Rules: indentation: Rewrite algorithm

tests/rules/test_colons.py

@@ -41,7 +41,7 @@ class ColonTestCase(RuleTestCase):
                    '    - o: {k1: v1}\n'
                    '    - p: kdjf\n'
                    '    - q: val0\n'
-                   '      q2:\n'
+                   '    - q2:\n'
                    '      - val1\n'
                    '...\n', conf)
         self.check('---\n'
@@ -66,7 +66,7 @@ class ColonTestCase(RuleTestCase):
                    '        val\n'
                    '    - o: {k1: v1}\n'
                    '    - o:  {k1: v1}\n'
-                   '      q2:\n'
+                   '    - q2:\n'
                    '      - val1\n'
                    '...\n', conf)
         self.check('---\n'

tests/rules/test_indentation.py

@@ -118,7 +118,7 @@ class IndentationTestCase(RuleTestCase):
         self.check('---\n'
                    ' object:\n'
                    '     val: 1\n'
-                   '...\n', conf, problem=(2, 2))
+                   '...\n', conf, problem1=(2, 2), problem2=(3, 6))
         self.check('---\n'
                    '- el1\n'
                    '- el2:\n'
@@ -133,7 +133,8 @@ class IndentationTestCase(RuleTestCase):
                    '  - el1\n'
                    '  - el2:\n'
                    '    - subel\n'
-                   '...\n', conf, problem1=(2, 3), problem2=(4, 7))
+                   '...\n', conf,
+                   problem1=(2, 3), problem2=(3, 3), problem3=(4, 5))
 
     def test_multi_lines(self):
         self.check('---\n'
@@ -154,18 +155,32 @@ class IndentationTestCase(RuleTestCase):
                    '...\n', None)
 
     def test_nested_collections(self):
+        conf = 'indentation: {spaces: 2}'
         self.check('---\n'
                    '- o:\n'
                    '  k1: v1\n'
-                   '...\n', None)
+                   '...\n', conf)
+        self.check('---\n'
+                   '- o:\n'
+                   ' k1: v1\n'
+                   '...\n', conf, problem=(3, 2))
+        self.check('---\n'
+                   '- o:\n'
+                   '   k1: v1\n'
+                   '...\n', conf, problem=(3, 4))
+        conf = 'indentation: {spaces: 4}'
+        self.check('---\n'
+                   '- o:\n'
+                   '    k1: v1\n'
+                   '...\n', conf)
         self.check('---\n'
                    '- o:\n'
                    '   k1: v1\n'
-                   '...\n', None, problem=(3, 4))
+                   '...\n', conf, problem=(3, 4))
         self.check('---\n'
                    '- o:\n'
                    '     k1: v1\n'
-                   '...\n', None, problem=(3, 6))
+                   '...\n', conf, problem=(3, 6))
 
     def test_return(self):
         self.check('---\n'
@@ -189,3 +204,23 @@ class IndentationTestCase(RuleTestCase):
         #            '    c:\n'
         #            ' d:\n'
         #            '...\n', None, problem=(5, 2))
+
+    def test_first_line(self):
+        conf = ('indentation: {spaces: 2}\n'
+                'document-start: disable\n')
+        self.check('  a: 1\n', conf, problem=(1, 3))
+
+    def test_broken_inline_flows(self):
+        conf = 'indentation: {spaces: 2}'
+        self.check('---\n'
+                   'obj: {\n'
+                   '  a: 1,\n'
+                   '   b: 2,\n'
+                   ' c: 3\n'
+                   '}\n', conf, problem1=(4, 4), problem2=(5, 2))
+        self.check('---\n'
+                   'list: [\n'
+                   '  1,\n'
+                   '   2,\n'
+                   ' 3\n'
+                   ']\n', conf, problem1=(4, 4), problem2=(5, 2))

yamllint/rules/indentation.py

@@ -25,39 +25,46 @@ CONF = {'spaces': int}
 
 
 def check(conf, token, prev, next):
-    if isinstance(token, yaml.StreamEndToken):
+    if isinstance(token, (yaml.StreamStartToken, yaml.StreamEndToken)):
         return
 
-    if (prev is None or isinstance(prev, yaml.StreamStartToken) or
-            isinstance(prev, yaml.DirectiveToken) or
-            isinstance(prev, yaml.DocumentStartToken)):
-        if token.start_mark.column != 0:
+    # Check if first token in line
+    if (not isinstance(prev, (yaml.StreamStartToken, yaml.DirectiveToken)) and
+            token.start_mark.line == prev.end_mark.line):
+        return
+
+    if token.start_mark.column % conf['spaces'] != 0:
         yield LintProblem(
             token.end_mark.line + 1, token.start_mark.column + 1,
-                'found indentation of %d instead of %d' %
-                (token.start_mark.column, 0))
+            'indentation is not a multiple of %d' % conf['spaces'])
         return
 
-    if token.start_mark.line > prev.end_mark.line:
+    if isinstance(prev, (yaml.StreamStartToken,
+                         yaml.DirectiveToken,
+                         yaml.DocumentStartToken,
+                         yaml.DocumentEndToken)):
+        indent = 0
+    else:
         buffer = prev.end_mark.buffer
-
         start = buffer.rfind('\n', 0, prev.end_mark.pointer) + 1
-        prev_indent = 0
 
-        # YAML recognizes two white space characters: space and tab.
-        # http://yaml.org/spec/1.2/spec.html#id2775170
-        while buffer[start + prev_indent] in ' \t':
-            prev_indent += 1
+        indent = 0
+        while buffer[start + indent] == ' ':
+            indent += 1
 
-        # Discard any leading '- '
-        if (buffer[start + prev_indent:start + prev_indent + 2] == '- '):
-            prev_indent += 2
-            while buffer[start + prev_indent] in ' \t':
-                prev_indent += 1
+    if token.start_mark.column > indent:
+        if not isinstance(prev, (yaml.BlockSequenceStartToken,
+                                 yaml.BlockMappingStartToken,
+                                 yaml.FlowSequenceStartToken,
+                                 yaml.FlowMappingStartToken,
+                                 yaml.KeyToken,
+                                 yaml.ValueToken)):
+            yield LintProblem(
+                token.end_mark.line + 1, token.start_mark.column + 1,
+                'unexpected indentation')
 
-        if (token.start_mark.column > prev_indent and
-                token.start_mark.column != prev_indent + conf['spaces']):
+        elif token.start_mark.column != indent + conf['spaces']:
             yield LintProblem(
                 token.end_mark.line + 1, token.start_mark.column + 1,
                 'found indentation of %d instead of %d' %
-                (token.start_mark.column, prev_indent + conf['spaces']))
+                (token.start_mark.column, indent + conf['spaces']))