170 lines
5.3 KiB
Python
170 lines
5.3 KiB
Python
"""
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pygments.lexers.diff
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~~~~~~~~~~~~~~~~~~~~
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Lexers for diff/patch formats.
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:copyright: Copyright 2006-2024 by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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import re
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from pygments.lexer import RegexLexer, include, bygroups
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from pygments.token import Text, Comment, Operator, Keyword, Name, Generic, \
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Literal, Whitespace
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__all__ = ['DiffLexer', 'DarcsPatchLexer', 'WDiffLexer']
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class DiffLexer(RegexLexer):
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"""
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Lexer for unified or context-style diffs or patches.
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"""
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name = 'Diff'
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aliases = ['diff', 'udiff']
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filenames = ['*.diff', '*.patch']
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mimetypes = ['text/x-diff', 'text/x-patch']
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url = 'https://en.wikipedia.org/wiki/Diff'
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version_added = ''
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tokens = {
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'root': [
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(r'( )(.*)(\n)', bygroups(Whitespace, Text, Whitespace)),
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(r'(!.*|---)(\n)', bygroups(Generic.Strong, Whitespace)),
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(r'((?:< |-).*)(\n)', bygroups(Generic.Deleted, Whitespace)),
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(r'((?:> |\+).*)(\n)', bygroups(Generic.Inserted, Whitespace)),
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(
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r'(@.*|\d(?:,\d+)?(?:a|c|d)\d+(?:,\d+)?)(\n)',
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bygroups(Generic.Subheading, Whitespace),
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),
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(r'((?:[Ii]ndex|diff).*)(\n)', bygroups(Generic.Heading, Whitespace)),
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(r'(=.*)(\n)', bygroups(Generic.Heading, Whitespace)),
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(r'(.*)(\n)', bygroups(Text, Whitespace)),
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]
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}
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def analyse_text(text):
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if text[:7] == 'Index: ':
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return True
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if text[:5] == 'diff ':
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return True
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if text[:4] == '--- ':
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return 0.9
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class DarcsPatchLexer(RegexLexer):
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"""
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DarcsPatchLexer is a lexer for the various versions of the darcs patch
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format. Examples of this format are derived by commands such as
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``darcs annotate --patch`` and ``darcs send``.
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"""
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name = 'Darcs Patch'
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aliases = ['dpatch']
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filenames = ['*.dpatch', '*.darcspatch']
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url = 'https://darcs.net'
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version_added = '0.10'
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DPATCH_KEYWORDS = ('hunk', 'addfile', 'adddir', 'rmfile', 'rmdir', 'move',
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'replace')
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tokens = {
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'root': [
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(r'<', Operator),
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(r'>', Operator),
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(r'\{', Operator),
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(r'\}', Operator),
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(r'(\[)((?:TAG )?)(.*)(\n)(.*)(\*\*)(\d+)(\s?)(\])',
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bygroups(Operator, Keyword, Name, Whitespace, Name, Operator,
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Literal.Date, Whitespace, Operator)),
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(r'(\[)((?:TAG )?)(.*)(\n)(.*)(\*\*)(\d+)(\s?)',
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bygroups(Operator, Keyword, Name, Whitespace, Name, Operator,
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Literal.Date, Whitespace), 'comment'),
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(r'New patches:', Generic.Heading),
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(r'Context:', Generic.Heading),
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(r'Patch bundle hash:', Generic.Heading),
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(r'(\s*)({})(.*)(\n)'.format('|'.join(DPATCH_KEYWORDS)),
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bygroups(Whitespace, Keyword, Text, Whitespace)),
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(r'\+', Generic.Inserted, "insert"),
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(r'-', Generic.Deleted, "delete"),
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(r'(.*)(\n)', bygroups(Text, Whitespace)),
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],
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'comment': [
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(r'[^\]].*\n', Comment),
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(r'\]', Operator, "#pop"),
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],
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'specialText': [ # darcs add [_CODE_] special operators for clarity
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(r'\n', Whitespace, "#pop"), # line-based
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(r'\[_[^_]*_]', Operator),
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],
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'insert': [
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include('specialText'),
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(r'\[', Generic.Inserted),
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(r'[^\n\[]+', Generic.Inserted),
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],
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'delete': [
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include('specialText'),
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(r'\[', Generic.Deleted),
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(r'[^\n\[]+', Generic.Deleted),
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],
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}
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class WDiffLexer(RegexLexer):
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"""
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A wdiff lexer.
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Note that:
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* It only works with normal output (without options like ``-l``).
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* If the target files contain "[-", "-]", "{+", or "+}",
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especially they are unbalanced, the lexer will get confused.
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"""
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name = 'WDiff'
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url = 'https://www.gnu.org/software/wdiff/'
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aliases = ['wdiff']
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filenames = ['*.wdiff']
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mimetypes = []
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version_added = '2.2'
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flags = re.MULTILINE | re.DOTALL
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# We can only assume "[-" after "[-" before "-]" is `nested`,
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# for instance wdiff to wdiff outputs. We have no way to
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# distinct these marker is of wdiff output from original text.
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ins_op = r"\{\+"
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ins_cl = r"\+\}"
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del_op = r"\[\-"
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del_cl = r"\-\]"
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normal = r'[^{}[\]+-]+' # for performance
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tokens = {
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'root': [
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(ins_op, Generic.Inserted, 'inserted'),
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(del_op, Generic.Deleted, 'deleted'),
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(normal, Text),
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(r'.', Text),
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],
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'inserted': [
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(ins_op, Generic.Inserted, '#push'),
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(del_op, Generic.Inserted, '#push'),
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(del_cl, Generic.Inserted, '#pop'),
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(ins_cl, Generic.Inserted, '#pop'),
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(normal, Generic.Inserted),
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(r'.', Generic.Inserted),
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],
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'deleted': [
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(del_op, Generic.Deleted, '#push'),
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(ins_op, Generic.Deleted, '#push'),
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(ins_cl, Generic.Deleted, '#pop'),
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(del_cl, Generic.Deleted, '#pop'),
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(normal, Generic.Deleted),
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(r'.', Generic.Deleted),
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],
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}
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