diff options
Diffstat (limited to 'git-mergetool.sh')
| -rwxr-xr-x | git-mergetool.sh | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/git-mergetool.sh b/git-mergetool.sh new file mode 100755 index 0000000000..e62351bcba --- /dev/null +++ b/git-mergetool.sh @@ -0,0 +1,365 @@ +#!/bin/sh +# +# This program resolves merge conflicts in git +# +# Copyright (c) 2006 Theodore Y. Ts'o +# +# This file is licensed under the GPL v2, or a later version +# at the discretion of Junio C Hammano. +# + +USAGE='[--tool=tool] [file to merge] ...' +SUBDIRECTORY_OK=Yes +. git-sh-setup +require_work_tree + +# Returns true if the mode reflects a symlink +is_symlink () { + test "$1" = 120000 +} + +local_present () { + test -n "$local_mode" +} + +remote_present () { + test -n "$remote_mode" +} + +base_present () { + test -n "$base_mode" +} + +cleanup_temp_files () { + if test "$1" = --save-backup ; then + mv -- "$BACKUP" "$path.orig" + rm -f -- "$LOCAL" "$REMOTE" "$BASE" + else + rm -f -- "$LOCAL" "$REMOTE" "$BASE" "$BACKUP" + fi +} + +describe_file () { + mode="$1" + branch="$2" + file="$3" + + printf " {%s}: " "$branch" + if test -z "$mode"; then + echo "deleted" + elif is_symlink "$mode" ; then + echo "a symbolic link -> '$(cat "$file")'" + else + if base_present; then + echo "modified" + else + echo "created" + fi + fi +} + + +resolve_symlink_merge () { + while true; do + printf "Use (l)ocal or (r)emote, or (a)bort? " + read ans + case "$ans" in + [lL]*) + git-checkout-index -f --stage=2 -- "$path" + git-add -- "$path" + cleanup_temp_files --save-backup + return + ;; + [rR]*) + git-checkout-index -f --stage=3 -- "$path" + git-add -- "$path" + cleanup_temp_files --save-backup + return + ;; + [aA]*) + exit 1 + ;; + esac + done +} + +resolve_deleted_merge () { + while true; do + if base_present; then + printf "Use (m)odified or (d)eleted file, or (a)bort? " + else + printf "Use (c)reated or (d)eleted file, or (a)bort? " + fi + read ans + case "$ans" in + [mMcC]*) + git-add -- "$path" + cleanup_temp_files --save-backup + return + ;; + [dD]*) + git-rm -- "$path" > /dev/null + cleanup_temp_files + return + ;; + [aA]*) + exit 1 + ;; + esac + done +} + +check_unchanged () { + if test "$path" -nt "$BACKUP" ; then + status=0; + else + while true; do + echo "$path seems unchanged." + printf "Was the merge successful? [y/n] " + read answer < /dev/tty + case "$answer" in + y*|Y*) status=0; break ;; + n*|N*) status=1; break ;; + esac + done + fi +} + +save_backup () { + if test "$status" -eq 0; then + mv -- "$BACKUP" "$path.orig" + fi +} + +remove_backup () { + if test "$status" -eq 0; then + rm "$BACKUP" + fi +} + +merge_file () { + path="$1" + + f=`git-ls-files -u -- "$path"` + if test -z "$f" ; then + if test ! -f "$path" ; then + echo "$path: file not found" + else + echo "$path: file does not need merging" + fi + exit 1 + fi + + BACKUP="$path.BACKUP.$$" + LOCAL="$path.LOCAL.$$" + REMOTE="$path.REMOTE.$$" + BASE="$path.BASE.$$" + + mv -- "$path" "$BACKUP" + cp -- "$BACKUP" "$path" + + base_mode=`git ls-files -u -- "$path" | awk '{if ($3==1) print $1;}'` + local_mode=`git ls-files -u -- "$path" | awk '{if ($3==2) print $1;}'` + remote_mode=`git ls-files -u -- "$path" | awk '{if ($3==3) print $1;}'` + + base_present && git cat-file blob ":1:$path" > "$BASE" 2>/dev/null + local_present && git cat-file blob ":2:$path" > "$LOCAL" 2>/dev/null + remote_present && git cat-file blob ":3:$path" > "$REMOTE" 2>/dev/null + + if test -z "$local_mode" -o -z "$remote_mode"; then + echo "Deleted merge conflict for '$path':" + describe_file "$local_mode" "local" "$LOCAL" + describe_file "$remote_mode" "remote" "$REMOTE" + resolve_deleted_merge + return + fi + + if is_symlink "$local_mode" || is_symlink "$remote_mode"; then + echo "Symbolic link merge conflict for '$path':" + describe_file "$local_mode" "local" "$LOCAL" + describe_file "$remote_mode" "remote" "$REMOTE" + resolve_symlink_merge + return + fi + + echo "Normal merge conflict for '$path':" + describe_file "$local_mode" "local" "$LOCAL" + describe_file "$remote_mode" "remote" "$REMOTE" + printf "Hit return to start merge resolution tool (%s): " "$merge_tool" + read ans + + case "$merge_tool" in + kdiff3) + if base_present ; then + (kdiff3 --auto --L1 "$path (Base)" -L2 "$path (Local)" --L3 "$path (Remote)" \ + -o "$path" -- "$BASE" "$LOCAL" "$REMOTE" > /dev/null 2>&1) + else + (kdiff3 --auto -L1 "$path (Local)" --L2 "$path (Remote)" \ + -o "$path" -- "$LOCAL" "$REMOTE" > /dev/null 2>&1) + fi + status=$? + remove_backup + ;; + tkdiff) + if base_present ; then + tkdiff -a "$BASE" -o "$path" -- "$LOCAL" "$REMOTE" + else + tkdiff -o "$path" -- "$LOCAL" "$REMOTE" + fi + status=$? + save_backup + ;; + meld|vimdiff) + touch "$BACKUP" + $merge_tool -- "$LOCAL" "$path" "$REMOTE" + check_unchanged + save_backup + ;; + xxdiff) + touch "$BACKUP" + if base_present ; then + xxdiff -X --show-merged-pane \ + -R 'Accel.SaveAsMerged: "Ctrl-S"' \ + -R 'Accel.Search: "Ctrl+F"' \ + -R 'Accel.SearchForward: "Ctrl-G"' \ + --merged-file "$path" -- "$LOCAL" "$BASE" "$REMOTE" + else + xxdiff -X --show-merged-pane \ + -R 'Accel.SaveAsMerged: "Ctrl-S"' \ + -R 'Accel.Search: "Ctrl+F"' \ + -R 'Accel.SearchForward: "Ctrl-G"' \ + --merged-file "$path" -- "$LOCAL" "$REMOTE" + fi + check_unchanged + save_backup + ;; + opendiff) + touch "$BACKUP" + if base_present; then + opendiff "$LOCAL" "$REMOTE" -ancestor "$BASE" -merge "$path" | cat + else + opendiff "$LOCAL" "$REMOTE" -merge "$path" | cat + fi + check_unchanged + save_backup + ;; + emerge) + if base_present ; then + emacs -f emerge-files-with-ancestor-command "$LOCAL" "$REMOTE" "$BASE" "$path" + else + emacs -f emerge-files-command "$LOCAL" "$REMOTE" "$path" + fi + status=$? + save_backup + ;; + esac + if test "$status" -ne 0; then + echo "merge of $path failed" 1>&2 + mv -- "$BACKUP" "$path" + exit 1 + fi + git add -- "$path" + cleanup_temp_files +} + +while case $# in 0) break ;; esac +do + case "$1" in + -t|--tool*) + case "$#,$1" in + *,*=*) + merge_tool=`expr "z$1" : 'z-[^=]*=\(.*\)'` + ;; + 1,*) + usage ;; + *) + merge_tool="$2" + shift ;; + esac + ;; + --) + break + ;; + -*) + usage + ;; + *) + break + ;; + esac + shift +done + +if test -z "$merge_tool"; then + merge_tool=`git-config merge.tool` + case "$merge_tool" in + kdiff3 | tkdiff | xxdiff | meld | opendiff | emerge | vimdiff | "") + ;; # happy + *) + echo >&2 "git config option merge.tool set to unknown tool: $merge_tool" + echo >&2 "Resetting to default..." + unset merge_tool + ;; + esac +fi + +if test -z "$merge_tool" ; then + if type kdiff3 >/dev/null 2>&1 && test -n "$DISPLAY"; then + merge_tool="kdiff3"; + elif type tkdiff >/dev/null 2>&1 && test -n "$DISPLAY"; then + merge_tool=tkdiff + elif type xxdiff >/dev/null 2>&1 && test -n "$DISPLAY"; then + merge_tool=xxdiff + elif type meld >/dev/null 2>&1 && test -n "$DISPLAY"; then + merge_tool=meld + elif type opendiff >/dev/null 2>&1; then + merge_tool=opendiff + elif type emacs >/dev/null 2>&1; then + merge_tool=emerge + elif type vimdiff >/dev/null 2>&1; then + merge_tool=vimdiff + else + echo "No available merge resolution programs available." + exit 1 + fi +fi + +case "$merge_tool" in + kdiff3|tkdiff|meld|xxdiff|vimdiff|opendiff) + if ! type "$merge_tool" > /dev/null 2>&1; then + echo "The merge tool $merge_tool is not available" + exit 1 + fi + ;; + emerge) + if ! type "emacs" > /dev/null 2>&1; then + echo "Emacs is not available" + exit 1 + fi + ;; + *) + echo "Unknown merge tool: $merge_tool" + exit 1 + ;; +esac + +if test $# -eq 0 ; then + files=`git ls-files -u | sed -e 's/^[^ ]* //' | sort -u` + if test -z "$files" ; then + echo "No files need merging" + exit 0 + fi + echo Merging the files: $files + git ls-files -u | sed -e 's/^[^ ]* //' | sort -u | while read i + do + printf "\n" + merge_file "$i" < /dev/tty > /dev/tty + done +else + while test $# -gt 0; do + printf "\n" + merge_file "$1" + shift + done +fi +exit 0 |