1 # git-gui branch merge support
2 # Copyright (C) 2006, 2007 Shawn Pearce
4 namespace eval merge {
6 proc _can_merge {} {
7 global HEAD commit_type file_states
9 if {[string match amend* $commit_type]} {
10 info_popup {Cannot merge while amending.
12 You must finish amending this commit before starting any type of merge.
13 }
14 return 0
15 }
17 if {[committer_ident] eq {}} {return 0}
18 if {![lock_index merge]} {return 0}
20 # -- Our in memory state should match the repository.
21 #
22 repository_state curType curHEAD curMERGE_HEAD
23 if {$commit_type ne $curType || $HEAD ne $curHEAD} {
24 info_popup {Last scanned state does not match repository state.
26 Another Git program has modified this repository since the last scan. A rescan must be performed before a merge can be performed.
28 The rescan will be automatically started now.
29 }
30 unlock_index
31 rescan {set ui_status_value {Ready.}}
32 return 0
33 }
35 foreach path [array names file_states] {
36 switch -glob -- [lindex $file_states($path) 0] {
37 _O {
38 continue; # and pray it works!
39 }
40 U? {
41 error_popup "You are in the middle of a conflicted merge.
43 File [short_path $path] has merge conflicts.
45 You must resolve them, add the file, and commit to complete the current merge. Only then can you begin another merge.
46 "
47 unlock_index
48 return 0
49 }
50 ?? {
51 error_popup "You are in the middle of a change.
53 File [short_path $path] is modified.
55 You should complete the current commit before starting a merge. Doing so will help you abort a failed merge, should the need arise.
56 "
57 unlock_index
58 return 0
59 }
60 }
61 }
63 return 1
64 }
66 proc _refs {w list} {
67 set r {}
68 foreach i [$w.source.l curselection] {
69 lappend r [lindex [lindex $list $i] 0]
70 }
71 return $r
72 }
74 proc _visualize {w list} {
75 set revs [_refs $w $list]
76 if {$revs eq {}} return
77 lappend revs --not HEAD
78 do_gitk $revs
79 }
81 proc _start {w list} {
82 global HEAD ui_status_value current_branch
84 set cmd [list git merge]
85 set names [_refs $w $list]
86 set revcnt [llength $names]
87 append cmd { } $names
89 if {$revcnt == 0} {
90 return
91 } elseif {$revcnt == 1} {
92 set unit branch
93 } elseif {$revcnt <= 15} {
94 set unit branches
96 if {[tk_dialog \
97 $w.confirm_octopus \
98 [wm title $w] \
99 "Use octopus merge strategy?
101 You are merging $revcnt branches at once. This requires using the octopus merge driver, which may not succeed if there are file-level conflicts.
102 " \
103 question \
104 0 \
105 {Cancel} \
106 {Use octopus} \
107 ] != 1} return
108 } else {
109 tk_messageBox \
110 -icon error \
111 -type ok \
112 -title [wm title $w] \
113 -parent $w \
114 -message "Too many branches selected.
116 You have requested to merge $revcnt branches in an octopus merge. This exceeds Git's internal limit of 15 branches per merge.
118 Please select fewer branches. To merge more than 15 branches, merge the branches in batches.
119 "
120 return
121 }
123 set msg "Merging $current_branch, [join $names {, }]"
124 set ui_status_value "$msg..."
125 set cons [console::new "Merge" $msg]
126 console::exec $cons $cmd \
127 [namespace code [list _finish $revcnt $cons]]
129 wm protocol $w WM_DELETE_WINDOW {}
130 destroy $w
131 }
133 proc _finish {revcnt w ok} {
134 console::done $w $ok
135 if {$ok} {
136 set msg {Merge completed successfully.}
137 } else {
138 if {$revcnt != 1} {
139 info_popup "Octopus merge failed.
141 Your merge of $revcnt branches has failed.
143 There are file-level conflicts between the branches which must be resolved manually.
145 The working directory will now be reset.
147 You can attempt this merge again by merging only one branch at a time." $w
149 set fd [open "| git read-tree --reset -u HEAD" r]
150 fconfigure $fd -blocking 0 -translation binary
151 fileevent $fd readable \
152 [namespace code [list _reset_wait $fd]]
153 set ui_status_value {Aborting... please wait...}
154 return
155 }
157 set msg {Merge failed. Conflict resolution is required.}
158 }
159 unlock_index
160 rescan [list set ui_status_value $msg]
161 }
163 proc dialog {} {
164 global current_branch
165 global M1B
167 if {![_can_merge]} return
169 set fmt {list %(objectname) %(*objectname) %(refname) %(subject)}
170 set cmd [list git for-each-ref --tcl --format=$fmt]
171 lappend cmd refs/heads
172 lappend cmd refs/remotes
173 lappend cmd refs/tags
174 set fr_fd [open "| $cmd" r]
175 fconfigure $fr_fd -translation binary
176 while {[gets $fr_fd line] > 0} {
177 set line [eval $line]
178 set ref [lindex $line 2]
179 regsub ^refs/(heads|remotes|tags)/ $ref {} ref
180 set subj($ref) [lindex $line 3]
181 lappend sha1([lindex $line 0]) $ref
182 if {[lindex $line 1] ne {}} {
183 lappend sha1([lindex $line 1]) $ref
184 }
185 }
186 close $fr_fd
188 set to_show {}
189 set fr_fd [open "| git rev-list --all --not HEAD"]
190 while {[gets $fr_fd line] > 0} {
191 if {[catch {set ref $sha1($line)}]} continue
192 foreach n $ref {
193 lappend to_show [list $n $line]
194 }
195 }
196 close $fr_fd
197 set to_show [lsort -unique $to_show]
199 set w .merge_setup
200 toplevel $w
201 wm geometry $w "+[winfo rootx .]+[winfo rooty .]"
203 set _visualize [namespace code [list _visualize $w $to_show]]
204 set _start [namespace code [list _start $w $to_show]]
206 label $w.header \
207 -text "Merge Into $current_branch" \
208 -font font_uibold
209 pack $w.header -side top -fill x
211 frame $w.buttons
212 button $w.buttons.visualize -text Visualize -command $_visualize
213 pack $w.buttons.visualize -side left
214 button $w.buttons.create -text Merge -command $_start
215 pack $w.buttons.create -side right
216 button $w.buttons.cancel -text {Cancel} -command [list destroy $w]
217 pack $w.buttons.cancel -side right -padx 5
218 pack $w.buttons -side bottom -fill x -pady 10 -padx 10
220 labelframe $w.source -text {Source Branches}
221 listbox $w.source.l \
222 -height 10 \
223 -width 70 \
224 -font font_diff \
225 -selectmode extended \
226 -yscrollcommand [list $w.source.sby set]
227 scrollbar $w.source.sby -command [list $w.source.l yview]
228 pack $w.source.sby -side right -fill y
229 pack $w.source.l -side left -fill both -expand 1
230 pack $w.source -fill both -expand 1 -pady 5 -padx 5
232 foreach ref $to_show {
233 set n [lindex $ref 0]
234 if {[string length $n] > 20} {
235 set n "[string range $n 0 16]..."
236 }
237 $w.source.l insert end [format {%s %-20s %s} \
238 [string range [lindex $ref 1] 0 5] \
239 $n \
240 $subj([lindex $ref 0])]
241 }
243 bind $w.source.l <Key-K> [list event generate %W <Shift-Key-Up>]
244 bind $w.source.l <Key-J> [list event generate %W <Shift-Key-Down>]
245 bind $w.source.l <Key-k> [list event generate %W <Key-Up>]
246 bind $w.source.l <Key-j> [list event generate %W <Key-Down>]
247 bind $w.source.l <Key-h> [list event generate %W <Key-Left>]
248 bind $w.source.l <Key-l> [list event generate %W <Key-Right>]
249 bind $w.source.l <Key-v> $_visualize
251 bind $w <$M1B-Key-Return> $_start
252 bind $w <Visibility> "grab $w; focus $w.source.l"
253 bind $w <Key-Escape> "unlock_index;destroy $w"
254 wm protocol $w WM_DELETE_WINDOW "unlock_index;destroy $w"
255 wm title $w "[appname] ([reponame]): Merge"
256 tkwait window $w
257 }
259 proc reset_hard {} {
260 global HEAD commit_type file_states
262 if {[string match amend* $commit_type]} {
263 info_popup {Cannot abort while amending.
265 You must finish amending this commit.
266 }
267 return
268 }
270 if {![lock_index abort]} return
272 if {[string match *merge* $commit_type]} {
273 set op merge
274 } else {
275 set op commit
276 }
278 if {[ask_popup "Abort $op?
280 Aborting the current $op will cause *ALL* uncommitted changes to be lost.
282 Continue with aborting the current $op?"] eq {yes}} {
283 set fd [open "| git read-tree --reset -u HEAD" r]
284 fconfigure $fd -blocking 0 -translation binary
285 fileevent $fd readable [namespace code [list _reset_wait $fd]]
286 set ui_status_value {Aborting... please wait...}
287 } else {
288 unlock_index
289 }
290 }
292 proc _reset_wait {fd} {
293 global ui_comm
295 read $fd
296 if {[eof $fd]} {
297 close $fd
298 unlock_index
300 $ui_comm delete 0.0 end
301 $ui_comm edit modified false
303 catch {file delete [gitdir MERGE_HEAD]}
304 catch {file delete [gitdir rr-cache MERGE_RR]}
305 catch {file delete [gitdir SQUASH_MSG]}
306 catch {file delete [gitdir MERGE_MSG]}
307 catch {file delete [gitdir GITGUI_MSG]}
309 rescan {set ui_status_value {Abort completed. Ready.}}
310 }
311 }
313 }