lexers/pkgbuild.lua

   1 -- Copyright 2006-2013 gwash. See LICENSE.
   2 -- Archlinux PKGBUILD LPeg lexer.
   3
   4 local l = require('lexer')
   5 local token, word_match = l.token, l.word_match
   6 local P, R, S = lpeg.P, lpeg.R, lpeg.S
   7
   8 local M = {_NAME = 'pkgbuild'}
   9
  10 -- Whitespace.
  11 local ws = token(l.WHITESPACE, l.space^1)
  12
  13 -- Comments.
  14 local comment = token(l.COMMENT, '#' * l.nonnewline^0)
  15
  16 -- Strings.
  17 local sq_str = l.delimited_range("'", false, true)
  18 local dq_str = l.delimited_range('"')
  19 local ex_str = l.delimited_range('`')
  20 local heredoc = '<<' * P(function(input, index)
  21   local s, e, _, delimiter =
  22     input:find('(["\']?)([%a_][%w_]*)%1[\n\r\f;]+', index)
  23   if s == index and delimiter then
  24     local _, e = input:find('[\n\r\f]+'..delimiter, e)
  25     return e and e + 1 or #input + 1
  26   end
  27 end)
  28 local string = token(l.STRING, sq_str + dq_str + ex_str + heredoc)
  29
  30 -- Numbers.
  31 local number = token(l.NUMBER, l.float + l.integer)
  32
  33 -- Keywords.
  34 local keyword = token(l.KEYWORD, word_match({
  35   'patch', 'cd', 'make', 'patch', 'mkdir', 'cp', 'sed', 'install', 'rm',
  36   'if', 'then', 'elif', 'else', 'fi', 'case', 'in', 'esac', 'while', 'for',
  37   'do', 'done', 'continue', 'local', 'return', 'git', 'svn', 'co', 'clone',
  38   'gconf-merge-schema', 'msg', 'echo', 'ln',
  39   -- Operators.
  40   '-a', '-b', '-c', '-d', '-e', '-f', '-g', '-h', '-k', '-p', '-r', '-s', '-t',
  41   '-u', '-w', '-x', '-O', '-G', '-L', '-S', '-N', '-nt', '-ot', '-ef', '-o',
  42   '-z', '-n', '-eq', '-ne', '-lt', '-le', '-gt', '-ge', '-Np', '-i'
  43 }, '-'))
  44
  45 -- Functions.
  46 local func = token(l.FUNCTION, word_match{
  47   'build',
  48   'check',
  49   'package',
  50   'pkgver',
  51   'prepare'
  52 })
  53
  54 -- Constants.
  55 local constant = token(l.CONSTANT, word_match{
  56   'arch',
  57   'backup',
  58   'changelog',
  59   'checkdepends',
  60   'conflicts',
  61   'depends',
  62   'epoch',
  63   'groups',
  64   'install',
  65   'license',
  66   'makedepends',
  67   'md5sums',
  68   'noextract',
  69   'optdepends',
  70   'options',
  71   'pkgbase',
  72   'pkgdesc',
  73   'pkgname',
  74   'pkgrel',
  75   'pkgver',
  76   'provides',
  77   'replaces',
  78   'sha1sums',
  79   'sha256sums',
  80   'sha384sums',
  81   'sha512sums',
  82   'source',
  83   'url',
  84   'validpgpkeys'
  85 })
  86
  87 -- Identifiers.
  88 local identifier = token(l.IDENTIFIER, l.word)
  89
  90 -- Variables.
  91 local variable = token(l.VARIABLE,
  92                        '$' * (S('!#?*@$') +
  93                        l.delimited_range('()', true, true) +
  94                        l.delimited_range('[]', true, true) +
  95                        l.delimited_range('{}', true, true) +
  96                        l.delimited_range('`', true, true) +
  97                        l.digit^1 + l.word))
  98
  99 -- Operators.
 100 local operator = token(l.OPERATOR, S('=!<>+-/*^~.,:;?()[]{}'))
 101
 102 M._rules = {
 103   {'whitespace', ws},
 104   {'comment', comment},
 105   {'string', string},
 106   {'number', number},
 107   {'keyword', keyword},
 108   {'function', func},
 109   {'constant', constant},
 110   {'identifier', identifier},
 111   {'variable', variable},
 112   {'operator', operator},
 113 }
 114
 115 M._foldsymbols = {
 116   _patterns = {'[%(%){}]', '#'},
 117   [l.OPERATOR] = {['('] = 1, [')'] = -1, ['{'] = 1, ['}'] = -1},
 118   [l.COMMENT] = {['#'] = l.fold_line_comments('#')}
 119 }
 120
 121 return M