textadept/pkgbuild.lua

   1 local l = lexer
   2 local token, style, color, word_match = l.token, l.style, l.color, l.word_match
   3 local P, R, S = l.lpeg.P, l.lpeg.R, l.lpeg.S
   4
   5 module(...)
   6
   7 local ws = token('whitespace', l.space^1)
   8
   9 -- comments
  10 local comment = token('comment', '#' * l.nonnewline^0)
  11
  12 -- strings
  13 local sq_str = l.delimited_range("'", nil, true)
  14 local dq_str = l.delimited_range('"', '\\', true)
  15 local ex_str = l.delimited_range('`', '\\', true)
  16 local heredoc = '<<' * P(function(input, index)
  17   local s, e, _, delimiter = input:find('(["\']?)([%a_][%w_]*)%1[\n\r\f;]+', index)
  18   if s == index and delimiter then
  19     local _, e = input:find('[\n\r\f]+'..delimiter, e)
  20     return e and e + 1 or #input + 1
  21   end
  22 end)
  23 local string = token('string', sq_str + dq_str + ex_str + heredoc)
  24
  25 -- numbers
  26 local number = token('number', l.float + l.integer)
  27
  28 -- keywords
  29 local keyword = token('keyword', word_match({
  30   'patch', 'cd', 'make', 'patch', 'mkdir', 'cp', 'sed', 'install', 'rm',
  31   'if', 'then', 'elif', 'else', 'fi', 'case', 'in', 'esac', 'while', 'for',
  32   'do', 'done', 'continue', 'local', 'return', 'git', 'svn', 'co', 'clone',
  33   'gconf-merge-schema', 'msg', 'echo', 'ln',
  34   -- operators
  35   '-a', '-b', '-c', '-d', '-e', '-f', '-g', '-h', '-k', '-p', '-r', '-s', '-t',
  36   '-u', '-w', '-x', '-O', '-G', '-L', '-S', '-N', '-nt', '-ot', '-ef', '-o',
  37   '-z', '-n', '-eq', '-ne', '-lt', '-le', '-gt', '-ge', '-i', '-sf'
  38 }, '-'))
  39
  40 -- functions
  41 local func = token('function', word_match {
  42   'build', 'package', 'pre_install', 'post_install', 'pre_upgrade', 'post_upgrade', 'pre_remove',
  43   'post_remove'
  44 })
  45
  46 -- constants
  47 local constant = token('constant', word_match {
  48   'pkgname', 'pkgbase', 'pkgver', 'pkgrel', 'pkgdesc', 'arch', 'url',
  49   'license', 'optdepends', 'depends', 'makedepends', 'provides',
  50   'conflicts', 'replaces', 'options', 'install', 'source', 'md5sums',
  51   'pkgdir', 'srcdir'
  52 })
  53
  54 -- identifiers
  55 local identifier = token('identifier', l.word)
  56
  57 -- variables
  58 local variable = token('variable', '$' * (S('!#?*@$') +
  59   l.delimited_range('()', nil, true, false, '\n') +
  60   l.delimited_range('[]', nil, true, false, '\n') +
  61   l.delimited_range('{}', nil, true, false, '\n') +
  62   l.delimited_range('`', nil, true, false, '\n') +
  63   l.digit^1 +
  64   l.word))
  65
  66 -- operators
  67 local operator = token('operator', S('=!<>+-/*^~.,:;?()[]{}'))
  68
  69 _rules = {
  70   { 'whitespace', ws },
  71   { 'keyword', keyword },
  72   { 'function', func },
  73   { 'constant', constant },
  74   { 'identifier', identifier },
  75   { 'string', string },
  76   { 'comment', comment },
  77   { 'number', number },
  78   { 'variable', variable },
  79   { 'operator', operator },
  80   { 'any_char', l.any_char },
  81 }