# 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 targetquestion [mc "Force resolution to the base version?"] }
2 { set targetquestion [mc "Force resolution to this branch?"] }
3 { set targetquestion [mc "Force resolution to the other branch?"] }
}
set op_question [strcat $targetquestion "\n" \
[mc "Note that the diff shows only conflicting changes.
%s will be overwritten.
This operation can be undone only by restarting the merge." \
[short_path $current_diff_path]]]
if {[ask_popup $op_question] eq {yes}} {
merge_load_stages $current_diff_path [list merge_force_stage $stage]
}
}
proc merge_stage_workdir {path {lno {}}} {
global current_diff_path diff_active
global current_diff_side ui_workdir
if {$diff_active} return
if {$path ne $current_diff_path || $ui_workdir ne $current_diff_side} {
show_diff $path $ui_workdir $lno {} [list do_merge_stage_workdir $path]
} else {
do_merge_stage_workdir $path
}
}
proc do_merge_stage_workdir {path} {
global current_diff_path is_conflict_diff
if {$path ne $current_diff_path} return;
if {$is_conflict_diff} {
if {[ask_popup [mc "File %s seems to have unresolved conflicts, still stage?" \
[short_path $path]]] ne {yes}} {
return
}
}
merge_add_resolution $path
}
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 $after {ui_ready;}]
}
proc merge_force_stage {stage} {
global current_diff_path merge_stages
if {$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 -- $tool {
araxis {
if {$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"]
}
}
bc3 {
if {$base_stage ne {}} {
set cmdline [list "$merge_tool_path" "$LOCAL" "$REMOTE" "$BASE" "-mergeoutput=$MERGED"]
} else {
set cmdline [list "$merge_tool_path" "$LOCAL" "$REMOTE" "-mergeoutput=$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"]
}
}
gvimdiff {
set cmdline [list "$merge_tool_path" -f "$LOCAL" "$MERGED" "$REMOTE"]
}
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" "$REMOTE"]
}
}
meld {
set cmdline [list "$merge_tool_path" "$LOCAL" "$MERGED" "$REMOTE"]
}
opendiff {
if {$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 "$MERGED"]
}
}
p4merge {
set cmdline [list "$merge_tool_path" "$BASE" "$REMOTE" "$LOCAL" "$MERGED"]
}
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"]
}
}
vimdiff {
error_popup [mc "Not a GUI merge tool: '%s'" $tool]
return
}
winmerge {
if {$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"]
}
}
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"]
}
}
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$err"]
}
}
# Finish
if {$failed} {
file rename -force -- $backup $mtool_target
delete_temp_files $mtool_tmpfiles
ui_status [mc "Merge tool failed."]
} else {
if {[is_config_true mergetool.keepbackup]} {
file rename -force -- $backup "$mtool_target.orig"
}
delete_temp_files $mtool_tmpfiles
reshow_diff
}
}
