1 # git-gui commit checkout support
2 # Copyright (C) 2007 Shawn Pearce
6 field w {}; # our window (if we have one)
7 field w_cons {}; # embedded console window object
9 field new_expr ; # expression the user saw/thinks this is
10 field new_hash ; # commit SHA-1 we are switching to
11 field new_ref ; # ref we are updating/creating
13 field parent_w .; # window that started us
14 field merge_type none; # type of merge to apply to existing branch
15 field merge_base {}; # merge base if we have another ref involved
16 field fetch_spec {}; # refetch tracking branch if used?
17 field checkout 1; # actually checkout the branch?
18 field create 0; # create the branch if it doesn't exist?
20 field reset_ok 0; # did the user agree to reset?
21 field fetch_ok 0; # did the fetch succeed?
23 field readtree_d {}; # buffered output from read-tree
24 field update_old {}; # was the update-ref call deferred?
25 field reflog_msg {}; # log message for the update-ref call
27 constructor new {expr hash {ref {}}} {
35 method parent {path} {
36 set parent_w [winfo toplevel $path]
39 method enable_merge {type} {
43 method enable_fetch {spec} {
47 method enable_checkout {co} {
51 method enable_create {co} {
56 if {$fetch_spec ne {}} {
59 # We were asked to refresh a single tracking branch
60 # before we get to work. We should do that before we
61 # consider any ref updating.
64 set l_trck [lindex $fetch_spec 0]
65 set remote [lindex $fetch_spec 1]
66 set r_head [lindex $fetch_spec 2]
67 regsub ^refs/heads/ $r_head {} r_name
69 set cmd [list git fetch $remote]
71 lappend cmd +$r_head:$l_trck
76 _toplevel $this {Refreshing Tracking Branch}
77 set w_cons [::console::embed \
79 [mc "Fetching %s from %s" $r_name $remote]]
80 pack $w.console -fill both -expand 1
81 $w_cons exec $cmd [cb _finish_fetch]
83 bind $w <$M1B-Key-w> break
84 bind $w <$M1B-Key-W> break
85 bind $w <Visibility> "
89 wm protocol $w WM_DELETE_WINDOW [cb _noop]
99 # If we have a ref we need to update it before we can
100 # proceed with a checkout (if one was enabled).
102 if {![_update_ref $this]} {
119 method _finish_fetch {ok} {
121 set l_trck [lindex $fetch_spec 0]
123 set l_trck FETCH_HEAD
125 if {[catch {set new_hash [git rev-parse --verify "$l_trck^0"]} err]} {
127 $w_cons insert [mc "fatal: Cannot resolve %s" $l_trck]
134 wm protocol $w WM_DELETE_WINDOW {}
140 button $w.close -text [mc Close] -command [list destroy $w]
141 pack $w.close -side bottom -anchor e -padx 10 -pady 10
147 method _update_ref {} {
148 global null_sha1 current_branch
155 set rn [string length $rh]
156 if {[string equal -length $rn $rh $ref]} {
157 set newbranch [string range $ref $rn end]
158 if {$current_branch eq $newbranch} {
165 if {[catch {set cur [git rev-parse --verify "$ref^0"]}]} {
166 # Assume it does not exist, and that is what the error was.
169 _error $this [mc "Branch '%s' does not exist." $newbranch]
173 set reflog_msg "branch: Created from $new_expr"
175 } elseif {$create && $merge_type eq {none}} {
176 # We were told to create it, but not do a merge.
177 # Bad. Name shouldn't have existed.
179 _error $this [mc "Branch '%s' already exists." $newbranch]
181 } elseif {!$create && $merge_type eq {none}} {
182 # We aren't creating, it exists and we don't merge.
183 # We are probably just a simple branch switch.
184 # Use whatever value we just read.
188 } elseif {$new eq $cur} {
189 # No merge would be required, don't compute anything.
192 catch {set merge_base [git merge-base $new $cur]}
193 if {$merge_base eq $cur} {
194 # The current branch is older.
196 set reflog_msg "merge $new_expr: Fast-forward"
198 switch -- $merge_type {
200 if {$merge_base eq $new} {
201 # The current branch is actually newer.
206 _error $this [mc "Branch '%s' already exists.\n\nIt cannot fast-forward to %s.\nA merge is required." $newbranch $new_expr]
211 # The current branch will lose things.
213 if {[_confirm_reset $this $cur]} {
214 set reflog_msg "reset $new_expr"
220 _error $this [mc "Merge strategy '%s' not supported." $merge_type]
229 # No so fast. We should defer this in case
230 # we cannot update the working directory.
237 git update-ref -m $reflog_msg $ref $new $cur
239 _error $this [strcat [mc "Failed to update '%s'." $newbranch] "\n\n$err"]
247 method _checkout {} {
248 if {[lock_index checkout_op]} {
249 after idle [cb _start_checkout]
251 _error $this [mc "Staging area (index) is already locked."]
256 method _start_checkout {} {
257 global HEAD commit_type
259 # -- Our in memory state should match the repository.
261 repository_state curType curHEAD curMERGE_HEAD
262 if {[string match amend* $commit_type]
263 && $curType eq {normal}
264 && $curHEAD eq $HEAD} {
265 } elseif {$commit_type ne $curType || $HEAD ne $curHEAD} {
266 info_popup [mc "Last scanned state does not match repository state.
268 Another Git program has modified this repository since the last scan. A rescan must be performed before the current branch can be changed.
270 The rescan will be automatically started now.
278 if {$curHEAD eq $new_hash} {
279 _after_readtree $this
280 } elseif {[is_config_true gui.trustmtime]} {
283 ui_status [mc "Refreshing file status..."]
284 set fd [git_read update-index \
290 fconfigure $fd -blocking 0 -translation binary
291 fileevent $fd readable [cb _refresh_wait $fd]
295 method _refresh_wait {fd} {
304 if {$new_ref eq {}} {
305 return [string range $new_hash 0 7]
309 set rn [string length $rh]
310 if {[string equal -length $rn $rh $new_ref]} {
311 return [string range $new_ref $rn end]
317 method _readtree {} {
321 $::main_status start \
322 [mc "Updating working directory to '%s'..." [_name $this]] \
323 [mc "files checked out"]
325 set fd [git_read --stderr read-tree \
329 --exclude-per-directory=.gitignore \
333 fconfigure $fd -blocking 0 -translation binary
334 fileevent $fd readable [cb _readtree_wait $fd]
337 method _readtree_wait {fd} {
338 global current_branch
341 $::main_status update_meter $buf
342 append readtree_d $buf
344 fconfigure $fd -blocking 1
346 fconfigure $fd -blocking 0
350 if {[catch {close $fd}]} {
352 regsub {^fatal: } $err {} err
353 $::main_status stop [mc "Aborted checkout of '%s' (file level merging is required)." [_name $this]]
354 warn_popup [strcat [mc "File level merge required."] "
358 " [mc "Staying on branch '%s'." $current_branch]]
365 _after_readtree $this
368 method _after_readtree {} {
369 global selected_commit_type commit_type HEAD MERGE_HEAD PARENT
370 global current_branch is_detached
373 set name [_name $this]
374 set log "checkout: moving"
376 append log " from $current_branch"
379 # -- Move/create HEAD as a symbolic ref. Core git does not
380 # even check for failure here, it Just Works(tm). If it
381 # doesn't we are in some really ugly state that is difficult
382 # to recover from within git-gui.
385 set rn [string length $rh]
386 if {[string equal -length $rn $rh $new_ref]} {
387 set new_branch [string range $new_ref $rn end]
388 if {$is_detached || $current_branch ne $new_branch} {
389 append log " to $new_branch"
391 git symbolic-ref -m $log HEAD $new_ref
395 set current_branch $new_branch
399 if {!$is_detached || $new_hash ne $HEAD} {
400 append log " to $new_expr"
402 _detach_HEAD $log $new_hash
407 set current_branch HEAD
411 # -- We had to defer updating the branch itself until we
412 # knew the working directory would update. So now we
413 # need to finish that work. If it fails we're in big
416 if {$update_old ne {}} {
429 info_popup [mc "You are no longer on a local branch.
431 If you wanted to be on a branch, create one now starting from 'This Detached Checkout'."]
434 # -- Update our repository state. If we were previously in
435 # amend mode we need to toss the current buffer and do a
436 # full rescan to update our file lists. If we weren't in
437 # amend mode our file lists are accurate and we can avoid
441 set selected_commit_type new
442 if {[string match amend* $commit_type]} {
443 $ui_comm delete 0.0 end
445 $ui_comm edit modified false
446 rescan [list ui_status [mc "Checked out '%s'." $name]]
448 repository_state commit_type HEAD MERGE_HEAD
450 ui_status [mc "Checked out '%s'." $name]
455 git-version proc _detach_HEAD {log new} {
457 git update-ref --no-deref -m $log HEAD $new
463 fconfigure $fd -translation lf -encoding utf-8
469 method _confirm_reset {cur} {
471 set name [_name $this]
472 set gitk [list do_gitk [list $cur ^$new_hash]]
474 _toplevel $this {Confirm Branch Reset}
475 pack [label $w.msg1 \
478 -text [mc "Resetting '%s' to '%s' will lose the following commits:" $name $new_expr]\
488 -xscrollcommand [list $w.list.sbx set] \
489 -yscrollcommand [list $w.list.sby set]
490 scrollbar $w.list.sbx -orient h -command [list $list xview]
491 scrollbar $w.list.sby -orient v -command [list $list yview]
492 pack $w.list.sbx -fill x -side bottom
493 pack $w.list.sby -fill y -side right
494 pack $list -fill both -expand 1
495 pack $w.list -fill both -expand 1 -padx 5 -pady 5
497 pack [label $w.msg2 \
500 -text [mc "Recovering lost commits may not be easy."] \
502 pack [label $w.msg3 \
505 -text [mc "Reset '%s'?" $name] \
509 button $w.buttons.visualize \
510 -text [mc Visualize] \
512 pack $w.buttons.visualize -side left
513 button $w.buttons.reset \
519 pack $w.buttons.reset -side right
520 button $w.buttons.cancel \
523 -command [list destroy $w]
524 pack $w.buttons.cancel -side right -padx 5
525 pack $w.buttons -side bottom -fill x -pady 10 -padx 10
527 set fd [git_read rev-list --pretty=oneline $cur ^$new_hash]
528 while {[gets $fd line] > 0} {
529 set abbr [string range $line 0 7]
530 set subj [string range $line 41 end]
531 $list insert end "$abbr $subj\n"
534 $list configure -state disabled
536 bind $w <Key-v> $gitk
537 bind $w <Visibility> "
539 focus $w.buttons.cancel
541 bind $w <Key-Return> [list destroy $w]
542 bind $w <Key-Escape> [list destroy $w]
547 method _error {msg} {
548 if {[winfo ismapped $parent_w]} {
557 -title [wm title $p] \
562 method _toplevel {title} {
563 regsub -all {::} $this {__} w
566 if {[winfo ismapped $parent_w]} {
574 wm geometry $w "+[winfo rootx $p]+[winfo rooty $p]"
577 method _fatal {err} {
578 error_popup [strcat [mc "Failed to set current branch.
580 This working directory is only partially switched. We successfully updated your files, but failed to update an internal Git file.
582 This should not have occurred. %s will now close and give up." [appname]] "