Merge git-gui 0.14.0
[git/git.git] / git-gui / lib / mergetool.tcl
1 # git-gui merge conflict resolution
2 # parts based on git-mergetool (c) 2006 Theodore Y. Ts'o
3
4 proc merge_resolve_one {stage} {
5 global current_diff_path
6
7 switch -- $stage {
8 1 { set targetquestion [mc "Force resolution to the base version?"] }
9 2 { set targetquestion [mc "Force resolution to this branch?"] }
10 3 { set targetquestion [mc "Force resolution to the other branch?"] }
11 }
12
13 set op_question [strcat $targetquestion "\n" \
14 [mc "Note that the diff shows only conflicting changes.
15
16 %s will be overwritten.
17
18 This operation can be undone only by restarting the merge." \
19 [short_path $current_diff_path]]]
20
21 if {[ask_popup $op_question] eq {yes}} {
22 merge_load_stages $current_diff_path [list merge_force_stage $stage]
23 }
24 }
25
26 proc merge_stage_workdir {path {lno {}}} {
27 global current_diff_path diff_active
28 global current_diff_side ui_workdir
29
30 if {$diff_active} return
31
32 if {$path ne $current_diff_path || $ui_workdir ne $current_diff_side} {
33 show_diff $path $ui_workdir $lno {} [list do_merge_stage_workdir $path]
34 } else {
35 do_merge_stage_workdir $path
36 }
37 }
38
39 proc do_merge_stage_workdir {path} {
40 global current_diff_path is_conflict_diff
41
42 if {$path ne $current_diff_path} return;
43
44 if {$is_conflict_diff} {
45 if {[ask_popup [mc "File %s seems to have unresolved conflicts, still stage?" \
46 [short_path $path]]] ne {yes}} {
47 return
48 }
49 }
50
51 merge_add_resolution $path
52 }
53
54 proc merge_add_resolution {path} {
55 global current_diff_path ui_workdir
56
57 set after [next_diff_after_action $ui_workdir $path {} {^_?U}]
58
59 update_index \
60 [mc "Adding resolution for %s" [short_path $path]] \
61 [list $path] \
62 [concat $after [list ui_ready]]
63 }
64
65 proc merge_force_stage {stage} {
66 global current_diff_path merge_stages
67
68 if {$merge_stages($stage) ne {}} {
69 git checkout-index -f --stage=$stage -- $current_diff_path
70 } else {
71 file delete -- $current_diff_path
72 }
73
74 merge_add_resolution $current_diff_path
75 }
76
77 proc merge_load_stages {path cont} {
78 global merge_stages_fd merge_stages merge_stages_buf
79
80 if {[info exists merge_stages_fd]} {
81 catch { kill_file_process $merge_stages_fd }
82 catch { close $merge_stages_fd }
83 }
84
85 set merge_stages(0) {}
86 set merge_stages(1) {}
87 set merge_stages(2) {}
88 set merge_stages(3) {}
89 set merge_stages_buf {}
90
91 set merge_stages_fd [eval git_read ls-files -u -z -- {$path}]
92
93 fconfigure $merge_stages_fd -blocking 0 -translation binary -encoding binary
94 fileevent $merge_stages_fd readable [list read_merge_stages $merge_stages_fd $cont]
95 }
96
97 proc read_merge_stages {fd cont} {
98 global merge_stages_buf merge_stages_fd merge_stages
99
100 append merge_stages_buf [read $fd]
101 set pck [split $merge_stages_buf "\0"]
102 set merge_stages_buf [lindex $pck end]
103
104 if {[eof $fd] && $merge_stages_buf ne {}} {
105 lappend pck {}
106 set merge_stages_buf {}
107 }
108
109 foreach p [lrange $pck 0 end-1] {
110 set fcols [split $p "\t"]
111 set cols [split [lindex $fcols 0] " "]
112 set stage [lindex $cols 2]
113
114 set merge_stages($stage) [lrange $cols 0 1]
115 }
116
117 if {[eof $fd]} {
118 close $fd
119 unset merge_stages_fd
120 eval $cont
121 }
122 }
123
124 proc merge_resolve_tool {} {
125 global current_diff_path
126
127 merge_load_stages $current_diff_path [list merge_resolve_tool2]
128 }
129
130 proc merge_resolve_tool2 {} {
131 global current_diff_path merge_stages
132
133 # Validate the stages
134 if {$merge_stages(2) eq {} ||
135 [lindex $merge_stages(2) 0] eq {120000} ||
136 [lindex $merge_stages(2) 0] eq {160000} ||
137 $merge_stages(3) eq {} ||
138 [lindex $merge_stages(3) 0] eq {120000} ||
139 [lindex $merge_stages(3) 0] eq {160000}
140 } {
141 error_popup [mc "Cannot resolve deletion or link conflicts using a tool"]
142 return
143 }
144
145 if {![file exists $current_diff_path]} {
146 error_popup [mc "Conflict file does not exist"]
147 return
148 }
149
150 # Determine the tool to use
151 set tool [get_config merge.tool]
152 if {$tool eq {}} { set tool meld }
153
154 set merge_tool_path [get_config "mergetool.$tool.path"]
155 if {$merge_tool_path eq {}} {
156 switch -- $tool {
157 emerge { set merge_tool_path "emacs" }
158 araxis { set merge_tool_path "compare" }
159 default { set merge_tool_path $tool }
160 }
161 }
162
163 # Make file names
164 set filebase [file rootname $current_diff_path]
165 set fileext [file extension $current_diff_path]
166 set basename [lindex [file split $current_diff_path] end]
167
168 set MERGED $current_diff_path
169 set BASE "./$MERGED.BASE$fileext"
170 set LOCAL "./$MERGED.LOCAL$fileext"
171 set REMOTE "./$MERGED.REMOTE$fileext"
172 set BACKUP "./$MERGED.BACKUP$fileext"
173
174 set base_stage $merge_stages(1)
175
176 # Build the command line
177 switch -- $tool {
178 araxis {
179 if {$base_stage ne {}} {
180 set cmdline [list "$merge_tool_path" -wait -merge -3 -a1 \
181 -title1:"'$MERGED (Base)'" -title2:"'$MERGED (Local)'" \
182 -title3:"'$MERGED (Remote)'" \
183 "$BASE" "$LOCAL" "$REMOTE" "$MERGED"]
184 } else {
185 set cmdline [list "$merge_tool_path" -wait -2 \
186 -title1:"'$MERGED (Local)'" -title2:"'$MERGED (Remote)'" \
187 "$LOCAL" "$REMOTE" "$MERGED"]
188 }
189 }
190 bc3 {
191 if {$base_stage ne {}} {
192 set cmdline [list "$merge_tool_path" "$LOCAL" "$REMOTE" "$BASE" -mergeoutput="$MERGED"]
193 } else {
194 set cmdline [list "$merge_tool_path" "$LOCAL" "$REMOTE" -mergeoutput="$MERGED"]
195 }
196 }
197 ecmerge {
198 if {$base_stage ne {}} {
199 set cmdline [list "$merge_tool_path" "$BASE" "$LOCAL" "$REMOTE" --default --mode=merge3 --to="$MERGED"]
200 } else {
201 set cmdline [list "$merge_tool_path" "$LOCAL" "$REMOTE" --default --mode=merge2 --to="$MERGED"]
202 }
203 }
204 emerge {
205 if {$base_stage ne {}} {
206 set cmdline [list "$merge_tool_path" -f emerge-files-with-ancestor-command \
207 "$LOCAL" "$REMOTE" "$BASE" "$basename"]
208 } else {
209 set cmdline [list "$merge_tool_path" -f emerge-files-command \
210 "$LOCAL" "$REMOTE" "$basename"]
211 }
212 }
213 gvimdiff {
214 set cmdline [list "$merge_tool_path" -f "$LOCAL" "$MERGED" "$REMOTE"]
215 }
216 kdiff3 {
217 if {$base_stage ne {}} {
218 set cmdline [list "$merge_tool_path" --auto --L1 "$MERGED (Base)" \
219 --L2 "$MERGED (Local)" --L3 "$MERGED (Remote)" -o "$MERGED" "$BASE" "$LOCAL" "$REMOTE"]
220 } else {
221 set cmdline [list "$merge_tool_path" --auto --L1 "$MERGED (Local)" \
222 --L2 "$MERGED (Remote)" -o "$MERGED" "$LOCAL" "$REMOTE"]
223 }
224 }
225 meld {
226 set cmdline [list "$merge_tool_path" "$LOCAL" "$MERGED" "$REMOTE"]
227 }
228 opendiff {
229 if {$base_stage ne {}} {
230 set cmdline [list "$merge_tool_path" "$LOCAL" "$REMOTE" -ancestor "$BASE" -merge "$MERGED"]
231 } else {
232 set cmdline [list "$merge_tool_path" "$LOCAL" "$REMOTE" -merge "$MERGED"]
233 }
234 }
235 p4merge {
236 set cmdline [list "$merge_tool_path" "$BASE" "$REMOTE" "$LOCAL" "$MERGED"]
237 }
238 tkdiff {
239 if {$base_stage ne {}} {
240 set cmdline [list "$merge_tool_path" -a "$BASE" -o "$MERGED" "$LOCAL" "$REMOTE"]
241 } else {
242 set cmdline [list "$merge_tool_path" -o "$MERGED" "$LOCAL" "$REMOTE"]
243 }
244 }
245 vimdiff {
246 error_popup [mc "Not a GUI merge tool: '%s'" $tool]
247 return
248 }
249 winmerge {
250 if {$base_stage ne {}} {
251 # This tool does not support 3-way merges.
252 # Use the 'conflict file' resolution feature instead.
253 set cmdline [list "$merge_tool_path" -e -ub "$MERGED"]
254 } else {
255 set cmdline [list "$merge_tool_path" -e -ub -wl \
256 -dl "Theirs File" -dr "Mine File" "$REMOTE" "$LOCAL" "$MERGED"]
257 }
258 }
259 xxdiff {
260 if {$base_stage ne {}} {
261 set cmdline [list "$merge_tool_path" -X --show-merged-pane \
262 -R {Accel.SaveAsMerged: "Ctrl-S"} \
263 -R {Accel.Search: "Ctrl+F"} \
264 -R {Accel.SearchForward: "Ctrl-G"} \
265 --merged-file "$MERGED" "$LOCAL" "$BASE" "$REMOTE"]
266 } else {
267 set cmdline [list "$merge_tool_path" -X --show-merged-pane \
268 -R {Accel.SaveAsMerged: "Ctrl-S"} \
269 -R {Accel.Search: "Ctrl+F"} \
270 -R {Accel.SearchForward: "Ctrl-G"} \
271 --merged-file "$MERGED" "$LOCAL" "$REMOTE"]
272 }
273 }
274 default {
275 error_popup [mc "Unsupported merge tool '%s'" $tool]
276 return
277 }
278 }
279
280 merge_tool_start $cmdline $MERGED $BACKUP [list $BASE $LOCAL $REMOTE]
281 }
282
283 proc delete_temp_files {files} {
284 foreach fname $files {
285 file delete $fname
286 }
287 }
288
289 proc merge_tool_get_stages {target stages} {
290 global merge_stages
291
292 set i 1
293 foreach fname $stages {
294 if {$merge_stages($i) eq {}} {
295 file delete $fname
296 catch { close [open $fname w] }
297 } else {
298 # A hack to support autocrlf properly
299 git checkout-index -f --stage=$i -- $target
300 file rename -force -- $target $fname
301 }
302 incr i
303 }
304 }
305
306 proc merge_tool_start {cmdline target backup stages} {
307 global merge_stages mtool_target mtool_tmpfiles mtool_fd mtool_mtime
308
309 if {[info exists mtool_fd]} {
310 if {[ask_popup [mc "Merge tool is already running, terminate it?"]] eq {yes}} {
311 catch { kill_file_process $mtool_fd }
312 catch { close $mtool_fd }
313 unset mtool_fd
314
315 set old_backup [lindex $mtool_tmpfiles end]
316 file rename -force -- $old_backup $mtool_target
317 delete_temp_files $mtool_tmpfiles
318 } else {
319 return
320 }
321 }
322
323 # Save the original file
324 file rename -force -- $target $backup
325
326 # Get the blobs; it destroys $target
327 if {[catch {merge_tool_get_stages $target $stages} err]} {
328 file rename -force -- $backup $target
329 delete_temp_files $stages
330 error_popup [mc "Error retrieving versions:\n%s" $err]
331 return
332 }
333
334 # Restore the conflict file
335 file copy -force -- $backup $target
336
337 # Initialize global state
338 set mtool_target $target
339 set mtool_mtime [file mtime $target]
340 set mtool_tmpfiles $stages
341
342 lappend mtool_tmpfiles $backup
343
344 # Force redirection to avoid interpreting output on stderr
345 # as an error, and launch the tool
346 lappend cmdline {2>@1}
347
348 if {[catch { set mtool_fd [_open_stdout_stderr $cmdline] } err]} {
349 delete_temp_files $mtool_tmpfiles
350 error_popup [mc "Could not start the merge tool:\n\n%s" $err]
351 return
352 }
353
354 ui_status [mc "Running merge tool..."]
355
356 fconfigure $mtool_fd -blocking 0 -translation binary -encoding binary
357 fileevent $mtool_fd readable [list read_mtool_output $mtool_fd]
358 }
359
360 proc read_mtool_output {fd} {
361 global mtool_fd mtool_tmpfiles
362
363 read $fd
364 if {[eof $fd]} {
365 unset mtool_fd
366
367 fconfigure $fd -blocking 1
368 merge_tool_finish $fd
369 }
370 }
371
372 proc merge_tool_finish {fd} {
373 global mtool_tmpfiles mtool_target mtool_mtime
374
375 set backup [lindex $mtool_tmpfiles end]
376 set failed 0
377
378 # Check the return code
379 if {[catch {close $fd} err]} {
380 set failed 1
381 if {$err ne {child process exited abnormally}} {
382 error_popup [strcat [mc "Merge tool failed."] "\n\n$err"]
383 }
384 }
385
386 # Finish
387 if {$failed} {
388 file rename -force -- $backup $mtool_target
389 delete_temp_files $mtool_tmpfiles
390 ui_status [mc "Merge tool failed."]
391 } else {
392 if {[is_config_true mergetool.keepbackup]} {
393 file rename -force -- $backup "$mtool_target.orig"
394 }
395
396 delete_temp_files $mtool_tmpfiles
397
398 reshow_diff
399 }
400 }