lexer: add systemd unit file LPeg lexer

1 files changed, 436 insertions, 0 deletions

diff --git a/lexers/systemd.lua b/lexers/systemd.lua
new file mode 100644
index 0000000..17bf96e
--- /dev/null
+++ b/lexers/systemd.lua
@@ -0,0 +1,436 @@
+-- Copyright 2016 Christian Hesse
+-- systemd unit file 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 = 'systemd'}
+
+-- Whitespace.
+local ws = token(l.WHITESPACE, l.space^1)
+
+-- Comments.
+local comment = token(l.COMMENT, l.starts_line(S(';#')) * l.nonnewline^0)
+
+-- Strings.
+local sq_str = l.delimited_range("'")
+local dq_str = l.delimited_range('"')
+--local label = l.delimited_range('[]', true, true)
+local section_word = word_match{
+  'Automount',
+  'BusName',
+  'Install',
+  'Mount',
+  'Path',
+  'Service',
+  'Service',
+  'Socket',
+  'Timer',
+  'Unit'
+}
+local string = token(l.STRING, sq_str + dq_str + '[' * section_word * ']')
+
+-- 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({
+  -- values
+  'true',
+  'false',
+  'on',
+  'off',
+  'yes',
+  'no',
+
+  -- special system units
+  'basic.target',
+  'ctrl-alt-del.target',
+  'cryptsetup.target',
+  'dbus.service',
+  'dbus.socket',
+  'default.target',
+  'display-manager.service',
+  'emergency.target',
+  'exit.target',
+  'final.target',
+  'getty.target',
+  'graphical.target',
+  'hibernate.target',
+  'hybrid-sleep.target',
+  'halt.target',
+  'initrd-fs.target',
+  'kbrequest.target',
+  'kexec.target',
+  'local-fs.target',
+  'multi-user.target',
+  'network-online.target',
+  'paths.target',
+  'poweroff.target',
+  'reboot.target',
+  'remote-fs.target',
+  'rescue.target',
+  'initrd-root-fs.target',
+  'runlevel2.target',
+  'runlevel3.target',
+  'runlevel4.target',
+  'runlevel5.target',
+  'shutdown.target',
+  'sigpwr.target',
+  'sleep.target',
+  'slices.target',
+  'sockets.target',
+  'suspend.target',
+  'swap.target',
+  'sysinit.target',
+  'syslog.socket',
+  'system-update.target',
+  'timers.target',
+  'umount.target',
+
+  -- special system units for devices
+  'bluetooth.target',
+  'printer.target',
+  'smartcard.target',
+  'sound.target',
+
+  -- special passive system units
+  'cryptsetup-pre.target',
+  'local-fs-pre.target',
+  'network.target',
+  'network-pre.target',
+  'nss-lookup.target',
+  'nss-user-lookup.target',
+  'remote-fs-pre.target',
+  'rpcbind.target',
+  'time-sync.target',
+
+  -- specail slice units
+  '-.slice',
+  'system.slice',
+  'user.slice',
+  'machine.slice',
+
+  -- environment variables
+  'PATH',
+  'LANG',
+  'USER',
+  'LOGNAME',
+  'HOME',
+  'SHELL',
+  'XDG_RUNTIME_DIR',
+  'XDG_SESSION_ID',
+  'XDG_SEAT',
+  'XDG_VTNR',
+  'MAINPID',
+  'MANAGERPID',
+  'LISTEN_FDS',
+  'LISTEN_PID',
+  'LISTEN_FDNAMES',
+  'NOTIFY_SOCKET',
+  'WATCHDOG_PID',
+  'WATCHDOG_USEC',
+  'TERM'
+}, '.-'))
+
+-- Options.
+local option_word = word_match{
+  -- unit section options
+  'Description',
+  'Documentation',
+  'Requires',
+  'Requisite',
+  'Wants',
+  'BindsTo',
+  'PartOf',
+  'Conflicts',
+  'Before',
+  'After',
+  'OnFailure',
+  'PropagatesReloadTo',
+  'ReloadPropagatedFrom',
+  'JoinsNamespaceOf',
+  'RequiresMountsFor',
+  'OnFailureJobMode',
+  'IgnoreOnIsolate',
+  'StopWhenUnneeded',
+  'RefuseManualStart',
+  'RefuseManualStop',
+  'AllowIsolate',
+  'DefaultDependencies',
+  'JobTimeoutSec',
+  'JobTimeoutAction',
+  'JobTimeoutRebootArgument',
+  'StartLimitInterval',
+  'StartLimitBurst',
+  'StartLimitAction',
+  'RebootArgument',
+  'ConditionArchitecture',
+  'ConditionVirtualization',
+  'ConditionHost',
+  'ConditionKernelCommandLine',
+  'ConditionSecurity',
+  'ConditionCapability',
+  'ConditionACPower',
+  'ConditionNeedsUpdate',
+  'ConditionFirstBoot',
+  'ConditionPathExists',
+  'ConditionPathExistsGlob',
+  'ConditionPathIsDirectory',
+  'ConditionPathIsSymbolicLink',
+  'ConditionPathIsMountPoint',
+  'ConditionPathIsReadWrite',
+  'ConditionDirectoryNotEmpty',
+  'ConditionFileNotEmpty',
+  'ConditionFileIsExecutable',
+  'AssertArchitecture',
+  'AssertVirtualization',
+  'AssertHost',
+  'AssertKernelCommandLine',
+  'AssertSecurity',
+  'AssertCapability',
+  'AssertACPower',
+  'AssertNeedsUpdate',
+  'AssertFirstBoot',
+  'AssertPathExists',
+  'AssertPathExistsGlob',
+  'AssertPathIsDirectory',
+  'AssertPathIsSymbolicLink',
+  'AssertPathIsMountPoint',
+  'AssertPathIsReadWrite',
+  'AssertDirectoryNotEmpty',
+  'AssertFileNotEmpty',
+  'AssertFileIsExecutable',
+  'SourcePath',
+
+  -- install section options
+  'Alias',
+  'WantedBy',
+  'RequiredBy',
+  'Also',
+  'DefaultInstance',
+
+  -- service section options
+  'Type',
+  'RemainAfterExit',
+  'GuessMainPID',
+  'PIDFile',
+  'BusName',
+  'BusPolicy',
+  'ExecStart',
+  'ExecStartPre',
+  'ExecStartPost',
+  'ExecReload',
+  'ExecStop',
+  'ExecStopPost',
+  'RestartSec',
+  'TimeoutStartSec',
+  'TimeoutStopSec',
+  'TimeoutSec',
+  'RuntimeMaxSec',
+  'WatchdogSec',
+  'Restart',
+  'SuccessExitStatus',
+  'RestartPreventExitStatus',
+  'RestartForceExitStatus',
+  'PermissionsStartOnly',
+  'RootDirectoryStartOnly',
+  'NonBlocking',
+  'NotifyAccess',
+  'Sockets',
+  'FailureAction',
+  'FileDescriptorStoreMax',
+  'USBFunctionDescriptors',
+  'USBFunctionStrings',
+
+  -- socket section options
+  'ListenStream',
+  'ListenDatagram',
+  'ListenSequentialPacket',
+  'ListenFIFO',
+  'ListenSpecial',
+  'ListenNetlink',
+  'ListenMessageQueue',
+  'ListenUSBFunction',
+  'SocketProtocol',
+  'BindIPv6Only',
+  'Backlog',
+  'BindToDevice',
+  'SocketUser',
+  'SocketGroup',
+  'SocketMode',
+  'DirectoryMode',
+  'Accept',
+  'Writable',
+  'MaxConnections',
+  'KeepAlive',
+  'KeepAliveTimeSec',
+  'KeepAliveIntervalSec',
+  'KeepAliveProbes',
+  'NoDelay',
+  'Priority',
+  'DeferAcceptSec',
+  'ReceiveBuffer',
+  'SendBuffer',
+  'IPTOS',
+  'IPTTL',
+  'Mark',
+  'ReusePort',
+  'SmackLabel',
+  'SmackLabelIPIn',
+  'SmackLabelIPOut',
+  'SELinuxContextFromNet',
+  'PipeSize',
+  'MessageQueueMaxMessages',
+  'MessageQueueMessageSize',
+  'FreeBind',
+  'Transparent',
+  'Broadcast',
+  'PassCredentials',
+  'PassSecurity',
+  'TCPCongestion',
+  'ExecStartPre',
+  'ExecStartPost',
+  'ExecStopPre',
+  'ExecStopPost',
+  'TimeoutSec',
+  'Service',
+  'RemoveOnStop',
+  'Symlinks',
+  'FileDescriptorName',
+
+  -- mount section options
+  'What',
+  'Where',
+  'Type',
+  'Options',
+  'SloppyOptions',
+  'DirectoryMode',
+  'TimeoutSec',
+
+  -- path section options
+  'PathExists',
+  'PathExistsGlob',
+  'PathChanged',
+  'PathModified',
+  'DirectoryNotEmpty',
+  'Unit',
+  'MakeDirectory',
+  'DirectoryMode',
+
+  -- timer section options
+  'OnActiveSec',
+  'OnBootSec',
+  'OnStartupSec',
+  'OnUnitActiveSec',
+  'OnUnitInactiveSec',
+  'OnCalendar',
+  'AccuracySec',
+  'RandomizedDelaySec',
+  'Unit',
+  'Persistent',
+  'WakeSystem',
+  'RemainAfterElapse',
+
+  -- exec section options
+  'WorkingDirectory',
+  'RootDirectory',
+  'User',
+  'Group',
+  'SupplementaryGroups',
+  'Nice',
+  'OOMScoreAdjust',
+  'IOSchedulingClass',
+  'IOSchedulingPriority',
+  'CPUSchedulingPolicy',
+  'CPUSchedulingPriority',
+  'CPUSchedulingResetOnFork',
+  'CPUAffinity',
+  'UMask',
+  'Environment',
+  'EnvironmentFile',
+  'PassEnvironment',
+  'StandardInput',
+  'StandardOutput',
+  'StandardError',
+  'TTYPath',
+  'TTYReset',
+  'TTYVHangup',
+  'TTYVTDisallocate',
+  'SyslogIdentifier',
+  'SyslogFacility',
+  'SyslogLevel',
+  'SyslogLevelPrefix',
+  'TimerSlackNSec',
+  'LimitCPU',
+  'LimitFSIZE',
+  'LimitDATA',
+  'LimitSTACK',
+  'LimitCORE',
+  'LimitRSS',
+  'LimitNOFILE',
+  'LimitAS',
+  'LimitNPROC',
+  'LimitMEMLOCK',
+  'LimitLOCKS',
+  'LimitSIGPENDING',
+  'LimitMSGQUEUE',
+  'LimitNICE',
+  'LimitRTPRIO',
+  'LimitRTTIME',
+  'PAMName',
+  'CapabilityBoundingSet',
+  'AmbientCapabilities',
+  'SecureBits',
+  'Capabilities',
+  'ReadWriteDirectories',
+  'ReadOnlyDirectories',
+  'InaccessibleDirectories',
+  'PrivateTmp',
+  'PrivateDevices',
+  'PrivateNetwork',
+  'ProtectSystem',
+  'ProtectHome',
+  'MountFlags',
+  'UtmpIdentifier',
+  'UtmpMode',
+  'SELinuxContext',
+  'AppArmorProfile',
+  'SmackProcessLabel',
+  'IgnoreSIGPIPE',
+  'NoNewPrivileges',
+  'SystemCallFilter',
+  'SystemCallErrorNumber',
+  'SystemCallArchitectures',
+  'RestrictAddressFamilies',
+  'Personality',
+  'RuntimeDirectory',
+  'RuntimeDirectoryMode'
+}
+local preproc = token(l.PREPROCESSOR, option_word)
+
+-- Identifiers.
+local word = (l.alpha + '_') * (l.alnum + S('_.'))^0
+local identifier = token(l.IDENTIFIER, word)
+
+-- Operators.
+local operator = token(l.OPERATOR, '=')
+
+M._rules = {
+  {'whitespace', ws},
+  {'keyword', keyword},
+  {'string', string},
+  {'preproc', preproc},
+  {'identifier', identifier},
+  {'comment', comment},
+  {'number', number},
+  {'operator', operator},
+}
+
+M._LEXBYLINE = true
+
+return M