From 3570869c9ae2c4df14b15423789919e514322916 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc=20Andr=C3=A9=20Tanner?= <mat@brain-dump.org>
Date: Wed, 7 Dec 2016 16:49:29 +0100
Subject: Move all lua related files to lua/ subfolder

Also remove the lexers sub directory from the Lua search path.
As a result we attempt to open fewer files during startup:

 $ strace -e open -o log ./vis +q config.h && wc -l log

In order to avoid having to modifiy all lexers which `require('lexer')`
we instead place a symlink in the top level directory.

 $ ./configure --disable-lua
 $ rm -rf lua

Should result in a source tree with most lua specifc functionality
removed.
---
 lua/lexers/batch.lua | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 lua/lexers/batch.lua

(limited to 'lua/lexers/batch.lua')

diff --git a/lua/lexers/batch.lua b/lua/lexers/batch.lua
new file mode 100644
index 0000000..a39d20a
--- /dev/null
+++ b/lua/lexers/batch.lua
@@ -0,0 +1,71 @@
+-- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
+-- Batch LPeg lexer.
+
+local l = require('lexer')
+local token, word_match = l.token, l.word_match
+local P, R, S = lpeg.P, lpeg.R, lpeg.S
+
+local M = {_NAME = 'batch'}
+
+-- Whitespace.
+local ws = token(l.WHITESPACE, l.space^1)
+
+-- Comments.
+local rem = (P('REM') + 'rem') * l.space
+local comment = token(l.COMMENT, (rem + '::') * l.nonnewline^0)
+
+-- Strings.
+local string = token(l.STRING, l.delimited_range('"', true))
+
+-- Keywords.
+local keyword = token(l.KEYWORD, word_match({
+  'cd', 'chdir', 'md', 'mkdir', 'cls', 'for', 'if', 'echo', 'echo.', 'move',
+  'copy', 'ren', 'del', 'set', 'call', 'exit', 'setlocal', 'shift',
+  'endlocal', 'pause', 'defined', 'exist', 'errorlevel', 'else', 'in', 'do',
+  'NUL', 'AUX', 'PRN', 'not', 'goto', 'pushd', 'popd'
+}, nil, true))
+
+-- Functions.
+local func = token(l.FUNCTION, word_match({
+  'APPEND', 'ATTRIB', 'CHKDSK', 'CHOICE', 'DEBUG', 'DEFRAG', 'DELTREE',
+  'DISKCOMP', 'DISKCOPY', 'DOSKEY', 'DRVSPACE', 'EMM386', 'EXPAND', 'FASTOPEN',
+  'FC', 'FDISK', 'FIND', 'FORMAT', 'GRAPHICS', 'KEYB', 'LABEL', 'LOADFIX',
+  'MEM', 'MODE', 'MORE', 'MOVE', 'MSCDEX', 'NLSFUNC', 'POWER', 'PRINT', 'RD',
+  'REPLACE', 'RESTORE', 'SETVER', 'SHARE', 'SORT', 'SUBST', 'SYS', 'TREE',
+  'UNDELETE', 'UNFORMAT', 'VSAFE', 'XCOPY'
+}, nil, true))
+
+-- Identifiers.
+local identifier = token(l.IDENTIFIER, l.word)
+
+-- Variables.
+local variable = token(l.VARIABLE,
+                       '%' * (l.digit + '%' * l.alpha) +
+                       l.delimited_range('%', true, true))
+
+-- Operators.
+local operator = token(l.OPERATOR, S('+|&!<>='))
+
+-- Labels.
+local label = token(l.LABEL, ':' * l.word)
+
+M._rules = {
+  {'whitespace', ws},
+  {'keyword', keyword},
+  {'function', func},
+  {'comment', comment},
+  {'identifier', identifier},
+  {'string', string},
+  {'variable', variable},
+  {'label', label},
+  {'operator', operator},
+}
+
+M._LEXBYLINE = true
+
+M._foldsymbols = {
+  _patterns = {'[A-Za-z]+'},
+  [l.KEYWORD] = {setlocal = 1, endlocal = -1, SETLOCAL = 1, ENDLOCAL = -1}
+}
+
+return M
-- 
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