase
 
 
@@ -119,6 +115,27 @@ class LineLengthTestCase(RuleTestCase):
                    'long_line: http://localhost/very/very/long/url\n'
                    '...\n', conf, problem=(2, 21))
 
+        conf = 'line-length: {max: 20, allow-non-breakable-words: true}'
+        self.check('---\n'
+                   '# http://www.verylongurlurlurlurlurlurlurlurl.com\n'
+                   'key:\n'
+                   '  subkey: value\n', conf)
+        self.check('---\n'
+                   '## http://www.verylongurlurlurlurlurlurlurlurl.com\n'
+                   'key:\n'
+                   '  subkey: value\n', conf)
+        self.check('---\n'
+                   '# # http://www.verylongurlurlurlurlurlurlurlurl.com\n'
+                   'key:\n'
+                   '  subkey: value\n', conf,
+                   problem=(2, 21))
+        self.check('---\n'
+                   '#A http://www.verylongurlurlurlurlurlurlurlurl.com\n'
+                   'key:\n'
+                   '  subkey: value\n', conf,
+                   problem1=(2, 2, 'comments'),
+                   problem2=(2, 21, 'line-length'))
+
         conf = ('line-length: {max: 20, allow-non-breakable-words: true}\n'
                 'trailing-spaces: disable')
         self.check('---\n'
@@ -159,18 +176,17 @@ class LineLengthTestCase(RuleTestCase):
                    '  {% this line is' + 99 * ' really' + ' long %}\n',
                    conf, problem=(3, 81))
 
-    @unittest.skipIf(sys.version_info < (3, 0), 'Python 2 not supported')
     def test_unicode(self):
         conf = 'line-length: {max: 53}'
         self.check('---\n'
                    '# This is a test to check if “line-length” works nice\n'
-                   'with: “unicode characters” that span accross bytes! ↺\n',
+                   'with: “unicode characters” that span across bytes! ↺\n',
                    conf)
-        conf = 'line-length: {max: 52}'
+        conf = 'line-length: {max: 51}'
         self.check('---\n'
                    '# This is a test to check if “line-length” works nice\n'
-                   'with: “unicode characters” that span accross bytes! ↺\n',
-                   conf, problem1=(2, 53), problem2=(3, 53))
+                   'with: “unicode characters” that span across bytes! ↺\n',
+                   conf, problem1=(2, 52), problem2=(3, 52))
 
     def test_with_dos_newlines(self):
         conf = ('line-length: {max: 10}\n'

tests/rules/test_new_line_at_end_of_file.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

tests/rules/test_new_lines.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -14,6 +13,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+from unittest import mock
+
 from tests.common import RuleTestCase
 
 
@@ -59,3 +60,37 @@ class NewLinesTestCase(RuleTestCase):
         self.check('\r\n', conf)
         self.check('---\ntext\n', conf, problem=(1, 4))
         self.check('---\r\ntext\r\n', conf)
+
+    def test_platform_type(self):
+        conf = ('new-line-at-end-of-file: disable\n'
+                'new-lines: {type: platform}\n')
+
+        self.check('', conf)
+
+        # mock the Linux new-line-character
+        with mock.patch('yamllint.rules.new_lines.linesep', '\n'):
+            self.check('\n', conf)
+            self.check('\r\n', conf, problem=(1, 1))
+            self.check('---\ntext\n', conf)
+            self.check('---\r\ntext\r\n', conf, problem=(1, 4))
+            self.check('---\r\ntext\n', conf, problem=(1, 4))
+            # FIXME: the following tests currently don't work
+            # because only the first line is checked for line-endings
+            # see: issue #475
+            # ---
+            # self.check('---\ntext\r\nfoo\n', conf, problem=(2, 4))
+            # self.check('---\ntext\r\n', conf, problem=(2, 4))
+
+        # mock the Windows new-line-character
+        with mock.patch('yamllint.rules.new_lines.linesep', '\r\n'):
+            self.check('\r\n', conf)
+            self.check('\n', conf, problem=(1, 1))
+            self.check('---\r\ntext\r\n', conf)
+            self.check('---\ntext\n', conf, problem=(1, 4))
+            self.check('---\ntext\r\n', conf, problem=(1, 4))
+            # FIXME: the following tests currently don't work
+            # because only the first line is checked for line-endings
+            # see: issue #475
+            # ---
+            # self.check('---\r\ntext\nfoo\r\n', conf, problem=(2, 4))
+            # self.check('---\r\ntext\n', conf, problem=(2, 4))

tests/rules/test_octal_values.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -33,6 +32,7 @@ class OctalValuesTestCase(RuleTestCase):
                 '  forbid-explicit-octal: false\n'
                 'new-line-at-end-of-file: disable\n'
                 'document-start: disable\n')
+        self.check('after-tag: !custom_tag 010', conf)
         self.check('user-city: 010', conf, problem=(1, 15))
         self.check('user-city: abc', conf)
         self.check('user-city: 010,0571', conf)

tests/rules/test_quoted_strings.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2018 ClearScore
 #
 # This program is free software: you can redistribute it and/or modify
@@ -436,3 +435,124 @@ class QuotedTestCase(RuleTestCase):
                    '- foo bar\n'
                    '- "foo bar"\n',
                    conf, problem1=(3, 3), problem2=(7, 3), problem3=(11, 3))
+
+    def test_octal_values(self):
+        conf = 'quoted-strings: {required: true}\n'
+
+        self.check('---\n'
+                   '- 100\n'
+                   '- 0100\n'
+                   '- 0o100\n'
+                   '- 777\n'
+                   '- 0777\n'
+                   '- 0o777\n'
+                   '- 800\n'
+                   '- 0800\n'
+                   '- 0o800\n'
+                   '- "0800"\n'
+                   '- "0o800"\n',
+                   conf,
+                   problem1=(9, 3), problem2=(10, 3))
+
+    def test_allow_quoted_quotes(self):
+        conf = ('quoted-strings: {quote-type: single,\n'
+                '                 required: false,\n'
+                '                 allow-quoted-quotes: false}\n')
+        self.check('---\n'
+                   'foo1: "[barbaz]"\n'          # fails
+                   'foo2: "[bar\'baz]"\n',       # fails
+                   conf, problem1=(2, 7), problem2=(3, 7))
+
+        conf = ('quoted-strings: {quote-type: single,\n'
+                '                 required: false,\n'
+                '                 allow-quoted-quotes: true}\n')
+        self.check('---\n'
+                   'foo1: "[barbaz]"\n'          # fails
+                   'foo2: "[bar\'baz]"\n',
+                   conf, problem1=(2, 7))
+
+        conf = ('quoted-strings: {quote-type: single,\n'
+                '                 required: true,\n'
+                '                 allow-quoted-quotes: false}\n')
+        self.check('---\n'
+                   'foo1: "[barbaz]"\n'          # fails
+                   'foo2: "[bar\'baz]"\n',       # fails
+                   conf, problem1=(2, 7), problem2=(3, 7))
+
+        conf = ('quoted-strings: {quote-type: single,\n'
+                '                 required: true,\n'
+                '                 allow-quoted-quotes: true}\n')
+        self.check('---\n'
+                   'foo1: "[barbaz]"\n'          # fails
+                   'foo2: "[bar\'baz]"\n',
+                   conf, problem1=(2, 7))
+
+        conf = ('quoted-strings: {quote-type: single,\n'
+                '                 required: only-when-needed,\n'
+                '                 allow-quoted-quotes: false}\n')
+        self.check('---\n'
+                   'foo1: "[barbaz]"\n'          # fails
+                   'foo2: "[bar\'baz]"\n',       # fails
+                   conf, problem1=(2, 7), problem2=(3, 7))
+
+        conf = ('quoted-strings: {quote-type: single,\n'
+                '                 required: only-when-needed,\n'
+                '                 allow-quoted-quotes: true}\n')
+        self.check('---\n'
+                   'foo1: "[barbaz]"\n'          # fails
+                   'foo2: "[bar\'baz]"\n',
+                   conf, problem1=(2, 7))
+
+        conf = ('quoted-strings: {quote-type: double,\n'
+                '                 required: false,\n'
+                '                 allow-quoted-quotes: false}\n')
+        self.check("---\n"
+                   "foo1: '[barbaz]'\n"          # fails
+                   "foo2: '[bar\"baz]'\n",       # fails
+                   conf, problem1=(2, 7), problem2=(3, 7))
+
+        conf = ('quoted-strings: {quote-type: double,\n'
+                '                 required: false,\n'
+                '                 allow-quoted-quotes: true}\n')
+        self.check("---\n"
+                   "foo1: '[barbaz]'\n"          # fails
+                   "foo2: '[bar\"baz]'\n",
+                   conf, problem1=(2, 7))
+
+        conf = ('quoted-strings: {quote-type: double,\n'
+                '                 required: true,\n'
+                '                 allow-quoted-quotes: false}\n')
+        self.check("---\n"
+                   "foo1: '[barbaz]'\n"          # fails
+                   "foo2: '[bar\"baz]'\n",       # fails
+                   conf, problem1=(2, 7), problem2=(3, 7))
+
+        conf = ('quoted-strings: {quote-type: double,\n'
+                '                 required: true,\n'
+                '                 allow-quoted-quotes: true}\n')
+        self.check("---\n"
+                   "foo1: '[barbaz]'\n"          # fails
+                   "foo2: '[bar\"baz]'\n",
+                   conf, problem1=(2, 7))
+
+        conf = ('quoted-strings: {quote-type: double,\n'
+                '                 required: only-when-needed,\n'
+                '                 allow-quoted-quotes: false}\n')
+        self.check("---\n"
+                   "foo1: '[barbaz]'\n"          # fails
+                   "foo2: '[bar\"baz]'\n",       # fails
+                   conf, problem1=(2, 7), problem2=(3, 7))
+
+        conf = ('quoted-strings: {quote-type: double,\n'
+                '                 required: only-when-needed,\n'
+                '                 allow-quoted-quotes: true}\n')
+        self.check("---\n"
+                   "foo1: '[barbaz]'\n"          # fails
+                   "foo2: '[bar\"baz]'\n",
+                   conf, problem1=(2, 7))
+
+        conf = ('quoted-strings: {quote-type: any}\n')
+        self.check("---\n"
+                   "foo1: '[barbaz]'\n"
+                   "foo2: '[bar\"baz]'\n",
+                   conf)

tests/rules/test_trailing_spaces.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

tests/rules/test_truthy.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Peter Ericson
 #
 # This program is free software: you can redistribute it and/or modify

tests/test_cli.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -14,10 +13,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-try:
-    from cStringIO import StringIO
-except ImportError:
-    from io import StringIO
+from io import StringIO
 import fcntl
 import locale
 import os
@@ -27,13 +23,13 @@ import sys
 import tempfile
 import unittest
 
-from tests.common import build_temp_workspace
+from tests.common import build_temp_workspace, temp_workspace
 
 from yamllint import cli
 from yamllint import config
 
 
-class RunContext(object):
+class RunContext:
     """Context manager for ``cli.run()`` to capture exit code and streams."""
 
     def __init__(self, case):
@@ -62,7 +58,7 @@ def utf8_available():
         locale.setlocale(locale.LC_ALL, 'C.UTF-8')
         locale.setlocale(locale.LC_ALL, (None, None))
         return True
-    except locale.Error:
+    except locale.Error:  # pragma: no cover
         return False
 
 
@@ -96,12 +92,12 @@ class CommandLineTestCase(unittest.TestCase):
             'no-yaml.json': '---\n'
                             'key: value\n',
             # non-ASCII chars
-            u'non-ascii/éçäγλνπ¥/utf-8': (
-                u'---\n'
-                u'- hétérogénéité\n'
-                u'# 19.99 €\n'
-                u'- お早う御座います。\n'
-                u'# الأَبْجَدِيَّة العَرَبِيَّة\n').encode('utf-8'),
+            'non-ascii/éçäγλνπ¥/utf-8': (
+                '---\n'
+                '- hétérogénéité\n'
+                '# 19.99 €\n'
+                '- お早う御座います。\n'
+                '# الأَبْجَدِيَّة العَرَبِيَّة\n').encode('utf-8'),
             # dos line endings yaml
             'dos.yml': '---\r\n'
                        'dos: true',
@@ -246,19 +242,19 @@ class CommandLineTestCase(unittest.TestCase):
             cli.run(())
         self.assertNotEqual(ctx.returncode, 0)
         self.assertEqual(ctx.stdout, '')
-        self.assertRegexpMatches(ctx.stderr, r'^usage')
+        self.assertRegex(ctx.stderr, r'^usage')
 
         with RunContext(self) as ctx:
             cli.run(('--unknown-arg', ))
         self.assertNotEqual(ctx.returncode, 0)
         self.assertEqual(ctx.stdout, '')
-        self.assertRegexpMatches(ctx.stderr, r'^usage')
+        self.assertRegex(ctx.stderr, r'^usage')
 
         with RunContext(self) as ctx:
             cli.run(('-c', './conf.yaml', '-d', 'relaxed', 'file'))
         self.assertNotEqual(ctx.returncode, 0)
         self.assertEqual(ctx.stdout, '')
-        self.assertRegexpMatches(
+        self.assertRegex(
             ctx.stderr.splitlines()[-1],
             r'^yamllint: error: argument -d\/--config-data: '
             r'not allowed with argument -c\/--config-file$'
@@ -269,21 +265,31 @@ class CommandLineTestCase(unittest.TestCase):
             cli.run(('-', 'file'))
         self.assertNotEqual(ctx.returncode, 0)
         self.assertEqual(ctx.stdout, '')
-        self.assertRegexpMatches(ctx.stderr, r'^usage')
+        self.assertRegex(ctx.stderr, r'^usage')
 
     def test_run_with_bad_config(self):
         with RunContext(self) as ctx:
             cli.run(('-d', 'rules: {a: b}', 'file'))
         self.assertEqual(ctx.returncode, -1)
         self.assertEqual(ctx.stdout, '')
-        self.assertRegexpMatches(ctx.stderr, r'^invalid config: no such rule')
+        self.assertRegex(ctx.stderr, r'^invalid config: no such rule')
 
     def test_run_with_empty_config(self):
         with RunContext(self) as ctx:
             cli.run(('-d', '', 'file'))
         self.assertEqual(ctx.returncode, -1)
         self.assertEqual(ctx.stdout, '')
-        self.assertRegexpMatches(ctx.stderr, r'^invalid config: not a dict')
+        self.assertRegex(ctx.stderr, r'^invalid config: not a dict')
+
+    def test_run_with_implicit_extends_config(self):
+        path = os.path.join(self.wd, 'warn.yaml')
+
+        with RunContext(self) as ctx:
+            cli.run(('-d', 'default', '-f', 'parsable', path))
+        expected_out = ('%s:1:1: [warning] missing document start "---" '
+                        '(document-start)\n' % path)
+        self.assertEqual(
+            (ctx.returncode, ctx.stdout, ctx.stderr), (0, expected_out, ''))
 
     def test_run_with_config_file(self):
         with open(os.path.join(self.wd, 'config'), 'w') as f:
@@ -300,6 +306,7 @@ class CommandLineTestCase(unittest.TestCase):
             cli.run(('-c', f.name, os.path.join(self.wd, 'a.yaml')))
         self.assertEqual(ctx.returncode, 1)
 
+    @unittest.skipIf(os.environ.get('GITHUB_RUN_ID'), '$HOME not overridable')
     def test_run_with_user_global_config_file(self):
         home = os.path.join(self.wd, 'fake-home')
         dir = os.path.join(home, '.config', 'yamllint')
@@ -323,6 +330,19 @@ class CommandLineTestCase(unittest.TestCase):
             cli.run((os.path.join(self.wd, 'a.yaml'), ))
         self.assertEqual(ctx.returncode, 1)
 
+    def test_run_with_user_xdg_config_home_in_env(self):
+        self.addCleanup(os.environ.__delitem__, 'XDG_CONFIG_HOME')
+
+        with tempfile.TemporaryDirectory('w') as d:
+            os.environ['XDG_CONFIG_HOME'] = d
+            os.makedirs(os.path.join(d, 'yamllint'))
+            with open(os.path.join(d, 'yamllint', 'config'), 'w') as f:
+                f.write('extends: relaxed')
+            with RunContext(self) as ctx:
+                cli.run(('-f', 'parsable', os.path.join(self.wd, 'warn.yaml')))
+
+        self.assertEqual((ctx.returncode, ctx.stdout, ctx.stderr), (0, '', ''))
+
     def test_run_with_user_yamllint_config_file_in_env(self):
         self.addCleanup(os.environ.__delitem__, 'YAMLLINT_CONFIG_FILE')
 
@@ -348,7 +368,7 @@ class CommandLineTestCase(unittest.TestCase):
         # as the first two runs don't use setlocale()
         try:
             locale.setlocale(locale.LC_ALL, 'en_US.UTF-8')
-        except locale.Error:
+        except locale.Error:  # pragma: no cover
             self.skipTest('locale en_US.UTF-8 not available')
         locale.setlocale(locale.LC_ALL, (None, None))
 
@@ -386,7 +406,7 @@ class CommandLineTestCase(unittest.TestCase):
         with RunContext(self) as ctx:
             cli.run(('--version', ))
         self.assertEqual(ctx.returncode, 0)
-        self.assertRegexpMatches(ctx.stdout + ctx.stderr, r'yamllint \d+\.\d+')
+        self.assertRegex(ctx.stdout + ctx.stderr, r'yamllint \d+\.\d+')
 
     def test_run_non_existing_file(self):
         path = os.path.join(self.wd, 'i-do-not-exist.yaml')
@@ -395,7 +415,7 @@ class CommandLineTestCase(unittest.TestCase):
             cli.run(('-f', 'parsable', path))
         self.assertEqual(ctx.returncode, -1)
         self.assertEqual(ctx.stdout, '')
-        self.assertRegexpMatches(ctx.stderr, r'No such file or directory')
+        self.assertRegex(ctx.stderr, r'No such file or directory')
 
     def test_run_one_problem_file(self):
         path = os.path.join(self.wd, 'a.yaml')
@@ -549,17 +569,32 @@ class CommandLineTestCase(unittest.TestCase):
         self.assertEqual(
             (ctx.returncode, ctx.stdout, ctx.stderr), (1, expected_out, ''))
 
+    def test_run_format_colored_warning(self):
+        path = os.path.join(self.wd, 'warn.yaml')
+
+        with RunContext(self) as ctx:
+            cli.run((path, '--format', 'colored'))
+        expected_out = (
+            '\033[4m%s\033[0m\n'
+            '  \033[2m1:1\033[0m       \033[33mwarning\033[0m  '
+            'missing document start "---"  \033[2m(document-start)\033[0m\n'
+            '\n' % path)
+        self.assertEqual(
+            (ctx.returncode, ctx.stdout, ctx.stderr), (0, expected_out, ''))
+
     def test_run_format_github(self):
         path = os.path.join(self.wd, 'a.yaml')
 
         with RunContext(self) as ctx:
             cli.run((path, '--format', 'github'))
         expected_out = (
-            '::error file=%s,line=2,col=4::[trailing-spaces] trailing'
+            '::group::%s\n'
+            '::error file=%s,line=2,col=4::2:4 [trailing-spaces] trailing'
             ' spaces\n'
-            '::error file=%s,line=3,col=4::[new-line-at-end-of-file] no'
+            '::error file=%s,line=3,col=4::3:4 [new-line-at-end-of-file] no'
             ' new line character at the end of file\n'
-            % (path, path))
+            '::endgroup::\n\n'
+            % (path, path, path))
         self.assertEqual(
             (ctx.returncode, ctx.stdout, ctx.stderr), (1, expected_out, ''))
 
@@ -573,11 +608,13 @@ class CommandLineTestCase(unittest.TestCase):
             os.environ['GITHUB_WORKFLOW'] = 'something'
             cli.run((path, ))
         expected_out = (
-            '::error file=%s,line=2,col=4::[trailing-spaces] trailing'
+            '::group::%s\n'
+            '::error file=%s,line=2,col=4::2:4 [trailing-spaces] trailing'
             ' spaces\n'
-            '::error file=%s,line=3,col=4::[new-line-at-end-of-file] no'
+            '::error file=%s,line=3,col=4::3:4 [new-line-at-end-of-file] no'
             ' new line character at the end of file\n'
-            % (path, path))
+            '::endgroup::\n\n'
+            % (path, path, path))
         self.assertEqual(
             (ctx.returncode, ctx.stdout, ctx.stderr), (1, expected_out, ''))
 
@@ -640,3 +677,121 @@ class CommandLineTestCase(unittest.TestCase):
             '\n' % path)
         self.assertEqual(
             (ctx.returncode, ctx.stdout, ctx.stderr), (1, expected_out, ''))
+
+    def test_run_list_files(self):
+        with RunContext(self) as ctx:
+            cli.run(('--list-files', self.wd))
+        self.assertEqual(ctx.returncode, 0)
+        self.assertEqual(
+            sorted(ctx.stdout.splitlines()),
+            [os.path.join(self.wd, 'a.yaml'),
+             os.path.join(self.wd, 'c.yaml'),
+             os.path.join(self.wd, 'dos.yml'),
+             os.path.join(self.wd, 'empty.yml'),
+             os.path.join(self.wd, 'en.yaml'),
+             os.path.join(self.wd, 's/s/s/s/s/s/s/s/s/s/s/s/s/s/s/file.yaml'),
+             os.path.join(self.wd, 'sub/directory.yaml/empty.yml'),
+             os.path.join(self.wd, 'sub/ok.yaml'),
+             os.path.join(self.wd, 'warn.yaml')]
+        )
+
+        config = '{ignore: "*.yml", yaml-files: ["*.*"]}'
+        with RunContext(self) as ctx:
+            cli.run(('--list-files', '-d', config, self.wd))
+        self.assertEqual(ctx.returncode, 0)
+        self.assertEqual(
+            sorted(ctx.stdout.splitlines()),
+            [os.path.join(self.wd, 'a.yaml'),
+             os.path.join(self.wd, 'c.yaml'),
+             os.path.join(self.wd, 'en.yaml'),
+             os.path.join(self.wd, 'no-yaml.json'),
+             os.path.join(self.wd, 's/s/s/s/s/s/s/s/s/s/s/s/s/s/s/file.yaml'),
+             os.path.join(self.wd, 'sub/directory.yaml/not-yaml.txt'),
+             os.path.join(self.wd, 'sub/ok.yaml'),
+             os.path.join(self.wd, 'warn.yaml')]
+        )
+
+
+class CommandLineConfigTestCase(unittest.TestCase):
+    def test_config_file(self):
+        workspace = {'a.yml': 'hello: world\n'}
+        conf = ('---\n'
+                'extends: relaxed\n')
+
+        for conf_file in ('.yamllint', '.yamllint.yml', '.yamllint.yaml'):
+            with self.subTest(conf_file):
+                with temp_workspace(workspace):
+                    with RunContext(self) as ctx:
+                        cli.run(('-f', 'parsable', '.'))
+
+                self.assertEqual((ctx.returncode, ctx.stdout, ctx.stderr),
+                                 (0, './a.yml:1:1: [warning] missing document '
+                                     'start "---" (document-start)\n', ''))
+
+                with temp_workspace({**workspace, **{conf_file: conf}}):
+                    with RunContext(self) as ctx:
+                        cli.run(('-f', 'parsable', '.'))
+
+                self.assertEqual((ctx.returncode, ctx.stdout, ctx.stderr),
+                                 (0, '', ''))
+
+    def test_parent_config_file(self):
+        workspace = {'a/b/c/d/e/f/g/a.yml': 'hello: world\n'}
+        conf = ('---\n'
+                'extends: relaxed\n')
+
+        for conf_file in ('.yamllint', '.yamllint.yml', '.yamllint.yaml'):
+            with self.subTest(conf_file):
+                with temp_workspace(workspace):
+                    with RunContext(self) as ctx:
+                        os.chdir('a/b/c/d/e/f')
+                        cli.run(('-f', 'parsable', '.'))
+
+                self.assertEqual((ctx.returncode, ctx.stdout, ctx.stderr),
+                                 (0, './g/a.yml:1:1: [warning] missing '
+                                     'document start "---" (document-start)\n',
+                                     ''))
+
+                with temp_workspace({**workspace, **{conf_file: conf}}):
+                    with RunContext(self) as ctx:
+                        os.chdir('a/b/c/d/e/f')
+                        cli.run(('-f', 'parsable', '.'))
+
+                self.assertEqual((ctx.returncode, ctx.stdout, ctx.stderr),
+                                 (0, '', ''))
+
+    def test_multiple_parent_config_file(self):
+        workspace = {'a/b/c/3spaces.yml': 'array:\n'
+                                          '   - item\n',
+                     'a/b/c/4spaces.yml': 'array:\n'
+                                          '    - item\n',
+                     'a/.yamllint': '---\n'
+                                    'extends: relaxed\n'
+                                    'rules:\n'
+                                    '  indentation:\n'
+                                    '    spaces: 4\n',
+                     }
+
+        conf3 = ('---\n'
+                 'extends: relaxed\n'
+                 'rules:\n'
+                 '  indentation:\n'
+                 '    spaces: 3\n')
+
+        with temp_workspace(workspace):
+            with RunContext(self) as ctx:
+                os.chdir('a/b/c')
+                cli.run(('-f', 'parsable', '.'))
+
+        self.assertEqual((ctx.returncode, ctx.stdout, ctx.stderr),
+                         (0, './3spaces.yml:2:4: [warning] wrong indentation: '
+                         'expected 4 but found 3 (indentation)\n', ''))
+
+        with temp_workspace({**workspace, **{'a/b/.yamllint.yml': conf3}}):
+            with RunContext(self) as ctx:
+                os.chdir('a/b/c')
+                cli.run(('-f', 'parsable', '.'))
+
+        self.assertEqual((ctx.returncode, ctx.stdout, ctx.stderr),
+                         (0, './4spaces.yml:2:5: [warning] wrong indentation: '
+                         'expected 3 but found 4 (indentation)\n', ''))

tests/test_config.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -14,10 +13,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-try:
-    from cStringIO import StringIO
-except ImportError:
-    from io import StringIO
+from io import StringIO
 import os
 import shutil
 import sys
@@ -26,6 +22,7 @@ import unittest
 
 from tests.common import build_temp_workspace
 
+from yamllint.config import YamlLintConfigError
 from yamllint import cli
 from yamllint import config
 
@@ -48,7 +45,7 @@ class SimpleConfigTestCase(unittest.TestCase):
             config.YamlLintConfig('not: valid: yaml')
 
     def test_unknown_rule(self):
-        with self.assertRaisesRegexp(
+        with self.assertRaisesRegex(
                 config.YamlLintConfigError,
                 'invalid config: no such rule: "this-one-does-not-exist"'):
             config.YamlLintConfig('rules:\n'
@@ -67,7 +64,7 @@ class SimpleConfigTestCase(unittest.TestCase):
         self.assertEqual(c.rules['colons']['max-spaces-after'], 1)
 
     def test_unknown_option(self):
-        with self.assertRaisesRegexp(
+        with self.assertRaisesRegex(
                 config.YamlLintConfigError,
                 'invalid config: unknown option "abcdef" for rule "colons"'):
             config.YamlLintConfig('rules:\n'
@@ -105,7 +102,7 @@ class SimpleConfigTestCase(unittest.TestCase):
         self.assertEqual(c.rules['indentation']['check-multi-line-strings'],
                          False)
 
-        with self.assertRaisesRegexp(
+        with self.assertRaisesRegex(
                 config.YamlLintConfigError,
                 'invalid config: option "indent-sequences" of "indentation" '
                 'should be in '):
@@ -125,7 +122,7 @@ class SimpleConfigTestCase(unittest.TestCase):
         self.assertEqual(c.rules['hyphens'], False)
 
     def test_validate_rule_conf(self):
-        class Rule(object):
+        class Rule:
             ID = 'fake'
 
         self.assertFalse(config.validate_rule_conf(Rule, False))
@@ -193,6 +190,41 @@ class SimpleConfigTestCase(unittest.TestCase):
                           config.validate_rule_conf, Rule,
                           {'multiple': ['item4']})
 
+    def test_invalid_rule(self):
+        with self.assertRaisesRegex(
+                config.YamlLintConfigError,
+                'invalid config: rule "colons": should be either '
+                '"enable", "disable" or a dict'):
+            config.YamlLintConfig('rules:\n'
+                                  '  colons: invalid\n')
+
+    def test_invalid_ignore(self):
+        with self.assertRaisesRegex(
+                config.YamlLintConfigError,
+                'invalid config: ignore should contain file patterns'):
+            config.YamlLintConfig('ignore: yes\n')
+
+    def test_invalid_rule_ignore(self):
+        with self.assertRaisesRegex(
+                config.YamlLintConfigError,
+                'invalid config: ignore should contain file patterns'):
+            config.YamlLintConfig('rules:\n'
+                                  '  colons:\n'
+                                  '    ignore: yes\n')
+
+    def test_invalid_locale(self):
+        with self.assertRaisesRegex(
+                config.YamlLintConfigError,
+                'invalid config: locale should be a string'):
+            config.YamlLintConfig('locale: yes\n')
+
+    def test_invalid_yaml_files(self):
+        with self.assertRaisesRegex(
+                config.YamlLintConfigError,
+                'invalid config: yaml-files should be a list of file '
+                'patterns'):
+            config.YamlLintConfig('yaml-files: yes\n')
+
 
 class ExtendedConfigTestCase(unittest.TestCase):
     def test_extend_on_object(self):
@@ -337,6 +369,26 @@ class ExtendedConfigTestCase(unittest.TestCase):
         self.assertEqual(c.rules['colons']['max-spaces-before'], 0)
         self.assertEqual(c.rules['colons']['max-spaces-after'], 1)
 
+    def test_extended_ignore_str(self):
+        with tempfile.NamedTemporaryFile('w') as f:
+            f.write('ignore: |\n'
+                    '  *.template.yaml\n')
+            f.flush()
+            c = config.YamlLintConfig('extends: ' + f.name + '\n')
+
+        self.assertEqual(c.ignore.match_file('test.template.yaml'), True)
+        self.assertEqual(c.ignore.match_file('test.yaml'), False)
+
+    def test_extended_ignore_list(self):
+        with tempfile.NamedTemporaryFile('w') as f:
+            f.write('ignore:\n'
+                    '  - "*.template.yaml"\n')
+            f.flush()
+            c = config.YamlLintConfig('extends: ' + f.name + '\n')
+
+        self.assertEqual(c.ignore.match_file('test.template.yaml'), True)
+        self.assertEqual(c.ignore.match_file('test.yaml'), False)
+
 
 class ExtendedLibraryConfigTestCase(unittest.TestCase):
     def test_extend_config_disable_rule(self):
@@ -388,10 +440,10 @@ class ExtendedLibraryConfigTestCase(unittest.TestCase):
         self.assertEqual(new.rules['empty-lines']['max-end'], 0)
 
 
-class IgnorePathConfigTestCase(unittest.TestCase):
+class IgnoreConfigTestCase(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
-        super(IgnorePathConfigTestCase, cls).setUpClass()
+        super().setUpClass()
 
         bad_yaml = ('---\n'
                     '- key: val1\n'
@@ -411,22 +463,6 @@ class IgnorePathConfigTestCase(unittest.TestCase):
             's/s/ign-trail/file.yaml': bad_yaml,
             's/s/ign-trail/s/s/file.yaml': bad_yaml,
             's/s/ign-trail/s/s/file2.lint-me-anyway.yaml': bad_yaml,
-
-            '.yamllint': 'ignore: |\n'
-                         '  *.dont-lint-me.yaml\n'
-                         '  /bin/\n'
-                         '  !/bin/*.lint-me-anyway.yaml\n'
-                         '\n'
-                         'extends: default\n'
-                         '\n'
-                         'rules:\n'
-                         '  key-duplicates:\n'
-                         '    ignore: |\n'
-                         '      /ign-dup\n'
-                         '  trailing-spaces:\n'
-                         '    ignore: |\n'
-                         '      ign-trail\n'
-                         '      !*.lint-me-anyway.yaml\n',
         })
 
         cls.backup_wd = os.getcwd()
@@ -434,13 +470,255 @@ class IgnorePathConfigTestCase(unittest.TestCase):
 
     @classmethod
     def tearDownClass(cls):
-        super(IgnorePathConfigTestCase, cls).tearDownClass()
+        super().tearDownClass()
 
         os.chdir(cls.backup_wd)
 
         shutil.rmtree(cls.wd)
 
-    def test_run_with_ignored_path(self):
+    def test_mutually_exclusive_ignore_keys(self):
+        self.assertRaises(
+            YamlLintConfigError,
+            config.YamlLintConfig, 'extends: default\n'
+                                   'ignore-from-file: .gitignore\n'
+                                   'ignore: |\n'
+                                   '  *.dont-lint-me.yaml\n'
+                                   '  /bin/\n')
+
+    def test_ignore_from_file_not_exist(self):
+        self.assertRaises(
+            FileNotFoundError,
+            config.YamlLintConfig, 'extends: default\n'
+                                   'ignore-from-file: not_found_file\n')
+
+    def test_ignore_from_file_incorrect_type(self):
+        self.assertRaises(
+            YamlLintConfigError,
+            config.YamlLintConfig, 'extends: default\n'
+                                   'ignore-from-file: 0\n')
+        self.assertRaises(
+            YamlLintConfigError,
+            config.YamlLintConfig, 'extends: default\n'
+                                   'ignore-from-file: [0]\n')
+
+    def test_no_ignore(self):
+        sys.stdout = StringIO()
+        with self.assertRaises(SystemExit):
+            cli.run(('-f', 'parsable', '.'))
+
+        out = sys.stdout.getvalue()
+        out = '\n'.join(sorted(out.splitlines()))
+
+        keydup = '[error] duplication of key "key" in mapping (key-duplicates)'
+        trailing = '[error] trailing spaces (trailing-spaces)'
+        hyphen = '[error] too many spaces after hyphen (hyphens)'
+
+        self.assertEqual(out, '\n'.join((
+            './bin/file.lint-me-anyway.yaml:3:3: ' + keydup,
+            './bin/file.lint-me-anyway.yaml:4:17: ' + trailing,
+            './bin/file.lint-me-anyway.yaml:5:5: ' + hyphen,
+            './bin/file.yaml:3:3: ' + keydup,
+            './bin/file.yaml:4:17: ' + trailing,
+            './bin/file.yaml:5:5: ' + hyphen,
+            './file-at-root.yaml:3:3: ' + keydup,
+            './file-at-root.yaml:4:17: ' + trailing,
+            './file-at-root.yaml:5:5: ' + hyphen,
+            './file.dont-lint-me.yaml:3:3: ' + keydup,
+            './file.dont-lint-me.yaml:4:17: ' + trailing,
+            './file.dont-lint-me.yaml:5:5: ' + hyphen,
+            './ign-dup/file.yaml:3:3: ' + keydup,
+            './ign-dup/file.yaml:4:17: ' + trailing,
+            './ign-dup/file.yaml:5:5: ' + hyphen,
+            './ign-dup/sub/dir/file.yaml:3:3: ' + keydup,
+            './ign-dup/sub/dir/file.yaml:4:17: ' + trailing,
+            './ign-dup/sub/dir/file.yaml:5:5: ' + hyphen,
+            './ign-trail/file.yaml:3:3: ' + keydup,
+            './ign-trail/file.yaml:4:17: ' + trailing,
+            './ign-trail/file.yaml:5:5: ' + hyphen,
+            './include/ign-dup/sub/dir/file.yaml:3:3: ' + keydup,
+            './include/ign-dup/sub/dir/file.yaml:4:17: ' + trailing,
+            './include/ign-dup/sub/dir/file.yaml:5:5: ' + hyphen,
+            './s/s/ign-trail/file.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/file.yaml:4:17: ' + trailing,
+            './s/s/ign-trail/file.yaml:5:5: ' + hyphen,
+            './s/s/ign-trail/s/s/file.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/s/s/file.yaml:4:17: ' + trailing,
+            './s/s/ign-trail/s/s/file.yaml:5:5: ' + hyphen,
+            './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:4:17: ' + trailing,
+            './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:5:5: ' + hyphen,
+        )))
+
+    def test_run_with_ignore_str(self):
+        with open(os.path.join(self.wd, '.yamllint'), 'w') as f:
+            f.write('extends: default\n'
+                    'ignore: |\n'
+                    '  *.dont-lint-me.yaml\n'
+                    '  /bin/\n'
+                    '  !/bin/*.lint-me-anyway.yaml\n'
+                    'rules:\n'
+                    '  key-duplicates:\n'
+                    '    ignore: |\n'
+                    '      /ign-dup\n'
+                    '  trailing-spaces:\n'
+                    '    ignore: |\n'
+                    '      ign-trail\n'
+                    '      !*.lint-me-anyway.yaml\n')
+
+        sys.stdout = StringIO()
+        with self.assertRaises(SystemExit):
+            cli.run(('-f', 'parsable', '.'))
+
+        out = sys.stdout.getvalue()
+        out = '\n'.join(sorted(out.splitlines()))
+
+        docstart = '[warning] missing document start "---" (document-start)'
+        keydup = '[error] duplication of key "key" in mapping (key-duplicates)'
+        trailing = '[error] trailing spaces (trailing-spaces)'
+        hyphen = '[error] too many spaces after hyphen (hyphens)'
+
+        self.assertEqual(out, '\n'.join((
+            './.yamllint:1:1: ' + docstart,
+            './bin/file.lint-me-anyway.yaml:3:3: ' + keydup,
+            './bin/file.lint-me-anyway.yaml:4:17: ' + trailing,
+            './bin/file.lint-me-anyway.yaml:5:5: ' + hyphen,
+            './file-at-root.yaml:3:3: ' + keydup,
+            './file-at-root.yaml:4:17: ' + trailing,
+            './file-at-root.yaml:5:5: ' + hyphen,
+            './ign-dup/file.yaml:4:17: ' + trailing,
+            './ign-dup/file.yaml:5:5: ' + hyphen,
+            './ign-dup/sub/dir/file.yaml:4:17: ' + trailing,
+            './ign-dup/sub/dir/file.yaml:5:5: ' + hyphen,
+            './ign-trail/file.yaml:3:3: ' + keydup,
+            './ign-trail/file.yaml:5:5: ' + hyphen,
+            './include/ign-dup/sub/dir/file.yaml:3:3: ' + keydup,
+            './include/ign-dup/sub/dir/file.yaml:4:17: ' + trailing,
+            './include/ign-dup/sub/dir/file.yaml:5:5: ' + hyphen,
+            './s/s/ign-trail/file.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/file.yaml:5:5: ' + hyphen,
+            './s/s/ign-trail/s/s/file.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/s/s/file.yaml:5:5: ' + hyphen,
+            './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:4:17: ' + trailing,
+            './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:5:5: ' + hyphen,
+        )))
+
+    def test_run_with_ignore_list(self):
+        with open(os.path.join(self.wd, '.yamllint'), 'w') as f:
+            f.write('extends: default\n'
+                    'ignore:\n'
+                    '  - "*.dont-lint-me.yaml"\n'
+                    '  - "/bin/"\n'
+                    '  - "!/bin/*.lint-me-anyway.yaml"\n'
+                    'rules:\n'
+                    '  key-duplicates:\n'
+                    '    ignore:\n'
+                    '      - "/ign-dup"\n'
+                    '  trailing-spaces:\n'
+                    '    ignore:\n'
+                    '      - "ign-trail"\n'
+                    '      - "!*.lint-me-anyway.yaml"\n')
+
+        sys.stdout = StringIO()
+        with self.assertRaises(SystemExit):
+            cli.run(('-f', 'parsable', '.'))
+
+        out = sys.stdout.getvalue()
+        out = '\n'.join(sorted(out.splitlines()))
+
+        docstart = '[warning] missing document start "---" (document-start)'
+        keydup = '[error] duplication of key "key" in mapping (key-duplicates)'
+        trailing = '[error] trailing spaces (trailing-spaces)'
+        hyphen = '[error] too many spaces after hyphen (hyphens)'
+
+        self.assertEqual(out, '\n'.join((
+            './.yamllint:1:1: ' + docstart,
+            './bin/file.lint-me-anyway.yaml:3:3: ' + keydup,
+            './bin/file.lint-me-anyway.yaml:4:17: ' + trailing,
+            './bin/file.lint-me-anyway.yaml:5:5: ' + hyphen,
+            './file-at-root.yaml:3:3: ' + keydup,
+            './file-at-root.yaml:4:17: ' + trailing,
+            './file-at-root.yaml:5:5: ' + hyphen,
+            './ign-dup/file.yaml:4:17: ' + trailing,
+            './ign-dup/file.yaml:5:5: ' + hyphen,
+            './ign-dup/sub/dir/file.yaml:4:17: ' + trailing,
+            './ign-dup/sub/dir/file.yaml:5:5: ' + hyphen,
+            './ign-trail/file.yaml:3:3: ' + keydup,
+            './ign-trail/file.yaml:5:5: ' + hyphen,
+            './include/ign-dup/sub/dir/file.yaml:3:3: ' + keydup,
+            './include/ign-dup/sub/dir/file.yaml:4:17: ' + trailing,
+            './include/ign-dup/sub/dir/file.yaml:5:5: ' + hyphen,
+            './s/s/ign-trail/file.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/file.yaml:5:5: ' + hyphen,
+            './s/s/ign-trail/s/s/file.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/s/s/file.yaml:5:5: ' + hyphen,
+            './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:4:17: ' + trailing,
+            './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:5:5: ' + hyphen,
+        )))
+
+    def test_run_with_ignore_from_file(self):
+        with open(os.path.join(self.wd, '.yamllint'), 'w') as f:
+            f.write('extends: default\n'
+                    'ignore-from-file: .gitignore\n')
+        with open(os.path.join(self.wd, '.gitignore'), 'w') as f:
+            f.write('*.dont-lint-me.yaml\n'
+                    '/bin/\n'
+                    '!/bin/*.lint-me-anyway.yaml\n')
+
+        sys.stdout = StringIO()
+        with self.assertRaises(SystemExit):
+            cli.run(('-f', 'parsable', '.'))
+
+        out = sys.stdout.getvalue()
+        out = '\n'.join(sorted(out.splitlines()))
+
+        docstart = '[warning] missing document start "---" (document-start)'
+        keydup = '[error] duplication of key "key" in mapping (key-duplicates)'
+        trailing = '[error] trailing spaces (trailing-spaces)'
+        hyphen = '[error] too many spaces after hyphen (hyphens)'
+
+        self.assertEqual(out, '\n'.join((
+            './.yamllint:1:1: ' + docstart,
+            './bin/file.lint-me-anyway.yaml:3:3: ' + keydup,
+            './bin/file.lint-me-anyway.yaml:4:17: ' + trailing,
+            './bin/file.lint-me-anyway.yaml:5:5: ' + hyphen,
+            './file-at-root.yaml:3:3: ' + keydup,
+            './file-at-root.yaml:4:17: ' + trailing,
+            './file-at-root.yaml:5:5: ' + hyphen,
+            './ign-dup/file.yaml:3:3: ' + keydup,
+            './ign-dup/file.yaml:4:17: ' + trailing,
+            './ign-dup/file.yaml:5:5: ' + hyphen,
+            './ign-dup/sub/dir/file.yaml:3:3: ' + keydup,
+            './ign-dup/sub/dir/file.yaml:4:17: ' + trailing,
+            './ign-dup/sub/dir/file.yaml:5:5: ' + hyphen,
+            './ign-trail/file.yaml:3:3: ' + keydup,
+            './ign-trail/file.yaml:4:17: ' + trailing,
+            './ign-trail/file.yaml:5:5: ' + hyphen,
+            './include/ign-dup/sub/dir/file.yaml:3:3: ' + keydup,
+            './include/ign-dup/sub/dir/file.yaml:4:17: ' + trailing,
+            './include/ign-dup/sub/dir/file.yaml:5:5: ' + hyphen,
+            './s/s/ign-trail/file.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/file.yaml:4:17: ' + trailing,
+            './s/s/ign-trail/file.yaml:5:5: ' + hyphen,
+            './s/s/ign-trail/s/s/file.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/s/s/file.yaml:4:17: ' + trailing,
+            './s/s/ign-trail/s/s/file.yaml:5:5: ' + hyphen,
+            './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:4:17: ' + trailing,
+            './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:5:5: ' + hyphen,
+        )))
+
+    def test_run_with_ignored_from_file(self):
+        with open(os.path.join(self.wd, '.yamllint'), 'w') as f:
+            f.write('ignore-from-file: [.gitignore, .yamlignore]\n'
+                    'extends: default\n')
+        with open(os.path.join(self.wd, '.gitignore'), 'w') as f:
+            f.write('*.dont-lint-me.yaml\n'
+                    '/bin/\n')
+        with open(os.path.join(self.wd, '.yamlignore'), 'w') as f:
+            f.write('!/bin/*.lint-me-anyway.yaml\n')
+
         sys.stdout = StringIO()
         with self.assertRaises(SystemExit):
             cli.run(('-f', 'parsable', '.'))
@@ -461,18 +739,23 @@ class IgnorePathConfigTestCase(unittest.TestCase):
             './file-at-root.yaml:3:3: ' + keydup,
             './file-at-root.yaml:4:17: ' + trailing,
             './file-at-root.yaml:5:5: ' + hyphen,
+            './ign-dup/file.yaml:3:3: ' + keydup,
             './ign-dup/file.yaml:4:17: ' + trailing,
             './ign-dup/file.yaml:5:5: ' + hyphen,
+            './ign-dup/sub/dir/file.yaml:3:3: ' + keydup,
             './ign-dup/sub/dir/file.yaml:4:17: ' + trailing,
             './ign-dup/sub/dir/file.yaml:5:5: ' + hyphen,
             './ign-trail/file.yaml:3:3: ' + keydup,
+            './ign-trail/file.yaml:4:17: ' + trailing,
             './ign-trail/file.yaml:5:5: ' + hyphen,
             './include/ign-dup/sub/dir/file.yaml:3:3: ' + keydup,
             './include/ign-dup/sub/dir/file.yaml:4:17: ' + trailing,
             './include/ign-dup/sub/dir/file.yaml:5:5: ' + hyphen,
             './s/s/ign-trail/file.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/file.yaml:4:17: ' + trailing,
             './s/s/ign-trail/file.yaml:5:5: ' + hyphen,
             './s/s/ign-trail/s/s/file.yaml:3:3: ' + keydup,
+            './s/s/ign-trail/s/s/file.yaml:4:17: ' + trailing,
             './s/s/ign-trail/s/s/file.yaml:5:5: ' + hyphen,
             './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:3:3: ' + keydup,
             './s/s/ign-trail/s/s/file2.lint-me-anyway.yaml:4:17: ' + trailing,

tests/test_linter.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -32,10 +31,10 @@ class LinterTestCase(unittest.TestCase):
         linter.run(b'test: document', self.fake_config())
 
     def test_run_on_unicode(self):
-        linter.run(u'test: document', self.fake_config())
+        linter.run('test: document', self.fake_config())
 
     def test_run_on_stream(self):
-        linter.run(io.StringIO(u'hello'), self.fake_config())
+        linter.run(io.StringIO('hello'), self.fake_config())
 
     def test_run_on_int(self):
         self.assertRaises(TypeError, linter.run, 42, self.fake_config())
@@ -45,13 +44,23 @@ class LinterTestCase(unittest.TestCase):
                           ['h', 'e', 'l', 'l', 'o'], self.fake_config())
 
     def test_run_on_non_ascii_chars(self):
-        s = (u'- hétérogénéité\n'
-             u'# 19.99 €\n')
+        s = ('- hétérogénéité\n'
+             '# 19.99 €\n')
         linter.run(s, self.fake_config())
         linter.run(s.encode('utf-8'), self.fake_config())
         linter.run(s.encode('iso-8859-15'), self.fake_config())
 
-        s = (u'- お早う御座います。\n'
-             u'# الأَبْجَدِيَّة العَرَبِيَّة\n')
+        s = ('- お早う御座います。\n'
+             '# الأَبْجَدِيَّة العَرَبِيَّة\n')
         linter.run(s, self.fake_config())
         linter.run(s.encode('utf-8'), self.fake_config())
+
+    def test_linter_problem_repr_without_rule(self):
+        problem = linter.LintProblem(1, 2, 'problem')
+
+        self.assertEqual(str(problem), '1:2: problem')
+
+    def test_linter_problem_repr_with_rule(self):
+        problem = linter.LintProblem(1, 2, 'problem', 'rule-id')
+
+        self.assertEqual(str(problem), '1:2: problem (rule-id)')

tests/test_module.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2017 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -47,16 +46,15 @@ class ModuleTestCase(unittest.TestCase):
             subprocess.check_output([PYTHON, '-m', 'yamllint'],
                                     stderr=subprocess.STDOUT)
         self.assertEqual(ctx.exception.returncode, 2)
-        self.assertRegexpMatches(ctx.exception.output.decode(),
-                                 r'^usage: yamllint')
+        self.assertRegex(ctx.exception.output.decode(), r'^usage: yamllint')
 
     def test_run_module_on_bad_dir(self):
         with self.assertRaises(subprocess.CalledProcessError) as ctx:
             subprocess.check_output([PYTHON, '-m', 'yamllint',
                                      '/does/not/exist'],
                                     stderr=subprocess.STDOUT)
-        self.assertRegexpMatches(ctx.exception.output.decode(),
-                                 r'No such file or directory')
+        self.assertRegex(ctx.exception.output.decode(),
+                         r'No such file or directory')
 
     def test_run_module_on_file(self):
         out = subprocess.check_output(

tests/test_parser.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

tests/test_spec_examples.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -14,7 +13,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from io import open
 import os
 
 from tests.common import RuleTestCase

tests/test_syntax_errors.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

tests/test_yamllint_directives.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

yamllint/__init__.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -22,10 +21,10 @@ indentation, etc."""
 
 
 APP_NAME = 'yamllint'
-APP_VERSION = '1.25.0'
+APP_VERSION = '1.32.0'
 APP_DESCRIPTION = __doc__
 
-__author__ = u'Adrien Vergé'
-__copyright__ = u'Copyright 2016, Adrien Vergé'
+__author__ = 'Adrien Vergé'
+__copyright__ = 'Copyright 2022, Adrien Vergé'
 __license__ = 'GPLv3'
 __version__ = APP_VERSION

yamllint/cli.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -14,10 +13,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import print_function
-
 import argparse
-import io
 import locale
 import os
 import platform
@@ -50,7 +46,7 @@ def supports_color():
             hasattr(sys.stdout, 'isatty') and sys.stdout.isatty())
 
 
-class Format(object):
+class Format:
     @staticmethod
     def parsable(problem, filename):
         return ('%(file)s:%(line)s:%(column)s: [%(level)s] %(message)s' %
@@ -93,6 +89,10 @@ class Format(object):
         line += 'line=' + format(problem.line) + ','
         line += 'col=' + format(problem.column)
         line += '::'
+        line += format(problem.line)
+        line += ':'
+        line += format(problem.column)
+        line += ' '
         if problem.rule:
             line += '[' + problem.rule + '] '
         line += problem.desc
@@ -103,18 +103,25 @@ def show_problems(problems, file, args_format, no_warn):
     max_level = 0
     first = True
 
+    if args_format == 'auto':
+        if ('GITHUB_ACTIONS' in os.environ and
+                'GITHUB_WORKFLOW' in os.environ):
+            args_format = 'github'
+        elif supports_color():
+            args_format = 'colored'
+
     for problem in problems:
         max_level = max(max_level, PROBLEM_LEVELS[problem.level])
         if no_warn and (problem.level != 'error'):
             continue
         if args_format == 'parsable':
             print(Format.parsable(problem, file))
-        elif args_format == 'github' or (args_format == 'auto' and
-                                         'GITHUB_ACTIONS' in os.environ and
-                                         'GITHUB_WORKFLOW' in os.environ):
+        elif args_format == 'github':
+            if first:
+                print('::group::%s' % file)
+                first = False
             print(Format.github(problem, file))
-        elif args_format == 'colored' or \
-                (args_format == 'auto' and supports_color()):
+        elif args_format == 'colored':
             if first:
                 print('\033[4m%s\033[0m' % file)
                 first = False
@@ -125,12 +132,28 @@ def show_problems(problems, file, args_format, no_warn):
                 first = False
             print(Format.standard(problem, file))
 
+    if not first and args_format == 'github':
+        print('::endgroup::')
+
     if not first and args_format != 'parsable':
         print('')
 
     return max_level
 
 
+def find_project_config_filepath(path='.'):
+    for filename in ('.yamllint', '.yamllint.yaml', '.yamllint.yml'):
+        filepath = os.path.join(path, filename)
+        if os.path.isfile(filepath):
+            return filepath
+
+    if os.path.abspath(path) == os.path.abspath(os.path.expanduser('~')):
+        return None
+    if os.path.abspath(path) == os.path.abspath(os.path.join(path, '..')):
+        return None
+    return find_project_config_filepath(path=os.path.join(path, '..'))
+
+
 def run(argv=None):
     parser = argparse.ArgumentParser(prog=APP_NAME,
                                      description=APP_DESCRIPTION)
@@ -147,6 +170,8 @@ def run(argv=None):
     config_group.add_argument('-d', '--config-data', dest='config_data',
                               action='store',
                               help='custom configuration (as YAML source)')
+    parser.add_argument('--list-files', action='store_true', dest='list_files',
+                        help='list files to lint and exit')
     parser.add_argument('-f', '--format',
                         choices=('parsable', 'standard', 'colored', 'github',
                                  'auto'),
@@ -173,6 +198,7 @@ def run(argv=None):
     else:
         user_global_config = os.path.expanduser('~/.config/yamllint/config')
 
+    project_config_filepath = find_project_config_filepath()
     try:
         if args.config_data is not None:
             if args.config_data != '' and ':' not in args.config_data:
@@ -180,12 +206,8 @@ def run(argv=None):
             conf = YamlLintConfig(content=args.config_data)
         elif args.config_file is not None:
             conf = YamlLintConfig(file=args.config_file)
-        elif os.path.isfile('.yamllint'):
-            conf = YamlLintConfig(file='.yamllint')
-        elif os.path.isfile('.yamllint.yaml'):
-            conf = YamlLintConfig(file='.yamllint.yaml')
-        elif os.path.isfile('.yamllint.yml'):
-            conf = YamlLintConfig(file='.yamllint.yml')
+        elif project_config_filepath:
+            conf = YamlLintConfig(file=project_config_filepath)
         elif os.path.isfile(user_global_config):
             conf = YamlLintConfig(file=user_global_config)
         else:
@@ -197,14 +219,20 @@ def run(argv=None):
     if conf.locale is not None:
         locale.setlocale(locale.LC_ALL, conf.locale)
 
+    if args.list_files:
+        for file in find_files_recursively(args.files, conf):
+            if not conf.is_file_ignored(file):
+                print(file)
+        sys.exit(0)
+
     max_level = 0
 
     for file in find_files_recursively(args.files, conf):
         filepath = file[2:] if file.startswith('./') else file
         try:
-            with io.open(file, newline='') as f:
+            with open(file, newline='') as f:
                 problems = linter.run(f, conf, filepath)
-        except EnvironmentError as e:
+        except OSError as e:
             print(e, file=sys.stderr)
             sys.exit(-1)
         prob_level = show_problems(problems, file, args_format=args.format,
@@ -215,7 +243,7 @@ def run(argv=None):
     if args.stdin:
         try:
             problems = linter.run(sys.stdin, conf, '')
-        except EnvironmentError as e:
+        except OSError as e:
             print(e, file=sys.stderr)
             sys.exit(-1)
         prob_level = show_problems(problems, 'stdin', args_format=args.format,

yamllint/conf/default.yaml

@@ -6,6 +6,7 @@ yaml-files:
   - '.yamllint'
 
 rules:
+  anchors: enable
   braces: enable
   brackets: enable
   colons: enable
@@ -19,6 +20,7 @@ rules:
     level: warning
   empty-lines: enable
   empty-values: disable
+  float-values: disable
   hyphens: enable
   indentation: enable
   key-duplicates: enable

yamllint/config.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -14,6 +13,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import fileinput
 import os.path
 
 import pathspec
@@ -26,7 +26,7 @@ class YamlLintConfigError(Exception):
     pass
 
 
-class YamlLintConfig(object):
+class YamlLintConfig:
     def __init__(self, content=None, file=None):
         assert (content is None) ^ (file is None)
 
@@ -97,12 +97,31 @@ class YamlLintConfig(object):
             except Exception as e:
                 raise YamlLintConfigError('invalid config: %s' % e)
 
-        if 'ignore' in conf:
-            if not isinstance(conf['ignore'], str):
+        if 'ignore' in conf and 'ignore-from-file' in conf:
+            raise YamlLintConfigError(
+                'invalid config: ignore and ignore-from-file keys cannot be '
+                'used together')
+        elif 'ignore-from-file' in conf:
+            if isinstance(conf['ignore-from-file'], str):
+                conf['ignore-from-file'] = [conf['ignore-from-file']]
+            if not (isinstance(conf['ignore-from-file'], list) and all(
+                    isinstance(ln, str) for ln in conf['ignore-from-file'])):
+                raise YamlLintConfigError(
+                    'invalid config: ignore-from-file should contain '
+                    'filename(s), either as a list or string')
+            with fileinput.input(conf['ignore-from-file']) as f:
+                self.ignore = pathspec.PathSpec.from_lines('gitwildmatch', f)
+        elif 'ignore' in conf:
+            if isinstance(conf['ignore'], str):
+                self.ignore = pathspec.PathSpec.from_lines(
+                    'gitwildmatch', conf['ignore'].splitlines())
+            elif (isinstance(conf['ignore'], list) and
+                    all(isinstance(line, str) for line in conf['ignore'])):
+                self.ignore = pathspec.PathSpec.from_lines(
+                    'gitwildmatch', conf['ignore'])
+            else:
                 raise YamlLintConfigError(
                     'invalid config: ignore should contain file patterns')
-            self.ignore = pathspec.PathSpec.from_lines(
-                'gitwildmatch', conf['ignore'].splitlines())
 
         if 'yaml-files' in conf:
             if not (isinstance(conf['yaml-files'], list)
@@ -136,11 +155,16 @@ def validate_rule_conf(rule, conf):
     if isinstance(conf, dict):
         if ('ignore' in conf and
                 not isinstance(conf['ignore'], pathspec.pathspec.PathSpec)):
-            if not isinstance(conf['ignore'], str):
+            if isinstance(conf['ignore'], str):
+                conf['ignore'] = pathspec.PathSpec.from_lines(
+                    'gitwildmatch', conf['ignore'].splitlines())
+            elif (isinstance(conf['ignore'], list) and
+                    all(isinstance(line, str) for line in conf['ignore'])):
+                conf['ignore'] = pathspec.PathSpec.from_lines(
+                    'gitwildmatch', conf['ignore'])
+            else:
                 raise YamlLintConfigError(
                     'invalid config: ignore should contain file patterns')
-            conf['ignore'] = pathspec.PathSpec.from_lines(
-                'gitwildmatch', conf['ignore'].splitlines())
 
         if 'level' not in conf:
             conf['level'] = 'error'
@@ -151,7 +175,7 @@ def validate_rule_conf(rule, conf):
         options = getattr(rule, 'CONF', {})
         options_default = getattr(rule, 'DEFAULT', {})
         for optkey in conf:
-            if optkey in ('ignore', 'level'):
+            if optkey in ('ignore', 'ignore-from-file', 'level'):
                 continue
             if optkey not in options:
                 raise YamlLintConfigError(

yamllint/linter.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -15,6 +14,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import re
+import io
 
 import yaml
 
@@ -30,8 +30,11 @@ PROBLEM_LEVELS = {
     'error': 2,
 }
 
+DISABLE_RULE_PATTERN = re.compile(r'^# yamllint disable( rule:\S+)*\s*$')
+ENABLE_RULE_PATTERN = re.compile(r'^# yamllint enable( rule:\S+)*\s*$')
 
-class LintProblem(object):
+
+class LintProblem:
     """Represents a linting problem found by yamllint."""
     def __init__(self, line, column, desc='<no description>', rule=None):
         #: Line on which the problem was found (starting at 1)
@@ -81,12 +84,9 @@ def get_cosmetic_problems(buffer, conf, filepath):
             self.all_rules = {r.ID for r in rules}
 
         def process_comment(self, comment):
-            try:
-                comment = str(comment)
-            except UnicodeError:
-                return  # this certainly wasn't a yamllint directive comment
+            comment = str(comment)
 
-            if re.match(r'^# yamllint disable( rule:\S+)*\s*$', comment):
+            if DISABLE_RULE_PATTERN.match(comment):
                 items = comment[18:].rstrip().split(' ')
                 rules = [item[5:] for item in items][1:]
                 if len(rules) == 0:
@@ -96,7 +96,7 @@ def get_cosmetic_problems(buffer, conf, filepath):
                         if id in self.all_rules:
                             self.rules.add(id)
 
-            elif re.match(r'^# yamllint enable( rule:\S+)*\s*$', comment):
+            elif ENABLE_RULE_PATTERN.match(comment):
                 items = comment[17:].rstrip().split(' ')
                 rules = [item[5:] for item in items][1:]
                 if len(rules) == 0:
@@ -110,10 +110,7 @@ def get_cosmetic_problems(buffer, conf, filepath):
 
     class DisableLineDirective(DisableDirective):
         def process_comment(self, comment):
-            try:
-                comment = str(comment)
-            except UnicodeError:
-                return  # this certainly wasn't a yamllint directive comment
+            comment = str(comment)
 
             if re.match(r'^# yamllint disable-line( rule:\S+)*\s*$', comment):
                 items = comment[23:].rstrip().split(' ')
@@ -125,7 +122,7 @@ def get_cosmetic_problems(buffer, conf, filepath):
                         if id in self.all_rules:
                             self.rules.add(id)
 
-    # Use a cache to store problems and flush it only when a end of line is
+    # Use a cache to store problems and flush it only when an end of line is
     # found. This allows the use of yamllint directive to disable some rules on
     # some lines.
     cache = []
@@ -206,15 +203,11 @@ def _run(buffer, conf, filepath):
                 syntax_error.column <= problem.column):
             yield syntax_error
 
-            # If there is already a yamllint error at the same place, discard
-            # it as it is probably redundant (and maybe it's just a 'warning',
+            # Discard the problem since it is at the same place as the syntax
+            # error and is probably redundant (and maybe it's just a 'warning',
             # in which case the script won't even exit with a failure status).
-            if (syntax_error.line == problem.line and
-                    syntax_error.column == problem.column):
-                syntax_error = None
-                continue
-
             syntax_error = None
+            continue
 
         yield problem
 
@@ -230,12 +223,12 @@ def run(input, conf, filepath=None):
     :param input: buffer, string or stream to read from
     :param conf: yamllint configuration object
     """
-    if conf.is_file_ignored(filepath):
+    if filepath is not None and conf.is_file_ignored(filepath):
         return ()
 
-    if isinstance(input, (type(b''), type(u''))):  # compat with Python 2 & 3
+    if isinstance(input, (bytes, str)):
         return _run(input, conf, filepath)
-    elif hasattr(input, 'read'):  # Python 2's file or Python 3's io.IOBase
+    elif isinstance(input, io.IOBase):
         # We need to have everything in memory to parse correctly
         content = input.read()
         return _run(content, conf, filepath)

yamllint/parser.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -17,7 +16,7 @@
 import yaml
 
 
-class Line(object):
+class Line:
     def __init__(self, line_no, buffer, start, end):
         self.line_no = line_no
         self.start = start
@@ -29,7 +28,7 @@ class Line(object):
         return self.buffer[self.start:self.end]
 
 
-class Token(object):
+class Token:
     def __init__(self, line_no, curr, prev, next, nextnext):
         self.line_no = line_no
         self.curr = curr
@@ -38,7 +37,7 @@ class Token(object):
         self.nextnext = nextnext
 
 
-class Comment(object):
+class Comment:
     def __init__(self, line_no, column_no, buffer, pointer,
                  token_before=None, token_after=None, comment_before=None):
         self.line_no = line_no
@@ -133,8 +132,7 @@ def token_or_comment_generator(buffer):
 
             yield Token(curr.start_mark.line + 1, curr, prev, next, nextnext)
 
-            for comment in comments_between_tokens(curr, next):
-                yield comment
+            yield from comments_between_tokens(curr, next)
 
             prev = curr
             curr = next

yamllint/rules/__init__.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -15,6 +14,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from yamllint.rules import (
+    anchors,
     braces,
     brackets,
     colons,
@@ -33,12 +33,14 @@ from yamllint.rules import (
     new_line_at_end_of_file,
     new_lines,
     octal_values,
+    float_values,
     quoted_strings,
     trailing_spaces,
     truthy,
 )
 
 _RULES = {
+    anchors.ID: anchors,
     braces.ID: braces,
     brackets.ID: brackets,
     colons.ID: colons,
@@ -49,6 +51,7 @@ _RULES = {
     document_start.ID: document_start,
     empty_lines.ID: empty_lines,
     empty_values.ID: empty_values,
+    float_values.ID: float_values,
     hyphens.ID: hyphens,
     indentation.ID: indentation,
     key_duplicates.ID: key_duplicates,

yamllint/rules/anchors.py

@@ -0,0 +1,174 @@
+# Copyright (C) 2023 Adrien Vergé
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+Use this rule to report duplicated anchors and aliases referencing undeclared
+anchors.
+
+.. rubric:: Options
+
+* Set ``forbid-undeclared-aliases`` to ``true`` to avoid aliases that reference
+  an anchor that hasn't been declared (either not declared at all, or declared
+  later in the document).
+* Set ``forbid-duplicated-anchors`` to ``true`` to avoid duplications of a same
+  anchor.
+* Set ``forbid-unused-anchors`` to ``true`` to avoid anchors being declared but
+  not used anywhere in the YAML document via alias.
+
+.. rubric:: Default values (when enabled)
+
+.. code-block:: yaml
+
+ rules:
+   anchors:
+     forbid-undeclared-aliases: true
+     forbid-duplicated-anchors: false
+     forbid-unused-anchors: false
+
+.. rubric:: Examples
+
+#. With ``anchors: {forbid-undeclared-aliases: true}``
+
+   the following code snippet would **PASS**:
+   ::
+
+    ---
+    - &anchor
+      foo: bar
+    - *anchor
+
+   the following code snippet would **FAIL**:
+   ::
+
+    ---
+    - &anchor
+      foo: bar
+    - *unknown
+
+   the following code snippet would **FAIL**:
+   ::
+
+    ---
+    - &anchor
+      foo: bar
+    - <<: *unknown
+      extra: value
+
+#. With ``anchors: {forbid-duplicated-anchors: true}``
+
+   the following code snippet would **PASS**:
+   ::
+
+    ---
+    - &anchor1 Foo Bar
+    - &anchor2 [item 1, item 2]
+
+   the following code snippet would **FAIL**:
+   ::
+
+    ---
+    - &anchor Foo Bar
+    - &anchor [item 1, item 2]
+
+#. With ``anchors: {forbid-unused-anchors: true}``
+
+   the following code snippet would **PASS**:
+   ::
+
+    ---
+    - &anchor
+      foo: bar
+    - *anchor
+
+   the following code snippet would **FAIL**:
+   ::
+
+    ---
+    - &anchor
+      foo: bar
+    - items:
+      - item1
+      - item2
+"""
+
+
+import yaml
+
+from yamllint.linter import LintProblem
+
+
+ID = 'anchors'
+TYPE = 'token'
+CONF = {'forbid-undeclared-aliases': bool,
+        'forbid-duplicated-anchors': bool,
+        'forbid-unused-anchors': bool}
+DEFAULT = {'forbid-undeclared-aliases': True,
+           'forbid-duplicated-anchors': False,
+           'forbid-unused-anchors': False}
+
+
+def check(conf, token, prev, next, nextnext, context):
+    if (conf['forbid-undeclared-aliases'] or
+            conf['forbid-duplicated-anchors'] or
+            conf['forbid-unused-anchors']):
+        if isinstance(token, (
+                yaml.StreamStartToken,
+                yaml.DocumentStartToken,
+                yaml.DocumentEndToken)):
+            context['anchors'] = {}
+
+    if (conf['forbid-undeclared-aliases'] and
+            isinstance(token, yaml.AliasToken) and
+            token.value not in context['anchors']):
+        yield LintProblem(
+            token.start_mark.line + 1, token.start_mark.column + 1,
+            f'found undeclared alias "{token.value}"')
+
+    if (conf['forbid-duplicated-anchors'] and
+            isinstance(token, yaml.AnchorToken) and
+            token.value in context['anchors']):
+        yield LintProblem(
+            token.start_mark.line + 1, token.start_mark.column + 1,
+            f'found duplicated anchor "{token.value}"')
+
+    if conf['forbid-unused-anchors']:
+        # Unused anchors can only be detected at the end of Document.
+        # End of document can be either
+        #   - end of stream
+        #   - end of document sign '...'
+        #   - start of a new document sign '---'
+        # If next token indicates end of document,
+        # check if the anchors have been used or not.
+        # If they haven't been used, report problem on those anchors.
+        if isinstance(next, (yaml.StreamEndToken,
+                             yaml.DocumentStartToken,
+                             yaml.DocumentEndToken)):
+            for anchor, info in context['anchors'].items():
+                if not info['used']:
+                    yield LintProblem(info['line'] + 1,
+                                      info['column'] + 1,
+                                      f'found unused anchor "{anchor}"')
+        elif isinstance(token, yaml.AliasToken):
+            context['anchors'].get(token.value, {})['used'] = True
+
+    if (conf['forbid-undeclared-aliases'] or
+            conf['forbid-duplicated-anchors'] or
+            conf['forbid-unused-anchors']):
+        if isinstance(token, yaml.AnchorToken):
+            context['anchors'][token.value] = {
+                'line': token.start_mark.line,
+                'column': token.start_mark.column,
+                'used': False
+            }

yamllint/rules/braces.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -22,7 +21,8 @@ braces (``{`` and ``}``).
 
 * ``forbid`` is used to forbid the use of flow mappings which are denoted by
   surrounding braces (``{`` and ``}``). Use ``true`` to forbid the use of flow
-  mappings completely.
+  mappings completely. Use ``non-empty`` to forbid the use of all flow
+  mappings except for empty ones.
 * ``min-spaces-inside`` defines the minimal number of spaces required inside
   braces.
 * ``max-spaces-inside`` defines the maximal number of spaces allowed inside
@@ -60,6 +60,18 @@ braces (``{`` and ``}``).
 
     object: { key1: 4, key2: 8 }
 
+#. With ``braces: {forbid: non-empty}``
+
+   the following code snippet would **PASS**:
+   ::
+
+    object: {}
+
+   the following code snippet would **FAIL**:
+   ::
+
+    object: { key1: 4, key2: 8 }
+
 #. With ``braces: {min-spaces-inside: 0, max-spaces-inside: 0}``
 
    the following code snippet would **PASS**:
@@ -128,7 +140,7 @@ from yamllint.rules.common import spaces_after, spaces_before
 
 ID = 'braces'
 TYPE = 'token'
-CONF = {'forbid': bool,
+CONF = {'forbid': (bool, 'non-empty'),
         'min-spaces-inside': int,
         'max-spaces-inside': int,
         'min-spaces-inside-empty': int,
@@ -141,7 +153,15 @@ DEFAULT = {'forbid': False,
 
 
 def check(conf, token, prev, next, nextnext, context):
-    if conf['forbid'] and isinstance(token, yaml.FlowMappingStartToken):
+    if (conf['forbid'] is True and
+            isinstance(token, yaml.FlowMappingStartToken)):
+        yield LintProblem(token.start_mark.line + 1,
+                          token.end_mark.column + 1,
+                          'forbidden flow mapping')
+
+    elif (conf['forbid'] == 'non-empty' and
+            isinstance(token, yaml.FlowMappingStartToken) and
+            not isinstance(next, yaml.FlowMappingEndToken)):
         yield LintProblem(token.start_mark.line + 1,
                           token.end_mark.column + 1,
                           'forbidden flow mapping')

yamllint/rules/brackets.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -22,7 +21,8 @@ inside brackets (``[`` and ``]``).
 
 * ``forbid`` is used to forbid the use of flow sequences which are denoted by
   surrounding brackets (``[`` and ``]``). Use ``true`` to forbid the use of
-  flow sequences completely.
+  flow sequences completely. Use ``non-empty`` to forbid the use of all flow
+  sequences except for empty ones.
 * ``min-spaces-inside`` defines the minimal number of spaces required inside
   brackets.
 * ``max-spaces-inside`` defines the maximal number of spaces allowed inside
@@ -61,6 +61,18 @@ inside brackets (``[`` and ``]``).
 
     object: [ 1, 2, abc ]
 
+#. With ``brackets: {forbid: non-empty}``
+
+   the following code snippet would **PASS**:
+   ::
+
+    object: []
+
+   the following code snippet would **FAIL**:
+   ::
+
+    object: [ 1, 2, abc ]
+
 #. With ``brackets: {min-spaces-inside: 0, max-spaces-inside: 0}``
 
    the following code snippet would **PASS**:
@@ -129,7 +141,7 @@ from yamllint.rules.common import spaces_after, spaces_before
 
 ID = 'brackets'
 TYPE = 'token'
-CONF = {'forbid': bool,
+CONF = {'forbid': (bool, 'non-empty'),
         'min-spaces-inside': int,
         'max-spaces-inside': int,
         'min-spaces-inside-empty': int,
@@ -142,7 +154,15 @@ DEFAULT = {'forbid': False,
 
 
 def check(conf, token, prev, next, nextnext, context):
-    if conf['forbid'] and isinstance(token, yaml.FlowSequenceStartToken):
+    if (conf['forbid'] is True and
+            isinstance(token, yaml.FlowSequenceStartToken)):
+        yield LintProblem(token.start_mark.line + 1,
+                          token.end_mark.column + 1,
+                          'forbidden flow sequence')
+
+    elif (conf['forbid'] == 'non-empty' and
+            isinstance(token, yaml.FlowSequenceStartToken) and
+            not isinstance(next, yaml.FlowSequenceEndToken)):
         yield LintProblem(token.start_mark.line + 1,
                           token.end_mark.column + 1,
                           'forbidden flow sequence')

yamllint/rules/colons.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -93,7 +92,9 @@ DEFAULT = {'max-spaces-before': 0,
 
 
 def check(conf, token, prev, next, nextnext, context):
-    if isinstance(token, yaml.ValueToken):
+    if isinstance(token, yaml.ValueToken) and not (
+            isinstance(prev, yaml.AliasToken) and
+            token.start_mark.pointer - prev.end_mark.pointer == 1):
         problem = spaces_before(token, prev, next,
                                 max=conf['max-spaces-before'],
                                 max_desc='too many spaces before colon')

yamllint/rules/commas.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

yamllint/rules/comments.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -74,8 +73,6 @@ Use this rule to control the position and formatting of comments.
 """
 
 
-import re
-
 from yamllint.linter import LintProblem
 
 
@@ -105,7 +102,7 @@ def check(conf, comment):
             if (conf['ignore-shebangs'] and
                     comment.line_no == 1 and
                     comment.column_no == 1 and
-                    re.match(r'^!\S', comment.buffer[text_start:])):
+                    comment.buffer[text_start] == '!'):
                 return
             # We can test for both \r and \r\n just by checking first char
             # \r itself is a valid newline on some older OS.

yamllint/rules/comments_indentation.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -118,8 +117,7 @@ def check(conf, comment):
     #         # comment
     #         - 1
     #         - 2
-    if prev_line_indent <= next_line_indent:
-        prev_line_indent = next_line_indent
+    prev_line_indent = max(prev_line_indent, next_line_indent)
 
     # If two indents are valid but a previous comment went back to normal
     # indent, for the next ones to do the same. In other words, avoid this:

yamllint/rules/common.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

yamllint/rules/document_end.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -100,11 +99,13 @@ def check(conf, token, prev, next, nextnext, context):
         prev_is_end_or_stream_start = isinstance(
             prev, (yaml.DocumentEndToken, yaml.StreamStartToken)
         )
+        prev_is_directive = isinstance(prev, yaml.DirectiveToken)
 
         if is_stream_end and not prev_is_end_or_stream_start:
             yield LintProblem(token.start_mark.line, 1,
                               'missing document end "..."')
-        elif is_start and not prev_is_end_or_stream_start:
+        elif is_start and not (prev_is_end_or_stream_start
+                               or prev_is_directive):
             yield LintProblem(token.start_mark.line + 1, 1,
                               'missing document end "..."')
 

yamllint/rules/document_start.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

yamllint/rules/empty_lines.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

yamllint/rules/empty_values.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2017 Greg Dubicki
 #
 # This program is free software: you can redistribute it and/or modify

yamllint/rules/float_values.py

@@ -0,0 +1,158 @@
+# Copyright (C) 2022 the yamllint contributors
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+Use this rule to limit the permitted values for floating-point numbers.
+YAML permits three classes of float expressions: approximation to real numbers,
+positive and negative infinity and "not a number".
+
+.. rubric:: Options
+
+* Use ``require-numeral-before-decimal`` to require floats to start
+  with a numeral (ex ``0.0`` instead of ``.0``).
+* Use ``forbid-scientific-notation`` to forbid scientific notation.
+* Use ``forbid-nan`` to forbid NaN (not a number) values.
+* Use ``forbid-inf`` to forbid infinite values.
+
+.. rubric:: Default values (when enabled)
+
+.. code-block:: yaml
+
+    rules:
+      float-values:
+        forbid-inf: false
+        forbid-nan: false
+        forbid-scientific-notation: false
+        require-numeral-before-decimal: false
+
+.. rubric:: Examples
+
+#. With ``float-values: {require-numeral-before-decimal: true}``
+
+   the following code snippets would **PASS**:
+   ::
+
+    anemometer:
+      angle: 0.0
+
+   the following code snippets would **FAIL**:
+   ::
+
+    anemometer:
+      angle: .0
+
+#. With ``float-values: {forbid-scientific-notation: true}``
+
+   the following code snippets would **PASS**:
+   ::
+
+    anemometer:
+      angle: 0.00001
+
+   the following code snippets would **FAIL**:
+   ::
+
+    anemometer:
+      angle: 10e-6
+
+#. With ``float-values: {forbid-nan: true}``
+
+   the following code snippets would **FAIL**:
+   ::
+
+    anemometer:
+      angle: .NaN
+
+ #. With ``float-values: {forbid-inf: true}``
+
+   the following code snippets would **FAIL**:
+   ::
+
+    anemometer:
+      angle: .inf
+"""
+
+import re
+
+import yaml
+
+from yamllint.linter import LintProblem
+
+
+ID = 'float-values'
+TYPE = 'token'
+CONF = {
+    'require-numeral-before-decimal': bool,
+    'forbid-scientific-notation': bool,
+    'forbid-nan': bool,
+    'forbid-inf': bool,
+}
+DEFAULT = {
+    'require-numeral-before-decimal': False,
+    'forbid-scientific-notation': False,
+    'forbid-nan': False,
+    'forbid-inf': False,
+}
+
+IS_NUMERAL_BEFORE_DECIMAL_PATTERN = (
+    re.compile('[-+]?(\\.[0-9]+)([eE][-+]?[0-9]+)?$')
+)
+IS_SCIENTIFIC_NOTATION_PATTERN = re.compile(
+    '[-+]?(\\.[0-9]+|[0-9]+(\\.[0-9]*)?)([eE][-+]?[0-9]+)$'
+)
+IS_INF_PATTERN = re.compile('[-+]?(\\.inf|\\.Inf|\\.INF)$')
+IS_NAN_PATTERN = re.compile('(\\.nan|\\.NaN|\\.NAN)$')
+
+
+def check(conf, token, prev, next, nextnext, context):
+    if prev and isinstance(prev, yaml.tokens.TagToken):
+        return
+    if not isinstance(token, yaml.tokens.ScalarToken):
+        return
+    if token.style:
+        return
+    val = token.value
+
+    if conf['forbid-nan'] and IS_NAN_PATTERN.match(val):
+        yield LintProblem(
+            token.start_mark.line + 1,
+            token.start_mark.column + 1,
+            f'forbidden not a number value "{token.value}"',
+        )
+
+    if conf['forbid-inf'] and IS_INF_PATTERN.match(val):
+        yield LintProblem(
+            token.start_mark.line + 1,
+            token.start_mark.column + 1,
+            f'forbidden infinite value "{token.value}"',
+        )
+
+    if conf[
+        'forbid-scientific-notation'
+    ] and IS_SCIENTIFIC_NOTATION_PATTERN.match(val):
+        yield LintProblem(
+            token.start_mark.line + 1,
+            token.start_mark.column + 1,
+            f'forbidden scientific notation "{token.value}"',
+        )
+
+    if conf[
+        'require-numeral-before-decimal'
+    ] and IS_NUMERAL_BEFORE_DECIMAL_PATTERN.match(val):
+        yield LintProblem(
+            token.start_mark.line + 1,
+            token.start_mark.column + 1,
+            f'forbidden decimal missing 0 prefix "{token.value}"',
+        )

yamllint/rules/hyphens.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

yamllint/rules/indentation.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -219,7 +218,7 @@ ROOT, B_MAP, F_MAP, B_SEQ, F_SEQ, B_ENT, KEY, VAL = range(8)
 labels = ('ROOT', 'B_MAP', 'F_MAP', 'B_SEQ', 'F_SEQ', 'B_ENT', 'KEY', 'VAL')
 
 
-class Parent(object):
+class Parent:
     def __init__(self, type, indent, line_indent=None):
         self.type = type
         self.indent = indent
@@ -342,14 +341,18 @@ def _check(conf, token, prev, next, nextnext, context):
             expected = detect_indent(expected, token)
 
         if found_indentation != expected:
-            yield LintProblem(token.start_mark.line + 1, found_indentation + 1,
-                              'wrong indentation: expected %d but found %d' %
-                              (expected, found_indentation))
+            if expected < 0:
+                message = 'wrong indentation: expected at least %d' % \
+                          (found_indentation + 1)
+            else:
+                message = 'wrong indentation: expected %d but found %d' % \
+                          (expected, found_indentation)
+            yield LintProblem(token.start_mark.line + 1,
+                              found_indentation + 1, message)
 
     if (isinstance(token, yaml.ScalarToken) and
             conf['check-multi-line-strings']):
-        for problem in check_scalar_indentation(conf, token, context):
-            yield problem
+        yield from check_scalar_indentation(conf, token, context)
 
     # Step 2.a:
 
@@ -494,8 +497,8 @@ def _check(conf, token, prev, next, nextnext, context):
                         # indentation it should have (because `spaces` is
                         # `consistent` and its value has not been computed yet
                         # -- this is probably the beginning of the document).
-                        # So we choose an arbitrary value (2).
-                        indent = 2
+                        # So we choose an unknown value (-1).
+                        indent = -1
                     else:
                         indent = detect_indent(context['stack'][-1].indent,
                                                next)
@@ -577,8 +580,7 @@ def _check(conf, token, prev, next, nextnext, context):
 
 def check(conf, token, prev, next, nextnext, context):
     try:
-        for problem in _check(conf, token, prev, next, nextnext, context):
-            yield problem
+        yield from _check(conf, token, prev, next, nextnext, context)
     except AssertionError:
         yield LintProblem(token.start_mark.line + 1,
                           token.start_mark.column + 1,

yamllint/rules/key_duplicates.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -65,7 +64,7 @@ TYPE = 'token'
 MAP, SEQ = range(2)
 
 
-class Parent(object):
+class Parent:
     def __init__(self, type):
         self.type = type
         self.keys = []
@@ -84,7 +83,8 @@ def check(conf, token, prev, next, nextnext, context):
     elif isinstance(token, (yaml.BlockEndToken,
                             yaml.FlowMappingEndToken,
                             yaml.FlowSequenceEndToken)):
-        context['stack'].pop()
+        if len(context['stack']) > 0:
+            context['stack'].pop()
     elif (isinstance(token, yaml.KeyToken) and
           isinstance(next, yaml.ScalarToken)):
         # This check is done because KeyTokens can be found inside flow

yamllint/rules/key_ordering.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2017 Johannes F. Knauf
 #
 # This program is free software: you can redistribute it and/or modify
@@ -18,8 +17,8 @@
 Use this rule to enforce alphabetical ordering of keys in mappings. The sorting
 order uses the Unicode code point number as a default. As a result, the
 ordering is case-sensitive and not accent-friendly (see examples below).
-This can be changed by setting the global ``locale`` option.  This allows to
-sort case and accents properly.
+This can be changed by setting the global ``locale`` option.  This allows one
+to sort case and accents properly.
 
 .. rubric:: Examples
 
@@ -94,7 +93,7 @@ TYPE = 'token'
 MAP, SEQ = range(2)
 
 
-class Parent(object):
+class Parent:
     def __init__(self, type):
         self.type = type
         self.keys = []

yamllint/rules/line_length.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -17,10 +16,6 @@
 """
 Use this rule to set a limit to lines length.
 
-Note: with Python 2, the ``line-length`` rule may not work properly with
-unicode characters because of the way strings are represented in bytes. We
-recommend running yamllint with Python 3.
-
 .. rubric:: Options
 
 * ``max`` defines the maximal (inclusive) length of lines.
@@ -144,7 +139,11 @@ def check(conf, line):
                 start += 1
 
             if start != line.end:
-                if line.buffer[start] in ('#', '-'):
+                if line.buffer[start] == '#':
+                    while line.buffer[start] == '#':
+                        start += 1
+                    start += 1
+                elif line.buffer[start] == '-':
                     start += 2
 
                 if line.buffer.find(' ', start, line.end) == -1:

yamllint/rules/new_line_at_end_of_file.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -18,7 +17,7 @@
 Use this rule to require a new line character (``\\n``) at the end of files.
 
 The POSIX standard `requires the last line to end with a new line character
-<http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_206>`_.
+<https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_206>`_.
 All UNIX tools expect a new line at the end of files. Most text editors use
 this convention too.
 """

yamllint/rules/new_lines.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify
@@ -19,8 +18,11 @@ Use this rule to force the type of new line characters.
 
 .. rubric:: Options
 
-* Set ``type`` to ``unix`` to use UNIX-typed new line characters (``\\n``), or
-  ``dos`` to use DOS-typed new line characters (``\\r\\n``).
+* Set ``type`` to ``unix`` to enforce UNIX-typed new line characters (``\\n``),
+  set ``type`` to ``dos`` to enforce DOS-typed new line characters
+  (``\\r\\n``), or set ``type`` to ``platform`` to infer the type from the
+  system running yamllint (``\\n`` on POSIX / UNIX / Linux / Mac OS systems or
+  ``\\r\\n`` on DOS / Windows systems).
 
 .. rubric:: Default values (when enabled)
 
@@ -31,24 +33,27 @@ Use this rule to force the type of new line characters.
      type: unix
 """
 
+from os import linesep
 
 from yamllint.linter import LintProblem
 
 
 ID = 'new-lines'
 TYPE = 'line'
-CONF = {'type': ('unix', 'dos')}
+CONF = {'type': ('unix', 'dos', 'platform')}
 DEFAULT = {'type': 'unix'}
 
 
 def check(conf, line):
+    if conf['type'] == 'unix':
+        newline_char = '\n'
+    elif conf['type'] == 'platform':
+        newline_char = linesep
+    elif conf['type'] == 'dos':
+        newline_char = '\r\n'
+
     if line.start == 0 and len(line.buffer) > line.end:
-        if conf['type'] == 'dos':
-            if (line.end + 2 > len(line.buffer) or
-                    line.buffer[line.end:line.end + 2] != '\r\n'):
-                yield LintProblem(1, line.end - line.start + 1,
-                                  'wrong new line character: expected \\r\\n')
-        else:
-            if line.buffer[line.end] == '\r':
-                yield LintProblem(1, line.end - line.start + 1,
-                                  'wrong new line character: expected \\n')
+        if line.buffer[line.end:line.end + len(newline_char)] != newline_char:
+            yield LintProblem(1, line.end - line.start + 1,
+                              'wrong new line character: expected {}'
+                              .format(repr(newline_char).strip('\'')))

yamllint/rules/octal_values.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2017 ScienJus
 #
 # This program is free software: you can redistribute it and/or modify
@@ -85,9 +84,7 @@ CONF = {'forbid-implicit-octal': bool,
 DEFAULT = {'forbid-implicit-octal': True,
            'forbid-explicit-octal': True}
 
-
-def _is_octal_number(string):
-    return re.match(r'^[0-7]+$', string) is not None
+IS_OCTAL_NUMBER_PATTERN = re.compile(r'^[0-7]+$')
 
 
 def check(conf, token, prev, next, nextnext, context):
@@ -99,7 +96,7 @@ def check(conf, token, prev, next, nextnext, context):
             if not token.style:
                 val = token.value
                 if (val.isdigit() and len(val) > 1 and val[0] == '0' and
-                        _is_octal_number(val[1:])):
+                        IS_OCTAL_NUMBER_PATTERN.match(val[1:])):
                     yield LintProblem(
                         token.start_mark.line + 1, token.end_mark.column + 1,
                         'forbidden implicit octal value "%s"' %
@@ -110,7 +107,7 @@ def check(conf, token, prev, next, nextnext, context):
             if not token.style:
                 val = token.value
                 if (len(val) > 2 and val[:2] == '0o' and
-                        _is_octal_number(val[2:])):
+                        IS_OCTAL_NUMBER_PATTERN.match(val[2:])):
                     yield LintProblem(
                         token.start_mark.line + 1, token.end_mark.column + 1,
                         'forbidden explicit octal value "%s"' %

yamllint/rules/quoted_strings.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2018 ClearScore
 #
 # This program is free software: you can redistribute it and/or modify
@@ -31,6 +30,8 @@ used.
   ``required: false`` and  ``required: only-when-needed``.
 * ``extra-allowed`` is a list of PCRE regexes to allow quoted string values,
   even if ``required: only-when-needed`` is set.
+* ``allow-quoted-quotes`` allows (``true``) using disallowed quotes for strings
+  with allowed quotes inside. Default ``false``.
 
 **Note**: Multi-line strings (with ``|`` or ``>``) will not be checked.
 
@@ -44,6 +45,7 @@ used.
      required: true
      extra-required: []
      extra-allowed: []
+     allow-quoted-quotes: false
 
 .. rubric:: Examples
 
@@ -113,6 +115,26 @@ used.
 
     - "localhost"
     - this is a string that needs to be QUOTED
+
+#. With ``quoted-strings: {quote-type: double, allow-quoted-quotes: false}``
+
+   the following code snippet would **PASS**:
+   ::
+
+    foo: "bar\\"baz"
+
+   the following code snippet would **FAIL**:
+   ::
+
+    foo: 'bar"baz'
+
+#. With ``quoted-strings: {quote-type: double, allow-quoted-quotes: true}``
+
+   the following code snippet would **PASS**:
+   ::
+
+    foo: 'bar"baz'
+
 """
 
 import re
@@ -126,11 +148,13 @@ TYPE = 'token'
 CONF = {'quote-type': ('any', 'single', 'double'),
         'required': (True, False, 'only-when-needed'),
         'extra-required': [str],
-        'extra-allowed': [str]}
+        'extra-allowed': [str],
+        'allow-quoted-quotes': bool}
 DEFAULT = {'quote-type': 'any',
            'required': True,
            'extra-required': [],
-           'extra-allowed': []}
+           'extra-allowed': [],
+           'allow-quoted-quotes': False}
 
 
 def VALIDATE(conf):
@@ -142,7 +166,18 @@ def VALIDATE(conf):
         return 'cannot use both "required: false" and "extra-allowed"'
 
 
-DEFAULT_SCALAR_TAG = u'tag:yaml.org,2002:str'
+DEFAULT_SCALAR_TAG = 'tag:yaml.org,2002:str'
+
+# https://stackoverflow.com/a/36514274
+yaml.resolver.Resolver.add_implicit_resolver(
+    'tag:yaml.org,2002:int',
+    re.compile(r'''^(?:[-+]?0b[0-1_]+
+               |[-+]?0o?[0-7_]+
+               |[-+]?0[0-7_]+
+               |[-+]?(?:0|[1-9][0-9_]*)
+               |[-+]?0x[0-9a-fA-F_]+
+               |[-+]?[1-9][0-9_]*(?::[0-5]?[0-9])+)$''', re.X),
+    list('-+0123456789'))
 
 
 def _quote_match(quote_type, token_style):
@@ -167,6 +202,12 @@ def _quotes_are_needed(string):
         return True
 
 
+def _has_quoted_quotes(token):
+    return ((not token.plain) and
+            ((token.style == "'" and '"' in token.value) or
+             (token.style == '"' and "'" in token.value)))
+
+
 def check(conf, token, prev, next, nextnext, context):
     if not (isinstance(token, yaml.tokens.ScalarToken) and
             isinstance(prev, (yaml.BlockEntryToken, yaml.FlowEntryToken,
@@ -187,7 +228,7 @@ def check(conf, token, prev, next, nextnext, context):
         return
 
     # Ignore multi-line strings
-    if (not token.plain) and (token.style == "|" or token.style == ">"):
+    if not token.plain and token.style in ("|", ">"):
         return
 
     quote_type = conf['quote-type']
@@ -196,13 +237,18 @@ def check(conf, token, prev, next, nextnext, context):
     if conf['required'] is True:
 
         # Quotes are mandatory and need to match config
-        if token.style is None or not _quote_match(quote_type, token.style):
+        if (token.style is None or
+            not (_quote_match(quote_type, token.style) or
+                 (conf['allow-quoted-quotes'] and _has_quoted_quotes(token)))):
             msg = "string value is not quoted with %s quotes" % quote_type
 
     elif conf['required'] is False:
 
         # Quotes are not mandatory but when used need to match config
-        if token.style and not _quote_match(quote_type, token.style):
+        if (token.style and
+                not _quote_match(quote_type, token.style) and
+                not (conf['allow-quoted-quotes'] and
+                     _has_quoted_quotes(token))):
             msg = "string value is not quoted with %s quotes" % quote_type
 
         elif not token.style:
@@ -225,7 +271,9 @@ def check(conf, token, prev, next, nextnext, context):
                     quote_type)
 
         # But when used need to match config
-        elif token.style and not _quote_match(quote_type, token.style):
+        elif (token.style and
+              not _quote_match(quote_type, token.style) and
+              not (conf['allow-quoted-quotes'] and _has_quoted_quotes(token))):
             msg = "string value is not quoted with %s quotes" % quote_type
 
         elif not token.style:

yamllint/rules/trailing_spaces.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Adrien Vergé
 #
 # This program is free software: you can redistribute it and/or modify

yamllint/rules/truthy.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 Peter Ericson
 #
 # This program is free software: you can redistribute it and/or modify
@@ -15,7 +14,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
-Use this rule to forbid non-explictly typed truthy values other than allowed
+Use this rule to forbid non-explicitly typed truthy values other than allowed
 ones (by default: ``true`` and ``false``), for example ``YES`` or ``off``.
 
 This can be useful to prevent surprises from YAML parsers transforming