git-gui/lib/commit.tcl

   1 # git-gui misc. commit reading/writing support
   2 # Copyright (C) 2006, 2007 Shawn Pearce
   3
   4 proc load_last_commit {} {
   5         global HEAD PARENT MERGE_HEAD commit_type ui_comm
   6         global repo_config
   7
   8         if {[llength $PARENT] == 0} {
   9                 error_popup [mc "There is nothing to amend.
  10
  11 You are about to create the initial commit.  There is no commit before this to amend.
  12 "]
  13                 return
  14         }
  15
  16         repository_state curType curHEAD curMERGE_HEAD
  17         if {$curType eq {merge}} {
  18                 error_popup [mc "Cannot amend while merging.
  19
  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         }
  24
  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                         # By default commits are assumed to be in utf-8
  31                         set enc utf-8
  32                         while {[gets $fd line] > 0} {
  33                                 if {[string match {parent *} $line]} {
  34                                         lappend parents [string range $line 7 end]
  35                                 } elseif {[string match {encoding *} $line]} {
  36                                         set enc [string tolower [string range $line 9 end]]
  37                                 }
  38                         }
  39                         set msg [read $fd]
  40                         close $fd
  41
  42                         set enc [tcl_encoding $enc]
  43                         if {$enc ne {}} {
  44                                 set msg [encoding convertfrom $enc $msg]
  45                         }
  46                         set msg [string trim $msg]
  47                 } err]} {
  48                 error_popup [strcat [mc "Error loading commit data for amend:"] "\n\n$err"]
  49                 return
  50         }
  51
  52         set HEAD $curHEAD
  53         set PARENT $parents
  54         set MERGE_HEAD [list]
  55         switch -- [llength $parents] {
  56         0       {set commit_type amend-initial}
  57         1       {set commit_type amend}
  58         default {set commit_type amend-merge}
  59         }
  60
  61         $ui_comm delete 0.0 end
  62         $ui_comm insert end $msg
  63         $ui_comm edit reset
  64         $ui_comm edit modified false
  65         rescan ui_ready
  66 }
  67
  68 set GIT_COMMITTER_IDENT {}
  69
  70 proc committer_ident {} {
  71         global GIT_COMMITTER_IDENT
  72
  73         if {$GIT_COMMITTER_IDENT eq {}} {
  74                 if {[catch {set me [git var GIT_COMMITTER_IDENT]} err]} {
  75                         error_popup [strcat [mc "Unable to obtain your identity:"] "\n\n$err"]
  76                         return {}
  77                 }
  78                 if {![regexp {^(.*) [0-9]+ [-+0-9]+$} \
  79                         $me me GIT_COMMITTER_IDENT]} {
  80                         error_popup [strcat [mc "Invalid GIT_COMMITTER_IDENT:"] "\n\n$me"]
  81                         return {}
  82                 }
  83         }
  84
  85         return $GIT_COMMITTER_IDENT
  86 }
  87
  88 proc do_signoff {} {
  89         global ui_comm
  90
  91         set me [committer_ident]
  92         if {$me eq {}} return
  93
  94         set sob "Signed-off-by: $me"
  95         set last [$ui_comm get {end -1c linestart} {end -1c}]
  96         if {$last ne $sob} {
  97                 $ui_comm edit separator
  98                 if {$last ne {}
  99                         && ![regexp {^[A-Z][A-Za-z]*-[A-Za-z-]+: *} $last]} {
 100                         $ui_comm insert end "\n"
 101                 }
 102                 $ui_comm insert end "\n$sob"
 103                 $ui_comm edit separator
 104                 $ui_comm see end
 105         }
 106 }
 107
 108 proc create_new_commit {} {
 109         global commit_type ui_comm
 110
 111         set commit_type normal
 112         $ui_comm delete 0.0 end
 113         $ui_comm edit reset
 114         $ui_comm edit modified false
 115         rescan ui_ready
 116 }
 117
 118 proc commit_tree {} {
 119         global HEAD commit_type file_states ui_comm repo_config
 120         global pch_error
 121
 122         if {[committer_ident] eq {}} return
 123         if {![lock_index update]} return
 124
 125         # -- Our in memory state should match the repository.
 126         #
 127         repository_state curType curHEAD curMERGE_HEAD
 128         if {[string match amend* $commit_type]
 129                 && $curType eq {normal}
 130                 && $curHEAD eq $HEAD} {
 131         } elseif {$commit_type ne $curType || $HEAD ne $curHEAD} {
 132                 info_popup [mc "Last scanned state does not match repository state.
 133
 134 Another Git program has modified this repository since the last scan.  A rescan must be performed before another commit can be created.
 135
 136 The rescan will be automatically started now.
 137 "]
 138                 unlock_index
 139                 rescan ui_ready
 140                 return
 141         }
 142
 143         # -- At least one file should differ in the index.
 144         #
 145         set files_ready 0
 146         foreach path [array names file_states] {
 147                 switch -glob -- [lindex $file_states($path) 0] {
 148                 _? {continue}
 149                 A? -
 150                 D? -
 151                 T_ -
 152                 M? {set files_ready 1}
 153                 _U -
 154                 U? {
 155                         error_popup [mc "Unmerged files cannot be committed.
 156
 157 File %s has merge conflicts.  You must resolve them and stage the file before committing.
 158 " [short_path $path]]
 159                         unlock_index
 160                         return
 161                 }
 162                 default {
 163                         error_popup [mc "Unknown file state %s detected.
 164
 165 File %s cannot be committed by this program.
 166 " [lindex $s 0] [short_path $path]]
 167                 }
 168                 }
 169         }
 170         if {!$files_ready && ![string match *merge $curType] && ![is_enabled nocommit]} {
 171                 info_popup [mc "No changes to commit.
 172
 173 You must stage at least 1 file before you can commit.
 174 "]
 175                 unlock_index
 176                 return
 177         }
 178
 179         if {[is_enabled nocommitmsg]} { do_quit 0 }
 180
 181         # -- A message is required.
 182         #
 183         set msg [string trim [$ui_comm get 1.0 end]]
 184         regsub -all -line {[ \t\r]+$} $msg {} msg
 185         if {$msg eq {}} {
 186                 error_popup [mc "Please supply a commit message.
 187
 188 A good commit message has the following format:
 189
 190 - First line: Describe in one sentence what you did.
 191 - Second line: Blank
 192 - Remaining lines: Describe why this change is good.
 193 "]
 194                 unlock_index
 195                 return
 196         }
 197
 198         # -- Build the message file.
 199         #
 200         set msg_p [gitdir GITGUI_EDITMSG]
 201         set msg_wt [open $msg_p w]
 202         fconfigure $msg_wt -translation lf
 203         if {[catch {set enc $repo_config(i18n.commitencoding)}]} {
 204                 set enc utf-8
 205         }
 206         set use_enc [tcl_encoding $enc]
 207         if {$use_enc ne {}} {
 208                 fconfigure $msg_wt -encoding $use_enc
 209         } else {
 210                 error_popup [mc "warning: Tcl does not support encoding '%s'." $enc]
 211                 fconfigure $msg_wt -encoding utf-8
 212         }
 213         puts $msg_wt $msg
 214         close $msg_wt
 215
 216         if {[is_enabled nocommit]} { do_quit 0 }
 217
 218         # -- Run the pre-commit hook.
 219         #
 220         set fd_ph [githook_read pre-commit]
 221         if {$fd_ph eq {}} {
 222                 commit_commitmsg $curHEAD $msg_p
 223                 return
 224         }
 225
 226         ui_status [mc "Calling pre-commit hook..."]
 227         set pch_error {}
 228         fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
 229         fileevent $fd_ph readable \
 230                 [list commit_prehook_wait $fd_ph $curHEAD $msg_p]
 231 }
 232
 233 proc commit_prehook_wait {fd_ph curHEAD msg_p} {
 234         global pch_error
 235
 236         append pch_error [read $fd_ph]
 237         fconfigure $fd_ph -blocking 1
 238         if {[eof $fd_ph]} {
 239                 if {[catch {close $fd_ph}]} {
 240                         catch {file delete $msg_p}
 241                         ui_status [mc "Commit declined by pre-commit hook."]
 242                         hook_failed_popup pre-commit $pch_error
 243                         unlock_index
 244                 } else {
 245                         commit_commitmsg $curHEAD $msg_p
 246                 }
 247                 set pch_error {}
 248                 return
 249         }
 250         fconfigure $fd_ph -blocking 0
 251 }
 252
 253 proc commit_commitmsg {curHEAD msg_p} {
 254         global pch_error
 255
 256         # -- Run the commit-msg hook.
 257         #
 258         set fd_ph [githook_read commit-msg $msg_p]
 259         if {$fd_ph eq {}} {
 260                 commit_writetree $curHEAD $msg_p
 261                 return
 262         }
 263
 264         ui_status [mc "Calling commit-msg hook..."]
 265         set pch_error {}
 266         fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
 267         fileevent $fd_ph readable \
 268                 [list commit_commitmsg_wait $fd_ph $curHEAD $msg_p]
 269 }
 270
 271 proc commit_commitmsg_wait {fd_ph curHEAD msg_p} {
 272         global pch_error
 273
 274         append pch_error [read $fd_ph]
 275         fconfigure $fd_ph -blocking 1
 276         if {[eof $fd_ph]} {
 277                 if {[catch {close $fd_ph}]} {
 278                         catch {file delete $msg_p}
 279                         ui_status [mc "Commit declined by commit-msg hook."]
 280                         hook_failed_popup commit-msg $pch_error
 281                         unlock_index
 282                 } else {
 283                         commit_writetree $curHEAD $msg_p
 284                 }
 285                 set pch_error {}
 286                 return
 287         }
 288         fconfigure $fd_ph -blocking 0
 289 }
 290
 291 proc commit_writetree {curHEAD msg_p} {
 292         ui_status [mc "Committing changes..."]
 293         set fd_wt [git_read write-tree]
 294         fileevent $fd_wt readable \
 295                 [list commit_committree $fd_wt $curHEAD $msg_p]
 296 }
 297
 298 proc commit_committree {fd_wt curHEAD msg_p} {
 299         global HEAD PARENT MERGE_HEAD commit_type
 300         global current_branch
 301         global ui_comm selected_commit_type
 302         global file_states selected_paths rescan_active
 303         global repo_config
 304
 305         gets $fd_wt tree_id
 306         if {[catch {close $fd_wt} err]} {
 307                 catch {file delete $msg_p}
 308                 error_popup [strcat [mc "write-tree failed:"] "\n\n$err"]
 309                 ui_status [mc "Commit failed."]
 310                 unlock_index
 311                 return
 312         }
 313
 314         # -- Verify this wasn't an empty change.
 315         #
 316         if {$commit_type eq {normal}} {
 317                 set fd_ot [git_read cat-file commit $PARENT]
 318                 fconfigure $fd_ot -encoding binary -translation lf
 319                 set old_tree [gets $fd_ot]
 320                 close $fd_ot
 321
 322                 if {[string equal -length 5 {tree } $old_tree]
 323                         && [string length $old_tree] == 45} {
 324                         set old_tree [string range $old_tree 5 end]
 325                 } else {
 326                         error [mc "Commit %s appears to be corrupt" $PARENT]
 327                 }
 328
 329                 if {$tree_id eq $old_tree} {
 330                         catch {file delete $msg_p}
 331                         info_popup [mc "No changes to commit.
 332
 333 No files were modified by this commit and it was not a merge commit.
 334
 335 A rescan will be automatically started now.
 336 "]
 337                         unlock_index
 338                         rescan {ui_status [mc "No changes to commit."]}
 339                         return
 340                 }
 341         }
 342
 343         # -- Create the commit.
 344         #
 345         set cmd [list commit-tree $tree_id]
 346         foreach p [concat $PARENT $MERGE_HEAD] {
 347                 lappend cmd -p $p
 348         }
 349         lappend cmd <$msg_p
 350         if {[catch {set cmt_id [eval git $cmd]} err]} {
 351                 catch {file delete $msg_p}
 352                 error_popup [strcat [mc "commit-tree failed:"] "\n\n$err"]
 353                 ui_status [mc "Commit failed."]
 354                 unlock_index
 355                 return
 356         }
 357
 358         # -- Update the HEAD ref.
 359         #
 360         set reflogm commit
 361         if {$commit_type ne {normal}} {
 362                 append reflogm " ($commit_type)"
 363         }
 364         set msg_fd [open $msg_p r]
 365         gets $msg_fd subject
 366         close $msg_fd
 367         append reflogm {: } $subject
 368         if {[catch {
 369                         git update-ref -m $reflogm HEAD $cmt_id $curHEAD
 370                 } err]} {
 371                 catch {file delete $msg_p}
 372                 error_popup [strcat [mc "update-ref failed:"] "\n\n$err"]
 373                 ui_status [mc "Commit failed."]
 374                 unlock_index
 375                 return
 376         }
 377
 378         # -- Cleanup after ourselves.
 379         #
 380         catch {file delete $msg_p}
 381         catch {file delete [gitdir MERGE_HEAD]}
 382         catch {file delete [gitdir MERGE_MSG]}
 383         catch {file delete [gitdir SQUASH_MSG]}
 384         catch {file delete [gitdir GITGUI_MSG]}
 385
 386         # -- Let rerere do its thing.
 387         #
 388         if {[get_config rerere.enabled] eq {}} {
 389                 set rerere [file isdirectory [gitdir rr-cache]]
 390         } else {
 391                 set rerere [is_config_true rerere.enabled]
 392         }
 393         if {$rerere} {
 394                 catch {git rerere}
 395         }
 396
 397         # -- Run the post-commit hook.
 398         #
 399         set fd_ph [githook_read post-commit]
 400         if {$fd_ph ne {}} {
 401                 upvar #0 pch_error$cmt_id pc_err
 402                 set pc_err {}
 403                 fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
 404                 fileevent $fd_ph readable \
 405                         [list commit_postcommit_wait $fd_ph $cmt_id]
 406         }
 407
 408         $ui_comm delete 0.0 end
 409         $ui_comm edit reset
 410         $ui_comm edit modified false
 411         if {$::GITGUI_BCK_exists} {
 412                 catch {file delete [gitdir GITGUI_BCK]}
 413                 set ::GITGUI_BCK_exists 0
 414         }
 415
 416         if {[is_enabled singlecommit]} { do_quit 0 }
 417
 418         # -- Update in memory status
 419         #
 420         set selected_commit_type new
 421         set commit_type normal
 422         set HEAD $cmt_id
 423         set PARENT $cmt_id
 424         set MERGE_HEAD [list]
 425
 426         foreach path [array names file_states] {
 427                 set s $file_states($path)
 428                 set m [lindex $s 0]
 429                 switch -glob -- $m {
 430                 _O -
 431                 _M -
 432                 _D {continue}
 433                 __ -
 434                 A_ -
 435                 M_ -
 436                 T_ -
 437                 D_ {
 438                         unset file_states($path)
 439                         catch {unset selected_paths($path)}
 440                 }
 441                 DO {
 442                         set file_states($path) [list _O [lindex $s 1] {} {}]
 443                 }
 444                 AM -
 445                 AD -
 446                 MM -
 447                 MD {
 448                         set file_states($path) [list \
 449                                 _[string index $m 1] \
 450                                 [lindex $s 1] \
 451                                 [lindex $s 3] \
 452                                 {}]
 453                 }
 454                 }
 455         }
 456
 457         display_all_files
 458         unlock_index
 459         reshow_diff
 460         ui_status [mc "Created commit %s: %s" [string range $cmt_id 0 7] $subject]
 461 }
 462
 463 proc commit_postcommit_wait {fd_ph cmt_id} {
 464         upvar #0 pch_error$cmt_id pch_error
 465
 466         append pch_error [read $fd_ph]
 467         fconfigure $fd_ph -blocking 1
 468         if {[eof $fd_ph]} {
 469                 if {[catch {close $fd_ph}]} {
 470                         hook_failed_popup post-commit $pch_error 0
 471                 }
 472                 unset pch_error
 473                 return
 474         }
 475         fconfigure $fd_ph -blocking 0
 476 }