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 commit_author
   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 name ""
  29                         set email ""
  30                         set fd [git_read cat-file commit $curHEAD]
  31                         fconfigure $fd -encoding binary -translation lf
  32                         # By default commits are assumed to be in utf-8
  33                         set enc utf-8
  34                         while {[gets $fd line] > 0} {
  35                                 if {[string match {parent *} $line]} {
  36                                         lappend parents [string range $line 7 end]
  37                                 } elseif {[string match {encoding *} $line]} {
  38                                         set enc [string tolower [string range $line 9 end]]
  39                                 } elseif {[regexp "author (.*)\\s<(.*)>\\s(\\d.*$)" $line all name email time]} { }
  40                         }
  41                         set msg [read $fd]
  42                         close $fd
  43
  44                         set enc [tcl_encoding $enc]
  45                         if {$enc ne {}} {
  46                                 set msg [encoding convertfrom $enc $msg]
  47                                 set name [encoding convertfrom $enc $name]
  48                                 set email [encoding convertfrom $enc $email]
  49                         }
  50                         if {$name ne {} && $email ne {}} {
  51                                 set commit_author [list name $name email $email date $time]
  52                         }
  53
  54                         set msg [string trim $msg]
  55                 } err]} {
  56                 error_popup [strcat [mc "Error loading commit data for amend:"] "\n\n$err"]
  57                 return
  58         }
  59
  60         set HEAD $curHEAD
  61         set PARENT $parents
  62         set MERGE_HEAD [list]
  63         switch -- [llength $parents] {
  64         0       {set commit_type amend-initial}
  65         1       {set commit_type amend}
  66         default {set commit_type amend-merge}
  67         }
  68
  69         $ui_comm delete 0.0 end
  70         $ui_comm insert end $msg
  71         $ui_comm edit reset
  72         $ui_comm edit modified false
  73         rescan ui_ready
  74 }
  75
  76 set GIT_COMMITTER_IDENT {}
  77
  78 proc committer_ident {} {
  79         global GIT_COMMITTER_IDENT
  80
  81         if {$GIT_COMMITTER_IDENT eq {}} {
  82                 if {[catch {set me [git var GIT_COMMITTER_IDENT]} err]} {
  83                         error_popup [strcat [mc "Unable to obtain your identity:"] "\n\n$err"]
  84                         return {}
  85                 }
  86                 if {![regexp {^(.*) [0-9]+ [-+0-9]+$} \
  87                         $me me GIT_COMMITTER_IDENT]} {
  88                         error_popup [strcat [mc "Invalid GIT_COMMITTER_IDENT:"] "\n\n$me"]
  89                         return {}
  90                 }
  91         }
  92
  93         return $GIT_COMMITTER_IDENT
  94 }
  95
  96 proc do_signoff {} {
  97         global ui_comm
  98
  99         set me [committer_ident]
 100         if {$me eq {}} return
 101
 102         set sob "Signed-off-by: $me"
 103         set last [$ui_comm get {end -1c linestart} {end -1c}]
 104         if {$last ne $sob} {
 105                 $ui_comm edit separator
 106                 if {$last ne {}
 107                         && ![regexp {^[A-Z][A-Za-z]*-[A-Za-z-]+: *} $last]} {
 108                         $ui_comm insert end "\n"
 109                 }
 110                 $ui_comm insert end "\n$sob"
 111                 $ui_comm edit separator
 112                 $ui_comm see end
 113         }
 114 }
 115
 116 proc create_new_commit {} {
 117         global commit_type ui_comm commit_author
 118
 119         set commit_type normal
 120         unset -nocomplain commit_author
 121         $ui_comm delete 0.0 end
 122         $ui_comm edit reset
 123         $ui_comm edit modified false
 124         rescan ui_ready
 125 }
 126
 127 proc setup_commit_encoding {msg_wt {quiet 0}} {
 128         global repo_config
 129
 130         if {[catch {set enc $repo_config(i18n.commitencoding)}]} {
 131                 set enc utf-8
 132         }
 133         set use_enc [tcl_encoding $enc]
 134         if {$use_enc ne {}} {
 135                 fconfigure $msg_wt -encoding $use_enc
 136         } else {
 137                 if {!$quiet} {
 138                         error_popup [mc "warning: Tcl does not support encoding '%s'." $enc]
 139                 }
 140                 fconfigure $msg_wt -encoding utf-8
 141         }
 142 }
 143
 144 proc commit_tree {} {
 145         global HEAD commit_type file_states ui_comm repo_config
 146         global pch_error
 147
 148         if {[committer_ident] eq {}} return
 149         if {![lock_index update]} return
 150
 151         # -- Our in memory state should match the repository.
 152         #
 153         repository_state curType curHEAD curMERGE_HEAD
 154         if {[string match amend* $commit_type]
 155                 && $curType eq {normal}
 156                 && $curHEAD eq $HEAD} {
 157         } elseif {$commit_type ne $curType || $HEAD ne $curHEAD} {
 158                 info_popup [mc "Last scanned state does not match repository state.
 159
 160 Another Git program has modified this repository since the last scan.  A rescan must be performed before another commit can be created.
 161
 162 The rescan will be automatically started now.
 163 "]
 164                 unlock_index
 165                 rescan ui_ready
 166                 return
 167         }
 168
 169         # -- At least one file should differ in the index.
 170         #
 171         set files_ready 0
 172         foreach path [array names file_states] {
 173                 set s $file_states($path)
 174                 switch -glob -- [lindex $s 0] {
 175                 _? {continue}
 176                 A? -
 177                 D? -
 178                 T? -
 179                 M? {set files_ready 1}
 180                 _U -
 181                 U? {
 182                         error_popup [mc "Unmerged files cannot be committed.
 183
 184 File %s has merge conflicts.  You must resolve them and stage the file before committing.
 185 " [short_path $path]]
 186                         unlock_index
 187                         return
 188                 }
 189                 default {
 190                         error_popup [mc "Unknown file state %s detected.
 191
 192 File %s cannot be committed by this program.
 193 " [lindex $s 0] [short_path $path]]
 194                 }
 195                 }
 196         }
 197         if {!$files_ready && ![string match *merge $curType] && ![is_enabled nocommit]} {
 198                 info_popup [mc "No changes to commit.
 199
 200 You must stage at least 1 file before you can commit.
 201 "]
 202                 unlock_index
 203                 return
 204         }
 205
 206         if {[is_enabled nocommitmsg]} { do_quit 0 }
 207
 208         # -- A message is required.
 209         #
 210         set msg [string trim [$ui_comm get 1.0 end]]
 211         regsub -all -line {[ \t\r]+$} $msg {} msg
 212         if {$msg eq {}} {
 213                 error_popup [mc "Please supply a commit message.
 214
 215 A good commit message has the following format:
 216
 217 - First line: Describe in one sentence what you did.
 218 - Second line: Blank
 219 - Remaining lines: Describe why this change is good.
 220 "]
 221                 unlock_index
 222                 return
 223         }
 224
 225         # -- Build the message file.
 226         #
 227         set msg_p [gitdir GITGUI_EDITMSG]
 228         set msg_wt [open $msg_p w]
 229         fconfigure $msg_wt -translation lf
 230         setup_commit_encoding $msg_wt
 231         puts $msg_wt $msg
 232         close $msg_wt
 233
 234         if {[is_enabled nocommit]} { do_quit 0 }
 235
 236         # -- Run the pre-commit hook.
 237         #
 238         set fd_ph [githook_read pre-commit]
 239         if {$fd_ph eq {}} {
 240                 commit_commitmsg $curHEAD $msg_p
 241                 return
 242         }
 243
 244         ui_status [mc "Calling pre-commit hook..."]
 245         set pch_error {}
 246         fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
 247         fileevent $fd_ph readable \
 248                 [list commit_prehook_wait $fd_ph $curHEAD $msg_p]
 249 }
 250
 251 proc commit_prehook_wait {fd_ph curHEAD msg_p} {
 252         global pch_error
 253
 254         append pch_error [read $fd_ph]
 255         fconfigure $fd_ph -blocking 1
 256         if {[eof $fd_ph]} {
 257                 if {[catch {close $fd_ph}]} {
 258                         catch {file delete $msg_p}
 259                         ui_status [mc "Commit declined by pre-commit hook."]
 260                         hook_failed_popup pre-commit $pch_error
 261                         unlock_index
 262                 } else {
 263                         commit_commitmsg $curHEAD $msg_p
 264                 }
 265                 set pch_error {}
 266                 return
 267         }
 268         fconfigure $fd_ph -blocking 0
 269 }
 270
 271 proc commit_commitmsg {curHEAD msg_p} {
 272         global is_detached repo_config
 273         global pch_error
 274
 275         if {$is_detached
 276             && ![file exists [gitdir rebase-merge head-name]]
 277             &&  [is_config_true gui.warndetachedcommit]} {
 278                 set msg [mc "You are about to commit on a detached head.\
 279 This is a potentially dangerous thing to do because if you switch\
 280 to another branch you will lose your changes and it can be difficult\
 281 to retrieve them later from the reflog. You should probably cancel this\
 282 commit and create a new branch to continue.\n\
 283 \n\
 284 Do you really want to proceed with your Commit?"]
 285                 if {[ask_popup $msg] ne yes} {
 286                         unlock_index
 287                         return
 288                 }
 289         }
 290
 291         # -- Run the commit-msg hook.
 292         #
 293         set fd_ph [githook_read commit-msg $msg_p]
 294         if {$fd_ph eq {}} {
 295                 commit_writetree $curHEAD $msg_p
 296                 return
 297         }
 298
 299         ui_status [mc "Calling commit-msg hook..."]
 300         set pch_error {}
 301         fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
 302         fileevent $fd_ph readable \
 303                 [list commit_commitmsg_wait $fd_ph $curHEAD $msg_p]
 304 }
 305
 306 proc commit_commitmsg_wait {fd_ph curHEAD msg_p} {
 307         global pch_error
 308
 309         append pch_error [read $fd_ph]
 310         fconfigure $fd_ph -blocking 1
 311         if {[eof $fd_ph]} {
 312                 if {[catch {close $fd_ph}]} {
 313                         catch {file delete $msg_p}
 314                         ui_status [mc "Commit declined by commit-msg hook."]
 315                         hook_failed_popup commit-msg $pch_error
 316                         unlock_index
 317                 } else {
 318                         commit_writetree $curHEAD $msg_p
 319                 }
 320                 set pch_error {}
 321                 return
 322         }
 323         fconfigure $fd_ph -blocking 0
 324 }
 325
 326 proc commit_writetree {curHEAD msg_p} {
 327         ui_status [mc "Committing changes..."]
 328         set fd_wt [git_read write-tree]
 329         fileevent $fd_wt readable \
 330                 [list commit_committree $fd_wt $curHEAD $msg_p]
 331 }
 332
 333 proc commit_committree {fd_wt curHEAD msg_p} {
 334         global HEAD PARENT MERGE_HEAD commit_type commit_author
 335         global current_branch
 336         global ui_comm commit_type_is_amend
 337         global file_states selected_paths rescan_active
 338         global repo_config
 339         global env
 340
 341         gets $fd_wt tree_id
 342         if {[catch {close $fd_wt} err]} {
 343                 catch {file delete $msg_p}
 344                 error_popup [strcat [mc "write-tree failed:"] "\n\n$err"]
 345                 ui_status [mc "Commit failed."]
 346                 unlock_index
 347                 return
 348         }
 349
 350         # -- Verify this wasn't an empty change.
 351         #
 352         if {$commit_type eq {normal}} {
 353                 set fd_ot [git_read cat-file commit $PARENT]
 354                 fconfigure $fd_ot -encoding binary -translation lf
 355                 set old_tree [gets $fd_ot]
 356                 close $fd_ot
 357
 358                 if {[string equal -length 5 {tree } $old_tree]
 359                         && [string length $old_tree] == 45} {
 360                         set old_tree [string range $old_tree 5 end]
 361                 } else {
 362                         error [mc "Commit %s appears to be corrupt" $PARENT]
 363                 }
 364
 365                 if {$tree_id eq $old_tree} {
 366                         catch {file delete $msg_p}
 367                         info_popup [mc "No changes to commit.
 368
 369 No files were modified by this commit and it was not a merge commit.
 370
 371 A rescan will be automatically started now.
 372 "]
 373                         unlock_index
 374                         rescan {ui_status [mc "No changes to commit."]}
 375                         return
 376                 }
 377         }
 378
 379         if {[info exists commit_author]} {
 380                 set old_author [commit_author_ident $commit_author]
 381         }
 382         # -- Create the commit.
 383         #
 384         set cmd [list commit-tree $tree_id]
 385         if {[is_config_true commit.gpgsign]} {
 386                 lappend cmd -S
 387         }
 388         foreach p [concat $PARENT $MERGE_HEAD] {
 389                 lappend cmd -p $p
 390         }
 391         lappend cmd <$msg_p
 392         if {[catch {set cmt_id [eval git $cmd]} err]} {
 393                 catch {file delete $msg_p}
 394                 error_popup [strcat [mc "commit-tree failed:"] "\n\n$err"]
 395                 ui_status [mc "Commit failed."]
 396                 unlock_index
 397                 unset -nocomplain commit_author
 398                 commit_author_reset $old_author
 399                 return
 400         }
 401         if {[info exists commit_author]} {
 402                 unset -nocomplain commit_author
 403                 commit_author_reset $old_author
 404         }
 405
 406         # -- Update the HEAD ref.
 407         #
 408         set reflogm commit
 409         if {$commit_type ne {normal}} {
 410                 append reflogm " ($commit_type)"
 411         }
 412         set msg_fd [open $msg_p r]
 413         setup_commit_encoding $msg_fd 1
 414         gets $msg_fd subject
 415         close $msg_fd
 416         append reflogm {: } $subject
 417         if {[catch {
 418                         git update-ref -m $reflogm HEAD $cmt_id $curHEAD
 419                 } err]} {
 420                 catch {file delete $msg_p}
 421                 error_popup [strcat [mc "update-ref failed:"] "\n\n$err"]
 422                 ui_status [mc "Commit failed."]
 423                 unlock_index
 424                 return
 425         }
 426
 427         # -- Cleanup after ourselves.
 428         #
 429         catch {file delete $msg_p}
 430         catch {file delete [gitdir MERGE_HEAD]}
 431         catch {file delete [gitdir MERGE_MSG]}
 432         catch {file delete [gitdir SQUASH_MSG]}
 433         catch {file delete [gitdir GITGUI_MSG]}
 434         catch {file delete [gitdir CHERRY_PICK_HEAD]}
 435
 436         # -- Let rerere do its thing.
 437         #
 438         if {[get_config rerere.enabled] eq {}} {
 439                 set rerere [file isdirectory [gitdir rr-cache]]
 440         } else {
 441                 set rerere [is_config_true rerere.enabled]
 442         }
 443         if {$rerere} {
 444                 catch {git rerere}
 445         }
 446
 447         # -- Run the post-commit hook.
 448         #
 449         set fd_ph [githook_read post-commit]
 450         if {$fd_ph ne {}} {
 451                 global pch_error
 452                 set pch_error {}
 453                 fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
 454                 fileevent $fd_ph readable \
 455                         [list commit_postcommit_wait $fd_ph $cmt_id]
 456         }
 457
 458         $ui_comm delete 0.0 end
 459         load_message [get_config commit.template]
 460         $ui_comm edit reset
 461         $ui_comm edit modified false
 462         if {$::GITGUI_BCK_exists} {
 463                 catch {file delete [gitdir GITGUI_BCK]}
 464                 set ::GITGUI_BCK_exists 0
 465         }
 466
 467         if {[is_enabled singlecommit]} { do_quit 0 }
 468
 469         # -- Update in memory status
 470         #
 471         set commit_type normal
 472         set commit_type_is_amend 0
 473         set HEAD $cmt_id
 474         set PARENT $cmt_id
 475         set MERGE_HEAD [list]
 476
 477         foreach path [array names file_states] {
 478                 set s $file_states($path)
 479                 set m [lindex $s 0]
 480                 switch -glob -- $m {
 481                 _O -
 482                 _M -
 483                 _D {continue}
 484                 __ -
 485                 A_ -
 486                 M_ -
 487                 T_ -
 488                 D_ {
 489                         unset file_states($path)
 490                         catch {unset selected_paths($path)}
 491                 }
 492                 DO {
 493                         set file_states($path) [list _O [lindex $s 1] {} {}]
 494                 }
 495                 AM -
 496                 AD -
 497                 AT -
 498                 TM -
 499                 TD -
 500                 MM -
 501                 MT -
 502                 MD {
 503                         set file_states($path) [list \
 504                                 _[string index $m 1] \
 505                                 [lindex $s 1] \
 506                                 [lindex $s 3] \
 507                                 {}]
 508                 }
 509                 }
 510         }
 511
 512         display_all_files
 513         unlock_index
 514         reshow_diff
 515         ui_status [mc "Created commit %s: %s" [string range $cmt_id 0 7] $subject]
 516 }
 517
 518 proc commit_postcommit_wait {fd_ph cmt_id} {
 519         global pch_error
 520
 521         append pch_error [read $fd_ph]
 522         fconfigure $fd_ph -blocking 1
 523         if {[eof $fd_ph]} {
 524                 if {[catch {close $fd_ph}]} {
 525                         hook_failed_popup post-commit $pch_error 0
 526                 }
 527                 unset pch_error
 528                 return
 529         }
 530         fconfigure $fd_ph -blocking 0
 531 }
 532
 533 proc commit_author_ident {details} {
 534         global env
 535         array set author $details
 536         set old [array get env GIT_AUTHOR_*]
 537         set env(GIT_AUTHOR_NAME) $author(name)
 538         set env(GIT_AUTHOR_EMAIL) $author(email)
 539         set env(GIT_AUTHOR_DATE) $author(date)
 540         return $old
 541 }
 542 proc commit_author_reset {details} {
 543         global env
 544         unset env(GIT_AUTHOR_NAME) env(GIT_AUTHOR_EMAIL) env(GIT_AUTHOR_DATE)
 545         if {$details ne {}} {
 546                 array set env $details
 547         }
 548 }