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