#
# add_file ".mt-attrs"
#
# add_file "contrib/gitk/gitk-mtn-1.0"
#
# add_file "contrib/gitk/gitk-mtn.README"
#
# add_file "contrib/gitk/graphbranch.patch"
#
# patch ".mt-attrs"
#  from []
#    to [5893d46fb18f74e278d5521ed1c564c444e3abe7]
#
# patch "contrib/gitk/gitk-mtn-1.0"
#  from []
#    to [1fe269b3d4b02ee0fe97fb1f78b3cdd9bf907520]
#
# patch "contrib/gitk/gitk-mtn.README"
#  from []
#    to [724ea74ce85d03d99fe96a02b1c5b0e8b62f0208]
#
# patch "contrib/gitk/graphbranch.patch"
#  from []
#    to [01adf729232ae494cc76ca8343d1fc8d5a518439]
#
--- .mt-attrs
+++ .mt-attrs
@@ -0,0 +1,5 @@
+   file "contrib/gitk/gitk-mtn-1.0"
+execute "true"
+
+   file "contrib/gitk/gitk-mtn-1.0b"
+execute "true"
--- contrib/gitk/gitk-mtn-1.0
+++ contrib/gitk/gitk-mtn-1.0
@@ -0,0 +1,1254 @@
+#!/bin/sh
+# Tcl ignores the next line -*- tcl -*- \
+exec wish "$0" -- "address@hidden"
+
+# Copyright (C) 2005 Paul Mackerras.  All rights reserved.
+# This program is free software; it may be used, copied, modified
+# and distributed under the terms of the GNU General Public Licence,
+# either version 2, or (at your option) any later version.
+#
+# monotone hack by Riccardo Ghetta <address@hidden>
+
+# CVS $Revision: 1.17 $
+
+proc getcommits {rargs} {
+    global commits commfd phase canv mainfont
+    set commits {}
+    set phase getcommits
+    if [catch {set commfd [open "|monotone automate graph $rargs" r]} err] {
+ 	puts stderr "Error executing monotone automate graph: $err"
+	exit 1
+    }
+    fconfigure $commfd -blocking 0
+    fileevent $commfd readable "getcommitline $commfd"
+    $canv delete all
+    $canv create text 3 3 -anchor nw -text "Reading commits..." \
+	-font $mainfont -tags textitems
+}
+
+proc getcommitline {commfd}  {
+    global commits parents cdate nparents children nchildren
+    set n [gets $commfd line]
+    if {$n < 0} {
+	if {![eof $commfd]} return
+	# this works around what is apparently a bug in Tcl...
+	fconfigure $commfd -blocking 1
+	if {![catch {close $commfd} err]} {
+	    after idle drawgraph
+	    return
+	}
+	if {[string range $err 0 4] == "usage"} {
+	    set err "\
+Gitk: error reading commits: bad arguments to git-rev-tree.\n\
+(Note: arguments to gitk are passed to git-rev-tree\
+to allow selection of commits to be displayed.)"
+	} else {
+	    set err "Error reading commits: $err"
+	}
+	error_popup $err
+	exit 1
+    }
+
+    set i 1
+    set cid {}
+    foreach f $line {
+	    set id [lindex $f 0]
+	    if {![info exists nchildren($id)]} {
+		set children($id) {}
+		set nchildren($id) 0
+	    }
+	    if {$i == 1} {
+		set cid $id
+		lappend commits $id
+		set parents($id) {}
+		set nparents($id) 0
+	    } else {
+		lappend parents($cid) $id
+		incr nparents($cid)
+		incr nchildren($id)
+		lappend children($id) $cid
+	    }
+	incr i
+    }
+}
+
+proc readcommit {id} {
+    global commitinfo cdate
+    set inhdr 1
+    set comment {}
+    set headline {}
+    set auname {}
+    set audate {}
+    set comname {}
+    set comdate {}
+    set seen_changelog 0
+    set chlog_line 0
+    if [catch {set contents [exec monotone log --last=1 --revision=$id]}] return
+    foreach line [split $contents "\n"] {
+	if {$inhdr} {
+ 	    if {$line == {} && $seen_changelog} {
+		set inhdr 0
+	    } else {
+		set tag [lindex $line 0]
+               if {$tag == "Author:"} {
+                   set auname [lindex $line 1 ]
+                   set comname [lindex $line 1 ]
+#              } elseif {$tag == "committer"} {
+#                  set x [expr {[llength $line] - 2}]
+#                  set comdate [lindex $line $x]
+#                  set comname [lrange $line 1 [expr {$x - 1}]]
+               } elseif {$tag == "Date:"} {
+                   set audate [lindex $line 1]
+                   set comdate [lindex $line 1]
+                   set cdate($id) [lindex $line 1]
+               } elseif {$tag == "ChangeLog:"} {
+                   set seen_changelog 1
+                   set chlog_line 0
+	       }
+	    }
+	} else {
+           if {$seen_changelog == 1} {
+              if {$headline=={} && $line != {}} {
+                 regexp {^[\s\*]*(.*)} $line match cmt
+                 if { ![string is digit [string range $cmt 0 3]]} {
+                    set headline $cmt
+                 }
+              }
+              append comment "\n"
+              incr chlog_line
+              append comment $line
+            }
+       }
+    }
+#    if {$audate != {}} {
+#      set audate [clock format $audate -format "%Y-%m-%d %H:%M:%S"]
+#    }
+#    if {$comdate != {}} {
+#      set comdate [clock format $comdate -format "%Y-%m-%d %H:%M:%S"]
+#    }
+
+    set commitinfo($id) [list $headline $auname $audate \
+			     $comname $comdate $comment]
+}
+
+proc error_popup msg {
+    set w .error
+    toplevel $w
+    wm transient $w .
+    message $w.m -text $msg -justify center -aspect 400
+    pack $w.m -side top -fill x -padx 20 -pady 20
+    button $w.ok -text OK -command "destroy $w"
+    pack $w.ok -side bottom -fill x
+    bind $w <Visibility> "grab $w; focus $w"
+    tkwait window $w
+}
+
+proc makewindow {} {
+    global canv canv2 canv3 linespc charspc ctext cflist textfont
+    global sha1entry findtype findloc findstring fstring geometry
+
+    menu .bar
+    .bar add cascade -label "File" -menu .bar.file
+    menu .bar.file
+    .bar.file add command -label "Quit" -command doquit
+    menu .bar.help
+    .bar add cascade -label "Help" -menu .bar.help
+    .bar.help add command -label "About gitk" -command about
+    . configure -menu .bar
+
+    if {![info exists geometry(canv1)]} {
+	set geometry(canv1) [expr 45 * $charspc]
+	set geometry(canv2) [expr 30 * $charspc]
+	set geometry(canv3) [expr 15 * $charspc]
+	set geometry(canvh) [expr 25 * $linespc + 4]
+	set geometry(ctextw) 80
+	set geometry(ctexth) 30
+	set geometry(cflistw) 30
+    }
+    panedwindow .ctop -orient vertical
+    if {[info exists geometry(width)]} {
+	.ctop conf -width $geometry(width) -height $geometry(height)
+	set texth [expr {$geometry(height) - $geometry(canvh) - 56}]
+	set geometry(ctexth) [expr {($texth - 8) /
+				    [font metrics $textfont -linespace]}]
+    }
+    frame .ctop.top
+    frame .ctop.top.bar
+    pack .ctop.top.bar -side bottom -fill x
+    set cscroll .ctop.top.csb
+    scrollbar $cscroll -command {allcanvs yview} -highlightthickness 0
+    pack $cscroll -side right -fill y
+    panedwindow .ctop.top.clist -orient horizontal -sashpad 0 -handlesize 4
+    pack .ctop.top.clist -side top -fill both -expand 1
+    .ctop add .ctop.top
+    set canv .ctop.top.clist.canv
+    canvas $canv -height $geometry(canvh) -width $geometry(canv1) \
+	-bg white -bd 0 \
+	-yscrollincr $linespc -yscrollcommand "$cscroll set"
+    .ctop.top.clist add $canv
+    set canv2 .ctop.top.clist.canv2
+    canvas $canv2 -height $geometry(canvh) -width $geometry(canv2) \
+	-bg white -bd 0 -yscrollincr $linespc
+    .ctop.top.clist add $canv2
+    set canv3 .ctop.top.clist.canv3
+    canvas $canv3 -height $geometry(canvh) -width $geometry(canv3) \
+	-bg white -bd 0 -yscrollincr $linespc
+    .ctop.top.clist add $canv3
+    bind .ctop.top.clist <Configure> {resizeclistpanes %W %w}
+
+    set sha1entry .ctop.top.bar.sha1
+    label .ctop.top.bar.sha1label -text "SHA1 ID: "
+    pack .ctop.top.bar.sha1label -side left
+    entry $sha1entry -width 40 -font $textfont -state readonly
+    pack $sha1entry -side left -pady 2
+    button .ctop.top.bar.findbut -text "Find" -command dofind
+    pack .ctop.top.bar.findbut -side left
+    set findstring {}
+    set fstring .ctop.top.bar.findstring
+    entry $fstring -width 30 -font $textfont -textvariable findstring
+    pack $fstring -side left -expand 1 -fill x
+    set findtype Exact
+    tk_optionMenu .ctop.top.bar.findtype findtype Exact IgnCase Regexp
+    set findloc "All fields"
+    tk_optionMenu .ctop.top.bar.findloc findloc "All fields" Headline \
+	Comments Author Committer
+    pack .ctop.top.bar.findloc -side right
+    pack .ctop.top.bar.findtype -side right
+
+    panedwindow .ctop.cdet -orient horizontal
+    .ctop add .ctop.cdet
+    frame .ctop.cdet.left
+    set ctext .ctop.cdet.left.ctext
+    text $ctext -bg white -state disabled -font $textfont \
+	-width $geometry(ctextw) -height $geometry(ctexth) \
+	-yscrollcommand ".ctop.cdet.left.sb set"
+    scrollbar .ctop.cdet.left.sb -command "$ctext yview"
+    pack .ctop.cdet.left.sb -side right -fill y
+    pack $ctext -side left -fill both -expand 1
+    .ctop.cdet add .ctop.cdet.left
+
+    $ctext tag conf filesep -font [concat $textfont bold]
+    $ctext tag conf hunksep -back blue -fore white
+    $ctext tag conf d0 -back "#ff8080"
+    $ctext tag conf d1 -back green
+    $ctext tag conf found -back yellow
+
+    frame .ctop.cdet.right
+    set cflist .ctop.cdet.right.cfiles
+    listbox $cflist -bg white -selectmode extended -width $geometry(cflistw) \
+	-yscrollcommand ".ctop.cdet.right.sb set"
+    scrollbar .ctop.cdet.right.sb -command "$cflist yview"
+    pack .ctop.cdet.right.sb -side right -fill y
+    pack $cflist -side left -fill both -expand 1
+    .ctop.cdet add .ctop.cdet.right
+    bind .ctop.cdet <Configure> {resizecdetpanes %W %w}
+
+    pack .ctop -side top -fill both -expand 1
+
+    bindall <1> {selcanvline %x %y}
+    bindall <B1-Motion> {selcanvline %x %y}
+    bindall <ButtonRelease-4> "allcanvs yview scroll -5 u"
+    bindall <ButtonRelease-5> "allcanvs yview scroll 5 u"
+    bindall <2> "allcanvs scan mark 0 %y"
+    bindall <B2-Motion> "allcanvs scan dragto 0 %y"
+    bind . <Key-Up> "selnextline -1"
+    bind . <Key-Down> "selnextline 1"
+    bind . <Key-Prior> "allcanvs yview scroll -1 p"
+    bind . <Key-Next> "allcanvs yview scroll 1 p"
+    bindkey <Key-Delete> "$ctext yview scroll -1 p"
+    bindkey <Key-BackSpace> "$ctext yview scroll -1 p"
+    bindkey <Key-space> "$ctext yview scroll 1 p"
+    bindkey p "selnextline -1"
+    bindkey n "selnextline 1"
+    bindkey b "$ctext yview scroll -1 p"
+    bindkey d "$ctext yview scroll 18 u"
+    bindkey u "$ctext yview scroll -18 u"
+    bindkey / findnext
+    bindkey ? findprev
+    bindkey f nextfile
+    bind . <Control-q> doquit
+    bind . <Control-f> dofind
+    bind . <Control-g> findnext
+    bind . <Control-r> findprev
+    bind . <Control-equal> {incrfont 1}
+    bind . <Control-KP_Add> {incrfont 1}
+    bind . <Control-minus> {incrfont -1}
+    bind . <Control-KP_Subtract> {incrfont -1}
+    bind $cflist <<ListboxSelect>> listboxsel
+    bind . <Destroy> {savestuff %W}
+    bind . <Button-1> "click %W"
+    bind $fstring <Key-Return> dofind
+}
+
+# when we make a key binding for the toplevel, make sure
+# it doesn't get triggered when that key is pressed in the
+# find string entry widget.
+proc bindkey {ev script} {
+    global fstring
+    bind . $ev $script
+    set escript [bind Entry $ev]
+    if {$escript == {}} {
+	set escript [bind Entry <Key>]
+    }
+    bind $fstring $ev "$escript; break"
+}
+
+# set the focus back to the toplevel for any click outside
+# the find string entry widget
+proc click {w} {
+    global fstring
+    if {$w != $fstring} {
+	focus .
+    }
+}
+
+proc savestuff {w} {
+    global canv canv2 canv3 ctext cflist mainfont textfont
+    global stuffsaved
+    if {$stuffsaved} return
+    if {![winfo viewable .]} return
+    catch {
+	set f [open "~/.gitk-new" w]
+	puts $f "set mainfont {$mainfont}"
+	puts $f "set textfont {$textfont}"
+	puts $f "set geometry(width) [winfo width .ctop]"
+	puts $f "set geometry(height) [winfo height .ctop]"
+	puts $f "set geometry(canv1) [expr [winfo width $canv]-2]"
+	puts $f "set geometry(canv2) [expr [winfo width $canv2]-2]"
+	puts $f "set geometry(canv3) [expr [winfo width $canv3]-2]"
+	puts $f "set geometry(canvh) [expr [winfo height $canv]-2]"
+	set wid [expr {([winfo width $ctext] - 8) \
+			   / [font measure $textfont "0"]}]
+	puts $f "set geometry(ctextw) $wid"
+	set wid [expr {([winfo width $cflist] - 11) \
+			   / [font measure [$cflist cget -font] "0"]}]
+	puts $f "set geometry(cflistw) $wid"
+	close $f
+	file rename -force "~/.gitk-new" "~/.gitk"
+    }
+    set stuffsaved 1
+}
+
+proc resizeclistpanes {win w} {
+    global oldwidth
+    if [info exists oldwidth($win)] {
+	set s0 [$win sash coord 0]
+	set s1 [$win sash coord 1]
+	if {$w < 60} {
+	    set sash0 [expr {int($w/2 - 2)}]
+	    set sash1 [expr {int($w*5/6 - 2)}]
+	} else {
+	    set factor [expr {1.0 * $w / $oldwidth($win)}]
+	    set sash0 [expr {int($factor * [lindex $s0 0])}]
+	    set sash1 [expr {int($factor * [lindex $s1 0])}]
+	    if {$sash0 < 30} {
+		set sash0 30
+	    }
+	    if {$sash1 < $sash0 + 20} {
+		set sash1 [expr $sash0 + 20]
+	    }
+	    if {$sash1 > $w - 10} {
+		set sash1 [expr $w - 10]
+		if {$sash0 > $sash1 - 20} {
+		    set sash0 [expr $sash1 - 20]
+		}
+	    }
+	}
+	$win sash place 0 $sash0 [lindex $s0 1]
+	$win sash place 1 $sash1 [lindex $s1 1]
+    }
+    set oldwidth($win) $w
+}
+
+proc resizecdetpanes {win w} {
+    global oldwidth
+    if [info exists oldwidth($win)] {
+	set s0 [$win sash coord 0]
+	if {$w < 60} {
+	    set sash0 [expr {int($w*3/4 - 2)}]
+	} else {
+	    set factor [expr {1.0 * $w / $oldwidth($win)}]
+	    set sash0 [expr {int($factor * [lindex $s0 0])}]
+	    if {$sash0 < 45} {
+		set sash0 45
+	    }
+	    if {$sash0 > $w - 15} {
+		set sash0 [expr $w - 15]
+	    }
+	}
+	$win sash place 0 $sash0 [lindex $s0 1]
+    }
+    set oldwidth($win) $w
+}
+
+proc allcanvs args {
+    global canv canv2 canv3
+    eval $canv $args
+    eval $canv2 $args
+    eval $canv3 $args
+}
+
+proc bindall {event action} {
+    global canv canv2 canv3
+    bind $canv $event $action
+    bind $canv2 $event $action
+    bind $canv3 $event $action
+}
+
+proc about {} {
+    set w .about
+    if {[winfo exists $w]} {
+	raise $w
+	return
+    }
+    toplevel $w
+    wm title $w "About gitk"
+    message $w.m -text {
+Gitk version 1.0
+
+Copyright © 2005 Paul Mackerras
+
+Use and redistribute under the terms of the GNU General Public License
+
+(CVS $Revision: 1.17 $)} \
+	    -justify center -aspect 400
+    pack $w.m -side top -fill x -padx 20 -pady 20
+    button $w.ok -text Close -command "destroy $w"
+    pack $w.ok -side bottom
+}
+
+proc truncatetofit {str width font} {
+    if {[font measure $font $str] <= $width} {
+	return $str
+    }
+    set best 0
+    set bad [string length $str]
+    set tmp $str
+    while {$best < $bad - 1} {
+	set try [expr {int(($best + $bad) / 2)}]
+	set tmp "[string range $str 0 [expr $try-1]]..."
+	if {[font measure $font $tmp] <= $width} {
+	    set best $try
+	} else {
+	    set bad $try
+	}
+    }
+    return $tmp
+}
+
+proc assigncolor {id} {
+    global commitinfo colormap commcolors colors nextcolor
+    global colorbycommitter
+    global parents nparents children nchildren
+    if [info exists colormap($id)] return
+    set ncolors [llength $colors]
+    if {$colorbycommitter} {
+	if {![info exists commitinfo($id)]} {
+	    readcommit $id
+	}
+	set comm [lindex $commitinfo($id) 3]
+	if {![info exists commcolors($comm)]} {
+	    set commcolors($comm) [lindex $colors $nextcolor]
+	    if {[incr nextcolor] >= $ncolors} {
+		set nextcolor 0
+	    }
+	}
+	set colormap($id) $commcolors($comm)
+    } else {
+	if {$nparents($id) == 1 && $nchildren($id) == 1} {
+	    set child [lindex $children($id) 0]
+	    if {[info exists colormap($child)]
+		&& $nparents($child) == 1} {
+		set colormap($id) $colormap($child)
+		return
+	    }
+	}
+	set badcolors {}
+	foreach child $children($id) {
+	    if {[info exists colormap($child)]
+		&& [lsearch -exact $badcolors $colormap($child)] < 0} {
+		lappend badcolors $colormap($child)
+	    }
+	    if {[info exists parents($child)]} {
+		foreach p $parents($child) {
+		    if {[info exists colormap($p)]
+			&& [lsearch -exact $badcolors $colormap($p)] < 0} {
+			lappend badcolors $colormap($p)
+		    }
+		}
+	    }
+	}
+	if {[llength $badcolors] >= $ncolors} {
+	    set badcolors {}
+	}
+	for {set i 0} {$i <= $ncolors} {incr i} {
+	    set c [lindex $colors $nextcolor]
+	    if {[incr nextcolor] >= $ncolors} {
+		set nextcolor 0
+	    }
+	    if {[lsearch -exact $badcolors $c]} break
+	}
+	set colormap($id) $c
+    }
+}
+
+proc drawgraph {} {
+    global parents children nparents nchildren commits
+    global canv canv2 canv3 mainfont namefont canvx0 canvy0 canvy linespc
+    global datemode cdate
+    global lineid linehtag linentag linedtag commitinfo
+    global nextcolor colormap numcommits
+    global stopped phase redisplaying selectedline
+
+    allcanvs delete all
+    set start {}
+    foreach id [array names nchildren] {
+	if {$nchildren($id) == 0} {
+	    lappend start $id
+	}
+	set ncleft($id) $nchildren($id)
+	if {![info exists nparents($id)]} {
+	    set nparents($id) 0
+	}
+    }
+    if {$start == {}} {
+	error_popup "Gitk: ERROR: No starting commits found"
+	exit 1
+    }
+
+    set nextcolor 0
+    foreach id $start {
+	assigncolor $id
+    }
+    set todo $start
+    set level [expr [llength $todo] - 1]
+    set y2 $canvy0
+    set nullentry -1
+    set lineno -1
+    set numcommits 0
+    set phase drawgraph
+    set lthickness [expr {($linespc / 9) + 1}]
+    while 1 {
+	set canvy $y2
+	allcanvs conf -scrollregion \
+	    [list 0 0 0 [expr $canvy + 0.5 * $linespc + 2]]
+	update
+	if {$stopped} break
+	incr numcommits
+	incr lineno
+	set nlines [llength $todo]
+	set id [lindex $todo $level]
+	set lineid($lineno) $id
+	set actualparents {}
+	if {[info exists parents($id)]} {
+	    foreach p $parents($id) {
+		incr ncleft($p) -1
+		if {![info exists commitinfo($p)]} {
+		    readcommit $p
+		    if {![info exists commitinfo($p)]} continue
+		}
+		lappend actualparents $p
+	    }
+	}
+	if {![info exists commitinfo($id)]} {
+	    readcommit $id
+	    if {![info exists commitinfo($id)]} {
+		set commitinfo($id) {"No commit information available"}
+	    }
+	}
+	set x [expr $canvx0 + $level * $linespc]
+	set y2 [expr $canvy + $linespc]
+	if {[info exists linestarty($level)] && $linestarty($level) < $canvy} {
+	    set t [$canv create line $x $linestarty($level) $x $canvy \
+		       -width $lthickness -fill $colormap($id)]
+	    $canv lower $t
+	}
+	set linestarty($level) $canvy
+	set ofill [expr {[info exists parents($id)]? "blue": "white"}]
+	set orad [expr {$linespc / 3}]
+	set t [$canv create oval [expr $x - $orad] [expr $canvy - $orad] \
+		   [expr $x + $orad - 1] [expr $canvy + $orad - 1] \
+		   -fill $ofill -outline black -width 1]
+	$canv raise $t
+	set xt [expr $canvx0 + $nlines * $linespc]
+	set headline [lindex $commitinfo($id) 0]
+	set name [lindex $commitinfo($id) 1]
+	set date [lindex $commitinfo($id) 2]
+	set linehtag($lineno) [$canv create text $xt $canvy -anchor w \
+				   -text $headline -font $mainfont ]
+	set linentag($lineno) [$canv2 create text 3 $canvy -anchor w \
+				   -text $name -font $namefont]
+	set linedtag($lineno) [$canv3 create text 3 $canvy -anchor w \
+				 -text $date -font $mainfont]
+	if {!$datemode && [llength $actualparents] == 1} {
+	    set p [lindex $actualparents 0]
+	    if {$ncleft($p) == 0 && [lsearch -exact $todo $p] < 0} {
+		assigncolor $p
+		set todo [lreplace $todo $level $level $p]
+		continue
+	    }
+	}
+
+	set oldtodo $todo
+	set oldlevel $level
+	set lines {}
+	for {set i 0} {$i < $nlines} {incr i} {
+	    if {[lindex $todo $i] == {}} continue
+	    if {[info exists linestarty($i)]} {
+		set oldstarty($i) $linestarty($i)
+		unset linestarty($i)
+	    }
+	    if {$i != $level} {
+		lappend lines [list $i [lindex $todo $i]]
+	    }
+	}
+	if {$nullentry >= 0} {
+	    set todo [lreplace $todo $nullentry $nullentry]
+	    if {$nullentry < $level} {
+		incr level -1
+	    }
+	}
+
+	set todo [lreplace $todo $level $level]
+	if {$nullentry > $level} {
+	    incr nullentry -1
+	}
+	set i $level
+	foreach p $actualparents {
+	    set k [lsearch -exact $todo $p]
+	    if {$k < 0} {
+		assigncolor $p
+		set todo [linsert $todo $i $p]
+		if {$nullentry >= $i} {
+		    incr nullentry
+		}
+	    }
+	    lappend lines [list $oldlevel $p]
+	}
+
+	# choose which one to do next time around
+	set todol [llength $todo]
+	set level -1
+	set latest {}
+	for {set k $todol} {[incr k -1] >= 0} {} {
+	    set p [lindex $todo $k]
+	    if {$p == {}} continue
+	    if {$ncleft($p) == 0} {
+		if {$datemode} {
+		    if {$latest == {} || $cdate($p) > $latest} {
+			set level $k
+			set latest $cdate($p)
+		    }
+		} else {
+		    set level $k
+		    break
+		}
+	    }
+	}
+	if {$level < 0} {
+	    if {$todo != {}} {
+		puts "ERROR: none of the pending commits can be done yet:"
+		foreach p $todo {
+		    puts "  $p"
+		}
+	    }
+	    break
+	}
+
+	# If we are reducing, put in a null entry
+	if {$todol < $nlines} {
+	    if {$nullentry >= 0} {
+		set i $nullentry
+		while {$i < $todol
+		       && [lindex $oldtodo $i] == [lindex $todo $i]} {
+		    incr i
+		}
+	    } else {
+		set i $oldlevel
+		if {$level >= $i} {
+		    incr i
+		}
+	    }
+	    if {$i >= $todol} {
+		set nullentry -1
+	    } else {
+		set nullentry $i
+		set todo [linsert $todo $nullentry {}]
+		if {$level >= $i} {
+		    incr level
+		}
+	    }
+	} else {
+	    set nullentry -1
+	}
+
+	foreach l $lines {
+	    set i [lindex $l 0]
+	    set dst [lindex $l 1]
+	    set j [lsearch -exact $todo $dst]
+	    if {$i == $j} {
+		if {[info exists oldstarty($i)]} {
+		    set linestarty($i) $oldstarty($i)
+		}
+		continue
+	    }
+	    set xi [expr {$canvx0 + $i * $linespc}]
+	    set xj [expr {$canvx0 + $j * $linespc}]
+	    set coords {}
+	    if {[info exists oldstarty($i)] && $oldstarty($i) < $canvy} {
+		lappend coords $xi $oldstarty($i)
+	    }
+	    lappend coords $xi $canvy
+	    if {$j < $i - 1} {
+		lappend coords [expr $xj + $linespc] $canvy
+	    } elseif {$j > $i + 1} {
+		lappend coords [expr $xj - $linespc] $canvy
+	    }
+	    lappend coords $xj $y2
+	    set t [$canv create line $coords -width $lthickness \
+		       -fill $colormap($dst)]
+	    $canv lower $t
+	    if {![info exists linestarty($j)]} {
+		set linestarty($j) $y2
+	    }
+	}
+    }
+    set phase {}
+    if {$redisplaying} {
+	if {$stopped == 0 && [info exists selectedline]} {
+	    selectline $selectedline
+	}
+	if {$stopped == 1} {
+	    set stopped 0
+	    after idle drawgraph
+	} else {
+	    set redisplaying 0
+	}
+    }
+}
+
+proc findmatches {f} {
+    global findtype foundstring foundstrlen
+    if {$findtype == "Regexp"} {
+	set matches [regexp -indices -all -inline $foundstring $f]
+    } else {
+	if {$findtype == "IgnCase"} {
+	    set str [string tolower $f]
+	} else {
+	    set str $f
+	}
+	set matches {}
+	set i 0
+	while {[set j [string first $foundstring $str $i]] >= 0} {
+	    lappend matches [list $j [expr $j+$foundstrlen-1]]
+	    set i [expr $j + $foundstrlen]
+	}
+    }
+    return $matches
+}
+
+proc dofind {} {
+    global findtype findloc findstring markedmatches commitinfo
+    global numcommits lineid linehtag linentag linedtag
+    global mainfont namefont canv canv2 canv3 selectedline
+    global matchinglines foundstring foundstrlen
+    unmarkmatches
+    focus .
+    set matchinglines {}
+    set fldtypes {Headline Author Date Committer CDate Comment}
+    if {$findtype == "IgnCase"} {
+	set foundstring [string tolower $findstring]
+    } else {
+	set foundstring $findstring
+    }
+    set foundstrlen [string length $findstring]
+    if {$foundstrlen == 0} return
+    if {![info exists selectedline]} {
+	set oldsel -1
+    } else {
+	set oldsel $selectedline
+    }
+    set didsel 0
+    for {set l 0} {$l < $numcommits} {incr l} {
+	set id $lineid($l)
+	set info $commitinfo($id)
+	set doesmatch 0
+	foreach f $info ty $fldtypes {
+	    if {$findloc != "All fields" && $findloc != $ty} {
+		continue
+	    }
+	    set matches [findmatches $f]
+	    if {$matches == {}} continue
+	    set doesmatch 1
+	    if {$ty == "Headline"} {
+		markmatches $canv $l $f $linehtag($l) $matches $mainfont
+	    } elseif {$ty == "Author"} {
+		markmatches $canv2 $l $f $linentag($l) $matches $namefont
+	    } elseif {$ty == "Date"} {
+		markmatches $canv3 $l $f $linedtag($l) $matches $mainfont
+	    }
+	}
+	if {$doesmatch} {
+	    lappend matchinglines $l
+	    if {!$didsel && $l > $oldsel} {
+		findselectline $l
+		set didsel 1
+	    }
+	}
+    }
+    if {$matchinglines == {}} {
+	bell
+    } elseif {!$didsel} {
+	findselectline [lindex $matchinglines 0]
+    }
+}
+
+proc findselectline {l} {
+    global findloc commentend ctext
+    selectline $l
+    if {$findloc == "All fields" || $findloc == "Comments"} {
+	# highlight the matches in the comments
+	set f [$ctext get 1.0 $commentend]
+	set matches [findmatches $f]
+	foreach match $matches {
+	    set start [lindex $match 0]
+	    set end [expr [lindex $match 1] + 1]
+	    $ctext tag add found "1.0 + $start c" "1.0 + $end c"
+	}
+    }
+}
+
+proc findnext {} {
+    global matchinglines selectedline
+    if {![info exists matchinglines]} {
+	dofind
+	return
+    }
+    if {![info exists selectedline]} return
+    foreach l $matchinglines {
+	if {$l > $selectedline} {
+	    findselectline $l
+	    return
+	}
+    }
+    bell
+}
+
+proc findprev {} {
+    global matchinglines selectedline
+    if {![info exists matchinglines]} {
+	dofind
+	return
+    }
+    if {![info exists selectedline]} return
+    set prev {}
+    foreach l $matchinglines {
+	if {$l >= $selectedline} break
+	set prev $l
+    }
+    if {$prev != {}} {
+	findselectline $prev
+    } else {
+	bell
+    }
+}
+
+proc markmatches {canv l str tag matches font} {
+    set bbox [$canv bbox $tag]
+    set x0 [lindex $bbox 0]
+    set y0 [lindex $bbox 1]
+    set y1 [lindex $bbox 3]
+    foreach match $matches {
+	set start [lindex $match 0]
+	set end [lindex $match 1]
+	if {$start > $end} continue
+	set xoff [font measure $font [string range $str 0 [expr $start-1]]]
+	set xlen [font measure $font [string range $str 0 [expr $end]]]
+	set t [$canv create rect [expr $x0+$xoff] $y0 [expr $x0+$xlen+2] $y1 \
+		   -outline {} -tags matches -fill yellow]
+	$canv lower $t
+    }
+}
+
+proc unmarkmatches {} {
+    global matchinglines
+    allcanvs delete matches
+    catch {unset matchinglines}
+}
+
+proc selcanvline {x y} {
+    global canv canvy0 ctext linespc selectedline
+    global lineid linehtag linentag linedtag
+    set ymax [lindex [$canv cget -scrollregion] 3]
+    set yfrac [lindex [$canv yview] 0]
+    set y [expr {$y + $yfrac * $ymax}]
+    set l [expr {int(($y - $canvy0) / $linespc + 0.5)}]
+    if {$l < 0} {
+	set l 0
+    }
+    if {[info exists selectedline] && $selectedline == $l} return
+    unmarkmatches
+    selectline $l
+}
+
+proc selectline {l} {
+    global canv canv2 canv3 ctext commitinfo selectedline
+    global lineid linehtag linentag linedtag
+    global canvy0 linespc nparents treepending
+    global cflist treediffs currentid sha1entry
+    global commentend seenfile numcommits
+    if {![info exists lineid($l)] || ![info exists linehtag($l)]} return
+    $canv delete secsel
+    set t [eval $canv create rect [$canv bbox $linehtag($l)] -outline {{}} \
+	       -tags secsel -fill [$canv cget -selectbackground]]
+    $canv lower $t
+    $canv2 delete secsel
+    set t [eval $canv2 create rect [$canv2 bbox $linentag($l)] -outline {{}} \
+	       -tags secsel -fill [$canv2 cget -selectbackground]]
+    $canv2 lower $t
+    $canv3 delete secsel
+    set t [eval $canv3 create rect [$canv3 bbox $linedtag($l)] -outline {{}} \
+	       -tags secsel -fill [$canv3 cget -selectbackground]]
+    $canv3 lower $t
+    set y [expr {$canvy0 + $l * $linespc}]
+    set ymax [lindex [$canv cget -scrollregion] 3]
+    set ytop [expr {$y - $linespc - 1}]
+    set ybot [expr {$y + $linespc + 1}]
+    set wnow [$canv yview]
+    set wtop [expr [lindex $wnow 0] * $ymax]
+    set wbot [expr [lindex $wnow 1] * $ymax]
+    set wh [expr {$wbot - $wtop}]
+    set newtop $wtop
+    if {$ytop < $wtop} {
+	if {$ybot < $wtop} {
+	    set newtop [expr {$y - $wh / 2.0}]
+	} else {
+	    set newtop $ytop
+	    if {$newtop > $wtop - $linespc} {
+		set newtop [expr {$wtop - $linespc}]
+	    }
+	}
+    } elseif {$ybot > $wbot} {
+	if {$ytop > $wbot} {
+	    set newtop [expr {$y - $wh / 2.0}]
+	} else {
+	    set newtop [expr {$ybot - $wh}]
+	    if {$newtop < $wtop + $linespc} {
+		set newtop [expr {$wtop + $linespc}]
+	    }
+	}
+    }
+    if {$newtop != $wtop} {
+	if {$newtop < 0} {
+	    set newtop 0
+	}
+	allcanvs yview moveto [expr $newtop * 1.0 / $ymax]
+    }
+    set selectedline $l
+
+    set id $lineid($l)
+    $sha1entry conf -state normal
+    $sha1entry delete 0 end
+    $sha1entry insert 0 $id
+    $sha1entry selection from 0
+    $sha1entry selection to end
+    $sha1entry conf -state readonly
+
+    $ctext conf -state normal
+    $ctext delete 0.0 end
+    set info $commitinfo($id)
+    $ctext insert end "Author: [lindex $info 1]  [lindex $info 2]\n"
+    $ctext insert end "Committer: [lindex $info 3]  [lindex $info 4]\n"
+    $ctext insert end "\n"
+    $ctext insert end [lindex $info 5]
+    $ctext insert end "\n"
+    $ctext tag delete Comments
+    $ctext tag remove found 1.0 end
+    $ctext conf -state disabled
+    set commentend [$ctext index "end - 1c"]
+
+    $cflist delete 0 end
+    set currentid $id
+    if {$nparents($id) == 1} {
+	if {![info exists treediffs($id)]} {
+	    if {![info exists treepending]} {
+		gettreediffs $id
+	    }
+	} else {
+	    addtocflist $id
+	}
+    }
+    catch {unset seenfile}
+}
+
+proc selnextline {dir} {
+    global selectedline
+    if {![info exists selectedline]} return
+    set l [expr $selectedline + $dir]
+    unmarkmatches
+    selectline $l
+}
+
+proc addtocflist {id} {
+    global currentid treediffs cflist treepending
+    if {$id != $currentid} {
+	gettreediffs $currentid
+	return
+    }
+    $cflist insert end "All files"
+    foreach f $treediffs($currentid) {
+	$cflist insert end $f
+    }
+    getblobdiffs $id
+}
+
+proc gettreediffs {id} {
+    global treediffs parents treepending
+    set treepending $id
+    set treediffs($id) {}
+    set p [lindex $parents($id) 0]
+    if [catch {set gdtf [open "|monotone diff --revision=$p --revision=$id" r]}] return
+    fconfigure $gdtf -blocking 0
+    fileevent $gdtf readable "gettreediffline $gdtf $id"
+}
+
+proc gettreediffline {gdtf id} {
+    global treediffs treepending
+    set n [gets $gdtf line]
+    if {$n < 0} {
+	if {![eof $gdtf]} return
+	close $gdtf
+	unset treepending
+	addtocflist $id
+	return
+    }
+#    set type [lindex $line 1]
+#    set file [lindex $line 3]
+    if {[regexp {^\# patch \"(.*)\"} $line match fname]} {
+	lappend treediffs($id) $fname
+    }
+}
+
+proc getblobdiffs {id} {
+    global parents diffopts blobdifffd env curdifftag curtagstart
+    global diffindex difffilestart
+    set p [lindex $parents($id) 0]
+    set env(GIT_DIFF_OPTS) $diffopts
+    if [catch {set bdf [open "|monotone diff --revision=$p --revision=$id" r]} err] {
+	puts "error getting diffs: $err"
+	return
+    }
+    fconfigure $bdf -blocking 0
+    set blobdifffd($id) $bdf
+    set curdifftag Comments
+    set curtagstart 0.0
+    set diffindex 0
+    catch {unset difffilestart}
+    fileevent $bdf readable "getblobdiffline $bdf $id"
+}
+
+proc getblobdiffline {bdf id} {
+    global currentid blobdifffd ctext curdifftag curtagstart seenfile
+    global diffnexthead diffnextnote diffindex difffilestart
+    set n [gets $bdf line]
+    if {$n < 0} {
+	if {[eof $bdf]} {
+	    close $bdf
+	    if {$id == $currentid && $bdf == $blobdifffd($id)} {
+		$ctext tag add $curdifftag $curtagstart end
+		set seenfile($curdifftag) 1
+	    }
+	}
+	return
+    }
+    if {$id != $currentid || $bdf != $blobdifffd($id)} {
+	return
+    }
+    $ctext conf -state normal
+    if {[regexp {^---[ \t]+([^/])*/(.*)} $line match s1 fname]} {
+	# start of a new file
+	$ctext insert end "\n"
+	$ctext tag add $curdifftag $curtagstart end
+	set seenfile($curdifftag) 1
+	set curtagstart [$ctext index "end - 1c"]
+	set header $fname
+	if {[info exists diffnexthead]} {
+	    set fname $diffnexthead
+	    set header "$diffnexthead ($diffnextnote)"
+	    unset diffnexthead
+	}
+	set difffilestart($diffindex) [$ctext index "end - 1c"]
+	incr diffindex
+	set curdifftag "f:$fname"
+	$ctext tag delete $curdifftag
+	set l [expr {(78 - [string length $header]) / 2}]
+	set pad [string range "----------------------------------------" 1 $l]
+	$ctext insert end "$pad $header $pad\n" filesep
+    } elseif {[string range $line 0 2] == "+++"} {
+	# no need to do anything with this
+    } elseif {[regexp {^Created: (.*) \((mode: *[0-7]*)\)} $line match fn m]} {
+	set diffnexthead $fn
+	set diffnextnote "created, mode $m"
+    } elseif {[string range $line 0 8] == "Deleted: "} {
+	set diffnexthead [string range $line 9 end]
+	set diffnextnote "deleted"
+    } elseif {[regexp {^diff --git a/(.*) b/} $line match fn]} {
+	# save the filename in case the next thing is "new file mode ..."
+	set diffnexthead $fn
+	set diffnextnote "modified"
+    } elseif {[regexp {^new file mode ([0-7]+)} $line match m]} {
+	set diffnextnote "new file, mode $m"
+    } elseif {[string range $line 0 11] == "deleted file"} {
+	set diffnextnote "deleted"
+    } elseif {[regexp {^@@ -([0-9]+),([0-9]+) \+([0-9]+),([0-9]+) @@(.*)} \
+		   $line match f1l f1c f2l f2c rest]} {
+	$ctext insert end "\t" hunksep
+	$ctext insert end "    $f1l    " d0 "    $f2l    " d1
+	$ctext insert end "    $rest \n" hunksep
+    } else {
+	set x [string range $line 0 0]
+	if {$x == "-" || $x == "+"} {
+	    set tag [expr {$x == "+"}]
+	    set line [string range $line 1 end]
+	    $ctext insert end "$line\n" d$tag
+	} elseif {$x == " "} {
+	    set line [string range $line 1 end]
+	    $ctext insert end "$line\n"
+	} elseif {$x == "\\"} {
+	    # e.g. "\ No newline at end of file"
+	    $ctext insert end "$line\n" filesep
+	} else {
+	    # Something else we don't recognize
+	    if {$curdifftag != "Comments"} {
+		$ctext insert end "\n"
+		$ctext tag add $curdifftag $curtagstart end
+		set seenfile($curdifftag) 1
+		set curtagstart [$ctext index "end - 1c"]
+		set curdifftag Comments
+	    }
+	    $ctext insert end "$line\n" filesep
+	}
+    }
+    $ctext conf -state disabled
+}
+
+proc nextfile {} {
+    global difffilestart ctext
+    set here [$ctext index @0,0]
+    for {set i 0} {[info exists difffilestart($i)]} {incr i} {
+	if {[$ctext compare $difffilestart($i) > $here]} {
+	    $ctext yview $difffilestart($i)
+	    break
+	}
+    }
+}
+
+proc listboxsel {} {
+    global ctext cflist currentid treediffs seenfile
+    if {![info exists currentid]} return
+    set sel [$cflist curselection]
+    if {$sel == {} || [lsearch -exact $sel 0] >= 0} {
+	# show everything
+	$ctext tag conf Comments -elide 0
+	foreach f $treediffs($currentid) {
+	    if [info exists seenfile(f:$f)] {
+		$ctext tag conf "f:$f" -elide 0
+	    }
+	}
+    } else {
+	# just show selected files
+	$ctext tag conf Comments -elide 1
+	set i 1
+	foreach f $treediffs($currentid) {
+	    set elide [expr {[lsearch -exact $sel $i] < 0}]
+	    if [info exists seenfile(f:$f)] {
+		$ctext tag conf "f:$f" -elide $elide
+	    }
+	    incr i
+	}
+    }
+}
+
+proc setcoords {} {
+    global linespc charspc canvx0 canvy0 mainfont
+    set linespc [font metrics $mainfont -linespace]
+    set charspc [font measure $mainfont "m"]
+    set canvy0 [expr 3 + 0.5 * $linespc]
+    set canvx0 [expr 3 + 0.5 * $linespc]
+}
+
+proc redisplay {} {
+    global selectedline stopped redisplaying phase
+    if {$stopped > 1} return
+    if {$phase == "getcommits"} return
+    set redisplaying 1
+    if {$phase == "drawgraph"} {
+	set stopped 1
+    } else {
+	drawgraph
+    }
+}
+
+proc incrfont {inc} {
+    global mainfont namefont textfont selectedline ctext canv phase
+    global stopped
+    unmarkmatches
+    set mainfont [lreplace $mainfont 1 1 [expr {[lindex $mainfont 1] + $inc}]]
+    set namefont [lreplace $namefont 1 1 [expr {[lindex $namefont 1] + $inc}]]
+    set textfont [lreplace $textfont 1 1 [expr {[lindex $textfont 1] + $inc}]]
+    setcoords
+    $ctext conf -font $textfont
+    $ctext tag conf filesep -font [concat $textfont bold]
+    if {$phase == "getcommits"} {
+	$canv itemconf textitems -font $mainfont
+    }
+    redisplay
+}
+
+proc doquit {} {
+    global stopped
+    set stopped 100
+    destroy .
+}
+
+# defaults...
+set datemode 0
+set boldnames 0
+set diffopts "-U 5 -p"
+
+set mainfont {Helvetica 9}
+set textfont {Courier 9}
+
+set colors {green red blue magenta darkgrey brown orange}
+set colorbycommitter false
+
+catch {source ~/.gitk}
+
+set namefont $mainfont
+if {$boldnames} {
+    lappend namefont bold
+}
+
+set revtreeargs {}
+foreach arg $argv {
+    switch -regexp -- $arg {
+	"^$" { }
+	"^-b" { set boldnames 1 }
+	"^-c" { set colorbycommitter 1 }
+	"^-d" { set datemode 1 }
+	"^-.*" {
+	    puts stderr "unrecognized option $arg"
+	    exit 1
+	}
+	default {
+	    lappend revtreeargs $arg
+	}
+    }
+}
+
+set stopped 0
+set redisplaying 0
+set stuffsaved 0
+setcoords
+makewindow
+getcommits $revtreeargs
--- contrib/gitk/gitk-mtn.README
+++ contrib/gitk/gitk-mtn.README
@@ -0,0 +1,20 @@
+
+BEWARE! gitk-mtn (unlike gitk) is just pre-pre-alpha. Not everything works.
+DON'T SELECT ANYTHING IN THE FILE PANE.	YOU HAVE BEEN WARNED.
+
+gitk-mtn-1.0 is a slightly hacked version of gitk-1.0, the git commit viewer by
+Paul Mackerras (address@hidden).
+
+It needs a recent monotone (0.20 at least) with the log command using --last
+instead of --depth.  If your monotone log command still uses --depth, change
+line 86 accordingly.
+
+It also uses "automate graph", which dumps the entire db, making the resulting
+gitk output almost unreadable.
+To have a saner display (just the current branch), apply the graphbranch.patch
+to your monotone sources and rebuild. Use the resulting monotone with gitk-mtn.
+
+Usage:
+ invoke gitk-mtn-1.0 in a monotone working dir.  monotone executable should be
+in your path.
+
--- contrib/gitk/graphbranch.patch
+++ contrib/gitk/graphbranch.patch
@@ -0,0 +1,61 @@
+#
+# patch "automate.cc"
+#  from [646411d161574bb13a8cb76ff8f8abd28de310ba]
+#    to [2112d41f871e2426218ac91262c57de80c5d4ba8]
+#
+# patch "database.cc"
+#  from [181e7b79e4435b2ffa1561ce8b9162a41563ed72]
+#    to [e4096c5d61872fefdd663d619705b5c986bf995d]
+#
+# patch "database.hh"
+#  from [402c6310d759c4934fc19ba823f2536ca3251d46]
+#    to [dd7b020f6deb593492f2c9cb8f07f1d44ca93a5e]
+#
+--- automate.cc
++++ automate.cc
+@@ -451,7 +451,8 @@
+   std::multimap<revision_id, revision_id> edges_mmap;
+   std::map<revision_id, std::set<revision_id> > child_to_parents;
+
+-  app.db.get_revision_ancestry(edges_mmap);
++//  app.db.get_revision_ancestry(edges_mmap);
++  app.db.get_branch_ancestry(edges_mmap, app.branch_name);
+
+   for (std::multimap<revision_id, revision_id>::const_iterator i = edges_mmap.begin();
+        i != edges_mmap.end(); ++i)
+--- database.cc
++++ database.cc
+@@ -1355,6 +1355,21 @@
+ }
+
+ void
++database::get_branch_ancestry(std::multimap<revision_id, revision_id> & graph, const utf8 &branch)
++{
++  results res;
++  graph.clear();
++  fetch(res, 2, any_rows,
++        (F("SELECT parent,child FROM revision_ancestry,revision_certs where "
++        "id=child and name='%s' and unbase64(value) glob '%s' ")
++        % branch_cert_name
++        % branch).str().c_str()  );
++  for (size_t i = 0; i < res.size(); ++i)
++    graph.insert(std::make_pair(revision_id(res[i][0]),
++                                revision_id(res[i][1])));
++}
++
++void
+ database::get_revision_parents(revision_id const & id,
+                               set<revision_id> & parents)
+ {
+--- database.hh
++++ database.hh
+@@ -265,6 +265,9 @@
+
+   void get_revision_ancestry(std::multimap<revision_id, revision_id> & graph);
+
++  void get_branch_ancestry(std::multimap<revision_id, revision_id> & graph,
++                           const utf8 &branch);
++
+   void get_revision_parents(revision_id const & id,
+                            std::set<revision_id> & parents);
+