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-- Copyright 2017 Marc André Tanner
-- git-rebase(1) LPeg lexer.
local l = require('lexer')
local token, word_match = l.token, l.word_match
local P, R = lpeg.P, lpeg.R
local M = {_NAME = 'git-rebase'}
-- Whitespace.
local ws = token(l.WHITESPACE, l.space^1)
-- Comments.
local comment = token(l.COMMENT, l.starts_line('#') * l.nonnewline^0)
-- Keywords.
local keywords = l.starts_line(word_match{
'p', 'pick',
'r', 'reword',
'e', 'edit',
's', 'squash',
'f', 'fixup',
'x', 'exec',
'd', 'drop',
'l', 'label',
't', 'reset',
'm', 'merge',
})
local keyword = token(l.KEYWORD, keywords)
-- Commit SHA1.
local function patn(pat, min, max)
return -pat^(max + 1) * pat^min
end
local commit = token(l.NUMBER, patn(R('09', 'af'), 7, 40))
local message = token(l.STRING, l.nonnewline^1)
M._rules = {
{'whitespace', ws},
{'comment', comment},
{'keyword', keyword},
{'commit', commit},
{'message', message},
}
M._LEXBYLINE = true
return M
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