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, 75 deletions

diff --git a/lexers/scala.lua b/lexers/scala.lua
deleted file mode 100644
index d455996..0000000
--- a/lexers/scala.lua
+++ /dev/null
@@ -1,75 +0,0 @@
--- Copyright 2006-2013 JMS. See LICENSE.
--- Scala 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 = 'scala'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Comments.
-local line_comment = '//' * l.nonnewline_esc^0
-local block_comment = '/*' * (l.any - '*/')^0 * P('*/')^-1
-local comment = token(l.COMMENT, line_comment + block_comment)
-
--- Strings.
-local symbol = "'" * l.word
-local dq_str = l.delimited_range('"', true)
-local tq_str = '"""' * (l.any - '"""')^0 * P('"""')^-1
-local string = token(l.STRING, tq_str + symbol + dq_str)
-
--- Numbers.
-local number = token(l.NUMBER, (l.float + l.integer) * S('LlFfDd')^-1)
-
--- Keywords.
-local keyword = token(l.KEYWORD, word_match{
-  'abstract', 'case', 'catch', 'class', 'def', 'do', 'else', 'extends', 'false',
-  'final', 'finally', 'for', 'forSome', 'if', 'implicit', 'import', 'lazy',
-  'match', 'new', 'null', 'object', 'override', 'package', 'private',
-  'protected', 'return', 'sealed', 'super', 'this', 'throw', 'trait', 'try',
-  'true', 'type', 'val', 'var', 'while', 'with', 'yield'
-})
-
--- Types.
-local type = token(l.TYPE, word_match{
-  'Array', 'Boolean', 'Buffer', 'Byte', 'Char', 'Collection', 'Double', 'Float',
-  'Int', 'Iterator', 'LinkedList', 'List', 'Long', 'Map', 'None', 'Option',
-  'Set', 'Short', 'SortedMap', 'SortedSet', 'String', 'TreeMap', 'TreeSet'
-})
-
--- Identifiers.
-local identifier = token(l.IDENTIFIER, l.word)
-
--- Operators.
-local operator = token(l.OPERATOR, S('+-/*%<>!=^&|?~:;.()[]{}'))
-
--- Functions.
-local func = token(l.FUNCTION, l.word) * #P('(')
-
--- Classes.
-local class_sequence = token(l.KEYWORD, P('class')) * ws^1 *
-                       token(l.CLASS, l.word)
-
-M._rules = {
-  {'whitespace', ws},
-  {'class', class_sequence},
-  {'keyword', keyword},
-  {'type', type},
-  {'function', func},
-  {'identifier', identifier},
-  {'string', string},
-  {'comment', comment},
-  {'number', number},
-  {'operator', operator},
-}
-
-M._foldsymbols = {
-  _patterns = {'[{}]', '/%*', '%*/', '//'},
-  [l.OPERATOR] = {['{'] = 1, ['}'] = -1},
-  [l.COMMENT] = {['/*'] = 1, ['*/'] = -1, ['//'] = l.fold_line_comments('//')}
-}
-
-return M