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.TH DWM 1 dwm\-VERSION
.SH NAME
dwm \- dynamic window manager
.SH SYNOPSIS
.B dwm
.RB [ \-v ]
.SH DESCRIPTION
dwm is a dynamic window manager for X. It manages windows in tiled, monocle
and floating layouts. Either layout can be applied dynamically, optimising the
environment for the application in use and the task performed.
.P
In tiled layouts windows are managed in a master and stacking area. The master
area contains the window which currently needs most attention, whereas the
stacking area contains all other windows. In monocle layout all windows are
maximised to the screen size. In floating layout windows can be resized and
moved freely. Dialog windows are always managed floating, regardless of the
layout applied.
.P
Windows are grouped by tags. Each window can be tagged with one or multiple
tags. Selecting certain tags displays all windows with these tags.
.P
dwm contains a small status bar which displays all available tags, the layout,
the title of the focused window, and the text read from standard input. A
floating window is indicated with an empty square and a maximised
floating window is indicated with a filled square before the windows
title.  The selected tags are indicated with a different color. The tags of
the focused window are indicated with a filled square in the top left
corner.  The tags which are applied to one or more windows are indicated
with an empty square in the top left corner.
.P
dwm draws a small border around windows to indicate the focus state.
.SH OPTIONS
.TP
.B \-v
prints version information to standard output, then exits.
.SH USAGE
.SS Status bar
.TP
.B Standard input
is read and displayed in the status text area.
.TP
.B Button1
click on a tag label to display all windows with that tag, click on the layout
label toggles between tiled and floating layout.
.TP
.B Button3
click on a tag label adds/removes all windows with that tag to/from the view.
.TP
.B Mod1\-Button1
click on a tag label applies that tag to the focused window.
.TP
.B Mod1\-Button3
click on a tag label adds/removes that tag to/from the focused window.
.SS Keyboard commands
.TP
.B Mod1\-Shift\-Return
Start
.BR xterm.
.TP
.B Mod1\-space
Toggles between layouts.
.TP
.B Mod1\-Control\-space
Toggles between geometries.
.TP
.B Mod1\-j
Focus next window.
.TP
.B Mod1\-k
Focus previous window.
.TP
.B Mod1\-h
Decrease master area size.
.TP
.B Mod1\-l
Increase master area size.
.TP
.B Mod1\-Return
Zooms/cycles focused window to/from master area (tiled layouts only).
.TP
.B Mod1\-Shift\-c
Close focused window.
.TP
.B Mod1\-Shift\-space
Toggle focused window between tiled and floating state.
.TP
.B Mod1\-Tab
Toggles to the previously selected tags.
.TP
.B Mod1\-r
Re-applies tagging rules to all windows.
.TP
.B Mod1\-Shift\-[1..n]
Apply
.RB nth
tag to focused window.
.TP
.B Mod1\-Shift\-0
Apply all tags to focused window.
.TP
.B Mod1\-Control\-Shift\-[1..n]
Add/remove
.B nth
tag to/from focused window.
.TP
.B Mod1\-[1..n]
View all windows with
.BR nth
tag.
.TP
.B Mod1\-0
View all windows with any tag.
.TP
.B Mod1\-Control\-[1..n]
Add/remove all windows with
.BR nth
tag to/from the view.
.TP
.B Mod1\-Shift\-q
Quit dwm.
.SS Mouse commands
.TP
.B Mod1\-Button1
Move focused window while dragging. Tiled windows will be toggled to the floating state.
.TP
.B Mod1\-Button2
Zooms/cycles focused window to/from master area. If it is floating (but not fixed) it will be toggled to the tiled state instead.
.TP
.B Mod1\-Button3
Resize focused window while dragging. Tiled windows will be toggled to the floating state.
.SH CUSTOMIZATION
dwm is customized by creating a custom config.h and (re)compiling the source
code. This keeps it fast, secure and simple.
.SH SEE ALSO
.BR dmenu (1)
.SH BUGS
The status bar may display
.BR "EOF"
when dwm has been started by an X session manager like
.BR xdm (1),
because those close standard output before executing dwm.
.P
Java applications which use the XToolkit/XAWT backend may draw grey windows
only. The XToolkit/XAWT backend breaks ICCCM-compliance in recent JDK 1.5 and early
JDK 1.6 versions, because it assumes a reparenting window manager. As a workaround
you can use JDK 1.4 (which doesn't contain the XToolkit/XAWT backend) or you
can set the following environment variable (to use the older Motif
backend instead):
.BR AWT_TOOLKIT=MToolkit .
.P
GTK 2.10.9+ versions contain a broken
.BR Save\-As
file dialog implementation,
which requests to reconfigure its window size in an endless loop. However, its
window is still respondable during this state, so you can simply ignore the flicker
until a new GTK version appears, which will fix this bug, approximately
GTK 2.10.12+ versions.
a id='n565' href='#n565'>565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806
#
#
#           The Nim Compiler
#        (c) Copyright 2015 Andreas Rumpf
#
#    See the file "copying.txt", included in this
#    distribution, for details about the copyright.
#

# This module handles the parsing of command line arguments.


# We do this here before the 'import' statement so 'defined' does not get
# confused with 'TGCMode.gcGenerational' etc.
template bootSwitch(name, expr, userString) =
  # Helper to build boot constants, for debugging you can 'echo' the else part.
  const name = if expr: " " & userString else: ""

bootSwitch(usedRelease, defined(release), "-d:release")
bootSwitch(usedGnuReadline, defined(useLinenoise), "-d:useLinenoise")
bootSwitch(usedBoehm, defined(boehmgc), "--gc:boehm")
bootSwitch(usedMarkAndSweep, defined(gcmarkandsweep), "--gc:markAndSweep")
bootSwitch(usedGenerational, defined(gcgenerational), "--gc:generational")
bootSwitch(usedGoGC, defined(gogc), "--gc:go")
bootSwitch(usedNoGC, defined(nogc), "--gc:none")

import
  os, msgs, options, nversion, condsyms, strutils, extccomp, platform,
  wordrecg, parseutils, nimblecmd, idents, parseopt, sequtils, lineinfos,
  pathutils

# but some have deps to imported modules. Yay.
bootSwitch(usedTinyC, hasTinyCBackend, "-d:tinyc")
bootSwitch(usedNativeStacktrace,
  defined(nativeStackTrace) and nativeStackTraceSupported,
  "-d:nativeStackTrace")
bootSwitch(usedFFI, hasFFI, "-d:nimHasLibFFI")

type
  TCmdLinePass* = enum
    passCmd1,                 # first pass over the command line
    passCmd2,                 # second pass over the command line
    passPP                    # preprocessor called processCommand()

const
  HelpMessage = "Nim Compiler Version $1 [$2: $3]\n" &
      "Compiled at $4\n" &
      "Copyright (c) 2006-" & copyrightYear & " by Andreas Rumpf\n"

const
  Usage = slurp"../doc/basicopt.txt".replace("//", "")
  FeatureDesc = block:
    var x = ""
    for f in low(Feature)..high(Feature):
      if x.len > 0: x.add "|"
      x.add $f
    x
  AdvancedUsage = slurp"../doc/advopt.txt".replace("//", "") % FeatureDesc

proc getCommandLineDesc(conf: ConfigRef): string =
  result = (HelpMessage % [VersionAsString, platform.OS[conf.target.hostOS].name,
                           CPU[conf.target.hostCPU].name, CompileDate]) &
                           Usage

proc helpOnError(conf: ConfigRef; pass: TCmdLinePass) =
  if pass == passCmd1:
    msgWriteln(conf, getCommandLineDesc(conf), {msgStdout})
    msgQuit(0)

proc writeAdvancedUsage(conf: ConfigRef; pass: TCmdLinePass) =
  if pass == passCmd1:
    msgWriteln(conf, (HelpMessage % [VersionAsString,
                                 platform.OS[conf.target.hostOS].name,
                                 CPU[conf.target.hostCPU].name, CompileDate]) &
                                 AdvancedUsage,
               {msgStdout})
    msgQuit(0)

proc writeFullhelp(conf: ConfigRef; pass: TCmdLinePass) =
  if pass == passCmd1:
    msgWriteln(conf, `%`(HelpMessage, [VersionAsString,
                                 platform.OS[conf.target.hostOS].name,
                                 CPU[conf.target.hostCPU].name, CompileDate]) &
                                 Usage & AdvancedUsage,
               {msgStdout})
    msgQuit(0)

proc writeVersionInfo(conf: ConfigRef; pass: TCmdLinePass) =
  if pass == passCmd1:
    msgWriteln(conf, `%`(HelpMessage, [VersionAsString,
                                 platform.OS[conf.target.hostOS].name,
                                 CPU[conf.target.hostCPU].name, CompileDate]),
               {msgStdout})

    const gitHash = gorge("git log -n 1 --format=%H").strip
    when gitHash.len == 40:
      msgWriteln(conf, "git hash: " & gitHash, {msgStdout})

    msgWriteln(conf, "active boot switches:" & usedRelease &
      usedTinyC & usedGnuReadline & usedNativeStacktrace &
      usedFFI & usedBoehm & usedMarkAndSweep & usedGenerational & usedGoGC & usedNoGC,
               {msgStdout})
    msgQuit(0)

proc writeCommandLineUsage*(conf: ConfigRef) =
  msgWriteln(conf, getCommandLineDesc(conf), {msgStdout})

proc addPrefix(switch: string): string =
  if len(switch) == 1: result = "-" & switch
  else: result = "--" & switch

const
  errInvalidCmdLineOption = "invalid command line option: '$1'"
  errOnOrOffExpectedButXFound = "'on' or 'off' expected, but '$1' found"
  errOnOffOrListExpectedButXFound = "'on', 'off' or 'list' expected, but '$1' found"
  errOffHintsError = "'off', 'hint' or 'error' expected, but '$1' found"

proc invalidCmdLineOption(conf: ConfigRef; pass: TCmdLinePass, switch: string, info: TLineInfo) =
  if switch == " ": localError(conf, info, errInvalidCmdLineOption % "-")
  else: localError(conf, info, errInvalidCmdLineOption % addPrefix(switch))

proc splitSwitch(conf: ConfigRef; switch: string, cmd, arg: var string, pass: TCmdLinePass,
                 info: TLineInfo) =
  cmd = ""
  var i = 0
  if i < len(switch) and switch[i] == '-': inc(i)
  if i < len(switch) and switch[i] == '-': inc(i)
  while i < len(switch):
    case switch[i]
    of 'a'..'z', 'A'..'Z', '0'..'9', '_', '.': add(cmd, switch[i])
    else: break
    inc(i)
  if i >= len(switch): arg = ""
  # cmd:arg => (cmd,arg)
  elif switch[i] in {':', '='}: arg = substr(switch, i + 1)
  # cmd[sub]:rest => (cmd,[sub]:rest)
  elif switch[i] == '[': arg = substr(switch, i)
  else: invalidCmdLineOption(conf, pass, switch, info)

proc processOnOffSwitch(conf: ConfigRef; op: TOptions, arg: string, pass: TCmdLinePass,
                        info: TLineInfo) =
  case arg.normalize
  of "","on": conf.options = conf.options + op
  of "off": conf.options = conf.options - op
  else: localError(conf, info, errOnOrOffExpectedButXFound % arg)

proc processOnOffSwitchOrList(conf: ConfigRef; op: TOptions, arg: string, pass: TCmdLinePass,
                              info: TLineInfo): bool =
  result = false
  case arg.normalize
  of "on": conf.options = conf.options + op
  of "off": conf.options = conf.options - op
  of "list": result = true
  else: localError(conf, info, errOnOffOrListExpectedButXFound % arg)

proc processOnOffSwitchG(conf: ConfigRef; op: TGlobalOptions, arg: string, pass: TCmdLinePass,
                         info: TLineInfo) =
  case arg.normalize
  of "", "on": conf.globalOptions = conf.globalOptions + op
  of "off": conf.globalOptions = conf.globalOptions - op
  else: localError(conf, info, errOnOrOffExpectedButXFound % arg)

proc expectArg(conf: ConfigRef; switch, arg: string, pass: TCmdLinePass, info: TLineInfo) =
  if arg == "":
    localError(conf, info, "argument for command line option expected: '$1'" % addPrefix(switch))

proc expectNoArg(conf: ConfigRef; switch, arg: string, pass: TCmdLinePass, info: TLineInfo) =
  if arg != "":
    localError(conf, info, "invalid argument for command line option: '$1'" % addPrefix(switch))

proc processSpecificNote*(arg: string, state: TSpecialWord, pass: TCmdLinePass,
                         info: TLineInfo; orig: string; conf: ConfigRef) =
  var id = ""  # arg = key:val or [key]:val;  with val=on|off
  var i = 0
  var n = hintMin
  var isBracket = false
  if i < len(arg) and arg[i] == '[':
    isBracket = true
    inc(i)
  while i < len(arg) and (arg[i] notin {':', '=', ']'}):
    add(id, arg[i])
    inc(i)
  if isBracket:
    if i < len(arg) and arg[i] == ']': inc(i)
    else: invalidCmdLineOption(conf, pass, orig, info)

  if i < len(arg) and (arg[i] in {':', '='}): inc(i)
  else: invalidCmdLineOption(conf, pass, orig, info)
  if state == wHint:
    let x = findStr(lineinfos.HintsToStr, id)
    if x >= 0: n = TNoteKind(x + ord(hintMin))
    else: localError(conf, info, "unknown hint: " & id)
  else:
    let x = findStr(lineinfos.WarningsToStr, id)
    if x >= 0: n = TNoteKind(x + ord(warnMin))
    else: localError(conf, info, "unknown warning: " & id)
  case substr(arg, i).normalize
  of "on":
    incl(conf.notes, n)
    incl(conf.mainPackageNotes, n)
    incl(conf.enableNotes, n)
  of "off":
    excl(conf.notes, n)
    excl(conf.mainPackageNotes, n)
    incl(conf.disableNotes, n)
    excl(conf.foreignPackageNotes, n)
  else: localError(conf, info, errOnOrOffExpectedButXFound % arg)

proc processCompile(conf: ConfigRef; filename: string) =
  var found = findFile(conf, filename)
  if found.isEmpty: found = AbsoluteFile filename
  extccomp.addExternalFileToCompile(conf, found)

const
  errNoneBoehmRefcExpectedButXFound = "'none', 'boehm' or 'refc' expected, but '$1' found"
  errNoneSpeedOrSizeExpectedButXFound = "'none', 'speed' or 'size' expected, but '$1' found"
  errGuiConsoleOrLibExpectedButXFound = "'gui', 'console' or 'lib' expected, but '$1' found"

proc testCompileOptionArg*(conf: ConfigRef; switch, arg: string, info: TLineInfo): bool =
  case switch.normalize
  of "gc":
    case arg.normalize
    of "boehm":        result = conf.selectedGC == gcBoehm
    of "refc":         result = conf.selectedGC == gcRefc
    of "v2":           result = false
    of "markandsweep": result = conf.selectedGC == gcMarkAndSweep
    of "generational": result = false
    of "destructors":  result = conf.selectedGC == gcDestructors
    of "go":           result = conf.selectedGC == gcGo
    of "none":         result = conf.selectedGC == gcNone
    of "stack", "regions": result = conf.selectedGC == gcRegions
    else: localError(conf, info, errNoneBoehmRefcExpectedButXFound % arg)
  of "opt":
    case arg.normalize
    of "speed": result = contains(conf.options, optOptimizeSpeed)
    of "size": result = contains(conf.options, optOptimizeSize)
    of "none": result = conf.options * {optOptimizeSpeed, optOptimizeSize} == {}
    else: localError(conf, info, errNoneSpeedOrSizeExpectedButXFound % arg)
  of "verbosity": result = $conf.verbosity == arg
  of "app":
    case arg.normalize
    of "gui":       result = contains(conf.globalOptions, optGenGuiApp)
    of "console":   result = not contains(conf.globalOptions, optGenGuiApp)
    of "lib":       result = contains(conf.globalOptions, optGenDynLib) and
                      not contains(conf.globalOptions, optGenGuiApp)
    of "staticlib": result = contains(conf.globalOptions, optGenStaticLib) and
                      not contains(conf.globalOptions, optGenGuiApp)
    else: localError(conf, info, errGuiConsoleOrLibExpectedButXFound % arg)
  of "dynliboverride":
    result = isDynlibOverride(conf, arg)
  else: invalidCmdLineOption(conf, passCmd1, switch, info)

proc testCompileOption*(conf: ConfigRef; switch: string, info: TLineInfo): bool =
  case switch.normalize
  of "debuginfo": result = contains(conf.globalOptions, optCDebug)
  of "compileonly", "c": result = contains(conf.globalOptions, optCompileOnly)
  of "nolinking": result = contains(conf.globalOptions, optNoLinking)
  of "nomain": result = contains(conf.globalOptions, optNoMain)
  of "forcebuild", "f": result = contains(conf.globalOptions, optForceFullMake)
  of "warnings", "w": result = contains(conf.options, optWarns)
  of "hints": result = contains(conf.options, optHints)
  of "threadanalysis": result = contains(conf.globalOptions, optThreadAnalysis)
  of "stacktrace": result = contains(conf.options, optStackTrace)
  of "linetrace": result = contains(conf.options, optLineTrace)
  of "debugger": result = contains(conf.options, optEndb)
  of "profiler": result = contains(conf.options, optProfiler)
  of "memtracker": result = contains(conf.options, optMemTracker)
  of "checks", "x": result = conf.options * ChecksOptions == ChecksOptions
  of "floatchecks":
    result = conf.options * {optNaNCheck, optInfCheck} == {optNaNCheck, optInfCheck}
  of "infchecks": result = contains(conf.options, optInfCheck)
  of "nanchecks": result = contains(conf.options, optNaNCheck)
  of "nilchecks": result = contains(conf.options, optNilCheck)
  of "objchecks": result = contains(conf.options, optObjCheck)
  of "fieldchecks": result = contains(conf.options, optFieldCheck)
  of "rangechecks": result = contains(conf.options, optRangeCheck)
  of "boundchecks": result = contains(conf.options, optBoundsCheck)
  of "overflowchecks": result = contains(conf.options, optOverflowCheck)
  of "movechecks": result = contains(conf.options, optMoveCheck)
  of "linedir": result = contains(conf.options, optLineDir)
  of "assertions", "a": result = contains(conf.options, optAssert)
  of "run", "r": result = contains(conf.globalOptions, optRun)
  of "symbolfiles": result = conf.symbolFiles != disabledSf
  of "genscript": result = contains(conf.globalOptions, optGenScript)
  of "threads": result = contains(conf.globalOptions, optThreads)
  of "taintmode": result = contains(conf.globalOptions, optTaintMode)
  of "tlsemulation": result = contains(conf.globalOptions, optTlsEmulation)
  of "implicitstatic": result = contains(conf.options, optImplicitStatic)
  of "patterns": result = contains(conf.options, optPatterns)
  of "excessivestacktrace": result = contains(conf.globalOptions, optExcessiveStackTrace)
  of "nilseqs": result = contains(conf.options, optNilSeqs)
  of "oldast": result = contains(conf.options, optOldAst)
  else: invalidCmdLineOption(conf, passCmd1, switch, info)

proc processPath(conf: ConfigRef; path: string, info: TLineInfo,
                 notRelativeToProj = false): AbsoluteDir =
  let p = if os.isAbsolute(path) or '$' in path:
            path
          elif notRelativeToProj:
            getCurrentDir() / path
          else:
            conf.projectPath.string / path
  try:
    result = AbsoluteDir pathSubs(conf, p, toFullPath(conf, info).splitFile().dir)
  except ValueError:
    localError(conf, info, "invalid path: " & p)
    result = AbsoluteDir p

proc processCfgPath(conf: ConfigRef; path: string, info: TLineInfo): AbsoluteDir =
  let path = if path.len > 0 and path[0] == '"': strutils.unescape(path)
             else: path
  let basedir = toFullPath(conf, info).splitFile().dir
  let p = if os.isAbsolute(path) or '$' in path:
            path
          else:
            basedir / path
  try:
    result = AbsoluteDir pathSubs(conf, p, basedir)
  except ValueError:
    localError(conf, info, "invalid path: " & p)
    result = AbsoluteDir p

const
  errInvalidNumber = "$1 is not a valid number"

proc trackDirty(conf: ConfigRef; arg: string, info: TLineInfo) =
  var a = arg.split(',')
  if a.len != 4: localError(conf, info,
                            "DIRTY_BUFFER,ORIGINAL_FILE,LINE,COLUMN expected")
  var line, column: int
  if parseUtils.parseInt(a[2], line) <= 0:
    localError(conf, info, errInvalidNumber % a[1])
  if parseUtils.parseInt(a[3], column) <= 0:
    localError(conf, info, errInvalidNumber % a[2])

  let dirtyOriginalIdx = fileInfoIdx(conf, AbsoluteFile a[1])
  if dirtyOriginalIdx.int32 >= 0:
    msgs.setDirtyFile(conf, dirtyOriginalIdx, AbsoluteFile a[0])

  conf.m.trackPos = newLineInfo(dirtyOriginalIdx, line, column)

proc track(conf: ConfigRef; arg: string, info: TLineInfo) =
  var a = arg.split(',')
  if a.len != 3: localError(conf, info, "FILE,LINE,COLUMN expected")
  var line, column: int
  if parseUtils.parseInt(a[1], line) <= 0:
    localError(conf, info, errInvalidNumber % a[1])
  if parseUtils.parseInt(a[2], column) <= 0:
    localError(conf, info, errInvalidNumber % a[2])
  conf.m.trackPos = newLineInfo(conf, AbsoluteFile a[0], line, column)

proc dynlibOverride(conf: ConfigRef; switch, arg: string, pass: TCmdLinePass, info: TLineInfo) =
  if pass in {passCmd2, passPP}:
    expectArg(conf, switch, arg, pass, info)
    options.inclDynlibOverride(conf, arg)

proc processSwitch*(switch, arg: string, pass: TCmdLinePass, info: TLineInfo;
                    conf: ConfigRef) =
  var
    key, val: string
  case switch.normalize
  of "path", "p":
    expectArg(conf, switch, arg, pass, info)
    addPath(conf, if pass == passPP: processCfgPath(conf, arg, info)
                  else: processPath(conf, arg, info), info)
  of "nimblepath", "babelpath":
    # keep the old name for compat
    if pass in {passCmd2, passPP} and optNoNimblePath notin conf.globalOptions:
      expectArg(conf, switch, arg, pass, info)
      var path = processPath(conf, arg, info, notRelativeToProj=true)
      let nimbleDir = AbsoluteDir getEnv("NIMBLE_DIR")
      if not nimbleDir.isEmpty and pass == passPP:
        path = nimbleDir / RelativeDir"pkgs"
      nimblePath(conf, path, info)
  of "nonimblepath", "nobabelpath":
    expectNoArg(conf, switch, arg, pass, info)
    disableNimblePath(conf)
  of "excludepath":
    expectArg(conf, switch, arg, pass, info)
    let path = processPath(conf, arg, info)
    conf.searchPaths.keepItIf(it != path)
    conf.lazyPaths.keepItIf(it != path)
  of "nimcache":
    expectArg(conf, switch, arg, pass, info)
    conf.nimcacheDir = processPath(conf, arg, info, true)
  of "out", "o":
    expectArg(conf, switch, arg, pass, info)
    let f = splitFile(arg.expandTilde)
    conf.outFile = RelativeFile f.name & f.ext
    conf.outDir = toAbsoluteDir f.dir
  of "outdir":
    expectArg(conf, switch, arg, pass, info)
    conf.outDir = toAbsoluteDir arg.expandTilde
  of "docseesrcurl":
    expectArg(conf, switch, arg, pass, info)
    conf.docSeeSrcUrl = arg
  of "mainmodule", "m":
    discard "allow for backwards compatibility, but don't do anything"
  of "define", "d":
    expectArg(conf, switch, arg, pass, info)
    if {':', '='} in arg:
      splitSwitch(conf, arg, key, val, pass, info)
      defineSymbol(conf.symbols, key, val)
    else:
      defineSymbol(conf.symbols, arg)
  of "undef", "u":
    expectArg(conf, switch, arg, pass, info)
    undefSymbol(conf.symbols, arg)
  of "symbol":
    expectArg(conf, switch, arg, pass, info)
    # deprecated, do nothing
  of "compile":
    expectArg(conf, switch, arg, pass, info)
    if pass in {passCmd2, passPP}: processCompile(conf, arg)
  of "link":
    expectArg(conf, switch, arg, pass, info)
    if pass in {passCmd2, passPP}:
      addExternalFileToLink(conf, AbsoluteFile arg)
  of "debuginfo":
    processOnOffSwitchG(conf, {optCDebug}, arg, pass, info)
  of "embedsrc":
    processOnOffSwitchG(conf, {optEmbedOrigSrc}, arg, pass, info)
  of "compileonly", "c":
    processOnOffSwitchG(conf, {optCompileOnly}, arg, pass, info)
  of "nolinking":
    processOnOffSwitchG(conf, {optNoLinking}, arg, pass, info)
  of "nomain":
    processOnOffSwitchG(conf, {optNoMain}, arg, pass, info)
  of "forcebuild", "f":
    processOnOffSwitchG(conf, {optForceFullMake}, arg, pass, info)
  of "project":
    processOnOffSwitchG(conf, {optWholeProject}, arg, pass, info)
  of "gc":
    expectArg(conf, switch, arg, pass, info)
    case arg.normalize
    of "boehm":
      conf.selectedGC = gcBoehm
      defineSymbol(conf.symbols, "boehmgc")
    of "refc":
      conf.selectedGC = gcRefc
    of "v2":
      message(conf, info, warnDeprecated, "--gc:v2 is deprecated; using default gc")
    of "markandsweep":
      conf.selectedGC = gcMarkAndSweep
      defineSymbol(conf.symbols, "gcmarkandsweep")
    of "destructors":
      conf.selectedGC = gcDestructors
      defineSymbol(conf.symbols, "gcdestructors")
    of "go":
      conf.selectedGC = gcGo
      defineSymbol(conf.symbols, "gogc")
    of "none":
      conf.selectedGC = gcNone
      defineSymbol(conf.symbols, "nogc")
    of "stack", "regions":
      conf.selectedGC= gcRegions
      defineSymbol(conf.symbols, "gcregions")
    else: localError(conf, info, errNoneBoehmRefcExpectedButXFound % arg)
  of "warnings", "w":
    if processOnOffSwitchOrList(conf, {optWarns}, arg, pass, info): listWarnings(conf)
  of "warning": processSpecificNote(arg, wWarning, pass, info, switch, conf)
  of "hint": processSpecificNote(arg, wHint, pass, info, switch, conf)
  of "hints":
    if processOnOffSwitchOrList(conf, {optHints}, arg, pass, info): listHints(conf)
  of "threadanalysis": processOnOffSwitchG(conf, {optThreadAnalysis}, arg, pass, info)
  of "stacktrace": processOnOffSwitch(conf, {optStackTrace}, arg, pass, info)
  of "excessivestacktrace": processOnOffSwitchG(conf, {optExcessiveStackTrace}, arg, pass, info)
  of "linetrace": processOnOffSwitch(conf, {optLineTrace}, arg, pass, info)
  of "debugger":
    case arg.normalize
    of "on", "endb":
      conf.options.incl optEndb
      defineSymbol(conf.symbols, "endb")
    of "off":
      conf.options.excl optEndb
      undefSymbol(conf.symbols, "endb")
    of "native", "gdb":
      incl(conf.globalOptions, optCDebug)
      conf.options = conf.options + {optLineDir} - {optEndb}
      #defineSymbol(conf.symbols, "nimTypeNames") # type names are used in gdb pretty printing
      undefSymbol(conf.symbols, "endb")
    else:
      localError(conf, info, "expected endb|gdb but found " & arg)
  of "profiler":
    processOnOffSwitch(conf, {optProfiler}, arg, pass, info)
    if optProfiler in conf.options: defineSymbol(conf.symbols, "profiler")
    else: undefSymbol(conf.symbols, "profiler")
  of "memtracker":
    processOnOffSwitch(conf, {optMemTracker}, arg, pass, info)
    if optMemTracker in conf.options: defineSymbol(conf.symbols, "memtracker")
    else: undefSymbol(conf.symbols, "memtracker")
  of "hotcodereloading":
    processOnOffSwitchG(conf, {optHotCodeReloading}, arg, pass, info)
    if conf.hcrOn:
      defineSymbol(conf.symbols, "hotcodereloading")
      defineSymbol(conf.symbols, "useNimRtl")
    else:
      undefSymbol(conf.symbols, "hotcodereloading")
      undefSymbol(conf.symbols, "useNimRtl")
  of "oldnewlines":
    case arg.normalize
    of "","on":
      conf.oldNewlines = true
      defineSymbol(conf.symbols, "nimOldNewlines")
    of "off":
      conf.oldNewlines = false
      undefSymbol(conf.symbols, "nimOldNewlines")
    else:
      localError(conf, info, errOnOrOffExpectedButXFound % arg)
  of "laxstrings": processOnOffSwitch(conf, {optLaxStrings}, arg, pass, info)
  of "nilseqs": processOnOffSwitch(conf, {optNilSeqs}, arg, pass, info)
  of "oldast": processOnOffSwitch(conf, {optOldAst}, arg, pass, info)
  of "checks", "x": processOnOffSwitch(conf, ChecksOptions, arg, pass, info)
  of "floatchecks":
    processOnOffSwitch(conf, {optNaNCheck, optInfCheck}, arg, pass, info)
  of "infchecks": processOnOffSwitch(conf, {optInfCheck}, arg, pass, info)
  of "nanchecks": processOnOffSwitch(conf, {optNaNCheck}, arg, pass, info)
  of "nilchecks": processOnOffSwitch(conf, {optNilCheck}, arg, pass, info)
  of "objchecks": processOnOffSwitch(conf, {optObjCheck}, arg, pass, info)
  of "fieldchecks": processOnOffSwitch(conf, {optFieldCheck}, arg, pass, info)
  of "rangechecks": processOnOffSwitch(conf, {optRangeCheck}, arg, pass, info)
  of "boundchecks": processOnOffSwitch(conf, {optBoundsCheck}, arg, pass, info)
  of "overflowchecks": processOnOffSwitch(conf, {optOverflowCheck}, arg, pass, info)
  of "movechecks": processOnOffSwitch(conf, {optMoveCheck}, arg, pass, info)
  of "linedir": processOnOffSwitch(conf, {optLineDir}, arg, pass, info)
  of "assertions", "a": processOnOffSwitch(conf, {optAssert}, arg, pass, info)
  of "deadcodeelim": discard # deprecated, dead code elim always on
  of "threads":
    processOnOffSwitchG(conf, {optThreads}, arg, pass, info)
    #if optThreads in conf.globalOptions: incl(conf.notes, warnGcUnsafe)
  of "tlsemulation": processOnOffSwitchG(conf, {optTlsEmulation}, arg, pass, info)
  of "taintmode": processOnOffSwitchG(conf, {optTaintMode}, arg, pass, info)
  of "implicitstatic":
    processOnOffSwitch(conf, {optImplicitStatic}, arg, pass, info)
  of "patterns":
    processOnOffSwitch(conf, {optPatterns}, arg, pass, info)
  of "opt":
    expectArg(conf, switch, arg, pass, info)
    case arg.normalize
    of "speed":
      incl(conf.options, optOptimizeSpeed)
      excl(conf.options, optOptimizeSize)
    of "size":
      excl(conf.options, optOptimizeSpeed)
      incl(conf.options, optOptimizeSize)
    of "none":
      excl(conf.options, optOptimizeSpeed)
      excl(conf.options, optOptimizeSize)
    else: localError(conf, info, errNoneSpeedOrSizeExpectedButXFound % arg)
  of "app":
    expectArg(conf, switch, arg, pass, info)
    case arg.normalize
    of "gui":
      incl(conf.globalOptions, optGenGuiApp)
      defineSymbol(conf.symbols, "executable")
      defineSymbol(conf.symbols, "guiapp")
    of "console":
      excl(conf.globalOptions, optGenGuiApp)
      defineSymbol(conf.symbols, "executable")
      defineSymbol(conf.symbols, "consoleapp")
    of "lib":
      incl(conf.globalOptions, optGenDynLib)
      excl(conf.globalOptions, optGenGuiApp)
      defineSymbol(conf.symbols, "library")
      defineSymbol(conf.symbols, "dll")
    of "staticlib":
      incl(conf.globalOptions, optGenStaticLib)
      excl(conf.globalOptions, optGenGuiApp)
      defineSymbol(conf.symbols, "library")
      defineSymbol(conf.symbols, "staticlib")
    else: localError(conf, info, errGuiConsoleOrLibExpectedButXFound % arg)
  of "passc", "t":
    expectArg(conf, switch, arg, pass, info)
    if pass in {passCmd2, passPP}: extccomp.addCompileOptionCmd(conf, arg)
  of "passl", "l":
    expectArg(conf, switch, arg, pass, info)
    if pass in {passCmd2, passPP}: extccomp.addLinkOptionCmd(conf, arg)
  of "cincludes":
    expectArg(conf, switch, arg, pass, info)
    if pass in {passCmd2, passPP}: conf.cIncludes.add processPath(conf, arg, info)
  of "clibdir":
    expectArg(conf, switch, arg, pass, info)
    if pass in {passCmd2, passPP}: conf.cLibs.add processPath(conf, arg, info)
  of "clib":
    expectArg(conf, switch, arg, pass, info)
    if pass in {passCmd2, passPP}:
      conf.cLinkedLibs.add processPath(conf, arg, info).string
  of "header":
    if conf != nil: conf.headerFile = arg
    incl(conf.globalOptions, optGenIndex)
  of "index":
    processOnOffSwitchG(conf, {optGenIndex}, arg, pass, info)
  of "import":
    expectArg(conf, switch, arg, pass, info)
    if pass in {passCmd2, passPP}:
      conf.implicitImports.add findModule(conf, arg, toFullPath(conf, info)).string
  of "include":
    expectArg(conf, switch, arg, pass, info)
    if pass in {passCmd2, passPP}:
      conf.implicitIncludes.add findModule(conf, arg, toFullPath(conf, info)).string
  of "listcmd":
    processOnOffSwitchG(conf, {optListCmd}, arg, pass, info)
  of "genmapping":
    processOnOffSwitchG(conf, {optGenMapping}, arg, pass, info)
  of "os":
    expectArg(conf, switch, arg, pass, info)
    if pass in {passCmd1, passPP}:
      let theOS = platform.nameToOS(arg)
      if theOS == osNone: localError(conf, info, "unknown OS: '$1'" % arg)
      elif theOS != conf.target.hostOS:
        setTarget(conf.target, theOS, conf.target.targetCPU)
  of "cpu":
    expectArg(conf, switch, arg, pass, info)
    if pass in {passCmd1, passPP}:
      let cpu = platform.nameToCPU(arg)
      if cpu == cpuNone: localError(conf, info, "unknown CPU: '$1'" % arg)
      elif cpu != conf.target.hostCPU:
        setTarget(conf.target, conf.target.targetOS, cpu)
  of "run", "r":
    processOnOffSwitchG(conf, {optRun}, arg, pass, info)
  of "errormax":
    expectArg(conf, switch, arg, pass, info)
    # Note: `nim check` (etc) can overwrite this.
    # `0` is meaningless, give it a useful meaning as in clang's -ferror-limit
    # If user doesn't set this flag and the code doesn't either, it'd
    # have the same effect as errorMax = 1
    let ret = parseInt(arg)
    conf.errorMax = if ret == 0: high(int) else: ret
  of "verbosity":
    expectArg(conf, switch, arg, pass, info)
    let verbosity = parseInt(arg)
    if verbosity notin {0..3}:
      localError(conf, info, "invalid verbosity level: '$1'" % arg)
    conf.verbosity = verbosity
    conf.notes = NotesVerbosity[conf.verbosity]
    incl(conf.notes, conf.enableNotes)
    excl(conf.notes, conf.disableNotes)
    conf.mainPackageNotes = conf.notes
  of "parallelbuild":
    expectArg(conf, switch, arg, pass, info)
    conf.numberOfProcessors = parseInt(arg)
  of "version", "v":
    expectNoArg(conf, switch, arg, pass, info)
    writeVersionInfo(conf, pass)
  of "advanced":
    expectNoArg(conf, switch, arg, pass, info)
    writeAdvancedUsage(conf, pass)
  of "fullhelp":
    expectNoArg(conf, switch, arg, pass, info)
    writeFullhelp(conf, pass)
  of "help", "h":
    expectNoArg(conf, switch, arg, pass, info)
    helpOnError(conf, pass)
  of "symbolfiles": discard "ignore for backwards compat"
  of "incremental":
    when not defined(nimIncremental):
      localError(conf, info, "the compiler was not built with " &
        "incremental compilation features; bootstrap with " &
        "-d:nimIncremental to enable")
    case arg.normalize
    of "on": conf.symbolFiles = v2Sf
    of "off": conf.symbolFiles = disabledSf
    of "writeonly": conf.symbolFiles = writeOnlySf
    of "readonly": conf.symbolFiles = readOnlySf
    of "v2": conf.symbolFiles = v2Sf
    else: localError(conf, info, "invalid option for --incremental: " & arg)
  of "skipcfg":
    processOnOffSwitchG(conf, {optSkipSystemConfigFile}, arg, pass, info)
  of "skipprojcfg":
    processOnOffSwitchG(conf, {optSkipProjConfigFile}, arg, pass, info)
  of "skipusercfg":
    processOnOffSwitchG(conf, {optSkipUserConfigFile}, arg, pass, info)
  of "skipparentcfg":
    processOnOffSwitchG(conf, {optSkipParentConfigFiles}, arg, pass, info)
  of "genscript", "gendeps":
    processOnOffSwitchG(conf, {optGenScript}, arg, pass, info)
    processOnOffSwitchG(conf, {optCompileOnly}, arg, pass, info)
  of "colors": processOnOffSwitchG(conf, {optUseColors}, arg, pass, info)
  of "lib":
    expectArg(conf, switch, arg, pass, info)
    conf.libpath = processPath(conf, arg, info, notRelativeToProj=true)
  of "putenv":
    expectArg(conf, switch, arg, pass, info)
    splitSwitch(conf, arg, key, val, pass, info)
    os.putEnv(key, val)
  of "cc":
    expectArg(conf, switch, arg, pass, info)
    setCC(conf, arg, info)
  of "track":
    expectArg(conf, switch, arg, pass, info)
    track(conf, arg, info)
  of "trackdirty":
    expectArg(conf, switch, arg, pass, info)
    trackDirty(conf, arg, info)
  of "suggest":
    expectNoArg(conf, switch, arg, pass, info)
    conf.ideCmd = ideSug
  of "def":
    expectNoArg(conf, switch, arg, pass, info)
    conf.ideCmd = ideDef
  of "eval":
    expectArg(conf, switch, arg, pass, info)
    conf.evalExpr = arg
  of "context":
    expectNoArg(conf, switch, arg, pass, info)
    conf.ideCmd = ideCon
  of "usages":
    expectNoArg(conf, switch, arg, pass, info)
    conf.ideCmd = ideUse
  of "stdout":
    processOnOffSwitchG(conf, {optStdout}, arg, pass, info)
  of "listfullpaths":
    processOnOffSwitchG(conf, {optListFullPaths}, arg, pass, info)
  of "dynliboverride":
    dynlibOverride(conf, switch, arg, pass, info)
  of "dynliboverrideall":
    processOnOffSwitchG(conf, {optDynlibOverrideAll}, arg, pass, info)
  of "cs":
    # only supported for compatibility. Does nothing.
    expectArg(conf, switch, arg, pass, info)
  of "experimental":
    if arg.len == 0:
      conf.features.incl oldExperimentalFeatures
    else:
      try:
        conf.features.incl parseEnum[Feature](arg)
      except ValueError:
        localError(conf, info, "unknown experimental feature")
  of "nocppexceptions":
    expectNoArg(conf, switch, arg, pass, info)
    incl(conf.globalOptions, optNoCppExceptions)
    defineSymbol(conf.symbols, "noCppExceptions")
  of "cppdefine":
    expectArg(conf, switch, arg, pass, info)
    if conf != nil:
      conf.cppDefine(arg)
  of "newruntime":
    expectNoArg(conf, switch, arg, pass, info)
    doAssert(conf != nil)
    incl(conf.features, destructor)
    incl(conf.globalOptions, optNimV2)
    defineSymbol(conf.symbols, "nimV2")
    conf.selectedGC = gcDestructors
    defineSymbol(conf.symbols, "gcdestructors")
  of "stylecheck":
    case arg.normalize
    of "off": conf.globalOptions = conf.globalOptions - {optStyleHint, optStyleError}
    of "hint": conf.globalOptions = conf.globalOptions + {optStyleHint}
    of "error": conf.globalOptions = conf.globalOptions + {optStyleError}
    else: localError(conf, info, errOffHintsError % arg)
  of "showallmismatches":
    processOnOffSwitchG(conf, {optShowAllMismatches}, arg, pass, info)
  of "cppcompiletonamespace":
    if arg.len > 0:
      conf.cppCustomNamespace = arg
    else:
      conf.cppCustomNamespace = "Nim"
    defineSymbol(conf.symbols, "cppCompileToNamespace", conf.cppCustomNamespace)
  of "docinternal":
    processOnOffSwitchG(conf, {optDocInternal}, arg, pass, info)
  of "multimethods":
    processOnOffSwitchG(conf, {optMultiMethods}, arg, pass, info)
  else:
    if strutils.find(switch, '.') >= 0: options.setConfigVar(conf, switch, arg)
    else: invalidCmdLineOption(conf, pass, switch, info)

template gCmdLineInfo*(): untyped = newLineInfo(config, AbsoluteFile"command line", 1, 1)

proc processCommand*(switch: string, pass: TCmdLinePass; config: ConfigRef) =
  var cmd, arg: string
  splitSwitch(config, switch, cmd, arg, pass, gCmdLineInfo)
  processSwitch(cmd, arg, pass, gCmdLineInfo, config)


proc processSwitch*(pass: TCmdLinePass; p: OptParser; config: ConfigRef) =
  # hint[X]:off is parsed as (p.key = "hint[X]", p.val = "off")
  # we transform it to (key = hint, val = [X]:off)
  var bracketLe = strutils.find(p.key, '[')
  if bracketLe >= 0:
    var key = substr(p.key, 0, bracketLe - 1)
    var val = substr(p.key, bracketLe) & ':' & p.val
    processSwitch(key, val, pass, gCmdLineInfo, config)
  else:
    processSwitch(p.key, p.val, pass, gCmdLineInfo, config)

proc processArgument*(pass: TCmdLinePass; p: OptParser;
                      argsCount: var int; config: ConfigRef): bool =
  if argsCount == 0:
    # nim filename.nims  is the same as "nim e filename.nims":
    if p.key.endswith(".nims"):
      config.command = "e"
      incl(config.globalOptions, optWasNimscript)
      config.projectName = unixToNativePath(p.key)
      config.arguments = cmdLineRest(p)
      result = true
    elif pass != passCmd2:
      config.command = p.key
  else:
    if pass == passCmd1: config.commandArgs.add p.key
    if argsCount == 1:
      # support UNIX style filenames everywhere for portable build scripts:
      if config.projectName.len == 0:
        config.projectName = unixToNativePath(p.key)
      config.arguments = cmdLineRest(p)
      result = true
  inc argsCount