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+# git-gui branch (create/delete) support
+# Copyright (C) 2006, 2007 Shawn Pearce
+
+proc load_all_heads {} {
+ global all_heads
+
+ set all_heads [list]
+ set fd [open "| git for-each-ref --format=%(refname) refs/heads" r]
+ while {[gets $fd line] > 0} {
+ if {[is_tracking_branch $line]} continue
+ if {![regsub ^refs/heads/ $line {} name]} continue
+ lappend all_heads $name
+ }
+ close $fd
+
+ set all_heads [lsort $all_heads]
+}
+
+proc load_all_tags {} {
+ set all_tags [list]
+ set fd [open "| git for-each-ref --format=%(refname) refs/tags" r]
+ while {[gets $fd line] > 0} {
+ if {![regsub ^refs/tags/ $line {} name]} continue
+ lappend all_tags $name
+ }
+ close $fd
+
+ return [lsort $all_tags]
+}
+
+proc populate_branch_menu {} {
+ global all_heads disable_on_lock
+
+ set m .mbar.branch
+ set last [$m index last]
+ for {set i 0} {$i <= $last} {incr i} {
+ if {[$m type $i] eq {separator}} {
+ $m delete $i last
+ set new_dol [list]
+ foreach a $disable_on_lock {
+ if {[lindex $a 0] ne $m || [lindex $a 2] < $i} {
+ lappend new_dol $a
+ }
+ }
+ set disable_on_lock $new_dol
+ break
+ }
+ }
+
+ if {$all_heads ne {}} {
+ $m add separator
+ }
+ foreach b $all_heads {
+ $m add radiobutton \
+ -label $b \
+ -command [list switch_branch $b] \
+ -variable current_branch \
+ -value $b
+ lappend disable_on_lock \
+ [list $m entryconf [$m index last] -state]
+ }
+}
+
+proc do_create_branch_action {w} {
+ global all_heads null_sha1 repo_config
+ global create_branch_checkout create_branch_revtype
+ global create_branch_head create_branch_trackinghead
+ global create_branch_name create_branch_revexp
+ global create_branch_tag
+
+ set newbranch $create_branch_name
+ if {$newbranch eq {}
+ || $newbranch eq $repo_config(gui.newbranchtemplate)} {
+ tk_messageBox \
+ -icon error \
+ -type ok \
+ -title [wm title $w] \
+ -parent $w \
+ -message "Please supply a branch name."
+ focus $w.desc.name_t
+ return
+ }
+ if {![catch {git show-ref --verify -- "refs/heads/$newbranch"}]} {
+ tk_messageBox \
+ -icon error \
+ -type ok \
+ -title [wm title $w] \
+ -parent $w \
+ -message "Branch '$newbranch' already exists."
+ focus $w.desc.name_t
+ return
+ }
+ if {[catch {git check-ref-format "heads/$newbranch"}]} {
+ tk_messageBox \
+ -icon error \
+ -type ok \
+ -title [wm title $w] \
+ -parent $w \
+ -message "We do not like '$newbranch' as a branch name."
+ focus $w.desc.name_t
+ return
+ }
+
+ set rev {}
+ switch -- $create_branch_revtype {
+ head {set rev $create_branch_head}
+ tracking {set rev $create_branch_trackinghead}
+ tag {set rev $create_branch_tag}
+ expression {set rev $create_branch_revexp}
+ }
+ if {[catch {set cmt [git rev-parse --verify "${rev}^0"]}]} {
+ tk_messageBox \
+ -icon error \
+ -type ok \
+ -title [wm title $w] \
+ -parent $w \
+ -message "Invalid starting revision: $rev"
+ return
+ }
+ if {[catch {
+ git update-ref \
+ -m "branch: Created from $rev" \
+ "refs/heads/$newbranch" \
+ $cmt \
+ $null_sha1
+ } err]} {
+ tk_messageBox \
+ -icon error \
+ -type ok \
+ -title [wm title $w] \
+ -parent $w \
+ -message "Failed to create '$newbranch'.\n\n$err"
+ return
+ }
+
+ lappend all_heads $newbranch
+ set all_heads [lsort $all_heads]
+ populate_branch_menu
+ destroy $w
+ if {$create_branch_checkout} {
+ switch_branch $newbranch
+ }
+}
+
+proc radio_selector {varname value args} {
+ upvar #0 $varname var
+ set var $value
+}
+
+trace add variable create_branch_head write \
+ [list radio_selector create_branch_revtype head]
+trace add variable create_branch_trackinghead write \
+ [list radio_selector create_branch_revtype tracking]
+trace add variable create_branch_tag write \
+ [list radio_selector create_branch_revtype tag]
+
+trace add variable delete_branch_head write \
+ [list radio_selector delete_branch_checktype head]
+trace add variable delete_branch_trackinghead write \
+ [list radio_selector delete_branch_checktype tracking]
+
+proc do_create_branch {} {
+ global all_heads current_branch repo_config
+ global create_branch_checkout create_branch_revtype
+ global create_branch_head create_branch_trackinghead
+ global create_branch_name create_branch_revexp
+ global create_branch_tag
+
+ set w .branch_editor
+ toplevel $w
+ wm geometry $w "+[winfo rootx .]+[winfo rooty .]"
+
+ label $w.header -text {Create New Branch} \
+ -font font_uibold
+ pack $w.header -side top -fill x
+
+ frame $w.buttons
+ button $w.buttons.create -text Create \
+ -default active \
+ -command [list do_create_branch_action $w]
+ pack $w.buttons.create -side right
+ button $w.buttons.cancel -text {Cancel} \
+ -command [list destroy $w]
+ pack $w.buttons.cancel -side right -padx 5
+ pack $w.buttons -side bottom -fill x -pady 10 -padx 10
+
+ labelframe $w.desc -text {Branch Description}
+ label $w.desc.name_l -text {Name:}
+ entry $w.desc.name_t \
+ -borderwidth 1 \
+ -relief sunken \
+ -width 40 \
+ -textvariable create_branch_name \
+ -validate key \
+ -validatecommand {
+ if {%d == 1 && [regexp {[~^:?*\[\0- ]} %S]} {return 0}
+ return 1
+ }
+ grid $w.desc.name_l $w.desc.name_t -sticky we -padx {0 5}
+ grid columnconfigure $w.desc 1 -weight 1
+ pack $w.desc -anchor nw -fill x -pady 5 -padx 5
+
+ labelframe $w.from -text {Starting Revision}
+ radiobutton $w.from.head_r \
+ -text {Local Branch:} \
+ -value head \
+ -variable create_branch_revtype
+ eval tk_optionMenu $w.from.head_m create_branch_head $all_heads
+ grid $w.from.head_r $w.from.head_m -sticky w
+ set all_trackings [all_tracking_branches]
+ if {$all_trackings ne {}} {
+ set create_branch_trackinghead [lindex $all_trackings 0]
+ radiobutton $w.from.tracking_r \
+ -text {Tracking Branch:} \
+ -value tracking \
+ -variable create_branch_revtype
+ eval tk_optionMenu $w.from.tracking_m \
+ create_branch_trackinghead \
+ $all_trackings
+ grid $w.from.tracking_r $w.from.tracking_m -sticky w
+ }
+ set all_tags [load_all_tags]
+ if {$all_tags ne {}} {
+ set create_branch_tag [lindex $all_tags 0]
+ radiobutton $w.from.tag_r \
+ -text {Tag:} \
+ -value tag \
+ -variable create_branch_revtype
+ eval tk_optionMenu $w.from.tag_m create_branch_tag $all_tags
+ grid $w.from.tag_r $w.from.tag_m -sticky w
+ }
+ radiobutton $w.from.exp_r \
+ -text {Revision Expression:} \
+ -value expression \
+ -variable create_branch_revtype
+ entry $w.from.exp_t \
+ -borderwidth 1 \
+ -relief sunken \
+ -width 50 \
+ -textvariable create_branch_revexp \
+ -validate key \
+ -validatecommand {
+ if {%d == 1 && [regexp {\s} %S]} {return 0}
+ if {%d == 1 && [string length %S] > 0} {
+ set create_branch_revtype expression
+ }
+ return 1
+ }
+ grid $w.from.exp_r $w.from.exp_t -sticky we -padx {0 5}
+ grid columnconfigure $w.from 1 -weight 1
+ pack $w.from -anchor nw -fill x -pady 5 -padx 5
+
+ labelframe $w.postActions -text {Post Creation Actions}
+ checkbutton $w.postActions.checkout \
+ -text {Checkout after creation} \
+ -variable create_branch_checkout
+ pack $w.postActions.checkout -anchor nw
+ pack $w.postActions -anchor nw -fill x -pady 5 -padx 5
+
+ set create_branch_checkout 1
+ set create_branch_head $current_branch
+ set create_branch_revtype head
+ set create_branch_name $repo_config(gui.newbranchtemplate)
+ set create_branch_revexp {}
+
+ bind $w <Visibility> "
+ grab $w
+ $w.desc.name_t icursor end
+ focus $w.desc.name_t
+ "
+ bind $w <Key-Escape> "destroy $w"
+ bind $w <Key-Return> "do_create_branch_action $w;break"
+ wm title $w "[appname] ([reponame]): Create Branch"
+ tkwait window $w
+}
+
+proc do_delete_branch_action {w} {
+ global all_heads
+ global delete_branch_checktype delete_branch_head delete_branch_trackinghead
+
+ set check_rev {}
+ switch -- $delete_branch_checktype {
+ head {set check_rev $delete_branch_head}
+ tracking {set check_rev $delete_branch_trackinghead}
+ always {set check_rev {:none}}
+ }
+ if {$check_rev eq {:none}} {
+ set check_cmt {}
+ } elseif {[catch {set check_cmt [git rev-parse --verify "${check_rev}^0"]}]} {
+ tk_messageBox \
+ -icon error \
+ -type ok \
+ -title [wm title $w] \
+ -parent $w \
+ -message "Invalid check revision: $check_rev"
+ return
+ }
+
+ set to_delete [list]
+ set not_merged [list]
+ foreach i [$w.list.l curselection] {
+ set b [$w.list.l get $i]
+ if {[catch {set o [git rev-parse --verify $b]}]} continue
+ if {$check_cmt ne {}} {
+ if {$b eq $check_rev} continue
+ if {[catch {set m [git merge-base $o $check_cmt]}]} continue
+ if {$o ne $m} {
+ lappend not_merged $b
+ continue
+ }
+ }
+ lappend to_delete [list $b $o]
+ }
+ if {$not_merged ne {}} {
+ set msg "The following branches are not completely merged into $check_rev:
+
+ - [join $not_merged "\n - "]"
+ tk_messageBox \
+ -icon info \
+ -type ok \
+ -title [wm title $w] \
+ -parent $w \
+ -message $msg
+ }
+ if {$to_delete eq {}} return
+ if {$delete_branch_checktype eq {always}} {
+ set msg {Recovering deleted branches is difficult.
+
+Delete the selected branches?}
+ if {[tk_messageBox \
+ -icon warning \
+ -type yesno \
+ -title [wm title $w] \
+ -parent $w \
+ -message $msg] ne yes} {
+ return
+ }
+ }
+
+ set failed {}
+ foreach i $to_delete {
+ set b [lindex $i 0]
+ set o [lindex $i 1]
+ if {[catch {git update-ref -d "refs/heads/$b" $o} err]} {
+ append failed " - $b: $err\n"
+ } else {
+ set x [lsearch -sorted -exact $all_heads $b]
+ if {$x >= 0} {
+ set all_heads [lreplace $all_heads $x $x]
+ }
+ }
+ }
+
+ if {$failed ne {}} {
+ tk_messageBox \
+ -icon error \
+ -type ok \
+ -title [wm title $w] \
+ -parent $w \
+ -message "Failed to delete branches:\n$failed"
+ }
+
+ set all_heads [lsort $all_heads]
+ populate_branch_menu
+ destroy $w
+}
+
+proc do_delete_branch {} {
+ global all_heads tracking_branches current_branch
+ global delete_branch_checktype delete_branch_head delete_branch_trackinghead
+
+ set w .branch_editor
+ toplevel $w
+ wm geometry $w "+[winfo rootx .]+[winfo rooty .]"
+
+ label $w.header -text {Delete Local Branch} \
+ -font font_uibold
+ pack $w.header -side top -fill x
+
+ frame $w.buttons
+ button $w.buttons.create -text Delete \
+ -command [list do_delete_branch_action $w]
+ pack $w.buttons.create -side right
+ button $w.buttons.cancel -text {Cancel} \
+ -command [list destroy $w]
+ pack $w.buttons.cancel -side right -padx 5
+ pack $w.buttons -side bottom -fill x -pady 10 -padx 10
+
+ labelframe $w.list -text {Local Branches}
+ listbox $w.list.l \
+ -height 10 \
+ -width 70 \
+ -selectmode extended \
+ -yscrollcommand [list $w.list.sby set]
+ foreach h $all_heads {
+ if {$h ne $current_branch} {
+ $w.list.l insert end $h
+ }
+ }
+ scrollbar $w.list.sby -command [list $w.list.l yview]
+ pack $w.list.sby -side right -fill y
+ pack $w.list.l -side left -fill both -expand 1
+ pack $w.list -fill both -expand 1 -pady 5 -padx 5
+
+ labelframe $w.validate -text {Delete Only If}
+ radiobutton $w.validate.head_r \
+ -text {Merged Into Local Branch:} \
+ -value head \
+ -variable delete_branch_checktype
+ eval tk_optionMenu $w.validate.head_m delete_branch_head $all_heads
+ grid $w.validate.head_r $w.validate.head_m -sticky w
+ set all_trackings [all_tracking_branches]
+ if {$all_trackings ne {}} {
+ set delete_branch_trackinghead [lindex $all_trackings 0]
+ radiobutton $w.validate.tracking_r \
+ -text {Merged Into Tracking Branch:} \
+ -value tracking \
+ -variable delete_branch_checktype
+ eval tk_optionMenu $w.validate.tracking_m \
+ delete_branch_trackinghead \
+ $all_trackings
+ grid $w.validate.tracking_r $w.validate.tracking_m -sticky w
+ }
+ radiobutton $w.validate.always_r \
+ -text {Always (Do not perform merge checks)} \
+ -value always \
+ -variable delete_branch_checktype
+ grid $w.validate.always_r -columnspan 2 -sticky w
+ grid columnconfigure $w.validate 1 -weight 1
+ pack $w.validate -anchor nw -fill x -pady 5 -padx 5
+
+ set delete_branch_head $current_branch
+ set delete_branch_checktype head
+
+ bind $w <Visibility> "grab $w; focus $w"
+ bind $w <Key-Escape> "destroy $w"
+ wm title $w "[appname] ([reponame]): Delete Branch"
+ tkwait window $w
+}
+
+proc switch_branch {new_branch} {
+ global HEAD commit_type current_branch repo_config
+
+ if {![lock_index switch]} return
+
+ # -- Our in memory state should match the repository.
+ #
+ repository_state curType curHEAD curMERGE_HEAD
+ if {[string match amend* $commit_type]
+ && $curType eq {normal}
+ && $curHEAD eq $HEAD} {
+ } elseif {$commit_type ne $curType || $HEAD ne $curHEAD} {
+ info_popup {Last scanned state does not match repository state.
+
+Another Git program has modified this repository since the last scan. A rescan must be performed before the current branch can be changed.
+
+The rescan will be automatically started now.
+}
+ unlock_index
+ rescan {set ui_status_value {Ready.}}
+ return
+ }
+
+ # -- Don't do a pointless switch.
+ #
+ if {$current_branch eq $new_branch} {
+ unlock_index
+ return
+ }
+
+ if {$repo_config(gui.trustmtime) eq {true}} {
+ switch_branch_stage2 {} $new_branch
+ } else {
+ set ui_status_value {Refreshing file status...}
+ set cmd [list git update-index]
+ lappend cmd -q
+ lappend cmd --unmerged
+ lappend cmd --ignore-missing
+ lappend cmd --refresh
+ set fd_rf [open "| $cmd" r]
+ fconfigure $fd_rf -blocking 0 -translation binary
+ fileevent $fd_rf readable \
+ [list switch_branch_stage2 $fd_rf $new_branch]
+ }
+}
+
+proc switch_branch_stage2 {fd_rf new_branch} {
+ global ui_status_value HEAD
+
+ if {$fd_rf ne {}} {
+ read $fd_rf
+ if {![eof $fd_rf]} return
+ close $fd_rf
+ }
+
+ set ui_status_value "Updating working directory to '$new_branch'..."
+ set cmd [list git read-tree]
+ lappend cmd -m
+ lappend cmd -u
+ lappend cmd --exclude-per-directory=.gitignore
+ lappend cmd $HEAD
+ lappend cmd $new_branch
+ set fd_rt [open "| $cmd" r]
+ fconfigure $fd_rt -blocking 0 -translation binary
+ fileevent $fd_rt readable \
+ [list switch_branch_readtree_wait $fd_rt $new_branch]
+}
+
+proc switch_branch_readtree_wait {fd_rt new_branch} {
+ global selected_commit_type commit_type HEAD MERGE_HEAD PARENT
+ global current_branch
+ global ui_comm ui_status_value
+
+ # -- We never get interesting output on stdout; only stderr.
+ #
+ read $fd_rt
+ fconfigure $fd_rt -blocking 1
+ if {![eof $fd_rt]} {
+ fconfigure $fd_rt -blocking 0
+ return
+ }
+
+ # -- The working directory wasn't in sync with the index and
+ # we'd have to overwrite something to make the switch. A
+ # merge is required.
+ #
+ if {[catch {close $fd_rt} err]} {
+ regsub {^fatal: } $err {} err
+ warn_popup "File level merge required.
+
+$err
+
+Staying on branch '$current_branch'."
+ set ui_status_value "Aborted checkout of '$new_branch' (file level merging is required)."
+ unlock_index
+ return
+ }
+
+ # -- Update the symbolic ref. Core git doesn't even check for failure
+ # here, it Just Works(tm). If it doesn't we are in some really ugly
+ # state that is difficult to recover from within git-gui.
+ #
+ if {[catch {git symbolic-ref HEAD "refs/heads/$new_branch"} err]} {
+ error_popup "Failed to set current branch.
+
+This working directory is only partially switched. We successfully updated your files, but failed to update an internal Git file.
+
+This should not have occurred. [appname] will now close and give up.
+
+$err"
+ do_quit
+ return
+ }
+
+ # -- Update our repository state. If we were previously in amend mode
+ # we need to toss the current buffer and do a full rescan to update
+ # our file lists. If we weren't in amend mode our file lists are
+ # accurate and we can avoid the rescan.
+ #
+ unlock_index
+ set selected_commit_type new
+ if {[string match amend* $commit_type]} {
+ $ui_comm delete 0.0 end
+ $ui_comm edit reset
+ $ui_comm edit modified false
+ rescan {set ui_status_value "Checked out branch '$current_branch'."}
+ } else {
+ repository_state commit_type HEAD MERGE_HEAD
+ set PARENT $HEAD
+ set ui_status_value "Checked out branch '$current_branch'."
+ }
+}