Use io.open() when reading files in cli which has the same behaviour
in Python 2 and Python 3, and supply the newline='' parameter which
handles but does not translate line endings.
Add dos.yml test file with windows newlines.
Also add to file finding test expected output.
Add test for new-lines rule through the cli.
Validates files are read with the correct universal newlines setting.
Fixesadrienverge/yamllint#228
Single context manager that includes exit code and output streams.
Use new RunContext throughout test_cli.
Largely non-functional change, saving some repetition of setup.
Also improve some failures by bundling multiple assertions into one.
`-f standard` shows non-colored output,
`-f colored` shows colored output,
`-f auto` is the new default, it chooses `standard` or `colored`
depending on terminal capabilities.
Some operating systems don't have the `C.UTF-8` locale installed yet
(for instance, CentOS 7). In such a case, fallback to `en_US.UTF-8` so
that tests can be run.
This follows commit 92ff315.
When piping yamllint output to a file, "coloured" characters aren't
interpreted and pollute text formatting with glyphs like:
�[4m./global.yaml�[0m
�[2m1439:52�[0m �[31merror�[0m no new line character...
With this commit, stdout is checked: if it's a TTY then output is
coloured, otherwise output is simple text.
Closes: #14