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, 569 deletions

diff --git a/lexers/fstab.lua b/lexers/fstab.lua
deleted file mode 100644
index fd0df74..0000000
--- a/lexers/fstab.lua
+++ /dev/null
@@ -1,569 +0,0 @@
--- Copyright 2016 Christian Hesse
--- fstab 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 = 'fstab'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Comments.
-local comment = token(l.COMMENT, l.starts_line('#') * l.nonnewline^0)
-
--- Numbers.
-local dec = l.digit^1 * ('_' * l.digit^1)^0
-local oct_num = '0' * S('01234567_')^1
-local integer = S('+-')^-1 * (l.hex_num + oct_num + dec)
-local number = token(l.NUMBER, (l.float + integer))
-
--- Keywords.
-local keyword = token(l.KEYWORD, word_match({
-  -- basic filesystem-independent mount options
-  'async',
-  'atime',
-  'auto',
-  'comment',
-  'context',
-  'defaults',
-  'defcontext',
-  'dev',
-  'dirsync',
-  'exec',
-  'fscontext',
-  'group',
-  'iversion',
-  'lazytime',
-  'loud',
-  'mand',
-  '_netdev',
-  'noatime',
-  'noauto',
-  'nodev',
-  'nodiratime',
-  'noexec',
-  'nofail',
-  'noiversion',
-  'nolazytime',
-  'nomand',
-  'norelatime',
-  'nostrictatime',
-  'nosuid',
-  'nouser',
-  'owner',
-  'relatime',
-  'remount',
-  'ro',
-  'rootcontext',
-  'rw',
-  'silent',
-  'strictatime',
-  'suid',
-  'sync',
-  'user',
-  'users',
-
-  -- mount options for systemd, see systemd.mount(5)
-  'x-systemd.automount',
-  'x-systemd.device-timeout',
-  'x-systemd.idle-timeout',
-  'x-systemd.mount-timeout',
-  'x-systemd.requires',
-  'x-systemd.requires-mounts-for',
-  'x-initrd.mount',
-
-  -- mount options for adfs
-  'uid',
-  'gid',
-  'ownmask',
-  'othmask',
-
-  -- mount options for affs
-  'uid',
-  'gid',
-  'setuid',
-  'setgid',
-  'mode',
-  'protect',
-  'usemp',
-  'verbose',
-  'prefix',
-  'volume',
-  'reserved',
-  'root',
-  'bs',
-  'grpquota',
-  'noquota',
-  'quota',
-  'usrquota',
-
-  -- mount options for btrfs
-  'alloc_start',
-  'autodefrag',
-  'check_int',
-  'check_int_data',
-  'check_int_print_mask',
-  'commit',
-  'compress',
-    'zlib',
-    'lzo',
-    'no',
-  'compress-force',
-  'degraded',
-  'device',
-  'discard',
-  'enospc_debug',
-  'fatal_errors',
-    'bug',
-    'panic',
-  'flushoncommit',
-  'inode_cache',
-  'max_inline',
-  'metadata_ratio',
-  'noacl',
-  'nobarrier',
-  'nodatacow',
-  'nodatasum',
-  'notreelog',
-  'recovery',
-  'rescan_uuid_tree',
-  'skip_balance',
-  'nospace_cache',
-  'clear_cache',
-  'ssd',
-  'nossd',
-  'ssd_spread',
-  'subvol',
-  'subvolid',
-  'subvolrootid',
-  'thread_pool',
-  'user_subvol_rm_allowed',
-
-  -- mount options for devpts
-  'uid',
-  'gid',
-  'mode',
-  'newinstance',
-  'ptmxmode',
-
-  -- mount options for ext2
-  'acl',
-  'noacl',
-  'bsddf',
-  'minixdf',
-  'check',
-  'nocheck',
-  'debug',
-  'errors',
-    'continue',
-    'remount-ro',
-    'panic',
-  'grpid',
-  'bsdgroups',
-  'nogrpid',
-  'sysvgroups',
-  'grpquota',
-  'noquota',
-  'quota',
-  'usrquota',
-  'nouid32',
-  'oldalloc',
-  'orlov',
-  'resgid',
-  'resuid',
-  'sb',
-  'user_xattr',
-  'nouser_xattr',
-
-  -- mount options for ext3
-  'journal',
-    'update',
-  'journal_dev',
-  'journal_path',
-  'norecoverynoload',
-  'data',
-    'journal',
-    'ordered',
-    'writeback',
-  'data_err',
-    'ignore',
-    'abort',
-  'barrier',
-  'commit',
-  'user_xattr',
-  'acl',
-  'usrjquota',
-  'grpjquota',
-  'jqfmt',
-
-  -- mount options for ext4
-  'journal_checksum',
-  'journal_async_commit',
-  'barrier',
-  'nobarrier',
-  'inode_readahead_blks',
-  'stripe',
-  'delalloc',
-  'nodelalloc',
-  'max_batch_time',
-  'min_batch_time',
-  'journal_ioprio',
-  'abort',
-  'auto_da_alloc',
-  'noauto_da_alloc',
-  'noinit_itable',
-  'init_itable',
-  'discard',
-  'nodiscard',
-  'nouid32',
-  'block_validity',
-  'noblock_validity',
-  'dioread_lock',
-  'dioread_nolock',
-  'max_dir_size_kb',
-  'i_version',
-
-  -- mount options for fat (common part of msdos, umsdos and vfat)
-  'blocksize',
-  'uid',
-  'gid',
-  'umask',
-  'dmask',
-  'fmask',
-  'allow_utime',
-  'check',
-    'relaxed',
-    'normal',
-    'strict',
-  'codepage',
-  'conv',
-    'binary',
-    'text',
-    'auto',
-  'cvf_format',
-  'cvf_option',
-  'debug',
-  'discard',
-  'dos1xfloppy',
-  'errors',
-    'panic',
-    'continue',
-    'remount-ro',
-  'fat',
-  'iocharset',
-  'nfs',
-    'stale_rw',
-    'nostale_ro',
-  'tz',
-  'time_offset',
-  'quiet',
-  'rodir',
-  'showexec',
-  'sys_immutable',
-  'flush',
-  'usefree',
-  'dots',
-  'nodots',
-  'dotsOK',
-
-  -- mount options for hfs
-  'creator',
-  'type',
-  'uid',
-  'gid',
-  'dir_umask',
-  'file_umask',
-  'umask',
-  'session',
-  'part',
-  'quiet',
-
-  -- mount options for hpfs
-  'uid',
-  'gid',
-  'umask',
-  'case',
-    'lower',
-    'asis',
-  'conv',
-    'binary',
-    'text',
-    'auto',
-  'nocheck',
-
-  -- mount options for iso9660
-  'norock',
-  'nojoliet',
-  'check',
-    'relaxed',
-    'strict',
-  'uid',
-  'gid',
-  'map',
-    'normal',
-    'offacorn',
-  'mode',
-  'unhide',
-  'block',
-  'conv',
-    'auto',
-    'binary',
-    'mtext',
-    'text',
-  'cruft',
-  'session',
-  'sbsector',
-  'iocharset',
-  'utf8',
-
-  -- mount options for jfs
-  'iocharset',
-  'resize',
-  'nointegrity',
-  'integrity',
-  'errors',
-    'continue',
-    'remount-ro',
-    'panic',
-  'noquota',
-  'quota',
-  'usrquota',
-  'grpquota',
-
-  -- mount options for ntfs
-  'iocharset',
-  'nls',
-  'utf8',
-  'uni_xlate',
-  'posix',
-  'uid',
-  'gid',
-  'umask',
-
-  -- mount options for overlay
-  'lowerdir',
-  'upperdir',
-  'workdir',
-
-  -- mount options for reiserfs
-  'conv',
-  'hash',
-    'rupasov',
-    'tea',
-    'r5',
-    'detect',
-  'hashed_relocation',
-  'no_unhashed_relocation',
-  'noborder',
-  'nolog',
-  'notail',
-  'replayonly',
-  'resize',
-  'user_xattr',
-  'acl',
-  'barrier',
-    'none',
-    'flush',
-
-  -- mount options for tmpfs
-  'size',
-  'nr_blocks',
-  'nr_inodes',
-  'mode',
-  'uid',
-  'gid',
-  'mpol',
-    'default',
-    'prefer',
-    'bind',
-    'interleave',
-
-  -- mount options for ubifs
-  'bulk_read',
-  'no_bulk_read',
-  'chk_data_crc',
-  'no_chk_data_crc.',
-  'compr',
-    'none',
-    'lzo',
-    'zlib',
-
-  -- mount options for udf
-  'gid',
-  'umask',
-  'uid',
-  'unhide',
-  'undelete',
-  'nostrict',
-  'iocharset',
-  'bs',
-  'novrs',
-  'session',
-  'anchor',
-  'volume',
-  'partition',
-  'lastblock',
-  'fileset',
-  'rootdir',
-
-  -- mount options for ufs
-  'ufstype',
-     'old',
-     '44bsd',
-     'ufs2',
-     '5xbsd',
-     'sun',
-     'sunx86',
-     'hp',
-     'nextstep',
-     'nextstep-cd',
-     'openstep',
-  'onerror',
-    'lock',
-    'umount',
-    'repair',
-
-  -- mount options for vfat
-  'uni_xlate',
-  'posix',
-  'nonumtail',
-  'utf8',
-  'shortname',
-    'lower',
-    'win95',
-    'winnt',
-    'mixed',
-
-  -- mount options for usbfs
-  'devuid',
-  'devgid',
-  'devmode',
-  'busuid',
-  'busgid',
-  'busmode',
-  'listuid',
-  'listgid',
-  'listmode',
-
-  -- filesystems
-  'adfs',
-  'ados',
-  'affs',
-  'anon_inodefs',
-  'atfs',
-  'audiofs',
-  'auto',
-  'autofs',
-  'bdev',
-  'befs',
-  'bfs',
-  'btrfs',
-  'binfmt_misc',
-  'cd9660',
-  'cfs',
-  'cgroup',
-  'cifs',
-  'coda',
-  'configfs',
-  'cpuset',
-  'cramfs',
-  'devfs',
-  'devpts',
-  'devtmpfs',
-  'e2compr',
-  'efs',
-  'ext2',
-  'ext2fs',
-  'ext3',
-  'ext4',
-  'fdesc',
-  'ffs',
-  'filecore',
-  'fuse',
-  'fuseblk',
-  'fusectl',
-  'hfs',
-  'hpfs',
-  'hugetlbfs',
-  'iso9660',
-  'jffs',
-  'jffs2',
-  'jfs',
-  'kernfs',
-  'lfs',
-  'linprocfs',
-  'mfs',
-  'minix',
-  'mqueue',
-  'msdos',
-  'ncpfs',
-  'nfs',
-  'nfsd',
-  'nilfs2',
-  'none',
-  'ntfs',
-  'null',
-  'nwfs',
-  'overlay',
-  'ovlfs',
-  'pipefs',
-  'portal',
-  'proc',
-  'procfs',
-  'pstore',
-  'ptyfs',
-  'qnx4',
-  'reiserfs',
-  'ramfs',
-  'romfs',
-  'securityfs',
-  'shm',
-  'smbfs',
-  'squashfs',
-  'sockfs',
-  'sshfs',
-  'std',
-  'subfs',
-  'swap',
-  'sysfs',
-  'sysv',
-  'tcfs',
-  'tmpfs',
-  'udf',
-  'ufs',
-  'umap',
-  'umsdos',
-  'union',
-  'usbfs',
-  'userfs',
-  'vfat',
-  'vs3fs',
-  'vxfs',
-  'wrapfs',
-  'wvfs',
-  'xenfs',
-  'xfs',
-  'zisofs',
-}, '.-'))
-
--- Identifiers.
-local word = (l.alpha + '_') * (l.alnum + S('_.'))^0
-local identifier = token(l.IDENTIFIER, word)
-
--- Operators.
-local operator = token(l.OPERATOR, S('=,'))
-
-M._rules = {
-  {'whitespace', ws},
-  {'keyword', keyword},
-  {'identifier', identifier},
-  {'comment', comment},
-  {'number', number},
-  {'operator', operator},
-}
-
-M._LEXBYLINE = true
-
-return M