intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 164 insertions, 0 deletions

diff --git a/contrib/python/Pygments/py3/pygments/lexers/diff.py b/contrib/python/Pygments/py3/pygments/lexers/diff.py
new file mode 100644
index 0000000000..a694bd68e6
--- /dev/null
+++ b/contrib/python/Pygments/py3/pygments/lexers/diff.py
@@ -0,0 +1,164 @@
+"""
+    pygments.lexers.diff
+    ~~~~~~~~~~~~~~~~~~~~
+
+    Lexers for diff/patch formats.
+
+    :copyright: Copyright 2006-2021 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+
+from pygments.lexer import RegexLexer, include, bygroups
+from pygments.token import Text, Comment, Operator, Keyword, Name, Generic, \
+    Literal, Whitespace
+
+__all__ = ['DiffLexer', 'DarcsPatchLexer', 'WDiffLexer']
+
+
+class DiffLexer(RegexLexer):
+    """
+    Lexer for unified or context-style diffs or patches.
+    """
+
+    name = 'Diff'
+    aliases = ['diff', 'udiff']
+    filenames = ['*.diff', '*.patch']
+    mimetypes = ['text/x-diff', 'text/x-patch']
+
+    tokens = {
+        'root': [
+            (r'( )(.*)(\n)', bygroups(Whitespace, Text, Whitespace)),
+            (r'(\+.*)(\n)', bygroups(Generic.Inserted, Whitespace)),
+            (r'(-.*)(\n)', bygroups(Generic.Deleted, Whitespace)),
+            (r'(!.*)(\n)', bygroups(Generic.Strong, Whitespace)),
+            (r'(@.*)(\n)', bygroups(Generic.Subheading, Whitespace)),
+            (r'((?:[Ii]ndex|diff).*)(\n)', bygroups(Generic.Heading, Whitespace)),
+            (r'(=.*)(\n)', bygroups(Generic.Heading, Whitespace)),
+            (r'(.*)(\n)', Whitespace),
+        ]
+    }
+
+    def analyse_text(text):
+        if text[:7] == 'Index: ':
+            return True
+        if text[:5] == 'diff ':
+            return True
+        if text[:4] == '--- ':
+            return 0.9
+
+
+class DarcsPatchLexer(RegexLexer):
+    """
+    DarcsPatchLexer is a lexer for the various versions of the darcs patch
+    format.  Examples of this format are derived by commands such as
+    ``darcs annotate --patch`` and ``darcs send``.
+
+    .. versionadded:: 0.10
+    """
+
+    name = 'Darcs Patch'
+    aliases = ['dpatch']
+    filenames = ['*.dpatch', '*.darcspatch']
+
+    DPATCH_KEYWORDS = ('hunk', 'addfile', 'adddir', 'rmfile', 'rmdir', 'move',
+                       'replace')
+
+    tokens = {
+        'root': [
+            (r'<', Operator),
+            (r'>', Operator),
+            (r'\{', Operator),
+            (r'\}', Operator),
+            (r'(\[)((?:TAG )?)(.*)(\n)(.*)(\*\*)(\d+)(\s?)(\])',
+             bygroups(Operator, Keyword, Name, Whitespace, Name, Operator,
+                      Literal.Date, Whitespace, Operator)),
+            (r'(\[)((?:TAG )?)(.*)(\n)(.*)(\*\*)(\d+)(\s?)',
+             bygroups(Operator, Keyword, Name, Whitespace, Name, Operator,
+                      Literal.Date, Whitespace), 'comment'),
+            (r'New patches:', Generic.Heading),
+            (r'Context:', Generic.Heading),
+            (r'Patch bundle hash:', Generic.Heading),
+            (r'(\s*)(%s)(.*)(\n)' % '|'.join(DPATCH_KEYWORDS),
+                bygroups(Whitespace, Keyword, Text, Whitespace)),
+            (r'\+', Generic.Inserted, "insert"),
+            (r'-', Generic.Deleted, "delete"),
+            (r'(.*)(\n)', bygroups(Text, Whitespace)),
+        ],
+        'comment': [
+            (r'[^\]].*\n', Comment),
+            (r'\]', Operator, "#pop"),
+        ],
+        'specialText': [            # darcs add [_CODE_] special operators for clarity
+            (r'\n', Whitespace, "#pop"),  # line-based
+            (r'\[_[^_]*_]', Operator),
+        ],
+        'insert': [
+            include('specialText'),
+            (r'\[', Generic.Inserted),
+            (r'[^\n\[]+', Generic.Inserted),
+        ],
+        'delete': [
+            include('specialText'),
+            (r'\[', Generic.Deleted),
+            (r'[^\n\[]+', Generic.Deleted),
+        ],
+    }
+
+
+class WDiffLexer(RegexLexer):
+    """
+    A `wdiff <https://www.gnu.org/software/wdiff/>`_ lexer.
+
+    Note that:
+
+    * It only works with normal output (without options like ``-l``).
+    * If the target files contain "[-", "-]", "{+", or "+}",
+      especially they are unbalanced, the lexer will get confused.
+
+    .. versionadded:: 2.2
+    """
+
+    name = 'WDiff'
+    aliases = ['wdiff']
+    filenames = ['*.wdiff']
+    mimetypes = []
+
+    flags = re.MULTILINE | re.DOTALL
+
+    # We can only assume "[-" after "[-" before "-]" is `nested`,
+    # for instance wdiff to wdiff outputs. We have no way to
+    # distinct these marker is of wdiff output from original text.
+
+    ins_op = r"\{\+"
+    ins_cl = r"\+\}"
+    del_op = r"\[\-"
+    del_cl = r"\-\]"
+    normal = r'[^{}[\]+-]+'  # for performance
+    tokens = {
+        'root': [
+            (ins_op, Generic.Inserted, 'inserted'),
+            (del_op, Generic.Deleted, 'deleted'),
+            (normal, Text),
+            (r'.', Text),
+        ],
+        'inserted': [
+            (ins_op, Generic.Inserted, '#push'),
+            (del_op, Generic.Inserted, '#push'),
+            (del_cl, Generic.Inserted, '#pop'),
+
+            (ins_cl, Generic.Inserted, '#pop'),
+            (normal, Generic.Inserted),
+            (r'.', Generic.Inserted),
+        ],
+        'deleted': [
+            (del_op, Generic.Deleted, '#push'),
+            (ins_op, Generic.Deleted, '#push'),
+            (ins_cl, Generic.Deleted, '#pop'),
+
+            (del_cl, Generic.Deleted, '#pop'),
+            (normal, Generic.Deleted),
+            (r'.', Generic.Deleted),
+        ],
+    }