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, 78 deletions

diff --git a/lexers/go.lua b/lexers/go.lua
deleted file mode 100644
index 431c622..0000000
--- a/lexers/go.lua
+++ /dev/null
@@ -1,78 +0,0 @@
--- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
--- Go 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 = 'go'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Comments.
-local line_comment = '//' * l.nonnewline^0
-local block_comment = '/*' * (l.any - '*/')^0 * '*/'
-local comment = token(l.COMMENT, line_comment + block_comment)
-
--- Strings.
-local sq_str = l.delimited_range("'", true)
-local dq_str = l.delimited_range('"', true)
-local raw_str = l.delimited_range('`', false, true)
-local string = token(l.STRING, sq_str + dq_str + raw_str)
-
--- Numbers.
-local number = token(l.NUMBER, (l.float + l.integer) * P('i')^-1)
-
--- Keywords.
-local keyword = token(l.KEYWORD, word_match{
-  'break', 'case', 'chan', 'const', 'continue', 'default', 'defer', 'else',
-  'fallthrough', 'for', 'func', 'go', 'goto', 'if', 'import', 'interface',
-  'map', 'package', 'range', 'return', 'select', 'struct', 'switch', 'type',
-  'var'
-})
-
--- Constants.
-local constant = token(l.CONSTANT, word_match{
-  'true', 'false', 'iota', 'nil'
-})
-
--- Types.
-local type = token(l.TYPE, word_match{
-  'bool', 'byte', 'complex64', 'complex128', 'error', 'float32', 'float64',
-  'int', 'int8', 'int16', 'int32', 'int64', 'rune', 'string', 'uint', 'uint8',
-  'uint16', 'uint32', 'uint64', 'uintptr'
-})
-
--- Functions.
-local func = token(l.FUNCTION, word_match{
-  'append', 'cap', 'close', 'complex', 'copy', 'delete', 'imag', 'len', 'make',
-  'new', 'panic', 'print', 'println', 'real', 'recover'
-})
-
--- Identifiers.
-local identifier = token(l.IDENTIFIER, l.word)
-
--- Operators.
-local operator = token(l.OPERATOR, S('+-*/%&|^<>=!:;.,()[]{}'))
-
-M._rules = {
-  {'whitespace', ws},
-  {'keyword', keyword},
-  {'constant', constant},
-  {'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