1 # git-gui misc. commit reading/writing support
2 # Copyright (C) 2006, 2007 Shawn Pearce
4 proc load_last_commit {} {
5 global HEAD PARENT MERGE_HEAD commit_type ui_comm
6 global repo_config
8 if {[llength $PARENT] == 0} {
9 error_popup [mc "There is nothing to amend.
11 You are about to create the initial commit. There is no commit before this to amend.
12 "]
13 return
14 }
16 repository_state curType curHEAD curMERGE_HEAD
17 if {$curType eq {merge}} {
18 error_popup [mc "Cannot amend while merging.
20 You are currently in the middle of a merge that has not been fully completed. You cannot amend the prior commit unless you first abort the current merge activity.
21 "]
22 return
23 }
25 set msg {}
26 set parents [list]
27 if {[catch {
28 set fd [git_read cat-file commit $curHEAD]
29 fconfigure $fd -encoding binary -translation lf
30 if {[catch {set enc $repo_config(i18n.commitencoding)}]} {
31 set enc utf-8
32 }
33 while {[gets $fd line] > 0} {
34 if {[string match {parent *} $line]} {
35 lappend parents [string range $line 7 end]
36 } elseif {[string match {encoding *} $line]} {
37 set enc [string tolower [string range $line 9 end]]
38 }
39 }
40 set msg [read $fd]
41 close $fd
43 set enc [tcl_encoding $enc]
44 if {$enc ne {}} {
45 set msg [encoding convertfrom $enc $msg]
46 }
47 set msg [string trim $msg]
48 } err]} {
49 error_popup [strcat [mc "Error loading commit data for amend:"] "\n\n$err"]
50 return
51 }
53 set HEAD $curHEAD
54 set PARENT $parents
55 set MERGE_HEAD [list]
56 switch -- [llength $parents] {
57 0 {set commit_type amend-initial}
58 1 {set commit_type amend}
59 default {set commit_type amend-merge}
60 }
62 $ui_comm delete 0.0 end
63 $ui_comm insert end $msg
64 $ui_comm edit reset
65 $ui_comm edit modified false
66 rescan ui_ready
67 }
69 set GIT_COMMITTER_IDENT {}
71 proc committer_ident {} {
72 global GIT_COMMITTER_IDENT
74 if {$GIT_COMMITTER_IDENT eq {}} {
75 if {[catch {set me [git var GIT_COMMITTER_IDENT]} err]} {
76 error_popup [strcat [mc "Unable to obtain your identity:"] "\n\n$err"]
77 return {}
78 }
79 if {![regexp {^(.*) [0-9]+ [-+0-9]+$} \
80 $me me GIT_COMMITTER_IDENT]} {
81 error_popup [strcat [mc "Invalid GIT_COMMITTER_IDENT:"] "\n\n$me"]
82 return {}
83 }
84 }
86 return $GIT_COMMITTER_IDENT
87 }
89 proc do_signoff {} {
90 global ui_comm
92 set me [committer_ident]
93 if {$me eq {}} return
95 set sob "Signed-off-by: $me"
96 set last [$ui_comm get {end -1c linestart} {end -1c}]
97 if {$last ne $sob} {
98 $ui_comm edit separator
99 if {$last ne {}
100 && ![regexp {^[A-Z][A-Za-z]*-[A-Za-z-]+: *} $last]} {
101 $ui_comm insert end "\n"
102 }
103 $ui_comm insert end "\n$sob"
104 $ui_comm edit separator
105 $ui_comm see end
106 }
107 }
109 proc create_new_commit {} {
110 global commit_type ui_comm
112 set commit_type normal
113 $ui_comm delete 0.0 end
114 $ui_comm edit reset
115 $ui_comm edit modified false
116 rescan ui_ready
117 }
119 proc commit_tree {} {
120 global HEAD commit_type file_states ui_comm repo_config
121 global pch_error
123 if {[committer_ident] eq {}} return
124 if {![lock_index update]} return
126 # -- Our in memory state should match the repository.
127 #
128 repository_state curType curHEAD curMERGE_HEAD
129 if {[string match amend* $commit_type]
130 && $curType eq {normal}
131 && $curHEAD eq $HEAD} {
132 } elseif {$commit_type ne $curType || $HEAD ne $curHEAD} {
133 info_popup [mc "Last scanned state does not match repository state.
135 Another Git program has modified this repository since the last scan. A rescan must be performed before another commit can be created.
137 The rescan will be automatically started now.
138 "]
139 unlock_index
140 rescan ui_ready
141 return
142 }
144 # -- At least one file should differ in the index.
145 #
146 set files_ready 0
147 foreach path [array names file_states] {
148 switch -glob -- [lindex $file_states($path) 0] {
149 _? {continue}
150 A? -
151 D? -
152 T_ -
153 M? {set files_ready 1}
154 _U -
155 U? {
156 error_popup [mc "Unmerged files cannot be committed.
158 File %s has merge conflicts. You must resolve them and stage the file before committing.
159 " [short_path $path]]
160 unlock_index
161 return
162 }
163 default {
164 error_popup [mc "Unknown file state %s detected.
166 File %s cannot be committed by this program.
167 " [lindex $s 0] [short_path $path]]
168 }
169 }
170 }
171 if {!$files_ready && ![string match *merge $curType] && ![is_enabled nocommit]} {
172 info_popup [mc "No changes to commit.
174 You must stage at least 1 file before you can commit.
175 "]
176 unlock_index
177 return
178 }
180 if {[is_enabled nocommitmsg]} { do_quit 0 }
182 # -- A message is required.
183 #
184 set msg [string trim [$ui_comm get 1.0 end]]
185 regsub -all -line {[ \t\r]+$} $msg {} msg
186 if {$msg eq {}} {
187 error_popup [mc "Please supply a commit message.
189 A good commit message has the following format:
191 - First line: Describe in one sentence what you did.
192 - Second line: Blank
193 - Remaining lines: Describe why this change is good.
194 "]
195 unlock_index
196 return
197 }
199 # -- Build the message file.
200 #
201 set msg_p [gitdir GITGUI_EDITMSG]
202 set msg_wt [open $msg_p w]
203 fconfigure $msg_wt -translation lf
204 if {[catch {set enc $repo_config(i18n.commitencoding)}]} {
205 set enc utf-8
206 }
207 set use_enc [tcl_encoding $enc]
208 if {$use_enc ne {}} {
209 fconfigure $msg_wt -encoding $use_enc
210 } else {
211 puts stderr [mc "warning: Tcl does not support encoding '%s'." $enc]
212 fconfigure $msg_wt -encoding utf-8
213 }
214 puts $msg_wt $msg
215 close $msg_wt
217 if {[is_enabled nocommit]} { do_quit 0 }
219 # -- Run the pre-commit hook.
220 #
221 set fd_ph [githook_read pre-commit]
222 if {$fd_ph eq {}} {
223 commit_commitmsg $curHEAD $msg_p
224 return
225 }
227 ui_status [mc "Calling pre-commit hook..."]
228 set pch_error {}
229 fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
230 fileevent $fd_ph readable \
231 [list commit_prehook_wait $fd_ph $curHEAD $msg_p]
232 }
234 proc commit_prehook_wait {fd_ph curHEAD msg_p} {
235 global pch_error
237 append pch_error [read $fd_ph]
238 fconfigure $fd_ph -blocking 1
239 if {[eof $fd_ph]} {
240 if {[catch {close $fd_ph}]} {
241 catch {file delete $msg_p}
242 ui_status [mc "Commit declined by pre-commit hook."]
243 hook_failed_popup pre-commit $pch_error
244 unlock_index
245 } else {
246 commit_commitmsg $curHEAD $msg_p
247 }
248 set pch_error {}
249 return
250 }
251 fconfigure $fd_ph -blocking 0
252 }
254 proc commit_commitmsg {curHEAD msg_p} {
255 global pch_error
257 # -- Run the commit-msg hook.
258 #
259 set fd_ph [githook_read commit-msg $msg_p]
260 if {$fd_ph eq {}} {
261 commit_writetree $curHEAD $msg_p
262 return
263 }
265 ui_status [mc "Calling commit-msg hook..."]
266 set pch_error {}
267 fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
268 fileevent $fd_ph readable \
269 [list commit_commitmsg_wait $fd_ph $curHEAD $msg_p]
270 }
272 proc commit_commitmsg_wait {fd_ph curHEAD msg_p} {
273 global pch_error
275 append pch_error [read $fd_ph]
276 fconfigure $fd_ph -blocking 1
277 if {[eof $fd_ph]} {
278 if {[catch {close $fd_ph}]} {
279 catch {file delete $msg_p}
280 ui_status [mc "Commit declined by commit-msg hook."]
281 hook_failed_popup commit-msg $pch_error
282 unlock_index
283 } else {
284 commit_writetree $curHEAD $msg_p
285 }
286 set pch_error {}
287 return
288 }
289 fconfigure $fd_ph -blocking 0
290 }
292 proc commit_writetree {curHEAD msg_p} {
293 ui_status [mc "Committing changes..."]
294 set fd_wt [git_read write-tree]
295 fileevent $fd_wt readable \
296 [list commit_committree $fd_wt $curHEAD $msg_p]
297 }
299 proc commit_committree {fd_wt curHEAD msg_p} {
300 global HEAD PARENT MERGE_HEAD commit_type
301 global current_branch
302 global ui_comm selected_commit_type
303 global file_states selected_paths rescan_active
304 global repo_config
306 gets $fd_wt tree_id
307 if {[catch {close $fd_wt} err]} {
308 catch {file delete $msg_p}
309 error_popup [strcat [mc "write-tree failed:"] "\n\n$err"]
310 ui_status [mc "Commit failed."]
311 unlock_index
312 return
313 }
315 # -- Verify this wasn't an empty change.
316 #
317 if {$commit_type eq {normal}} {
318 set fd_ot [git_read cat-file commit $PARENT]
319 fconfigure $fd_ot -encoding binary -translation lf
320 set old_tree [gets $fd_ot]
321 close $fd_ot
323 if {[string equal -length 5 {tree } $old_tree]
324 && [string length $old_tree] == 45} {
325 set old_tree [string range $old_tree 5 end]
326 } else {
327 error [mc "Commit %s appears to be corrupt" $PARENT]
328 }
330 if {$tree_id eq $old_tree} {
331 catch {file delete $msg_p}
332 info_popup [mc "No changes to commit.
334 No files were modified by this commit and it was not a merge commit.
336 A rescan will be automatically started now.
337 "]
338 unlock_index
339 rescan {ui_status [mc "No changes to commit."]}
340 return
341 }
342 }
344 # -- Create the commit.
345 #
346 set cmd [list commit-tree $tree_id]
347 foreach p [concat $PARENT $MERGE_HEAD] {
348 lappend cmd -p $p
349 }
350 lappend cmd <$msg_p
351 if {[catch {set cmt_id [eval git $cmd]} err]} {
352 catch {file delete $msg_p}
353 error_popup [strcat [mc "commit-tree failed:"] "\n\n$err"]
354 ui_status [mc "Commit failed."]
355 unlock_index
356 return
357 }
359 # -- Update the HEAD ref.
360 #
361 set reflogm commit
362 if {$commit_type ne {normal}} {
363 append reflogm " ($commit_type)"
364 }
365 set msg_fd [open $msg_p r]
366 gets $msg_fd subject
367 close $msg_fd
368 append reflogm {: } $subject
369 if {[catch {
370 git update-ref -m $reflogm HEAD $cmt_id $curHEAD
371 } err]} {
372 catch {file delete $msg_p}
373 error_popup [strcat [mc "update-ref failed:"] "\n\n$err"]
374 ui_status [mc "Commit failed."]
375 unlock_index
376 return
377 }
379 # -- Cleanup after ourselves.
380 #
381 catch {file delete $msg_p}
382 catch {file delete [gitdir MERGE_HEAD]}
383 catch {file delete [gitdir MERGE_MSG]}
384 catch {file delete [gitdir SQUASH_MSG]}
385 catch {file delete [gitdir GITGUI_MSG]}
387 # -- Let rerere do its thing.
388 #
389 if {[get_config rerere.enabled] eq {}} {
390 set rerere [file isdirectory [gitdir rr-cache]]
391 } else {
392 set rerere [is_config_true rerere.enabled]
393 }
394 if {$rerere} {
395 catch {git rerere}
396 }
398 # -- Run the post-commit hook.
399 #
400 set fd_ph [githook_read post-commit]
401 if {$fd_ph ne {}} {
402 upvar #0 pch_error$cmt_id pc_err
403 set pc_err {}
404 fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
405 fileevent $fd_ph readable \
406 [list commit_postcommit_wait $fd_ph $cmt_id]
407 }
409 $ui_comm delete 0.0 end
410 $ui_comm edit reset
411 $ui_comm edit modified false
412 if {$::GITGUI_BCK_exists} {
413 catch {file delete [gitdir GITGUI_BCK]}
414 set ::GITGUI_BCK_exists 0
415 }
417 if {[is_enabled singlecommit]} { do_quit 0 }
419 # -- Update in memory status
420 #
421 set selected_commit_type new
422 set commit_type normal
423 set HEAD $cmt_id
424 set PARENT $cmt_id
425 set MERGE_HEAD [list]
427 foreach path [array names file_states] {
428 set s $file_states($path)
429 set m [lindex $s 0]
430 switch -glob -- $m {
431 _O -
432 _M -
433 _D {continue}
434 __ -
435 A_ -
436 M_ -
437 T_ -
438 D_ {
439 unset file_states($path)
440 catch {unset selected_paths($path)}
441 }
442 DO {
443 set file_states($path) [list _O [lindex $s 1] {} {}]
444 }
445 AM -
446 AD -
447 MM -
448 MD {
449 set file_states($path) [list \
450 _[string index $m 1] \
451 [lindex $s 1] \
452 [lindex $s 3] \
453 {}]
454 }
455 }
456 }
458 display_all_files
459 unlock_index
460 reshow_diff
461 ui_status [mc "Created commit %s: %s" [string range $cmt_id 0 7] $subject]
462 }
464 proc commit_postcommit_wait {fd_ph cmt_id} {
465 upvar #0 pch_error$cmt_id pch_error
467 append pch_error [read $fd_ph]
468 fconfigure $fd_ph -blocking 1
469 if {[eof $fd_ph]} {
470 if {[catch {close $fd_ph}]} {
471 hook_failed_popup post-commit $pch_error 0
472 }
473 unset pch_error
474 return
475 }
476 fconfigure $fd_ph -blocking 0
477 }