diff options
Diffstat (limited to 'git-gui/lib/mergetool.tcl')
| -rw-r--r-- | git-gui/lib/mergetool.tcl | 373 |
1 files changed, 373 insertions, 0 deletions
diff --git a/git-gui/lib/mergetool.tcl b/git-gui/lib/mergetool.tcl new file mode 100644 index 0000000000..79c58bc7bc --- /dev/null +++ b/git-gui/lib/mergetool.tcl @@ -0,0 +1,373 @@ +# git-gui merge conflict resolution +# parts based on git-mergetool (c) 2006 Theodore Y. Ts'o + +proc merge_resolve_one {stage} { + global current_diff_path + + switch -- $stage { + 1 { set target [mc "the base version"] } + 2 { set target [mc "this branch"] } + 3 { set target [mc "the other branch"] } + } + + set op_question [mc "Force resolution to %s? +Note that the diff shows only conflicting changes. + +%s will be overwritten. + +This operation can be undone only by restarting the merge." \ + $target [short_path $current_diff_path]] + + if {[ask_popup $op_question] eq {yes}} { + merge_load_stages $current_diff_path [list merge_force_stage $stage] + } +} + +proc merge_add_resolution {path} { + global current_diff_path ui_workdir + + set after [next_diff_after_action $ui_workdir $path {} {^_?U}] + + update_index \ + [mc "Adding resolution for %s" [short_path $path]] \ + [list $path] \ + [concat $after [list ui_ready]] +} + +proc merge_force_stage {stage} { + global current_diff_path merge_stages + + if {$merge_stages($stage) ne {}} { + git checkout-index -f --stage=$stage -- $current_diff_path + } else { + file delete -- $current_diff_path + } + + merge_add_resolution $current_diff_path +} + +proc merge_load_stages {path cont} { + global merge_stages_fd merge_stages merge_stages_buf + + if {[info exists merge_stages_fd]} { + catch { kill_file_process $merge_stages_fd } + catch { close $merge_stages_fd } + } + + set merge_stages(0) {} + set merge_stages(1) {} + set merge_stages(2) {} + set merge_stages(3) {} + set merge_stages_buf {} + + set merge_stages_fd [eval git_read ls-files -u -z -- $path] + + fconfigure $merge_stages_fd -blocking 0 -translation binary -encoding binary + fileevent $merge_stages_fd readable [list read_merge_stages $merge_stages_fd $cont] +} + +proc read_merge_stages {fd cont} { + global merge_stages_buf merge_stages_fd merge_stages + + append merge_stages_buf [read $fd] + set pck [split $merge_stages_buf "\0"] + set merge_stages_buf [lindex $pck end] + + if {[eof $fd] && $merge_stages_buf ne {}} { + lappend pck {} + set merge_stages_buf {} + } + + foreach p [lrange $pck 0 end-1] { + set fcols [split $p "\t"] + set cols [split [lindex $fcols 0] " "] + set stage [lindex $cols 2] + + set merge_stages($stage) [lrange $cols 0 1] + } + + if {[eof $fd]} { + close $fd + unset merge_stages_fd + eval $cont + } +} + +proc merge_resolve_tool {} { + global current_diff_path + + merge_load_stages $current_diff_path [list merge_resolve_tool2] +} + +proc merge_resolve_tool2 {} { + global current_diff_path merge_stages + + # Validate the stages + if {$merge_stages(2) eq {} || + [lindex $merge_stages(2) 0] eq {120000} || + [lindex $merge_stages(2) 0] eq {160000} || + $merge_stages(3) eq {} || + [lindex $merge_stages(3) 0] eq {120000} || + [lindex $merge_stages(3) 0] eq {160000} + } { + error_popup [mc "Cannot resolve deletion or link conflicts using a tool"] + return + } + + if {![file exists $current_diff_path]} { + error_popup [mc "Conflict file does not exist"] + return + } + + # Determine the tool to use + set tool [get_config merge.tool] + if {$tool eq {}} { set tool meld } + + set merge_tool_path [get_config "mergetool.$tool.path"] + if {$merge_tool_path eq {}} { + switch -- $tool { + emerge { set merge_tool_path "emacs" } + araxis { set merge_tool_path "compare" } + default { set merge_tool_path $tool } + } + } + + # Make file names + set filebase [file rootname $current_diff_path] + set fileext [file extension $current_diff_path] + set basename [lindex [file split $current_diff_path] end] + + set MERGED $current_diff_path + set BASE "./$MERGED.BASE$fileext" + set LOCAL "./$MERGED.LOCAL$fileext" + set REMOTE "./$MERGED.REMOTE$fileext" + set BACKUP "./$MERGED.BACKUP$fileext" + + set base_stage $merge_stages(1) + + # Build the command line + switch -- $tool { + kdiff3 { + if {$base_stage ne {}} { + set cmdline [list "$merge_tool_path" --auto --L1 "$MERGED (Base)" \ + --L2 "$MERGED (Local)" --L3 "$MERGED (Remote)" -o "$MERGED" "$BASE" "$LOCAL" "$REMOTE"] + } else { + set cmdline [list "$merge_tool_path" --auto --L1 "$MERGED (Local)" \ + --L2 "$MERGED (Remote)" -o "$MERGED" "$LOCAL" "$REMOTE"] + } + } + tkdiff { + if {$base_stage ne {}} { + set cmdline [list "$merge_tool_path" -a "$BASE" -o "$MERGED" "$LOCAL" "$REMOTE"] + } else { + set cmdline [list "$merge_tool_path" -o "$MERGED" "$LOCAL" "$REMOTE"] + } + } + meld { + set cmdline [list "$merge_tool_path" "$LOCAL" "$MERGED" "$REMOTE"] + } + gvimdiff { + set cmdline [list "$merge_tool_path" -f "$LOCAL" "$MERGED" "$REMOTE"] + } + xxdiff { + if {$base_stage ne {}} { + set cmdline [list "$merge_tool_path" -X --show-merged-pane \ + -R {Accel.SaveAsMerged: "Ctrl-S"} \ + -R {Accel.Search: "Ctrl+F"} \ + -R {Accel.SearchForward: "Ctrl-G"} \ + --merged-file "$MERGED" "$LOCAL" "$BASE" "$REMOTE"] + } else { + set cmdline [list "$merge_tool_path" -X --show-merged-pane \ + -R {Accel.SaveAsMerged: "Ctrl-S"} \ + -R {Accel.Search: "Ctrl+F"} \ + -R {Accel.SearchForward: "Ctrl-G"} \ + --merged-file "$MERGED" "$LOCAL" "$REMOTE"] + } + } + opendiff { + if {$base_stage ne {}} { + set cmdline [list "$merge_tool_path" "$LOCAL" "$REMOTE" -ancestor "$BASE" -merge "$MERGED"] + } else { + set cmdline [list "$merge_tool_path" "$LOCAL" "$REMOTE" -merge "$MERGED"] + } + } + ecmerge { + if {$base_stage ne {}} { + set cmdline [list "$merge_tool_path" "$BASE" "$LOCAL" "$REMOTE" --default --mode=merge3 --to="$MERGED"] + } else { + set cmdline [list "$merge_tool_path" "$LOCAL" "$REMOTE" --default --mode=merge2 --to="$MERGED"] + } + } + emerge { + if {$base_stage ne {}} { + set cmdline [list "$merge_tool_path" -f emerge-files-with-ancestor-command \ + "$LOCAL" "$REMOTE" "$BASE" "$basename"] + } else { + set cmdline [list "$merge_tool_path" -f emerge-files-command \ + "$LOCAL" "$REMOTE" "$basename"] + } + } + winmerge { + if {$base_stage ne {}} { + # This tool does not support 3-way merges. + # Use the 'conflict file' resolution feature instead. + set cmdline [list "$merge_tool_path" -e -ub "$MERGED"] + } else { + set cmdline [list "$merge_tool_path" -e -ub -wl \ + -dl "Theirs File" -dr "Mine File" "$REMOTE" "$LOCAL" "$MERGED"] + } + } + araxis { + if {$base_stage ne {}} { + set cmdline [list "$merge_tool_path" -wait -merge -3 -a1 \ + -title1:"'$MERGED (Base)'" -title2:"'$MERGED (Local)'" \ + -title3:"'$MERGED (Remote)'" \ + "$BASE" "$LOCAL" "$REMOTE" "$MERGED"] + } else { + set cmdline [list "$merge_tool_path" -wait -2 \ + -title1:"'$MERGED (Local)'" -title2:"'$MERGED (Remote)'" \ + "$LOCAL" "$REMOTE" "$MERGED"] + } + } + p4merge { + set cmdline [list "$merge_tool_path" "$BASE" "$REMOTE" "$LOCAL" "$MERGED"] + } + vimdiff { + error_popup [mc "Not a GUI merge tool: '%s'" $tool] + return + } + default { + error_popup [mc "Unsupported merge tool '%s'" $tool] + return + } + } + + merge_tool_start $cmdline $MERGED $BACKUP [list $BASE $LOCAL $REMOTE] +} + +proc delete_temp_files {files} { + foreach fname $files { + file delete $fname + } +} + +proc merge_tool_get_stages {target stages} { + global merge_stages + + set i 1 + foreach fname $stages { + if {$merge_stages($i) eq {}} { + file delete $fname + catch { close [open $fname w] } + } else { + # A hack to support autocrlf properly + git checkout-index -f --stage=$i -- $target + file rename -force -- $target $fname + } + incr i + } +} + +proc merge_tool_start {cmdline target backup stages} { + global merge_stages mtool_target mtool_tmpfiles mtool_fd mtool_mtime + + if {[info exists mtool_fd]} { + if {[ask_popup [mc "Merge tool is already running, terminate it?"]] eq {yes}} { + catch { kill_file_process $mtool_fd } + catch { close $mtool_fd } + unset mtool_fd + + set old_backup [lindex $mtool_tmpfiles end] + file rename -force -- $old_backup $mtool_target + delete_temp_files $mtool_tmpfiles + } else { + return + } + } + + # Save the original file + file rename -force -- $target $backup + + # Get the blobs; it destroys $target + if {[catch {merge_tool_get_stages $target $stages} err]} { + file rename -force -- $backup $target + delete_temp_files $stages + error_popup [mc "Error retrieving versions:\n%s" $err] + return + } + + # Restore the conflict file + file copy -force -- $backup $target + + # Initialize global state + set mtool_target $target + set mtool_mtime [file mtime $target] + set mtool_tmpfiles $stages + + lappend mtool_tmpfiles $backup + + # Force redirection to avoid interpreting output on stderr + # as an error, and launch the tool + lappend cmdline {2>@1} + + if {[catch { set mtool_fd [_open_stdout_stderr $cmdline] } err]} { + delete_temp_files $mtool_tmpfiles + error_popup [mc "Could not start the merge tool:\n\n%s" $err] + return + } + + ui_status [mc "Running merge tool..."] + + fconfigure $mtool_fd -blocking 0 -translation binary -encoding binary + fileevent $mtool_fd readable [list read_mtool_output $mtool_fd] +} + +proc read_mtool_output {fd} { + global mtool_fd mtool_tmpfiles + + read $fd + if {[eof $fd]} { + unset mtool_fd + + fconfigure $fd -blocking 1 + merge_tool_finish $fd + } +} + +proc merge_tool_finish {fd} { + global mtool_tmpfiles mtool_target mtool_mtime + + set backup [lindex $mtool_tmpfiles end] + set failed 0 + + # Check the return code + if {[catch {close $fd} err]} { + set failed 1 + if {$err ne {child process exited abnormally}} { + error_popup [strcat [mc "Merge tool failed."] "\n\n$err"] + } + } + + # Check the modification time of the target file + if {!$failed && [file mtime $mtool_target] eq $mtool_mtime} { + if {[ask_popup [mc "File %s unchanged, still accept as resolved?" \ + [short_path $mtool_target]]] ne {yes}} { + set failed 1 + } + } + + # Finish + if {$failed} { + file rename -force -- $backup $mtool_target + delete_temp_files $mtool_tmpfiles + ui_status [mc "Merge tool failed."] + } else { + if {[is_config_true merge.keepbackup]} { + file rename -force -- $backup "$mtool_target.orig" + } + + delete_temp_files $mtool_tmpfiles + + merge_add_resolution $mtool_target + } +} |