merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 1132 insertions, 0 deletions

diff --git a/third_party/git/git-gui/lib/choose_repository.tcl b/third_party/git/git-gui/lib/choose_repository.tcl
new file mode 100644
index 000000000000..80f5a59bbbfc
--- /dev/null
+++ b/third_party/git/git-gui/lib/choose_repository.tcl
@@ -0,0 +1,1132 @@
+# git-gui Git repository chooser
+# Copyright (C) 2007 Shawn Pearce
+
+class choose_repository {
+
+field top
+field w
+field w_body      ; # Widget holding the center content
+field w_next      ; # Next button
+field w_quit      ; # Quit button
+field o_cons      ; # Console object (if active)
+field w_types     ; # List of type buttons in clone
+field w_recentlist ; # Listbox containing recent repositories
+field w_localpath  ; # Entry widget bound to local_path
+
+field done              0 ; # Finished picking the repository?
+field local_path       {} ; # Where this repository is locally
+field origin_url       {} ; # Where we are cloning from
+field origin_name  origin ; # What we shall call 'origin'
+field clone_type hardlink ; # Type of clone to construct
+field recursive      true ; # Recursive cloning flag
+field readtree_err        ; # Error output from read-tree (if any)
+field sorted_recent       ; # recent repositories (sorted)
+
+constructor pick {} {
+	global M1T M1B use_ttk NS
+
+	if {[set maxrecent [get_config gui.maxrecentrepo]] eq {}} {
+		set maxrecent 10
+	}
+
+	make_dialog top w
+	wm title $top [mc "Git Gui"]
+
+	if {$top eq {.}} {
+		menu $w.mbar -tearoff 0
+		$top configure -menu $w.mbar
+
+		set m_repo $w.mbar.repository
+		$w.mbar add cascade \
+			-label [mc Repository] \
+			-menu $m_repo
+		menu $m_repo
+
+		if {[is_MacOSX]} {
+			$w.mbar add cascade -label Apple -menu .mbar.apple
+			menu $w.mbar.apple
+			$w.mbar.apple add command \
+				-label [mc "About %s" [appname]] \
+				-command do_about
+			$w.mbar.apple add command \
+				-label [mc "Show SSH Key"] \
+				-command do_ssh_key
+		} else {
+			$w.mbar add cascade -label [mc Help] -menu $w.mbar.help
+			menu $w.mbar.help
+			$w.mbar.help add command \
+				-label [mc "About %s" [appname]] \
+				-command do_about
+			$w.mbar.help add command \
+				-label [mc "Show SSH Key"] \
+				-command do_ssh_key
+		}
+
+		wm protocol $top WM_DELETE_WINDOW exit
+		bind $top <$M1B-q> exit
+		bind $top <$M1B-Q> exit
+		bind $top <Key-Escape> exit
+	} else {
+		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
+		bind $top <Key-Escape> [list destroy $top]
+		set m_repo {}
+	}
+
+	pack [git_logo $w.git_logo] -side left -fill y -padx 10 -pady 10
+
+	set w_body $w.body
+	set opts $w_body.options
+	${NS}::frame $w_body
+	text $opts \
+		-cursor $::cursor_ptr \
+		-relief flat \
+		-background [get_bg_color $w_body] \
+		-wrap none \
+		-spacing1 5 \
+		-width 50 \
+		-height 3
+	pack $opts -anchor w -fill x
+
+	$opts tag conf link_new -foreground blue -underline 1
+	$opts tag bind link_new <1> [cb _next new]
+	$opts insert end [mc "Create New Repository"] link_new
+	$opts insert end "\n"
+	if {$m_repo ne {}} {
+		$m_repo add command \
+			-command [cb _next new] \
+			-accelerator $M1T-N \
+			-label [mc "New..."]
+		bind $top <$M1B-n> [cb _next new]
+		bind $top <$M1B-N> [cb _next new]
+	}
+
+	$opts tag conf link_clone -foreground blue -underline 1
+	$opts tag bind link_clone <1> [cb _next clone]
+	$opts insert end [mc "Clone Existing Repository"] link_clone
+	$opts insert end "\n"
+	if {$m_repo ne {}} {
+		if {[tk windowingsystem] eq "win32"} {
+			set key L
+		} else {
+			set key C
+		}
+		$m_repo add command \
+			-command [cb _next clone] \
+			-accelerator $M1T-$key \
+			-label [mc "Clone..."]
+		bind $top <$M1B-[string tolower $key]> [cb _next clone]
+		bind $top <$M1B-[string toupper $key]> [cb _next clone]
+	}
+
+	$opts tag conf link_open -foreground blue -underline 1
+	$opts tag bind link_open <1> [cb _next open]
+	$opts insert end [mc "Open Existing Repository"] link_open
+	$opts insert end "\n"
+	if {$m_repo ne {}} {
+		$m_repo add command \
+			-command [cb _next open] \
+			-accelerator $M1T-O \
+			-label [mc "Open..."]
+		bind $top <$M1B-o> [cb _next open]
+		bind $top <$M1B-O> [cb _next open]
+	}
+
+	$opts conf -state disabled
+
+	set sorted_recent [_get_recentrepos]
+	if {[llength $sorted_recent] > 0} {
+		if {$m_repo ne {}} {
+			$m_repo add separator
+			$m_repo add command \
+				-state disabled \
+				-label [mc "Recent Repositories"]
+		}
+
+	if {[set lenrecent [llength $sorted_recent]] < $maxrecent} {
+		set lenrecent $maxrecent
+	}
+
+		${NS}::label $w_body.space
+		${NS}::label $w_body.recentlabel \
+			-anchor w \
+			-text [mc "Open Recent Repository:"]
+		set w_recentlist $w_body.recentlist
+		text $w_recentlist \
+			-cursor $::cursor_ptr \
+			-relief flat \
+			-background [get_bg_color $w_body.recentlabel] \
+			-wrap none \
+			-width 50 \
+			-height $lenrecent
+		$w_recentlist tag conf link \
+			-foreground blue \
+			-underline 1
+		set home $::env(HOME)
+		if {[is_Cygwin]} {
+			set home [exec cygpath --windows --absolute $home]
+		}
+		set home "[file normalize $home]/"
+		set hlen [string length $home]
+		foreach p $sorted_recent {
+			set path $p
+			if {[string equal -length $hlen $home $p]} {
+				set p "~/[string range $p $hlen end]"
+			}
+			regsub -all "\n" $p "\\n" p
+			$w_recentlist insert end $p link
+			$w_recentlist insert end "\n"
+
+			if {$m_repo ne {}} {
+				$m_repo add command \
+					-command [cb _open_recent_path $path] \
+					-label "    $p"
+			}
+		}
+		$w_recentlist conf -state disabled
+		$w_recentlist tag bind link <1> [cb _open_recent %x,%y]
+		pack $w_body.space -anchor w -fill x
+		pack $w_body.recentlabel -anchor w -fill x
+		pack $w_recentlist -anchor w -fill x
+	}
+	pack $w_body -fill x -padx 10 -pady 10
+
+	${NS}::frame $w.buttons
+	set w_next $w.buttons.next
+	set w_quit $w.buttons.quit
+	${NS}::button $w_quit \
+		-text [mc "Quit"] \
+		-command exit
+	pack $w_quit -side right -padx 5
+	pack $w.buttons -side bottom -fill x -padx 10 -pady 10
+
+	if {$m_repo ne {}} {
+		$m_repo add separator
+		$m_repo add command \
+			-label [mc Quit] \
+			-command exit \
+			-accelerator $M1T-Q
+	}
+
+	bind $top <Return> [cb _invoke_next]
+	bind $top <Visibility> "
+		[cb _center]
+		grab $top
+		focus $top
+		bind $top <Visibility> {}
+	"
+	wm deiconify $top
+	tkwait variable @done
+
+	grab release $top
+	if {$top eq {.}} {
+		eval destroy [winfo children $top]
+	}
+}
+
+method _center {} {
+	set nx [winfo reqwidth $top]
+	set ny [winfo reqheight $top]
+	set rx [expr {([winfo screenwidth  $top] - $nx) / 3}]
+	set ry [expr {([winfo screenheight $top] - $ny) / 3}]
+	wm geometry $top [format {+%d+%d} $rx $ry]
+}
+
+method _invoke_next {} {
+	if {[winfo exists $w_next]} {
+		uplevel #0 [$w_next cget -command]
+	}
+}
+
+proc _get_recentrepos {} {
+	set recent [list]
+	foreach p [lsort -unique [get_config gui.recentrepo]] {
+		if {[_is_git [file join $p .git]]} {
+			lappend recent $p
+		} else {
+			_unset_recentrepo $p
+		}
+	}
+	return $recent
+}
+
+proc _unset_recentrepo {p} {
+	regsub -all -- {([()\[\]{}\.^$+*?\\])} $p {\\\1} p
+	catch {git config --global --unset-all gui.recentrepo "^$p\$"}
+	load_config 1
+}
+
+proc _append_recentrepos {path} {
+	set path [file normalize $path]
+	set recent [get_config gui.recentrepo]
+
+	if {[lindex $recent end] eq $path} {
+		return
+	}
+
+	set i [lsearch $recent $path]
+	if {$i >= 0} {
+		_unset_recentrepo $path
+	}
+
+	git config --global --add gui.recentrepo $path
+	load_config 1
+	set recent [get_config gui.recentrepo]
+
+	if {[set maxrecent [get_config gui.maxrecentrepo]] eq {}} {
+		set maxrecent 10
+	}
+
+	while {[llength $recent] > $maxrecent} {
+		_unset_recentrepo [lindex $recent 0]
+		set recent [get_config gui.recentrepo]
+	}
+}
+
+method _open_recent {xy} {
+	set id [lindex [split [$w_recentlist index @$xy] .] 0]
+	set local_path [lindex $sorted_recent [expr {$id - 1}]]
+	_do_open2 $this
+}
+
+method _open_recent_path {p} {
+	set local_path $p
+	_do_open2 $this
+}
+
+method _next {action} {
+	global NS
+	destroy $w_body
+	if {![winfo exists $w_next]} {
+		${NS}::button $w_next -default active
+		set pos -before
+		if {[tk windowingsystem] eq "win32"} { set pos -after }
+		pack $w_next -side right -padx 5 $pos $w_quit
+	}
+	_do_$action $this
+}
+
+method _write_local_path {args} {
+	if {$local_path eq {}} {
+		$w_next conf -state disabled
+	} else {
+		$w_next conf -state normal
+	}
+}
+
+method _git_init {} {
+	if {[catch {file mkdir $local_path} err]} {
+		error_popup [strcat \
+			[mc "Failed to create repository %s:" $local_path] \
+			"\n\n$err"]
+		return 0
+	}
+
+	if {[catch {cd $local_path} err]} {
+		error_popup [strcat \
+			[mc "Failed to create repository %s:" $local_path] \
+			"\n\n$err"]
+		return 0
+	}
+
+	if {[catch {git init} err]} {
+		error_popup [strcat \
+			[mc "Failed to create repository %s:" $local_path] \
+			"\n\n$err"]
+		return 0
+	}
+
+	_append_recentrepos [pwd]
+	set ::_gitdir .git
+	set ::_prefix {}
+	return 1
+}
+
+proc _is_git {path {outdir_var ""}} {
+	if {$outdir_var ne ""} {
+		upvar 1 $outdir_var outdir
+	}
+	if {[file isfile $path]} {
+		set fp [open $path r]
+		gets $fp line
+		close $fp
+		if {[regexp "^gitdir: (.+)$" $line line link_target]} {
+			set path [file join [file dirname $path] $link_target]
+			set path [file normalize $path]
+		}
+	}
+
+	if {[file exists [file join $path HEAD]]
+	 && [file exists [file join $path objects]]
+	 && [file exists [file join $path config]]} {
+		set outdir $path
+		return 1
+	}
+	if {[is_Cygwin]} {
+		if {[file exists [file join $path HEAD]]
+		 && [file exists [file join $path objects.lnk]]
+		 && [file exists [file join $path config.lnk]]} {
+			set outdir $path
+			return 1
+		}
+	}
+	return 0
+}
+
+proc _objdir {path} {
+	set objdir [file join $path .git objects]
+	if {[file isdirectory $objdir]} {
+		return $objdir
+	}
+
+	set objdir [file join $path objects]
+	if {[file isdirectory $objdir]} {
+		return $objdir
+	}
+
+	if {[is_Cygwin]} {
+		set objdir [file join $path .git objects.lnk]
+		if {[file isfile $objdir]} {
+			return [win32_read_lnk $objdir]
+		}
+
+		set objdir [file join $path objects.lnk]
+		if {[file isfile $objdir]} {
+			return [win32_read_lnk $objdir]
+		}
+	}
+
+	return {}
+}
+
+######################################################################
+##
+## Create New Repository
+
+method _do_new {} {
+	global use_ttk NS
+	$w_next conf \
+		-state disabled \
+		-command [cb _do_new2] \
+		-text [mc "Create"]
+
+	${NS}::frame $w_body
+	${NS}::label $w_body.h \
+		-font font_uibold -anchor center \
+		-text [mc "Create New Repository"]
+	pack $w_body.h -side top -fill x -pady 10
+	pack $w_body -fill x -padx 10
+
+	${NS}::frame $w_body.where
+	${NS}::label $w_body.where.l -text [mc "Directory:"]
+	${NS}::entry $w_body.where.t \
+		-textvariable @local_path \
+		-width 50
+	${NS}::button $w_body.where.b \
+		-text [mc "Browse"] \
+		-command [cb _new_local_path]
+	set w_localpath $w_body.where.t
+
+	grid $w_body.where.l $w_body.where.t $w_body.where.b -sticky ew
+	pack $w_body.where -fill x
+
+	grid columnconfigure $w_body.where 1 -weight 1
+
+	trace add variable @local_path write [cb _write_local_path]
+	bind $w_body.h <Destroy> [list trace remove variable @local_path write [cb _write_local_path]]
+	update
+	focus $w_body.where.t
+}
+
+method _new_local_path {} {
+	if {$local_path ne {}} {
+		set p [file dirname $local_path]
+	} else {
+		set p [pwd]
+	}
+
+	set p [tk_chooseDirectory \
+		-initialdir $p \
+		-parent $top \
+		-title [mc "Git Repository"] \
+		-mustexist false]
+	if {$p eq {}} return
+
+	set p [file normalize $p]
+	if {![_new_ok $p]} {
+		return
+	}
+	set local_path $p
+	$w_localpath icursor end
+}
+
+method _do_new2 {} {
+	if {![_new_ok $local_path]} {
+		return
+	}
+	if {![_git_init $this]} {
+		return
+	}
+	set done 1
+}
+
+proc _new_ok {p} {
+	if {[file isdirectory $p]} {
+		if {[_is_git [file join $p .git]]} {
+			error_popup [mc "Directory %s already exists." $p]
+			return 0
+		}
+	} elseif {[file exists $p]} {
+		error_popup [mc "File %s already exists." $p]
+		return 0
+	}
+	return 1
+}
+
+######################################################################
+##
+## Clone Existing Repository
+
+method _do_clone {} {
+	global use_ttk NS
+	$w_next conf \
+		-state disabled \
+		-command [cb _do_clone2] \
+		-text [mc "Clone"]
+
+	${NS}::frame $w_body
+	${NS}::label $w_body.h \
+		-font font_uibold -anchor center \
+		-text [mc "Clone Existing Repository"]
+	pack $w_body.h -side top -fill x -pady 10
+	pack $w_body -fill x -padx 10
+
+	set args $w_body.args
+	${NS}::frame $w_body.args
+	pack $args -fill both
+
+	${NS}::label $args.origin_l -text [mc "Source Location:"]
+	${NS}::entry $args.origin_t \
+		-textvariable @origin_url \
+		-width 50
+	${NS}::button $args.origin_b \
+		-text [mc "Browse"] \
+		-command [cb _open_origin]
+	grid $args.origin_l $args.origin_t $args.origin_b -sticky ew
+
+	${NS}::label $args.where_l -text [mc "Target Directory:"]
+	${NS}::entry $args.where_t \
+		-textvariable @local_path \
+		-width 50
+	${NS}::button $args.where_b \
+		-text [mc "Browse"] \
+		-command [cb _new_local_path]
+	grid $args.where_l $args.where_t $args.where_b -sticky ew
+	set w_localpath $args.where_t
+
+	${NS}::label $args.type_l -text [mc "Clone Type:"]
+	${NS}::frame $args.type_f
+	set w_types [list]
+	lappend w_types [${NS}::radiobutton $args.type_f.hardlink \
+		-state disabled \
+		-text [mc "Standard (Fast, Semi-Redundant, Hardlinks)"] \
+		-variable @clone_type \
+		-value hardlink]
+	lappend w_types [${NS}::radiobutton $args.type_f.full \
+		-state disabled \
+		-text [mc "Full Copy (Slower, Redundant Backup)"] \
+		-variable @clone_type \
+		-value full]
+	lappend w_types [${NS}::radiobutton $args.type_f.shared \
+		-state disabled \
+		-text [mc "Shared (Fastest, Not Recommended, No Backup)"] \
+		-variable @clone_type \
+		-value shared]
+	foreach r $w_types {
+		pack $r -anchor w
+	}
+	${NS}::checkbutton $args.type_f.recursive \
+		-text [mc "Recursively clone submodules too"] \
+		-variable @recursive \
+		-onvalue true -offvalue false
+	pack $args.type_f.recursive -anchor w
+	grid $args.type_l $args.type_f -sticky new
+
+	grid columnconfigure $args 1 -weight 1
+
+	trace add variable @local_path write [cb _update_clone]
+	trace add variable @origin_url write [cb _update_clone]
+	bind $w_body.h <Destroy> "
+		[list trace remove variable @local_path write [cb _update_clone]]
+		[list trace remove variable @origin_url write [cb _update_clone]]
+	"
+	update
+	focus $args.origin_t
+}
+
+method _open_origin {} {
+	if {$origin_url ne {} && [file isdirectory $origin_url]} {
+		set p $origin_url
+	} else {
+		set p [pwd]
+	}
+
+	set p [tk_chooseDirectory \
+		-initialdir $p \
+		-parent $top \
+		-title [mc "Git Repository"] \
+		-mustexist true]
+	if {$p eq {}} return
+
+	set p [file normalize $p]
+	if {![_is_git [file join $p .git]] && ![_is_git $p]} {
+		error_popup [mc "Not a Git repository: %s" [file tail $p]]
+		return
+	}
+	set origin_url $p
+}
+
+method _update_clone {args} {
+	if {$local_path ne {} && $origin_url ne {}} {
+		$w_next conf -state normal
+	} else {
+		$w_next conf -state disabled
+	}
+
+	if {$origin_url ne {} &&
+		(  [_is_git [file join $origin_url .git]]
+		|| [_is_git $origin_url])} {
+		set e normal
+		if {[[lindex $w_types 0] cget -state] eq {disabled}} {
+			set clone_type hardlink
+		}
+	} else {
+		set e disabled
+		set clone_type full
+	}
+
+	foreach r $w_types {
+		$r conf -state $e
+	}
+}
+
+method _do_clone2 {} {
+	if {[file isdirectory $origin_url]} {
+		set origin_url [file normalize $origin_url]
+	}
+
+	if {$clone_type eq {hardlink} && ![file isdirectory $origin_url]} {
+		error_popup [mc "Standard only available for local repository."]
+		return
+	}
+	if {$clone_type eq {shared} && ![file isdirectory $origin_url]} {
+		error_popup [mc "Shared only available for local repository."]
+		return
+	}
+
+	if {$clone_type eq {hardlink} || $clone_type eq {shared}} {
+		set objdir [_objdir $origin_url]
+		if {$objdir eq {}} {
+			error_popup [mc "Not a Git repository: %s" [file tail $origin_url]]
+			return
+		}
+	}
+
+	set giturl $origin_url
+	if {[is_Cygwin] && [file isdirectory $giturl]} {
+		set giturl [exec cygpath --unix --absolute $giturl]
+		if {$clone_type eq {shared}} {
+			set objdir [exec cygpath --unix --absolute $objdir]
+		}
+	}
+
+	if {[file exists $local_path]} {
+		error_popup [mc "Location %s already exists." $local_path]
+		return
+	}
+
+	if {![_git_init $this]} return
+	set local_path [pwd]
+
+	if {[catch {
+			git config remote.$origin_name.url $giturl
+			git config remote.$origin_name.fetch +refs/heads/*:refs/remotes/$origin_name/*
+		} err]} {
+		error_popup [strcat [mc "Failed to configure origin"] "\n\n$err"]
+		return
+	}
+
+	destroy $w_body $w_next
+
+	switch -exact -- $clone_type {
+	hardlink {
+		set o_cons [status_bar::two_line $w_body]
+		pack $w_body -fill x -padx 10 -pady 10
+
+		$o_cons start \
+			[mc "Counting objects"] \
+			[mc "buckets"]
+		update
+
+		if {[file exists [file join $objdir info alternates]]} {
+			set pwd [pwd]
+			if {[catch {
+				file mkdir [gitdir objects info]
+				set f_in [open [file join $objdir info alternates] r]
+				set f_cp [open [gitdir objects info alternates] w]
+				fconfigure $f_in -translation binary -encoding binary
+				fconfigure $f_cp -translation binary -encoding binary
+				cd $objdir
+				while {[gets $f_in line] >= 0} {
+					if {[is_Cygwin]} {
+						puts $f_cp [exec cygpath --unix --absolute $line]
+					} else {
+						puts $f_cp [file normalize $line]
+					}
+				}
+				close $f_in
+				close $f_cp
+				cd $pwd
+			} err]} {
+				catch {cd $pwd}
+				_clone_failed $this [mc "Unable to copy objects/info/alternates: %s" $err]
+				return
+			}
+		}
+
+		set tolink  [list]
+		set buckets [glob \
+			-tails \
+			-nocomplain \
+			-directory [file join $objdir] ??]
+		set bcnt [expr {[llength $buckets] + 2}]
+		set bcur 1
+		$o_cons update $bcur $bcnt
+		update
+
+		file mkdir [file join .git objects pack]
+		foreach i [glob -tails -nocomplain \
+			-directory [file join $objdir pack] *] {
+			lappend tolink [file join pack $i]
+		}
+		$o_cons update [incr bcur] $bcnt
+		update
+
+		foreach i $buckets {
+			file mkdir [file join .git objects $i]
+			foreach j [glob -tails -nocomplain \
+				-directory [file join $objdir $i] *] {
+				lappend tolink [file join $i $j]
+			}
+			$o_cons update [incr bcur] $bcnt
+			update
+		}
+		$o_cons stop
+
+		if {$tolink eq {}} {
+			info_popup [strcat \
+				[mc "Nothing to clone from %s." $origin_url] \
+				"\n" \
+				[mc "The 'master' branch has not been initialized."] \
+				]
+			destroy $w_body
+			set done 1
+			return
+		}
+
+		set i [lindex $tolink 0]
+		if {[catch {
+				file link -hard \
+					[file join .git objects $i] \
+					[file join $objdir $i]
+			} err]} {
+			info_popup [mc "Hardlinks are unavailable.  Falling back to copying."]
+			set i [_copy_files $this $objdir $tolink]
+		} else {
+			set i [_link_files $this $objdir [lrange $tolink 1 end]]
+		}
+		if {!$i} return
+
+		destroy $w_body
+	}
+	full {
+		set o_cons [console::embed \
+			$w_body \
+			[mc "Cloning from %s" $origin_url]]
+		pack $w_body -fill both -expand 1 -padx 10
+		$o_cons exec \
+			[list git fetch --no-tags -k $origin_name] \
+			[cb _do_clone_tags]
+	}
+	shared {
+		set fd [open [gitdir objects info alternates] w]
+		fconfigure $fd -translation binary
+		puts $fd $objdir
+		close $fd
+	}
+	}
+
+	if {$clone_type eq {hardlink} || $clone_type eq {shared}} {
+		if {![_clone_refs $this]} return
+		set pwd [pwd]
+		if {[catch {
+				cd $origin_url
+				set HEAD [git rev-parse --verify HEAD^0]
+			} err]} {
+			_clone_failed $this [mc "Not a Git repository: %s" [file tail $origin_url]]
+			return 0
+		}
+		cd $pwd
+		_do_clone_checkout $this $HEAD
+	}
+}
+
+method _copy_files {objdir tocopy} {
+	$o_cons start \
+		[mc "Copying objects"] \
+		[mc "KiB"]
+	set tot 0
+	set cmp 0
+	foreach p $tocopy {
+		incr tot [file size [file join $objdir $p]]
+	}
+	foreach p $tocopy {
+		if {[catch {
+				set f_in [open [file join $objdir $p] r]
+				set f_cp [open [file join .git objects $p] w]
+				fconfigure $f_in -translation binary -encoding binary
+				fconfigure $f_cp -translation binary -encoding binary
+
+				while {![eof $f_in]} {
+					incr cmp [fcopy $f_in $f_cp -size 16384]
+					$o_cons update \
+						[expr {$cmp / 1024}] \
+						[expr {$tot / 1024}]
+					update
+				}
+
+				close $f_in
+				close $f_cp
+			} err]} {
+			_clone_failed $this [mc "Unable to copy object: %s" $err]
+			return 0
+		}
+	}
+	return 1
+}
+
+method _link_files {objdir tolink} {
+	set total [llength $tolink]
+	$o_cons start \
+		[mc "Linking objects"] \
+		[mc "objects"]
+	for {set i 0} {$i < $total} {} {
+		set p [lindex $tolink $i]
+		if {[catch {
+				file link -hard \
+					[file join .git objects $p] \
+					[file join $objdir $p]
+			} err]} {
+			_clone_failed $this [mc "Unable to hardlink object: %s" $err]
+			return 0
+		}
+
+		incr i
+		if {$i % 5 == 0} {
+			$o_cons update $i $total
+			update
+		}
+	}
+	return 1
+}
+
+method _clone_refs {} {
+	set pwd [pwd]
+	if {[catch {cd $origin_url} err]} {
+		error_popup [mc "Not a Git repository: %s" [file tail $origin_url]]
+		return 0
+	}
+	set fd_in [git_read for-each-ref \
+		--tcl \
+		{--format=list %(refname) %(objectname) %(*objectname)}]
+	cd $pwd
+
+	set fd [open [gitdir packed-refs] w]
+	fconfigure $fd -translation binary
+	puts $fd "# pack-refs with: peeled"
+	while {[gets $fd_in line] >= 0} {
+		set line [eval $line]
+		set refn [lindex $line 0]
+		set robj [lindex $line 1]
+		set tobj [lindex $line 2]
+
+		if {[regsub ^refs/heads/ $refn \
+			"refs/remotes/$origin_name/" refn]} {
+			puts $fd "$robj $refn"
+		} elseif {[string match refs/tags/* $refn]} {
+			puts $fd "$robj $refn"
+			if {$tobj ne {}} {
+				puts $fd "^$tobj"
+			}
+		}
+	}
+	close $fd_in
+	close $fd
+	return 1
+}
+
+method _do_clone_tags {ok} {
+	if {$ok} {
+		$o_cons exec \
+			[list git fetch --tags -k $origin_name] \
+			[cb _do_clone_HEAD]
+	} else {
+		$o_cons done $ok
+		_clone_failed $this [mc "Cannot fetch branches and objects.  See console output for details."]
+	}
+}
+
+method _do_clone_HEAD {ok} {
+	if {$ok} {
+		$o_cons exec \
+			[list git fetch $origin_name HEAD] \
+			[cb _do_clone_full_end]
+	} else {
+		$o_cons done $ok
+		_clone_failed $this [mc "Cannot fetch tags.  See console output for details."]
+	}
+}
+
+method _do_clone_full_end {ok} {
+	$o_cons done $ok
+
+	if {$ok} {
+		destroy $w_body
+
+		set HEAD {}
+		if {[file exists [gitdir FETCH_HEAD]]} {
+			set fd [open [gitdir FETCH_HEAD] r]
+			while {[gets $fd line] >= 0} {
+				if {[regexp "^(.{40})\t\t" $line line HEAD]} {
+					break
+				}
+			}
+			close $fd
+		}
+
+		catch {git pack-refs}
+		_do_clone_checkout $this $HEAD
+	} else {
+		_clone_failed $this [mc "Cannot determine HEAD.  See console output for details."]
+	}
+}
+
+method _clone_failed {{why {}}} {
+	if {[catch {file delete -force $local_path} err]} {
+		set why [strcat \
+			$why \
+			"\n\n" \
+			[mc "Unable to cleanup %s" $local_path] \
+			"\n\n" \
+			$err]
+	}
+	if {$why ne {}} {
+		update
+		error_popup [strcat [mc "Clone failed."] "\n" $why]
+	}
+}
+
+method _do_clone_checkout {HEAD} {
+	if {$HEAD eq {}} {
+		info_popup [strcat \
+			[mc "No default branch obtained."] \
+			"\n" \
+			[mc "The 'master' branch has not been initialized."] \
+			]
+		set done 1
+		return
+	}
+	if {[catch {
+			git update-ref HEAD $HEAD^0
+		} err]} {
+		info_popup [strcat \
+			[mc "Cannot resolve %s as a commit." $HEAD^0] \
+			"\n  $err" \
+			"\n" \
+			[mc "The 'master' branch has not been initialized."] \
+			]
+		set done 1
+		return
+	}
+
+	set o_cons [status_bar::two_line $w_body]
+	pack $w_body -fill x -padx 10 -pady 10
+	$o_cons start \
+		[mc "Creating working directory"] \
+		[mc "files"]
+
+	set readtree_err {}
+	set fd [git_read --stderr read-tree \
+		-m \
+		-u \
+		-v \
+		HEAD \
+		HEAD \
+		]
+	fconfigure $fd -blocking 0 -translation binary
+	fileevent $fd readable [cb _readtree_wait $fd]
+}
+
+method _do_validate_submodule_cloning {ok} {
+	if {$ok} {
+		$o_cons done $ok
+		set done 1
+	} else {
+		_clone_failed $this [mc "Cannot clone submodules."]
+	}
+}
+
+method _do_clone_submodules {} {
+	if {$recursive eq {true}} {
+		destroy $w_body
+		set o_cons [console::embed \
+			$w_body \
+			[mc "Cloning submodules"]]
+		pack $w_body -fill both -expand 1 -padx 10
+		$o_cons exec \
+			[list git submodule update --init --recursive] \
+			[cb _do_validate_submodule_cloning]
+	} else {
+		set done 1
+	}
+}
+
+method _readtree_wait {fd} {
+	set buf [read $fd]
+	$o_cons update_meter $buf
+	append readtree_err $buf
+
+	fconfigure $fd -blocking 1
+	if {![eof $fd]} {
+		fconfigure $fd -blocking 0
+		return
+	}
+
+	if {[catch {close $fd}]} {
+		set err $readtree_err
+		regsub {^fatal: } $err {} err
+		error_popup [strcat \
+			[mc "Initial file checkout failed."] \
+			"\n\n$err"]
+		return
+	}
+
+	# -- Run the post-checkout hook.
+	#
+	set fd_ph [githook_read post-checkout [string repeat 0 40] \
+		[git rev-parse HEAD] 1]
+	if {$fd_ph ne {}} {
+		global pch_error
+		set pch_error {}
+		fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
+		fileevent $fd_ph readable [cb _postcheckout_wait $fd_ph]
+	} else {
+		_do_clone_submodules $this
+	}
+}
+
+method _postcheckout_wait {fd_ph} {
+	global pch_error
+
+	append pch_error [read $fd_ph]
+	fconfigure $fd_ph -blocking 1
+	if {[eof $fd_ph]} {
+		if {[catch {close $fd_ph}]} {
+			hook_failed_popup post-checkout $pch_error 0
+		}
+		unset pch_error
+		_do_clone_submodules $this
+		return
+	}
+	fconfigure $fd_ph -blocking 0
+}
+
+######################################################################
+##
+## Open Existing Repository
+
+method _do_open {} {
+	global NS
+	$w_next conf \
+		-state disabled \
+		-command [cb _do_open2] \
+		-text [mc "Open"]
+
+	${NS}::frame $w_body
+	${NS}::label $w_body.h \
+		-font font_uibold -anchor center \
+		-text [mc "Open Existing Repository"]
+	pack $w_body.h -side top -fill x -pady 10
+	pack $w_body -fill x -padx 10
+
+	${NS}::frame $w_body.where
+	${NS}::label $w_body.where.l -text [mc "Repository:"]
+	${NS}::entry $w_body.where.t \
+		-textvariable @local_path \
+		-width 50
+	${NS}::button $w_body.where.b \
+		-text [mc "Browse"] \
+		-command [cb _open_local_path]
+
+	grid $w_body.where.l $w_body.where.t $w_body.where.b -sticky ew
+	pack $w_body.where -fill x
+
+	grid columnconfigure $w_body.where 1 -weight 1
+
+	trace add variable @local_path write [cb _write_local_path]
+	bind $w_body.h <Destroy> [list trace remove variable @local_path write [cb _write_local_path]]
+	update
+	focus $w_body.where.t
+}
+
+method _open_local_path {} {
+	if {$local_path ne {}} {
+		set p $local_path
+	} else {
+		set p [pwd]
+	}
+
+	set p [tk_chooseDirectory \
+		-initialdir $p \
+		-parent $top \
+		-title [mc "Git Repository"] \
+		-mustexist true]
+	if {$p eq {}} return
+
+	set p [file normalize $p]
+	if {![_is_git [file join $p .git]]} {
+		error_popup [mc "Not a Git repository: %s" [file tail $p]]
+		return
+	}
+	set local_path $p
+}
+
+method _do_open2 {} {
+	if {![_is_git [file join $local_path .git] actualgit]} {
+		error_popup [mc "Not a Git repository: %s" [file tail $local_path]]
+		return
+	}
+
+	if {[catch {cd $local_path} err]} {
+		error_popup [strcat \
+			[mc "Failed to open repository %s:" $local_path] \
+			"\n\n$err"]
+		return
+	}
+
+	_append_recentrepos [pwd]
+	set ::_gitdir $actualgit
+	set ::_prefix {}
+	set done 1
+}
+
+}