33 lines
1.3 KiB
Lua
33 lines
1.3 KiB
Lua
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-- Copyright 2006-2019 Mitchell mitchell.att.foicica.com. See License.txt.
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-- Diff LPeg lexer.
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local lexer = require('lexer')
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local token, word_match = lexer.token, lexer.word_match
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local P, R, S = lpeg.P, lpeg.R, lpeg.S
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local lex = lexer.new('diff', {lex_by_line = true})
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-- Text, separators, and file headers.
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lex:add_rule('index', token(lexer.COMMENT, 'Index: ' * lexer.any^0 * -1))
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lex:add_rule('separator', token(lexer.COMMENT, ('---' + P('*')^4 + P('=')^1) *
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lexer.space^0 * -1))
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lex:add_rule('header', token('header', (P('*** ') + '--- ' + '+++ ') *
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lexer.any^1))
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lex:add_style('header', lexer.STYLE_COMMENT)
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-- Location.
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lex:add_rule('location', token(lexer.NUMBER, ('@@' + lexer.digit^1 + '****') *
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lexer.any^1))
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-- Additions, deletions, and changes.
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lex:add_rule('addition', token('addition', S('>+') * lexer.any^0))
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lex:add_style('addition', 'fore:$(color.green)')
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lex:add_rule('deletion', token('deletion', S('<-') * lexer.any^0))
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lex:add_style('deletion', 'fore:$(color.red)')
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lex:add_rule('change', token('change', '!' * lexer.any^0))
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lex:add_style('change', 'fore:$(color.yellow)')
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lex:add_rule('any_line', token(lexer.DEFAULT, lexer.any^1))
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return lex
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