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.

1 files changed, 0 insertions, 71 deletions

diff --git a/lexers/gtkrc.lua b/lexers/gtkrc.lua
deleted file mode 100644
index 02e4d45..0000000
--- a/lexers/gtkrc.lua
+++ /dev/null
@@ -1,71 +0,0 @@
--- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
--- Gtkrc 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 = 'gtkrc'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Comments.
-local comment = token(l.COMMENT, '#' * l.nonnewline^0)
-
--- Strings.
-local sq_str = l.delimited_range("'", true)
-local dq_str = l.delimited_range('"', true)
-local string = token(l.STRING, sq_str + dq_str)
-
--- Numbers.
-local number = token(l.NUMBER, l.digit^1 * ('.' * l.digit^1)^-1)
-
--- Keywords.
-local keyword = token(l.KEYWORD, word_match{
-  'binding', 'class', 'include', 'module_path', 'pixmap_path', 'im_module_file',
-  'style', 'widget', 'widget_class'
-})
-
--- Variables.
-local variable = token(l.VARIABLE, word_match{
-  'bg', 'fg', 'base', 'text', 'xthickness', 'ythickness', 'bg_pixmap', 'font',
-  'fontset', 'font_name', 'stock', 'color', 'engine'
-})
-
--- States.
-local state = token(l.CONSTANT, word_match{
-  'ACTIVE', 'SELECTED', 'NORMAL', 'PRELIGHT', 'INSENSITIVE', 'TRUE', 'FALSE'
-})
-
--- Functions.
-local func = token(l.FUNCTION, word_match{
-  'mix', 'shade', 'lighter', 'darker'
-})
-
--- Identifiers.
-local identifier = token(l.IDENTIFIER, l.alpha * (l.alnum + S('_-'))^0)
-
--- Operators.
-local operator = token(l.OPERATOR, S(':=,*()[]{}'))
-
-M._rules = {
-  {'whitespace', ws},
-  {'keyword', keyword},
-  {'variable', variable},
-  {'state', state},
-  {'function', func},
-  {'identifier', identifier},
-  {'string', string},
-  {'comment', comment},
-  {'number', number},
-  {'operator', operator},
-}
-
-M._foldsymbols = {
-  _patterns = {'[{}]', '#'},
-  [l.OPERATOR] = {['{'] = 1, ['}'] = -1},
-  [l.COMMENT] = {['#'] = l.fold_line_comments('#')}
-}
-
-return M