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, 270 deletions

diff --git a/lexers/texinfo.lua b/lexers/texinfo.lua
deleted file mode 100644
index 34f9eb2..0000000
--- a/lexers/texinfo.lua
+++ /dev/null
@@ -1,270 +0,0 @@
--- Copyright 2014-2016 stef@ailleurs.land. See LICENSE.
--- Plain Texinfo version 5.2 LPeg lexer
--- Freely inspired from Mitchell work and valuable help from him too !
-
--- Directives are processed (more or less) in the Reference Card Texinfo order
--- Reference Card page for each directive group is in comment for reference
-
---[[
-Note: Improving Fold Points use with Texinfo
-
-At the very beginning of your Texinfo file, it could be wised to insert theses
-alias :
-
-@alias startchapter = comment
-@alias endchapter = comment
-
-Then use this to begin each chapter :
-
-@endchapter --------------------------------------------------------------------
-@chapter CHAPTER TITLE
-@startchapter ------------------------------------------------------------------
-
-With the use of Scintilla's `SCI_FOLDALL(SC_FOLDACTION_TOGGLE)` or Textadept's
-`buffer:fold_all(buffer.FOLDACTION_TOGGLE)`, you have then a nice chapter
-folding, useful with large documents.
-]]
-
-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 = 'texinfo'}
-
--------------------------------------------------------------------------------
--- Common processing
--------------------------------------------------------------------------------
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Comments.
-local line_comment = '@c' * l.nonnewline_esc^0
---local line_comment_long = '@comment' * l.nonnewline_esc^0
-local block_comment = '@ignore' * (l.any - '@end ignore')^0 *
-                      P('@end ignore')^-1
-local comment = token(l.COMMENT, line_comment + block_comment)
-
--- Strings.
-local string = token(l.STRING, l.delimited_range('{}', false, true, true))
-
--- Numbers.
-local number = token(l.NUMBER, l.float + l.integer)
-
--- Identifiers
-local identifier = token(l.IDENTIFIER, l.word)
-
--------------------------------------------------------------------------------
--- Common keywords
--------------------------------------------------------------------------------
-
-local keyword_base = word_match({
-  'end',
-  -- Beginning a Texinfo document (page 1, column 1)
-  'setfilename', 'settitle', 'insertcopying',
-  -- Beginning a Texinfo document > Internationlization (page 1, column 1)
-  'documentencoding', 'documentlanguage', 'frenchspacing',
-  -- Beginning a Texinfo document > Info directory specification and HTML
-  -- document description (page 1, column 1)
-  'dircategory', 'direntry', 'documentdescription',
-  -- Beginning a Texinfo document > Titre pages (page 1, column 1)
-  'shorttitlepage', 'center', 'titlefont', 'title', 'subtitle', 'author',
-  -- Beginning a Texinfo document > Tables of contents (page 1, column 2)
-  'shortcontents', 'summarycontents', 'contents', 'setcontentsaftertitlepage',
-  'setshortcontentsaftertitlepage',
-  -- Nodes (page 1, column 2)
-  'node', 'top', 'anchor', 'novalidate',
-  -- Menus (page 1, column 2)
-  'menu', 'detailmenu',
-  -- Cross references > Within the Info system (page 1, column 3)
-  'xref', 'pxref', 'ref', 'inforef', 'xrefautomaticsectiontitle',
-  -- Cross references > Outside of info (page 1, column 3)
-  'url', 'cite',
-  -- Marking text > Markup for regular text (page 1, column 3)
-  'var', 'dfn', 'acronym', 'abbr',
-  -- Marking text > Markup for litteral text (page 1, column 3)
-  'code', 'file', 'command', 'env', 'option', 'kbd', 'key', 'email',
-  'indicateurl', 'samp', 'verb',
-  -- Marking text > GUI sequences (page 2, column 1)
-  'clicksequence', 'click', 'clickstyle', 'arrow',
-  -- Marking text > Math (page 2, column 1)
-  'math', 'minus', 'geq', 'leq',
-  -- Marking text > Explicit font selection (page 2, column 1)
-  'sc', 'r', 'i', 'slanted', 'b', 'sansserif', 't',
-  -- Block environments (page 2, column 1)
-  'noindent', 'indent', 'exdent',
-  -- Block environments > Normally filled displays using regular text fonts
-  -- (page 2, column 1)
-  'quotation', 'smallquotation', 'indentedblock', 'smallindentedblock',
-  'raggedright',
-  -- Block environments > Line-for-line displays using regular test fonts (page
-  -- 2, column 2)
-  'format', 'smallformat', 'display', 'smalldisplay', 'flushleft', 'flushright',
-  -- Block environments > Displays using fixed-width fonts (page 2, column 2)
-  'lisp', 'smalllisp', 'verbatim',
-  -- List and tables (page 2, column 2)
-  'table', 'ftable', 'vtable', 'tab', 'item', 'itemx', 'headitem',
-  'headitemfont', 'asis',
-  -- Indices (page 2, column 3)
-  'cindex', 'findex', 'vindex', 'kindex', 'pindex', 'tindex', 'defcodeindex',
-  'syncodeindex', 'synindex', 'printindex',
-  -- Insertions within a paragraph > Characters special to Texinfo (page 2,
-  -- column 3)
-  '@', '{', '}', 'backslashcar', 'comma', 'hashcar', ':', '.', '?', '!', 'dmn',
-  -- Insertions within a paragraph > Accents (page 3, column 1)
-  -- not implemented
-  -- Insertions within a paragraph > Non-English characters (page 3, column 1)
-  -- not implemented
-  -- Insertions within a paragraph > Other text characters an logos (page 3,
-  -- column 1)
-  'bullet', 'dots', 'enddots', 'euro', 'pounds', 'textdegree', 'copyright',
-  'registeredsymbol', 'TeX', 'LaTeX', 'today',
-  'guillemetleft', 'guillementright', 'guillemotleft', 'guillemotright',
-  -- Insertions within a paragraph > Glyphs for code examples (page 3, column 2)
-  'equiv', 'error', 'expansion', 'point', 'print', 'result',
-  -- Making and preventing breaks (page 3, column 2)
-  '*', '/', '-', 'hyphenation', 'tie', 'w', 'refill',
-  -- Vertical space (page 3, column 2)
-  'sp', 'page', 'need', 'group', 'vskip'
-  -- Definition commands (page 3, column 2)
-  -- not implemented
-}, nil, true)
-
-local keyword = token(l.KEYWORD, ('@end' * l.space^1 + '@') * keyword_base)
-
--------------------------------------------------------------------------------
--- Chapter structuring Keywords
--------------------------------------------------------------------------------
-
-local chapters_base = word_match({
-  -- Chapter structuring (page 1, column 2)
-  'lowersections', 'raisesections', 'part',
-  -- Chapter structuring > Numbered, included in contents (page 1, column 2)
-  'chapter', 'centerchap',
-  -- Chapter structuring > Context-dependent, included in contents (page 1,
-  -- column 2)
-  'section', 'subsection', 'subsubsection',
-  -- Chapter structuring > Unumbered, included in contents (page 1, column 2)
-  'unnumbered', 'unnumberedsec', 'unnumberedsubsec', 'unnumberedsubsection',
-  'unnumberedsubsubsec', 'unnumberedsubsubsection',
-  -- Chapter structuring > Letter and numbered, included in contents (page 1,
-  -- column 2)
-  'appendix', 'appendixsec', 'appendixsection', 'appendixsubsec',
-  'appendixsubsection', 'appendixsubsubsec', 'appendixsubsubsection',
-  -- Chapter structuring > Unumbered, not included in contents, no new page
-  -- (page 1, column 3)
-  'chapheading', 'majorheading', 'heading', 'subheading', 'subsubheading'
-}, nil, true)
-
-local chapters = token('chapters', ('@end' * l.space^1 + '@') * chapters_base)
-
--------------------------------------------------------------------------------
--- Directives Keywords
--------------------------------------------------------------------------------
-
-local directives_base = word_match({
-  'end',
-  -- Custom keywords for chapter folding
-  'startchapter', 'endchapter',
-  -- List and tables (page 2, column 2)
-  'itemize', 'enumerate',
-  -- Beginning a Texinfo document (page 1, column 1)
-  'titlepage', 'copying',
-  -- Block environments (page 2, column 1)
-  'cartouche',
-  -- Block environments > Displays using fixed-width fonts (page 2, column 2)
-  'example', 'smallexample',
-  -- List and tables (page 2, column 2)
-  'multitable',
-  -- Floating Displays (page 2, column 3)
-  'float', 'listoffloats', 'caption', 'shortcaption', 'image',
-  -- Floating Displays > Footnotes (page 2, column 3)
-  'footnote', 'footnotestyle',
-  -- Conditionally (in)visible text > Output formats (page 3, column 3)
-  'ifdocbook', 'ifhtml', 'ifinfo', 'ifplaintext', 'iftex', 'ifxml',
-  'ifnotdocbook', 'ifnothtml', 'ifnotplaintext',
-  'ifnottex', 'ifnotxml', 'ifnotinfo', 'inlinefmt', 'inlinefmtifelse',
-  -- Conditionally (in)visible text > Raw formatter text (page 4, column 1)
-  'docbook', 'html', 'tex', 'xml', 'inlineraw',
-  -- Conditionally (in)visible text > Documents variables (page 4, column 1)
-  'set', 'clear', 'value', 'ifset', 'ifclear', 'inlineifset', 'inlineifclear',
-  -- Conditionally (in)visible text > Testing for commands (page 4, column 1)
-  'ifcommanddefined', 'ifcommandnotdefined', 'end',
-  -- Defining new Texinfo commands (page 4, column 1)
-  'alias', 'macro', 'unmacro', 'definfounclose',
-  -- File inclusion (page 4, column 1)
-  'include', 'verbatiminclude',
-  -- Formatting and headers footers for TeX (page 4, column 1)
-  'allowcodebreaks', 'finalout', 'fonttextsize',
-  -- Formatting and headers footers for TeX > paper size (page 4, column 2)
-  'smallbook', 'afourpaper', 'afivepaper', 'afourlatex', 'afourwide',
-  'pagesizes',
-  -- Formatting and headers footers for TeX > Page headers and footers (page 4,
-  -- column 2)
-  -- not implemented
-  -- Document preferences (page 4, column 2)
-  -- not implemented
-  -- Ending a Texinfo document (page 4, column 2)
-  'bye'
-}, nil, case_insensitive_tags)
-
-local directives = token('directives',
-                         ('@end' * l.space^1 + '@') * directives_base)
-
--------------------------------------------------------------------------------
--- Special keywords
--------------------------------------------------------------------------------
-
--- Italics
-local emph = token('emph', '@emph' * l.delimited_range('{}', false, true, true))
-
--- Bold
-local strong = token('strong',
-                     '@strong' * l.delimited_range('{}', false, true, true))
-
--------------------------------------------------------------------------------
--- Rules, Tokenstyles and Folds points
--------------------------------------------------------------------------------
-
-M._rules = {
-  {'whitespace', ws},
-  {'directives', directives},
-  {'chapters', chapters},
-  {'keyword', keyword},
-  {'emph', emph},
-  {'strong', strong},
-  {'identifier', identifier},
-  {'string', string},
-  {'number', number},
-  {'comment', comment},
-}
-
-M._tokenstyles = {
-  directives = l.STYLE_FUNCTION,
-  chapters = l.STYLE_CLASS,
-  emph = l.STYLE_STRING..',italics',
-  strong = l.STYLE_STRING..',bold'
-}
-
-M._foldsymbols = {
-  _patterns = {'@end %l+', '@%l+'},
-  directives = {
-    ['@titlepage'] = 1, ['@end titlepage'] = -1,
-    ['@copying'] = 1, ['@end copying'] = -1,
-
-    ['@ifset'] = 1, ['@end ifset'] = -1,
-    ['@tex'] = 1, ['@end tex'] = -1,
-
-    ['@itemize'] = 1, ['@end itemize'] = -1,
-    ['@enumerate'] = 1, ['@end enumerate'] = -1,
-    ['@multitable'] = 1, ['@end multitable'] = -1,
-
-    ['@example'] = 1, ['@end example'] = -1,
-    ['@smallexample'] = 1, ['@end smallexample'] = -1,
-    ['@cartouche'] = 1, ['@end cartouche'] = -1,
-
-    ['@startchapter'] = 1, ['@endchapter'] = -1,
-  }
-}
-
-return M