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, 62 deletions

diff --git a/lexers/coffeescript.lua b/lexers/coffeescript.lua
deleted file mode 100644
index 366d390..0000000
--- a/lexers/coffeescript.lua
+++ /dev/null
@@ -1,62 +0,0 @@
--- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
--- CoffeeScript LPeg lexer.
-
-local l = require('lexer')
-local token, word_match = l.token, l.word_match
-local P, S = lpeg.P, lpeg.S
-
-local M = {_NAME = 'coffeescript'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Comments.
-local block_comment = '###' * (l.any - '###')^0 * P('###')^-1
-local line_comment = '#' * l.nonnewline_esc^0
-local comment = token(l.COMMENT, block_comment + line_comment)
-
--- Strings.
-local sq_str = l.delimited_range("'")
-local dq_str = l.delimited_range('"')
-local regex_str = #P('/') * l.last_char_includes('+-*%<>!=^&|?~:;,([{') *
-                  l.delimited_range('/', true) * S('igm')^0
-local string = token(l.STRING, sq_str + dq_str) + token(l.REGEX, regex_str)
-
--- Numbers.
-local number = token(l.NUMBER, l.float + l.integer)
-
--- Keywords.
-local keyword = token(l.KEYWORD, word_match{
-  'all', 'and', 'bind', 'break', 'by', 'case', 'catch', 'class', 'const',
-  'continue', 'default', 'delete', 'do', 'each', 'else', 'enum', 'export',
-  'extends', 'false', 'for', 'finally', 'function', 'if', 'import', 'in',
-  'instanceof', 'is', 'isnt', 'let', 'loop', 'native', 'new', 'no', 'not', 'of',
-  'off', 'on', 'or', 'return', 'super', 'switch', 'then', 'this', 'throw',
-  'true', 'try', 'typeof', 'unless', 'until', 'var', 'void', 'with', 'when',
-  'while', 'yes'
-})
-
--- Fields: object properties and methods.
-local field = token(l.FUNCTION, '.' * (S('_$') + l.alpha) *
-                                (S('_$') + l.alnum)^0)
-
--- Identifiers.
-local identifier = token(l.IDENTIFIER, l.word)
-
--- Operators.
-local operator = token(l.OPERATOR, S('+-/*%<>!=^&|?~:;,.()[]{}'))
-
-M._rules = {
-  {'whitespace', ws},
-  {'keyword', keyword},
-  {'field', field},
-  {'identifier', identifier},
-  {'comment', comment},
-  {'number', number},
-  {'string', string},
-  {'operator', operator},
-}
-
-M._FOLDBYINDENTATION = true
-
-return M