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, 102 deletions

diff --git a/lexers/apdl.lua b/lexers/apdl.lua
deleted file mode 100644
index 1c91a08..0000000
--- a/lexers/apdl.lua
+++ /dev/null
@@ -1,102 +0,0 @@
--- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
--- APDL 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 = 'apdl'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Comments.
-local comment = token(l.COMMENT, '!' * l.nonnewline^0)
-
--- Strings.
-local string = token(l.STRING, l.delimited_range("'", true, true))
-
--- Numbers.
-local number = token(l.NUMBER, l.float + l.integer)
-
--- Keywords.
-local keyword = token(l.KEYWORD, word_match({
-  '*abbr', '*abb', '*afun', '*afu', '*ask', '*cfclos', '*cfc', '*cfopen',
-  '*cfo', '*cfwrite', '*cfw', '*create', '*cre', '*cycle', '*cyc', '*del',
-  '*dim', '*do', '*elseif', '*else', '*enddo', '*endif', '*end', '*eval',
-  '*eva', '*exit', '*exi', '*get', '*go', '*if', '*list', '*lis', '*mfouri',
-  '*mfo', '*mfun', '*mfu', '*mooney', '*moo', '*moper', '*mop', '*msg',
-  '*repeat', '*rep', '*set', '*status', '*sta', '*tread', '*tre', '*ulib',
-  '*uli', '*use', '*vabs', '*vab', '*vcol', '*vco', '*vcum', '*vcu', '*vedit',
-  '*ved', '*vfact', '*vfa', '*vfill', '*vfi', '*vfun', '*vfu', '*vget', '*vge',
-  '*vitrp', '*vit', '*vlen', '*vle', '*vmask', '*vma', '*voper', '*vop',
-  '*vplot', '*vpl', '*vput', '*vpu', '*vread', '*vre', '*vscfun', '*vsc',
-  '*vstat', '*vst', '*vwrite', '*vwr', '/anfile', '/anf', '/angle', '/ang',
-  '/annot', '/ann', '/anum', '/anu', '/assign', '/ass', '/auto', '/aut',
-  '/aux15', '/aux2', '/aux', '/axlab', '/axl', '/batch', '/bat', '/clabel',
-  '/cla', '/clear', '/cle', '/clog', '/clo', '/cmap', '/cma', '/color', '/col',
-  '/com', '/config', '/contour', '/con', '/copy', '/cop', '/cplane', '/cpl',
-  '/ctype', '/cty', '/cval', '/cva', '/delete', '/del', '/devdisp', '/device',
-  '/dev', '/dist', '/dis', '/dscale', '/dsc', '/dv3d', '/dv3', '/edge', '/edg',
-  '/efacet', '/efa', '/eof', '/erase', '/era', '/eshape', '/esh', '/exit',
-  '/exi', '/expand', '/exp', '/facet', '/fac', '/fdele', '/fde', '/filname',
-  '/fil', '/focus', '/foc', '/format', '/for', '/ftype', '/fty', '/gcmd',
-  '/gcm', '/gcolumn', '/gco', '/gfile', '/gfi', '/gformat', '/gfo', '/gline',
-  '/gli', '/gmarker', '/gma', '/golist', '/gol', '/gopr', '/gop', '/go',
-  '/graphics', '/gra', '/gresume', '/gre', '/grid', '/gri', '/gropt', '/gro',
-  '/grtyp', '/grt', '/gsave', '/gsa', '/gst', '/gthk', '/gth', '/gtype', '/gty',
-  '/header', '/hea', '/input', '/inp', '/larc', '/lar', '/light', '/lig',
-  '/line', '/lin', '/lspec', '/lsp', '/lsymbol', '/lsy', '/menu', '/men',
-  '/mplib', '/mpl', '/mrep', '/mre', '/mstart', '/mst', '/nerr', '/ner',
-  '/noerase', '/noe', '/nolist', '/nol', '/nopr', '/nop', '/normal', '/nor',
-  '/number', '/num', '/opt', '/output', '/out', '/page', '/pag', '/pbc', '/pbf',
-  '/pcircle', '/pci', '/pcopy', '/pco', '/plopts', '/plo', '/pmacro', '/pma',
-  '/pmeth', '/pme', '/pmore', '/pmo', '/pnum', '/pnu', '/polygon', '/pol',
-  '/post26', '/post1', '/pos', '/prep7', '/pre', '/psearch', '/pse', '/psf',
-  '/pspec', '/psp', '/pstatus', '/pst', '/psymb', '/psy', '/pwedge', '/pwe',
-  '/quit', '/qui', '/ratio', '/rat', '/rename', '/ren', '/replot', '/rep',
-  '/reset', '/res', '/rgb', '/runst', '/run', '/seclib', '/sec', '/seg',
-  '/shade', '/sha', '/showdisp', '/show', '/sho', '/shrink', '/shr', '/solu',
-  '/sol', '/sscale', '/ssc', '/status', '/sta', '/stitle', '/sti', '/syp',
-  '/sys', '/title', '/tit', '/tlabel', '/tla', '/triad', '/tri', '/trlcy',
-  '/trl', '/tspec', '/tsp', '/type', '/typ', '/ucmd', '/ucm', '/uis', '/ui',
-  '/units', '/uni', '/user', '/use', '/vcone', '/vco', '/view', '/vie',
-  '/vscale', '/vsc', '/vup', '/wait', '/wai', '/window', '/win', '/xrange',
-  '/xra', '/yrange', '/yra', '/zoom', '/zoo'
-}, '*/', true))
-
--- Identifiers.
-local identifier = token(l.IDENTIFIER, l.word)
-
--- Functions.
-local func = token(l.FUNCTION, l.delimited_range('%', true, true))
-
--- Operators.
-local operator = token(l.OPERATOR, S('+-*/$=,;()'))
-
--- Labels.
-local label = token(l.LABEL, l.starts_line(':') * l.word)
-
-M._rules = {
-  {'whitespace', ws},
-  {'keyword', keyword},
-  {'identifier', identifier},
-  {'string', string},
-  {'number', number},
-  {'function', func},
-  {'label', label},
-  {'comment', comment},
-  {'operator', operator},
-}
-
-M._foldsymbols = {
-  _patterns = {'%*[A-Za-z]+', '!'},
-  [l.KEYWORD] = {
-    ['*if'] = 1, ['*IF'] = 1, ['*do'] = 1, ['*DO'] = 1, ['*dowhile'] = 1,
-    ['*DOWHILE'] = 1,
-    ['*endif'] = -1, ['*ENDIF'] = -1, ['*enddo'] = -1, ['*ENDDO'] = -1
-  },
-  [l.COMMENT] = {['!'] = l.fold_line_comments('!')}
-}
-
-return M