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, 171 deletions

diff --git a/lexers/moonscript.lua b/lexers/moonscript.lua
deleted file mode 100644
index 8cbe765..0000000
--- a/lexers/moonscript.lua
+++ /dev/null
@@ -1,171 +0,0 @@
--- Copyright 2016 Alejandro Baez (https://keybase.io/baez). See LICENSE.
--- Moonscript LPeg lexer.
-
-local l = require('lexer')
-local token, word_match = l.token, l.word_match
-local P, S, R = lpeg.P, lpeg.S, lpeg.R
-
-local M = {_NAME = 'moonscript'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
-local longstring = lpeg.Cmt('[' * lpeg.C(P('=')^0) * '[',
-                            function(input, index, eq)
-                              local _, e = input:find(']'..eq..']', index, true)
-                              return (e or #input) + 1
-                            end)
-
--- Comments.
-local line_comment = '--' * l.nonnewline^0
-local block_comment = '--' * longstring
-local comment = token(l.COMMENT, block_comment + line_comment)
-
--- Strings.
-local sq_str = l.delimited_range("'", false, true)
-local dq_str = l.delimited_range('"', false, true)
-
-local string = token(l.STRING, sq_str + dq_str) +
-               token('longstring', longstring)
-
--- Numbers.
-local number = token(l.NUMBER, l.float + l.integer)
-
--- Keywords.
-local keyword = token(l.KEYWORD, word_match {
-  -- Lua.
-  'and', 'break', 'do', 'else', 'elseif', 'false', 'for', 'if', 'in', 'local',
-  'nil', 'not', 'or', 'return', 'then', 'true', 'while',
-  -- Moonscript.
-  'continue', 'class', 'export', 'extends', 'from', 'import', 'super', 'switch',
-  'unless', 'using', 'when', 'with'
-})
-
--- Constants.
-local constant = token(l.CONSTANT, word_match{
-  '_G', '_VERSION',
-  -- Added in 5.2.
-  '_ENV'
-})
-
--- Functions.
-local func = token(l.FUNCTION, word_match{
-  'assert', 'collectgarbage', 'dofile', 'error', 'getmetatable', 'ipairs',
-  'load', 'loadfile', 'next', 'pairs', 'pcall', 'print', 'rawequal', 'rawget',
-  'rawset', 'require', 'select', 'setmetatable', 'tonumber', 'tostring', 'type',
-  'xpcall',
-  -- Added in 5.2.
-  'rawlen'
-})
-
--- Libraries.
-local library = token('library', word_match({
-  -- Coroutine.
-  'coroutine', 'coroutine.create', 'coroutine.resume', 'coroutine.running',
-  'coroutine.status', 'coroutine.wrap', 'coroutine.yield',
-  -- Coroutine added in 5.3.
-  'coroutine.isyieldable',
-  -- Module.
-  'package', 'package.cpath', 'package.loaded', 'package.loadlib',
-  'package.path', 'package.preload',
-  -- Module added in 5.2.
-  'package.config', 'package.searchers', 'package.searchpath',
-  -- UTF-8 added in 5.3.
-  'utf8', 'utf8.char', 'utf8.charpattern', 'utf8.codepoint', 'utf8.codes',
-  'utf8.len', 'utf8.offset',
-  -- String.
-  'string', 'string.byte', 'string.char', 'string.dump', 'string.find',
-  'string.format', 'string.gmatch', 'string.gsub', 'string.len', 'string.lower',
-  'string.match', 'string.rep', 'string.reverse', 'string.sub', 'string.upper',
-  -- String added in 5.3.
-  'string.pack', 'string.packsize', 'string.unpack',
-  -- Table.
-  'table', 'table.concat', 'table.insert', 'table.remove', 'table.sort',
-  -- Table added in 5.2.
-  'table.pack', 'table.unpack',
-  -- Table added in 5.3.
-  'table.move',
-  -- Math.
-  'math', 'math.abs', 'math.acos', 'math.asin', 'math.atan', 'math.ceil',
-  'math.cos', 'math.deg', 'math.exp', 'math.floor', 'math.fmod', 'math.huge',
-  'math.log', 'math.max', 'math.min', 'math.modf', 'math.pi', 'math.rad',
-  'math.random', 'math.randomseed', 'math.sin', 'math.sqrt', 'math.tan',
-  -- Math added in 5.3.
-  'math.maxinteger', 'math.mininteger', 'math.tointeger', 'math.type',
-  'math.ult',
-  -- IO.
-  'io', 'io.close', 'io.flush', 'io.input', 'io.lines', 'io.open', 'io.output',
-  'io.popen', 'io.read', 'io.stderr', 'io.stdin', 'io.stdout', 'io.tmpfile',
-  'io.type', 'io.write',
-  -- OS.
-  'os', 'os.clock', 'os.date', 'os.difftime', 'os.execute', 'os.exit',
-  'os.getenv', 'os.remove', 'os.rename', 'os.setlocale', 'os.time',
-  'os.tmpname',
-  -- Debug.
-  'debug', 'debug.debug', 'debug.gethook', 'debug.getinfo', 'debug.getlocal',
-  'debug.getmetatable', 'debug.getregistry', 'debug.getupvalue',
-  'debug.sethook', 'debug.setlocal', 'debug.setmetatable', 'debug.setupvalue',
-  'debug.traceback',
-  -- Debug added in 5.2.
-  'debug.getuservalue', 'debug.setuservalue', 'debug.upvalueid',
-  'debug.upvaluejoin',
-
-  --- MoonScript 0.3.1 standard library.
-  -- Printing functions.
-  'p',
-  -- Table functions.
-  'run_with_scope', 'defaultbl', 'extend', 'copy',
-  -- Class/object functions.
-  'is_object', 'bind_methods', 'mixin', 'mixin_object', 'mixin_table',
-  -- Misc functions.
-  'fold',
-  -- Debug functions.
-  'debug.upvalue',
-}, '.'))
-
--- Identifiers.
-local identifier = token(l.IDENTIFIER, l.word)
-local proper_ident = token('proper_ident', R('AZ') * l.word)
-local tbl_key = token('tbl_key', l.word * ':' + ':' * l.word )
-
-local fndef = token('fndef', P('->') + '=>')
-local err = token(l.ERROR, word_match{'function', 'end'})
-
--- Operators.
-local symbol = token('symbol', S('(){}[]'))
-local operator = token(l.OPERATOR, S('+-*!\\/%^#=<>;:,.'))
-
--- Self reference.
-local self_var = token('self_ref', '@' * l.word + 'self')
-
-M._rules = {
-  {'whitespace', ws},
-  {'keyword', keyword},
-  {'error', err},
-  {'self', self_var},
-  {'function', func},
-  {'constant', constant},
-  {'library', library},
-  {'identifier', proper_ident + tbl_key + identifier},
-  {'string', string},
-  {'comment', comment},
-  {'number', number},
-  {'fndef', fndef},
-  {'symbol', symbol},
-  {'operator', operator},
-}
-
-M._tokenstyles = {
-  longstring = l.STYLE_STRING,
-  library = l.STYLE_TYPE,
-  self_ref = l.STYLE_LABEL,
-  proper_ident = l.STYLE_CLASS,
-  fndef = l.STYLE_PREPROCESSOR,
-  symbol = l.STYLE_EMBEDDED,
-  tbl_key = l.STYLE_REGEX,
-  error = l.STYLE_ERROR,
-}
-
-M._FOLDBYINDENTATION = true
-
-return M