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authorJunio C Hamano <gitster@pobox.com>2007-07-12 21:14:51 (GMT)
committerJunio C Hamano <gitster@pobox.com>2007-07-12 21:14:51 (GMT)
commitb9dcf846e20ed5287e239c9a0942c5d150081bab (patch)
treed6a6ae6c6240ac014f47c32e9ecf09b0c50c2dab /git-gui/lib/checkout_op.tcl
parent237ce836e770e8ead12a14ee4a8170009fa4a40b (diff)
parentb215883de9322b8b475a04b4768d6ba5455373d1 (diff)
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Merge commit 'git-gui/master'
* commit 'git-gui/master': (36 commits) git-gui: Change prior tree SHA-1 verification to use git_read git-gui: Include a space in Cygwin shortcut command lines git-gui: Use sh.exe in Cygwin shortcuts git-gui: Paper bag fix for Cygwin shortcut creation git-gui: Improve the Windows and Mac OS X shortcut creators git-gui: Teach console widget to use git_read git-gui: Perform our own magic shbang detection on Windows git-gui: Treat `git version` as `git --version` git-gui: Assume unfound commands are known by git wrapper git-gui: Correct gitk installation location git-gui: Always use absolute path to all git executables git-gui: Show a progress meter for checking out files git-gui: Change the main window progress bar to use status_bar git-gui: Extract blame viewer status bar into mega-widget git-gui: Allow double-click in checkout dialog to start checkout git-gui: Default selection to first matching ref git-gui: Unabbreviate commit SHA-1s prior to display git-gui: Refactor branch switch to support detached head git-gui: Refactor our ui_status_value update technique git-gui: Better handling of detached HEAD ...
Diffstat (limited to 'git-gui/lib/checkout_op.tcl')
-rw-r--r--git-gui/lib/checkout_op.tcl579
1 files changed, 579 insertions, 0 deletions
diff --git a/git-gui/lib/checkout_op.tcl b/git-gui/lib/checkout_op.tcl
new file mode 100644
index 0000000..00a994b
--- /dev/null
+++ b/git-gui/lib/checkout_op.tcl
@@ -0,0 +1,579 @@
+# git-gui commit checkout support
+# Copyright (C) 2007 Shawn Pearce
+
+class checkout_op {
+
+field w {}; # our window (if we have one)
+field w_cons {}; # embedded console window object
+
+field new_expr ; # expression the user saw/thinks this is
+field new_hash ; # commit SHA-1 we are switching to
+field new_ref ; # ref we are updating/creating
+
+field parent_w .; # window that started us
+field merge_type none; # type of merge to apply to existing branch
+field fetch_spec {}; # refetch tracking branch if used?
+field checkout 1; # actually checkout the branch?
+field create 0; # create the branch if it doesn't exist?
+
+field reset_ok 0; # did the user agree to reset?
+field fetch_ok 0; # did the fetch succeed?
+
+field readtree_d {}; # buffered output from read-tree
+field update_old {}; # was the update-ref call deferred?
+field reflog_msg {}; # log message for the update-ref call
+
+constructor new {expr hash {ref {}}} {
+ set new_expr $expr
+ set new_hash $hash
+ set new_ref $ref
+
+ return $this
+}
+
+method parent {path} {
+ set parent_w [winfo toplevel $path]
+}
+
+method enable_merge {type} {
+ set merge_type $type
+}
+
+method enable_fetch {spec} {
+ set fetch_spec $spec
+}
+
+method enable_checkout {co} {
+ set checkout $co
+}
+
+method enable_create {co} {
+ set create $co
+}
+
+method run {} {
+ if {$fetch_spec ne {}} {
+ global M1B
+
+ # We were asked to refresh a single tracking branch
+ # before we get to work. We should do that before we
+ # consider any ref updating.
+ #
+ set fetch_ok 0
+ set l_trck [lindex $fetch_spec 0]
+ set remote [lindex $fetch_spec 1]
+ set r_head [lindex $fetch_spec 2]
+ regsub ^refs/heads/ $r_head {} r_name
+
+ _toplevel $this {Refreshing Tracking Branch}
+ set w_cons [::console::embed \
+ $w.console \
+ "Fetching $r_name from $remote"]
+ pack $w.console -fill both -expand 1
+ $w_cons exec \
+ [list git fetch $remote +$r_head:$l_trck] \
+ [cb _finish_fetch]
+
+ bind $w <$M1B-Key-w> break
+ bind $w <$M1B-Key-W> break
+ bind $w <Visibility> "
+ [list grab $w]
+ [list focus $w]
+ "
+ wm protocol $w WM_DELETE_WINDOW [cb _noop]
+ tkwait window $w
+
+ if {!$fetch_ok} {
+ delete_this
+ return 0
+ }
+ }
+
+ if {$new_ref ne {}} {
+ # If we have a ref we need to update it before we can
+ # proceed with a checkout (if one was enabled).
+ #
+ if {![_update_ref $this]} {
+ delete_this
+ return 0
+ }
+ }
+
+ if {$checkout} {
+ _checkout $this
+ return 1
+ }
+
+ delete_this
+ return 1
+}
+
+method _noop {} {}
+
+method _finish_fetch {ok} {
+ if {$ok} {
+ set l_trck [lindex $fetch_spec 0]
+ if {[catch {set new_hash [git rev-parse --verify "$l_trck^0"]} err]} {
+ set ok 0
+ $w_cons insert "fatal: Cannot resolve $l_trck"
+ $w_cons insert $err
+ }
+ }
+
+ $w_cons done $ok
+ set w_cons {}
+ wm protocol $w WM_DELETE_WINDOW {}
+
+ if {$ok} {
+ destroy $w
+ set w {}
+ } else {
+ button $w.close -text Close -command [list destroy $w]
+ pack $w.close -side bottom -anchor e -padx 10 -pady 10
+ }
+
+ set fetch_ok $ok
+}
+
+method _update_ref {} {
+ global null_sha1 current_branch
+
+ set ref $new_ref
+ set new $new_hash
+
+ set is_current 0
+ set rh refs/heads/
+ set rn [string length $rh]
+ if {[string equal -length $rn $rh $ref]} {
+ set newbranch [string range $ref $rn end]
+ if {$current_branch eq $newbranch} {
+ set is_current 1
+ }
+ } else {
+ set newbranch $ref
+ }
+
+ if {[catch {set cur [git rev-parse --verify "$ref^0"]}]} {
+ # Assume it does not exist, and that is what the error was.
+ #
+ if {!$create} {
+ _error $this "Branch '$newbranch' does not exist."
+ return 0
+ }
+
+ set reflog_msg "branch: Created from $new_expr"
+ set cur $null_sha1
+ } elseif {$create && $merge_type eq {none}} {
+ # We were told to create it, but not do a merge.
+ # Bad. Name shouldn't have existed.
+ #
+ _error $this "Branch '$newbranch' already exists."
+ return 0
+ } elseif {!$create && $merge_type eq {none}} {
+ # We aren't creating, it exists and we don't merge.
+ # We are probably just a simple branch switch.
+ # Use whatever value we just read.
+ #
+ set new $cur
+ set new_hash $cur
+ } elseif {$new eq $cur} {
+ # No merge would be required, don't compute anything.
+ #
+ } else {
+ set mrb {}
+ catch {set mrb [git merge-base $new $cur]}
+ switch -- $merge_type {
+ ff {
+ if {$mrb eq $new} {
+ # The current branch is actually newer.
+ #
+ set new $cur
+ } elseif {$mrb eq $cur} {
+ # The current branch is older.
+ #
+ set reflog_msg "merge $new_expr: Fast-forward"
+ } else {
+ _error $this "Branch '$newbranch' already exists.\n\nIt cannot fast-forward to $new_expr.\nA merge is required."
+ return 0
+ }
+ }
+ reset {
+ if {$mrb eq $cur} {
+ # The current branch is older.
+ #
+ set reflog_msg "merge $new_expr: Fast-forward"
+ } else {
+ # The current branch will lose things.
+ #
+ if {[_confirm_reset $this $cur]} {
+ set reflog_msg "reset $new_expr"
+ } else {
+ return 0
+ }
+ }
+ }
+ default {
+ _error $this "Only 'ff' and 'reset' merge is currently supported."
+ return 0
+ }
+ }
+ }
+
+ if {$new ne $cur} {
+ if {$is_current} {
+ # No so fast. We should defer this in case
+ # we cannot update the working directory.
+ #
+ set update_old $cur
+ return 1
+ }
+
+ if {[catch {
+ git update-ref -m $reflog_msg $ref $new $cur
+ } err]} {
+ _error $this "Failed to update '$newbranch'.\n\n$err"
+ return 0
+ }
+ }
+
+ return 1
+}
+
+method _checkout {} {
+ if {[lock_index checkout_op]} {
+ after idle [cb _start_checkout]
+ } else {
+ _error $this "Index is already locked."
+ delete_this
+ }
+}
+
+method _start_checkout {} {
+ global HEAD commit_type
+
+ # -- 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 ui_ready
+ delete_this
+ return
+ }
+
+ if {[is_config_true gui.trustmtime]} {
+ _readtree $this
+ } else {
+ ui_status {Refreshing file status...}
+ set fd [git_read update-index \
+ -q \
+ --unmerged \
+ --ignore-missing \
+ --refresh \
+ ]
+ fconfigure $fd -blocking 0 -translation binary
+ fileevent $fd readable [cb _refresh_wait $fd]
+ }
+}
+
+method _refresh_wait {fd} {
+ read $fd
+ if {[eof $fd]} {
+ close $fd
+ _readtree $this
+ }
+}
+
+method _name {} {
+ if {$new_ref eq {}} {
+ return [string range $new_hash 0 7]
+ }
+
+ set rh refs/heads/
+ set rn [string length $rh]
+ if {[string equal -length $rn $rh $new_ref]} {
+ return [string range $new_ref $rn end]
+ } else {
+ return $new_ref
+ }
+}
+
+method _readtree {} {
+ global HEAD
+
+ set readtree_d {}
+ $::main_status start \
+ "Updating working directory to '[_name $this]'..." \
+ {files checked out}
+
+ set fd [git_read --stderr read-tree \
+ -m \
+ -u \
+ -v \
+ --exclude-per-directory=.gitignore \
+ $HEAD \
+ $new_hash \
+ ]
+ fconfigure $fd -blocking 0 -translation binary
+ fileevent $fd readable [cb _readtree_wait $fd]
+}
+
+method _readtree_wait {fd} {
+ global current_branch
+
+ set buf [read $fd]
+ $::main_status update_meter $buf
+ append readtree_d $buf
+
+ fconfigure $fd -blocking 1
+ if {![eof $fd]} {
+ fconfigure $fd -blocking 0
+ return
+ }
+
+ if {[catch {close $fd}]} {
+ set err $readtree_d
+ regsub {^fatal: } $err {} err
+ $::main_status stop "Aborted checkout of '[_name $this]' (file level merging is required)."
+ warn_popup "File level merge required.
+
+$err
+
+Staying on branch '$current_branch'."
+ unlock_index
+ delete_this
+ return
+ }
+
+ $::main_status stop
+ _after_readtree $this
+}
+
+method _after_readtree {} {
+ global selected_commit_type commit_type HEAD MERGE_HEAD PARENT
+ global current_branch is_detached
+ global ui_comm
+
+ set name [_name $this]
+ set log "checkout: moving"
+ if {!$is_detached} {
+ append log " from $current_branch"
+ }
+
+ # -- Move/create HEAD as a symbolic ref. Core git does not
+ # 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.
+ #
+ set rh refs/heads/
+ set rn [string length $rh]
+ if {[string equal -length $rn $rh $new_ref]} {
+ set new_branch [string range $new_ref $rn end]
+ append log " to $new_branch"
+
+ if {[catch {
+ git symbolic-ref -m $log HEAD $new_ref
+ } err]} {
+ _fatal $this $err
+ }
+ set current_branch $new_branch
+ set is_detached 0
+ } else {
+ append log " to $new_expr"
+
+ if {[catch {
+ _detach_HEAD $log $new_hash
+ } err]} {
+ _fatal $this $err
+ }
+ set current_branch HEAD
+ set is_detached 1
+ }
+
+ # -- We had to defer updating the branch itself until we
+ # knew the working directory would update. So now we
+ # need to finish that work. If it fails we're in big
+ # trouble.
+ #
+ if {$update_old ne {}} {
+ if {[catch {
+ git update-ref \
+ -m $reflog_msg \
+ $new_ref \
+ $new_hash \
+ $update_old
+ } err]} {
+ _fatal $this $err
+ }
+ }
+
+ if {$is_detached} {
+ info_popup "You are no longer on a local branch.
+
+If you wanted to be on a branch, create one now starting from 'This Detached Checkout'."
+ }
+
+ # -- 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
+ $ui_comm edit modified false
+ rescan [list ui_status "Checked out '$name'."]
+ } else {
+ repository_state commit_type HEAD MERGE_HEAD
+ set PARENT $HEAD
+ ui_status "Checked out '$name'."
+ }
+ delete_this
+}
+
+git-version proc _detach_HEAD {log new} {
+ >= 1.5.3 {
+ git update-ref --no-deref -m $log HEAD $new
+ }
+ default {
+ set p [gitdir HEAD]
+ file delete $p
+ set fd [open $p w]
+ fconfigure $fd -translation lf -encoding utf-8
+ puts $fd $new
+ close $fd
+ }
+}
+
+method _confirm_reset {cur} {
+ set reset_ok 0
+ set name [_name $this]
+ set gitk [list do_gitk [list $cur ^$new_hash]]
+
+ _toplevel $this {Confirm Branch Reset}
+ pack [label $w.msg1 \
+ -anchor w \
+ -justify left \
+ -text "Resetting '$name' to $new_expr will lose the following commits:" \
+ ] -anchor w
+
+ set list $w.list.l
+ frame $w.list
+ text $list \
+ -font font_diff \
+ -width 80 \
+ -height 10 \
+ -wrap none \
+ -xscrollcommand [list $w.list.sbx set] \
+ -yscrollcommand [list $w.list.sby set]
+ scrollbar $w.list.sbx -orient h -command [list $list xview]
+ scrollbar $w.list.sby -orient v -command [list $list yview]
+ pack $w.list.sbx -fill x -side bottom
+ pack $w.list.sby -fill y -side right
+ pack $list -fill both -expand 1
+ pack $w.list -fill both -expand 1 -padx 5 -pady 5
+
+ pack [label $w.msg2 \
+ -anchor w \
+ -justify left \
+ -text {Recovering lost commits may not be easy.} \
+ ]
+ pack [label $w.msg3 \
+ -anchor w \
+ -justify left \
+ -text "Reset '$name'?" \
+ ]
+
+ frame $w.buttons
+ button $w.buttons.visualize \
+ -text Visualize \
+ -command $gitk
+ pack $w.buttons.visualize -side left
+ button $w.buttons.reset \
+ -text Reset \
+ -command "
+ set @reset_ok 1
+ destroy $w
+ "
+ pack $w.buttons.reset -side right
+ button $w.buttons.cancel \
+ -default active \
+ -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
+
+ set fd [git_read rev-list --pretty=oneline $cur ^$new_hash]
+ while {[gets $fd line] > 0} {
+ set abbr [string range $line 0 7]
+ set subj [string range $line 41 end]
+ $list insert end "$abbr $subj\n"
+ }
+ close $fd
+ $list configure -state disabled
+
+ bind $w <Key-v> $gitk
+ bind $w <Visibility> "
+ grab $w
+ focus $w.buttons.cancel
+ "
+ bind $w <Key-Return> [list destroy $w]
+ bind $w <Key-Escape> [list destroy $w]
+ tkwait window $w
+ return $reset_ok
+}
+
+method _error {msg} {
+ if {[winfo ismapped $parent_w]} {
+ set p $parent_w
+ } else {
+ set p .
+ }
+
+ tk_messageBox \
+ -icon error \
+ -type ok \
+ -title [wm title $p] \
+ -parent $p \
+ -message $msg
+}
+
+method _toplevel {title} {
+ regsub -all {::} $this {__} w
+ set w .$w
+
+ if {[winfo ismapped $parent_w]} {
+ set p $parent_w
+ } else {
+ set p .
+ }
+
+ toplevel $w
+ wm title $w $title
+ wm geometry $w "+[winfo rootx $p]+[winfo rooty $p]"
+}
+
+method _fatal {err} {
+ error_popup "Failed to set current branch.
+
+This working directory is only partially switched. We successfully updated your files, but failed to update an internal Git file.
+
+This should not have occurred. [appname] will now close and give up.
+
+$err"
+ exit 1
+}
+
+}