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, 82 insertions, 0 deletions

diff --git a/lua/lexers/applescript.lua b/lua/lexers/applescript.lua
new file mode 100644
index 0000000..07cf1d3
--- /dev/null
+++ b/lua/lexers/applescript.lua
@@ -0,0 +1,82 @@
+-- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
+-- Applescript 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 = 'applescript'}
+
+-- Whitespace.
+local ws = token(l.WHITESPACE, l.space^1)
+
+-- Comments.
+local line_comment = '--' * l.nonnewline^0
+local block_comment = '(*' * (l.any - '*)')^0 * P('*)')^-1
+local comment = token(l.COMMENT, line_comment + block_comment)
+
+-- Strings.
+local string = token(l.STRING, l.delimited_range('"', true))
+
+-- Numbers.
+local number = token(l.NUMBER, l.float + l.integer)
+
+-- Keywords.
+local keyword = token(l.KEYWORD, word_match({
+  'script', 'property', 'prop', 'end', 'copy', 'to', 'set', 'global', 'local',
+  'on', 'to', 'of', 'in', 'given', 'with', 'without', 'return', 'continue',
+  'tell', 'if', 'then', 'else', 'repeat', 'times', 'while', 'until', 'from',
+  'exit', 'try', 'error', 'considering', 'ignoring', 'timeout', 'transaction',
+  'my', 'get', 'put', 'into', 'is',
+  -- References.
+  'each', 'some', 'every', 'whose', 'where', 'id', 'index', 'first', 'second',
+  'third', 'fourth', 'fifth', 'sixth', 'seventh', 'eighth', 'ninth', 'tenth',
+  'last', 'front', 'back', 'st', 'nd', 'rd', 'th', 'middle', 'named', 'through',
+  'thru', 'before', 'after', 'beginning', 'the',
+  -- Commands.
+  'close', 'copy', 'count', 'delete', 'duplicate', 'exists', 'launch', 'make',
+  'move', 'open', 'print', 'quit', 'reopen', 'run', 'save', 'saving',
+  -- Operators.
+  'div', 'mod', 'and', 'not', 'or', 'as', 'contains', 'equal', 'equals',
+  'isn\'t',
+}, "'", true))
+
+-- Constants.
+local constant = token(l.CONSTANT, word_match({
+  'case', 'diacriticals', 'expansion', 'hyphens', 'punctuation',
+  -- Predefined variables.
+  'it', 'me', 'version', 'pi', 'result', 'space', 'tab', 'anything',
+  -- Text styles.
+  'bold', 'condensed', 'expanded', 'hidden', 'italic', 'outline', 'plain',
+  'shadow', 'strikethrough', 'subscript', 'superscript', 'underline',
+  -- Save options.
+  'ask', 'no', 'yes',
+  -- Booleans.
+  'false', 'true',
+  -- Date and time.
+  'weekday', 'monday', 'mon', 'tuesday', 'tue', 'wednesday', 'wed', 'thursday',
+  'thu', 'friday', 'fri', 'saturday', 'sat', 'sunday', 'sun', 'month',
+  'january', 'jan', 'february', 'feb', 'march', 'mar', 'april', 'apr', 'may',
+  'june', 'jun', 'july', 'jul', 'august', 'aug', 'september', 'sep', 'october',
+  'oct', 'november', 'nov', 'december', 'dec', 'minutes', 'hours', 'days',
+  'weeks'
+}, nil, true))
+
+-- Identifiers.
+local identifier = token(l.IDENTIFIER, (l.alpha + '_') * l.alnum^0)
+
+-- Operators.
+local operator = token(l.OPERATOR, S('+-^*/&<>=:,(){}'))
+
+M._rules = {
+  {'whitespace', ws},
+  {'keyword', keyword},
+  {'constant', constant},
+  {'identifier', identifier},
+  {'string', string},
+  {'comment', comment},
+  {'number', number},
+  {'operator', operator},
+}
+
+return M