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, 97 deletions

diff --git a/lexers/vcard.lua b/lexers/vcard.lua
deleted file mode 100644
index 2057451..0000000
--- a/lexers/vcard.lua
+++ /dev/null
@@ -1,97 +0,0 @@
--- Copyright (c) 2015 Piotr Orzechowski [drzewo.org]. See LICENSE.
--- vCard 2.1, 3.0 and 4.0 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 = 'vcard'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Required properties.
-local required_property = token(l.KEYWORD, word_match({
-  'BEGIN', 'END', 'FN', 'N' --[[ Not required in v4.0. ]], 'VERSION'
-}, nil, true)) * #P(':')
-
--- Supported properties.
-local supported_property = token(l.TYPE, word_match({
-  'ADR', 'AGENT' --[[ Not supported in v4.0. ]],
-  'ANNIVERSARY' --[[ Supported in v4.0 only. ]], 'BDAY',
-  'CALADRURI' --[[ Supported in v4.0 only. ]],
-  'CALURI' --[[ Supported in v4.0 only. ]], 'CATEGORIES',
-  'CLASS' --[[ Supported in v3.0 only. ]],
-  'CLIENTPIDMAP' --[[ Supported in v4.0 only. ]], 'EMAIL', 'END',
-  'FBURL' --[[ Supported in v4.0 only. ]],
-  'GENDER' --[[ Supported in v4.0 only. ]], 'GEO',
-  'IMPP' --[[ Not supported in v2.1. ]], 'KEY',
-  'KIND' --[[ Supported in v4.0 only. ]],
-  'LABEL' --[[ Not supported in v4.0. ]],
-  'LANG' --[[ Supported in v4.0 only. ]], 'LOGO',
-  'MAILER' --[[ Not supported in v4.0. ]],
-  'MEMBER' --[[ Supported in v4.0 only. ]],
-  'NAME' --[[ Supported in v3.0 only. ]],
-  'NICKNAME' --[[ Not supported in v2.1. ]], 'NOTE', 'ORG', 'PHOTO',
-  'PRODID' --[[ Not supported in v2.1. ]],
-  'PROFILE' --[[ Not supported in v4.0. ]],
-  'RELATED' --[[ Supported in v4.0 only. ]], 'REV', 'ROLE',
-  'SORT-STRING' --[[ Not supported in v4.0. ]], 'SOUND', 'SOURCE', 'TEL',
-  'TITLE', 'TZ', 'UID', 'URL', 'XML' --[[ Supported in v4.0 only. ]]
-}, nil, true)) * #S(':;')
-
-local identifier = l.alpha^1 * l.digit^0 * (P('-') * l.alnum^1)^0
-
--- Extension.
-local extension = token(l.TYPE,
-                        l.starts_line(S('xX') * P('-') * identifier * #S(':;')))
-
--- Parameter.
-local parameter = token(l.IDENTIFIER, l.starts_line(identifier * #S(':='))) +
-                  token(l.STRING, identifier) * #S(':=')
-
--- Operators.
-local operator = token(l.OPERATOR, S('.:;='))
-
--- Group and property.
-local group_sequence = token(l.CONSTANT, l.starts_line(identifier)) *
-                       token(l.OPERATOR, P('.')) *
-                       (required_property + supported_property +
-                        l.token(l.TYPE, S('xX') * P('-') * identifier) *
-                       #S(':;'))
--- Begin vCard, end vCard.
-local begin_sequence = token(l.KEYWORD, P('BEGIN')) *
-                       token(l.OPERATOR, P(':')) * token(l.COMMENT, P('VCARD'))
-local end_sequence = token(l.KEYWORD, P('END')) * token(l.OPERATOR, P(':')) *
-                     token(l.COMMENT, P('VCARD'))
-
--- vCard version (in v3.0 and v4.0 must appear immediately after BEGIN:VCARD).
-local version_sequence = token(l.KEYWORD, P('VERSION')) *
-                         token(l.OPERATOR, P(':')) *
-                         token(l.CONSTANT, l.digit^1 * (P('.') * l.digit^1)^-1)
-
--- Data.
-local data = token(l.IDENTIFIER, l.any)
-
--- Rules.
-M._rules = {
-  {'whitespace', ws},
-  {'begin_sequence', begin_sequence},
-  {'end_sequence', end_sequence},
-  {'version_sequence', version_sequence},
-  {'group_sequence', group_sequence},
-  {'required_property', required_property},
-  {'supported_property', supported_property},
-  {'extension', extension},
-  {'parameter', parameter},
-  {'operator', operator},
-  {'data', data},
-}
-
--- Folding.
-M._foldsymbols = {
-  _patterns = {'BEGIN', 'END'},
-  [l.KEYWORD] = {['BEGIN'] = 1, ['END'] = -1}
-}
-
-return M