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, 47 deletions

diff --git a/lexers/props.lua b/lexers/props.lua
deleted file mode 100644
index 5602787..0000000
--- a/lexers/props.lua
+++ /dev/null
@@ -1,47 +0,0 @@
--- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
--- Props 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 = 'props'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Comments.
-local comment = token(l.COMMENT, '#' * l.nonnewline^0)
-
--- Equals.
-local equals = token(l.OPERATOR, '=')
-
--- Strings.
-local sq_str = l.delimited_range("'")
-local dq_str = l.delimited_range('"')
-local string = token(l.STRING, sq_str + dq_str)
-
--- Variables.
-local variable = token(l.VARIABLE, '$(' * (l.any - ')')^1 * ')')
-
--- Colors.
-local xdigit = l.xdigit
-local color = token('color', '#' * xdigit * xdigit * xdigit * xdigit * xdigit *
-                             xdigit)
-
-M._rules = {
-  {'whitespace', ws},
-  {'color', color},
-  {'comment', comment},
-  {'equals', equals},
-  {'string', string},
-  {'variable', variable},
-}
-
-M._tokenstyles = {
-  color = l.STYLE_NUMBER
-}
-
-M._LEXBYLINE = true
-
-return M