git-gui/lib/merge.tcl

   1 # git-gui branch merge support
   2 # Copyright (C) 2006, 2007 Shawn Pearce
   3
   4 class merge {
   5
   6 field w         ; # top level window
   7 field w_rev     ; # mega-widget to pick the revision to merge
   8
   9 method _can_merge {} {
  10         global HEAD commit_type file_states
  11
  12         if {[string match amend* $commit_type]} {
  13                 info_popup [mc "Cannot merge while amending.
  14
  15 You must finish amending this commit before starting any type of merge.
  16 "]
  17                 return 0
  18         }
  19
  20         if {[committer_ident] eq {}} {return 0}
  21         if {![lock_index merge]} {return 0}
  22
  23         # -- Our in memory state should match the repository.
  24         #
  25         repository_state curType curHEAD curMERGE_HEAD
  26         if {$commit_type ne $curType || $HEAD ne $curHEAD} {
  27                 info_popup [mc "Last scanned state does not match repository state.
  28
  29 Another Git program has modified this repository since the last scan.  A rescan must be performed before a merge can be performed.
  30
  31 The rescan will be automatically started now.
  32 "]
  33                 unlock_index
  34                 rescan ui_ready
  35                 return 0
  36         }
  37
  38         foreach path [array names file_states] {
  39                 switch -glob -- [lindex $file_states($path) 0] {
  40                 _O {
  41                         continue; # and pray it works!
  42                 }
  43                 _U -
  44                 U? {
  45                         error_popup [mc "You are in the middle of a conflicted merge.
  46
  47 File %s has merge conflicts.
  48
  49 You must resolve them, stage the file, and commit to complete the current merge.  Only then can you begin another merge.
  50 " [short_path $path]]
  51                         unlock_index
  52                         return 0
  53                 }
  54                 ?? {
  55                         error_popup [mc "You are in the middle of a change.
  56
  57 File %s is modified.
  58
  59 You should complete the current commit before starting a merge.  Doing so will help you abort a failed merge, should the need arise.
  60 " [short_path $path]]
  61                         unlock_index
  62                         return 0
  63                 }
  64                 }
  65         }
  66
  67         return 1
  68 }
  69
  70 method _rev {} {
  71         if {[catch {$w_rev commit_or_die}]} {
  72                 return {}
  73         }
  74         return [$w_rev get]
  75 }
  76
  77 method _visualize {} {
  78         set rev [_rev $this]
  79         if {$rev ne {}} {
  80                 do_gitk [list $rev --not HEAD]
  81         }
  82 }
  83
  84 method _start {} {
  85         global HEAD current_branch remote_url
  86         global _last_merged_branch
  87
  88         set name [_rev $this]
  89         if {$name eq {}} {
  90                 return
  91         }
  92
  93         set spec [$w_rev get_tracking_branch]
  94         set cmit [$w_rev get_commit]
  95
  96         set fh [open [gitdir FETCH_HEAD] w]
  97         fconfigure $fh -translation lf
  98         if {$spec eq {}} {
  99                 set remote .
 100                 set branch $name
 101                 set stitle $branch
 102         } else {
 103                 set remote $remote_url([lindex $spec 1])
 104                 if {[regexp {^[^:@]*@[^:]*:/} $remote]} {
 105                         regsub {^[^:@]*@} $remote {} remote
 106                 }
 107                 set branch [lindex $spec 2]
 108                 set stitle [mc "%s of %s" $branch $remote]
 109         }
 110         regsub ^refs/heads/ $branch {} branch
 111         puts $fh "$cmit\t\tbranch '$branch' of $remote"
 112         close $fh
 113         set _last_merged_branch $branch
 114
 115         if {[git-version >= "2.5.0"]} {
 116                 set cmd [list git merge --strategy=recursive FETCH_HEAD]
 117         } else {
 118                 set cmd [list git]
 119                 lappend cmd merge
 120                 lappend cmd --strategy=recursive
 121                 lappend cmd [git fmt-merge-msg <[gitdir FETCH_HEAD]]
 122                 lappend cmd HEAD
 123                 lappend cmd $name
 124         }
 125
 126         ui_status [mc "Merging %s and %s..." $current_branch $stitle]
 127         set cons [console::new [mc "Merge"] "merge $stitle"]
 128         console::exec $cons $cmd [cb _finish $cons]
 129
 130         wm protocol $w WM_DELETE_WINDOW {}
 131         destroy $w
 132 }
 133
 134 method _finish {cons ok} {
 135         console::done $cons $ok
 136         if {$ok} {
 137                 set msg [mc "Merge completed successfully."]
 138         } else {
 139                 set msg [mc "Merge failed.  Conflict resolution is required."]
 140         }
 141         unlock_index
 142         rescan [list ui_status $msg]
 143         delete_this
 144 }
 145
 146 constructor dialog {} {
 147         global current_branch
 148         global M1B use_ttk NS
 149
 150         if {![_can_merge $this]} {
 151                 delete_this
 152                 return
 153         }
 154
 155         make_dialog top w
 156         wm title $top [mc "%s (%s): Merge" [appname] [reponame]]
 157         if {$top ne {.}} {
 158                 wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
 159         }
 160
 161         set _start [cb _start]
 162
 163         ${NS}::label $w.header \
 164                 -text [mc "Merge Into %s" $current_branch] \
 165                 -font font_uibold
 166         pack $w.header -side top -fill x
 167
 168         ${NS}::frame $w.buttons
 169         ${NS}::button $w.buttons.visualize \
 170                 -text [mc Visualize] \
 171                 -command [cb _visualize]
 172         pack $w.buttons.visualize -side left
 173         ${NS}::button $w.buttons.merge \
 174                 -text [mc Merge] \
 175                 -command $_start
 176         pack $w.buttons.merge -side right
 177         ${NS}::button $w.buttons.cancel \
 178                 -text [mc "Cancel"] \
 179                 -command [cb _cancel]
 180         pack $w.buttons.cancel -side right -padx 5
 181         pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 182
 183         set w_rev [::choose_rev::new_unmerged $w.rev [mc "Revision To Merge"]]
 184         pack $w.rev -anchor nw -fill both -expand 1 -pady 5 -padx 5
 185
 186         bind $w <$M1B-Key-Return> $_start
 187         bind $w <Key-Return> $_start
 188         bind $w <Key-Escape> [cb _cancel]
 189         wm protocol $w WM_DELETE_WINDOW [cb _cancel]
 190
 191         bind $w.buttons.merge <Visibility> [cb _visible]
 192         tkwait window $w
 193 }
 194
 195 method _visible {} {
 196         grab $w
 197         if {[is_config_true gui.matchtrackingbranch]} {
 198                 $w_rev pick_tracking_branch
 199         }
 200         $w_rev focus_filter
 201 }
 202
 203 method _cancel {} {
 204         wm protocol $w WM_DELETE_WINDOW {}
 205         unlock_index
 206         destroy $w
 207         delete_this
 208 }
 209
 210 }
 211
 212 namespace eval merge {
 213
 214 proc reset_hard {} {
 215         global HEAD commit_type file_states
 216
 217         if {[string match amend* $commit_type]} {
 218                 info_popup [mc "Cannot abort while amending.
 219
 220 You must finish amending this commit.
 221 "]
 222                 return
 223         }
 224
 225         if {![lock_index abort]} return
 226
 227         if {[string match *merge* $commit_type]} {
 228                 set op_question [mc "Abort merge?
 229
 230 Aborting the current merge will cause *ALL* uncommitted changes to be lost.
 231
 232 Continue with aborting the current merge?"]
 233         } else {
 234                 set op_question [mc "Reset changes?
 235
 236 Resetting the changes will cause *ALL* uncommitted changes to be lost.
 237
 238 Continue with resetting the current changes?"]
 239         }
 240
 241         if {[ask_popup $op_question] eq {yes}} {
 242                 set fd [git_read --stderr read-tree --reset -u -v HEAD]
 243                 fconfigure $fd -blocking 0 -translation binary
 244                 fileevent $fd readable [namespace code [list _reset_wait $fd]]
 245                 $::main_status start [mc "Aborting"] [mc "files reset"]
 246         } else {
 247                 unlock_index
 248         }
 249 }
 250
 251 proc _reset_wait {fd} {
 252         global ui_comm
 253
 254         $::main_status update_meter [read $fd]
 255
 256         fconfigure $fd -blocking 1
 257         if {[eof $fd]} {
 258                 set fail [catch {close $fd} err]
 259                 $::main_status stop
 260                 unlock_index
 261
 262                 $ui_comm delete 0.0 end
 263                 $ui_comm edit modified false
 264
 265                 catch {file delete [gitdir MERGE_HEAD]}
 266                 catch {file delete [gitdir rr-cache MERGE_RR]}
 267                 catch {file delete [gitdir MERGE_RR]}
 268                 catch {file delete [gitdir SQUASH_MSG]}
 269                 catch {file delete [gitdir MERGE_MSG]}
 270                 catch {file delete [gitdir GITGUI_MSG]}
 271
 272                 if {$fail} {
 273                         warn_popup "[mc "Abort failed."]\n\n$err"
 274                 }
 275                 rescan {ui_status [mc "Abort completed.  Ready."]}
 276         } else {
 277                 fconfigure $fd -blocking 0
 278         }
 279 }
 280
 281 }