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 setup_commit_encoding {msg_wt {quiet 0}} {
 119         global repo_config
 120
 121         if {[catch {set enc $repo_config(i18n.commitencoding)}]} {
 122                 set enc utf-8
 123         }
 124         set use_enc [tcl_encoding $enc]
 125         if {$use_enc ne {}} {
 126                 fconfigure $msg_wt -encoding $use_enc
 127         } else {
 128                 if {!$quiet} {
 129                         error_popup [mc "warning: Tcl does not support encoding '%s'." $enc]
 130                 }
 131                 fconfigure $msg_wt -encoding utf-8
 132         }
 133 }
 134
 135 proc commit_tree {} {
 136         global HEAD commit_type file_states ui_comm repo_config
 137         global pch_error
 138
 139         if {[committer_ident] eq {}} return
 140         if {![lock_index update]} return
 141
 142         # -- Our in memory state should match the repository.
 143         #
 144         repository_state curType curHEAD curMERGE_HEAD
 145         if {[string match amend* $commit_type]
 146                 && $curType eq {normal}
 147                 && $curHEAD eq $HEAD} {
 148         } elseif {$commit_type ne $curType || $HEAD ne $curHEAD} {
 149                 info_popup [mc "Last scanned state does not match repository state.
 150
 151 Another Git program has modified this repository since the last scan.  A rescan must be performed before another commit can be created.
 152
 153 The rescan will be automatically started now.
 154 "]
 155                 unlock_index
 156                 rescan ui_ready
 157                 return
 158         }
 159
 160         # -- At least one file should differ in the index.
 161         #
 162         set files_ready 0
 163         foreach path [array names file_states] {
 164                 switch -glob -- [lindex $file_states($path) 0] {
 165                 _? {continue}
 166                 A? -
 167                 D? -
 168                 T_ -
 169                 M? {set files_ready 1}
 170                 _U -
 171                 U? {
 172                         error_popup [mc "Unmerged files cannot be committed.
 173
 174 File %s has merge conflicts.  You must resolve them and stage the file before committing.
 175 " [short_path $path]]
 176                         unlock_index
 177                         return
 178                 }
 179                 default {
 180                         error_popup [mc "Unknown file state %s detected.
 181
 182 File %s cannot be committed by this program.
 183 " [lindex $s 0] [short_path $path]]
 184                 }
 185                 }
 186         }
 187         if {!$files_ready && ![string match *merge $curType] && ![is_enabled nocommit]} {
 188                 info_popup [mc "No changes to commit.
 189
 190 You must stage at least 1 file before you can commit.
 191 "]
 192                 unlock_index
 193                 return
 194         }
 195
 196         if {[is_enabled nocommitmsg]} { do_quit 0 }
 197
 198         # -- A message is required.
 199         #
 200         set msg [string trim [$ui_comm get 1.0 end]]
 201         regsub -all -line {[ \t\r]+$} $msg {} msg
 202         if {$msg eq {}} {
 203                 error_popup [mc "Please supply a commit message.
 204
 205 A good commit message has the following format:
 206
 207 - First line: Describe in one sentence what you did.
 208 - Second line: Blank
 209 - Remaining lines: Describe why this change is good.
 210 "]
 211                 unlock_index
 212                 return
 213         }
 214
 215         # -- Build the message file.
 216         #
 217         set msg_p [gitdir GITGUI_EDITMSG]
 218         set msg_wt [open $msg_p w]
 219         fconfigure $msg_wt -translation lf
 220         setup_commit_encoding $msg_wt
 221         puts $msg_wt $msg
 222         close $msg_wt
 223
 224         if {[is_enabled nocommit]} { do_quit 0 }
 225
 226         # -- Run the pre-commit hook.
 227         #
 228         set fd_ph [githook_read pre-commit]
 229         if {$fd_ph eq {}} {
 230                 commit_commitmsg $curHEAD $msg_p
 231                 return
 232         }
 233
 234         ui_status [mc "Calling pre-commit hook..."]
 235         set pch_error {}
 236         fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
 237         fileevent $fd_ph readable \
 238                 [list commit_prehook_wait $fd_ph $curHEAD $msg_p]
 239 }
 240
 241 proc commit_prehook_wait {fd_ph curHEAD msg_p} {
 242         global pch_error
 243
 244         append pch_error [read $fd_ph]
 245         fconfigure $fd_ph -blocking 1
 246         if {[eof $fd_ph]} {
 247                 if {[catch {close $fd_ph}]} {
 248                         catch {file delete $msg_p}
 249                         ui_status [mc "Commit declined by pre-commit hook."]
 250                         hook_failed_popup pre-commit $pch_error
 251                         unlock_index
 252                 } else {
 253                         commit_commitmsg $curHEAD $msg_p
 254                 }
 255                 set pch_error {}
 256                 return
 257         }
 258         fconfigure $fd_ph -blocking 0
 259 }
 260
 261 proc commit_commitmsg {curHEAD msg_p} {
 262         global pch_error
 263
 264         # -- Run the commit-msg hook.
 265         #
 266         set fd_ph [githook_read commit-msg $msg_p]
 267         if {$fd_ph eq {}} {
 268                 commit_writetree $curHEAD $msg_p
 269                 return
 270         }
 271
 272         ui_status [mc "Calling commit-msg hook..."]
 273         set pch_error {}
 274         fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
 275         fileevent $fd_ph readable \
 276                 [list commit_commitmsg_wait $fd_ph $curHEAD $msg_p]
 277 }
 278
 279 proc commit_commitmsg_wait {fd_ph curHEAD msg_p} {
 280         global pch_error
 281
 282         append pch_error [read $fd_ph]
 283         fconfigure $fd_ph -blocking 1
 284         if {[eof $fd_ph]} {
 285                 if {[catch {close $fd_ph}]} {
 286                         catch {file delete $msg_p}
 287                         ui_status [mc "Commit declined by commit-msg hook."]
 288                         hook_failed_popup commit-msg $pch_error
 289                         unlock_index
 290                 } else {
 291                         commit_writetree $curHEAD $msg_p
 292                 }
 293                 set pch_error {}
 294                 return
 295         }
 296         fconfigure $fd_ph -blocking 0
 297 }
 298
 299 proc commit_writetree {curHEAD msg_p} {
 300         ui_status [mc "Committing changes..."]
 301         set fd_wt [git_read write-tree]
 302         fileevent $fd_wt readable \
 303                 [list commit_committree $fd_wt $curHEAD $msg_p]
 304 }
 305
 306 proc commit_committree {fd_wt curHEAD msg_p} {
 307         global HEAD PARENT MERGE_HEAD commit_type
 308         global current_branch
 309         global ui_comm selected_commit_type
 310         global file_states selected_paths rescan_active
 311         global repo_config
 312
 313         gets $fd_wt tree_id
 314         if {[catch {close $fd_wt} err]} {
 315                 catch {file delete $msg_p}
 316                 error_popup [strcat [mc "write-tree failed:"] "\n\n$err"]
 317                 ui_status [mc "Commit failed."]
 318                 unlock_index
 319                 return
 320         }
 321
 322         # -- Verify this wasn't an empty change.
 323         #
 324         if {$commit_type eq {normal}} {
 325                 set fd_ot [git_read cat-file commit $PARENT]
 326                 fconfigure $fd_ot -encoding binary -translation lf
 327                 set old_tree [gets $fd_ot]
 328                 close $fd_ot
 329
 330                 if {[string equal -length 5 {tree } $old_tree]
 331                         && [string length $old_tree] == 45} {
 332                         set old_tree [string range $old_tree 5 end]
 333                 } else {
 334                         error [mc "Commit %s appears to be corrupt" $PARENT]
 335                 }
 336
 337                 if {$tree_id eq $old_tree} {
 338                         catch {file delete $msg_p}
 339                         info_popup [mc "No changes to commit.
 340
 341 No files were modified by this commit and it was not a merge commit.
 342
 343 A rescan will be automatically started now.
 344 "]
 345                         unlock_index
 346                         rescan {ui_status [mc "No changes to commit."]}
 347                         return
 348                 }
 349         }
 350
 351         # -- Create the commit.
 352         #
 353         set cmd [list commit-tree $tree_id]
 354         foreach p [concat $PARENT $MERGE_HEAD] {
 355                 lappend cmd -p $p
 356         }
 357         lappend cmd <$msg_p
 358         if {[catch {set cmt_id [eval git $cmd]} err]} {
 359                 catch {file delete $msg_p}
 360                 error_popup [strcat [mc "commit-tree failed:"] "\n\n$err"]
 361                 ui_status [mc "Commit failed."]
 362                 unlock_index
 363                 return
 364         }
 365
 366         # -- Update the HEAD ref.
 367         #
 368         set reflogm commit
 369         if {$commit_type ne {normal}} {
 370                 append reflogm " ($commit_type)"
 371         }
 372         set msg_fd [open $msg_p r]
 373         setup_commit_encoding $msg_fd 1
 374         gets $msg_fd subject
 375         close $msg_fd
 376         append reflogm {: } $subject
 377         if {[catch {
 378                         git update-ref -m $reflogm HEAD $cmt_id $curHEAD
 379                 } err]} {
 380                 catch {file delete $msg_p}
 381                 error_popup [strcat [mc "update-ref failed:"] "\n\n$err"]
 382                 ui_status [mc "Commit failed."]
 383                 unlock_index
 384                 return
 385         }
 386
 387         # -- Cleanup after ourselves.
 388         #
 389         catch {file delete $msg_p}
 390         catch {file delete [gitdir MERGE_HEAD]}
 391         catch {file delete [gitdir MERGE_MSG]}
 392         catch {file delete [gitdir SQUASH_MSG]}
 393         catch {file delete [gitdir GITGUI_MSG]}
 394
 395         # -- Let rerere do its thing.
 396         #
 397         if {[get_config rerere.enabled] eq {}} {
 398                 set rerere [file isdirectory [gitdir rr-cache]]
 399         } else {
 400                 set rerere [is_config_true rerere.enabled]
 401         }
 402         if {$rerere} {
 403                 catch {git rerere}
 404         }
 405
 406         # -- Run the post-commit hook.
 407         #
 408         set fd_ph [githook_read post-commit]
 409         if {$fd_ph ne {}} {
 410                 global pch_error
 411                 set pch_error {}
 412                 fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
 413                 fileevent $fd_ph readable \
 414                         [list commit_postcommit_wait $fd_ph $cmt_id]
 415         }
 416
 417         $ui_comm delete 0.0 end
 418         $ui_comm edit reset
 419         $ui_comm edit modified false
 420         if {$::GITGUI_BCK_exists} {
 421                 catch {file delete [gitdir GITGUI_BCK]}
 422                 set ::GITGUI_BCK_exists 0
 423         }
 424
 425         if {[is_enabled singlecommit]} { do_quit 0 }
 426
 427         # -- Update in memory status
 428         #
 429         set selected_commit_type new
 430         set commit_type normal
 431         set HEAD $cmt_id
 432         set PARENT $cmt_id
 433         set MERGE_HEAD [list]
 434
 435         foreach path [array names file_states] {
 436                 set s $file_states($path)
 437                 set m [lindex $s 0]
 438                 switch -glob -- $m {
 439                 _O -
 440                 _M -
 441                 _D {continue}
 442                 __ -
 443                 A_ -
 444                 M_ -
 445                 T_ -
 446                 D_ {
 447                         unset file_states($path)
 448                         catch {unset selected_paths($path)}
 449                 }
 450                 DO {
 451                         set file_states($path) [list _O [lindex $s 1] {} {}]
 452                 }
 453                 AM -
 454                 AD -
 455                 MM -
 456                 MD {
 457                         set file_states($path) [list \
 458                                 _[string index $m 1] \
 459                                 [lindex $s 1] \
 460                                 [lindex $s 3] \
 461                                 {}]
 462                 }
 463                 }
 464         }
 465
 466         display_all_files
 467         unlock_index
 468         reshow_diff
 469         ui_status [mc "Created commit %s: %s" [string range $cmt_id 0 7] $subject]
 470 }
 471
 472 proc commit_postcommit_wait {fd_ph cmt_id} {
 473         global pch_error
 474
 475         append pch_error [read $fd_ph]
 476         fconfigure $fd_ph -blocking 1
 477         if {[eof $fd_ph]} {
 478                 if {[catch {close $fd_ph}]} {
 479                         hook_failed_popup post-commit $pch_error 0
 480                 }
 481                 unset pch_error
 482                 return
 483         }
 484         fconfigure $fd_ph -blocking 0
 485 }