48 lines
1.2 KiB
Ruby
48 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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module Rouge
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module Lexers
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class Diff < RegexLexer
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title 'diff'
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desc 'Lexes unified diffs or patches'
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tag 'diff'
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aliases 'patch', 'udiff'
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filenames '*.diff', '*.patch'
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mimetypes 'text/x-diff', 'text/x-patch'
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def self.detect?(text)
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return true if text.start_with?('Index: ')
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return true if text =~ %r(\Adiff[^\n]*?\ba/[^\n]*\bb/)
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return true if text =~ /---.*?\n[+][+][+]/ || text =~ /[+][+][+].*?\n---/
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end
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state :root do
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rule(/^ .*$\n?/, Text)
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rule(/^---$\n?/, Punctuation)
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rule %r(
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(^\++.*$\n?) |
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(^>+[ \t]+.*$\n?) |
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(^>+$\n?)
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)x, Generic::Inserted
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rule %r(
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(^-+.*$\n?) |
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(^<+[ \t]+.*$\n?) |
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(^<+$\n?)
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)x, Generic::Deleted
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rule(/^!.*$\n?/, Generic::Strong)
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rule(/^([Ii]ndex|diff).*$\n?/, Generic::Heading)
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rule(/^(@@[^@]*@@)([^\n]*\n)/) do
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groups Punctuation, Text
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end
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rule(/^\w.*$\n?/, Punctuation)
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rule(/^=.*$\n?/, Generic::Heading)
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rule(/.+$\n?/, Text)
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end
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end
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end
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end
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