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-rw-r--r--git-mergetool--lib.sh378
1 files changed, 378 insertions, 0 deletions
diff --git a/git-mergetool--lib.sh b/git-mergetool--lib.sh
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+# git-mergetool--lib is a library for common merge tool functions
+diff_mode() {
+ test "$TOOL_MODE" = diff
+}
+
+merge_mode() {
+ test "$TOOL_MODE" = merge
+}
+
+translate_merge_tool_path () {
+ if test -n "$2"; then
+ echo "$2"
+ else
+ case "$1" in
+ vimdiff)
+ path=vim
+ ;;
+ gvimdiff)
+ path=gvim
+ ;;
+ emerge)
+ path=emacs
+ ;;
+ *)
+ path="$1"
+ ;;
+ esac
+ echo "$path"
+ fi
+}
+
+check_unchanged () {
+ if test "$MERGED" -nt "$BACKUP"; then
+ status=0
+ else
+ while true; do
+ echo "$MERGED seems unchanged."
+ printf "Was the merge successful? [y/n] "
+ read answer < /dev/tty
+ case "$answer" in
+ y*|Y*) status=0; break ;;
+ n*|N*) status=1; break ;;
+ esac
+ done
+ fi
+}
+
+valid_tool () {
+ case "$1" in
+ kdiff3 | tkdiff | xxdiff | meld | opendiff | \
+ emerge | vimdiff | gvimdiff | ecmerge | diffuse)
+ ;; # happy
+ tortoisemerge)
+ if ! merge_mode; then
+ return 1
+ fi
+ ;;
+ kompare)
+ if ! diff_mode; then
+ return 1
+ fi
+ ;;
+ *)
+ if test -z "$(get_merge_tool_cmd "$1")"; then
+ return 1
+ fi
+ ;;
+ esac
+}
+
+get_merge_tool_cmd () {
+ diff_mode &&
+ custom_cmd="$(git config difftool.$1.cmd)"
+ test -z "$custom_cmd" &&
+ custom_cmd="$(git config mergetool.$1.cmd)"
+ test -n "$custom_cmd" &&
+ echo "$custom_cmd"
+}
+
+run_merge_tool () {
+ base_present="$2"
+ status=0
+
+ case "$1" in
+ kdiff3)
+ if merge_mode; then
+ if $base_present; then
+ ("$merge_tool_path" --auto \
+ --L1 "$MERGED (Base)" \
+ --L2 "$MERGED (Local)" \
+ --L3 "$MERGED (Remote)" \
+ -o "$MERGED" \
+ "$BASE" "$LOCAL" "$REMOTE" \
+ > /dev/null 2>&1)
+ else
+ ("$merge_tool_path" --auto \
+ --L1 "$MERGED (Local)" \
+ --L2 "$MERGED (Remote)" \
+ -o "$MERGED" \
+ "$LOCAL" "$REMOTE" \
+ > /dev/null 2>&1)
+ fi
+ status=$?
+ else
+ ("$merge_tool_path" --auto \
+ --L1 "$MERGED (A)" \
+ --L2 "$MERGED (B)" "$LOCAL" "$REMOTE" \
+ > /dev/null 2>&1)
+ fi
+ ;;
+ kompare)
+ "$merge_tool_path" "$LOCAL" "$REMOTE"
+ ;;
+ tkdiff)
+ if merge_mode; then
+ if $base_present; then
+ "$merge_tool_path" -a "$BASE" \
+ -o "$MERGED" "$LOCAL" "$REMOTE"
+ else
+ "$merge_tool_path" \
+ -o "$MERGED" "$LOCAL" "$REMOTE"
+ fi
+ status=$?
+ else
+ "$merge_tool_path" "$LOCAL" "$REMOTE"
+ fi
+ ;;
+ meld)
+ if merge_mode; then
+ touch "$BACKUP"
+ "$merge_tool_path" "$LOCAL" "$MERGED" "$REMOTE"
+ check_unchanged
+ else
+ "$merge_tool_path" "$LOCAL" "$REMOTE"
+ fi
+ ;;
+ diffuse)
+ if merge_mode; then
+ touch "$BACKUP"
+ if $base_present; then
+ "$merge_tool_path" \
+ "$LOCAL" "$MERGED" "$REMOTE" \
+ "$BASE" | cat
+ else
+ "$merge_tool_path" \
+ "$LOCAL" "$MERGED" "$REMOTE" | cat
+ fi
+ check_unchanged
+ else
+ "$merge_tool_path" "$LOCAL" "$REMOTE" | cat
+ fi
+ ;;
+ vimdiff)
+ if merge_mode; then
+ touch "$BACKUP"
+ "$merge_tool_path" -d -c "wincmd l" \
+ "$LOCAL" "$MERGED" "$REMOTE"
+ check_unchanged
+ else
+ "$merge_tool_path" -d -c "wincmd l" \
+ "$LOCAL" "$REMOTE"
+ fi
+ ;;
+ gvimdiff)
+ if merge_mode; then
+ touch "$BACKUP"
+ "$merge_tool_path" -d -c "wincmd l" -f \
+ "$LOCAL" "$MERGED" "$REMOTE"
+ check_unchanged
+ else
+ "$merge_tool_path" -d -c "wincmd l" -f \
+ "$LOCAL" "$REMOTE"
+ fi
+ ;;
+ xxdiff)
+ if merge_mode; then
+ touch "$BACKUP"
+ if $base_present; then
+ "$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
+ "$merge_tool_path" -X $extra \
+ -R 'Accel.SaveAsMerged: "Ctrl-S"' \
+ -R 'Accel.Search: "Ctrl+F"' \
+ -R 'Accel.SearchForward: "Ctrl-G"' \
+ --merged-file "$MERGED" \
+ "$LOCAL" "$REMOTE"
+ fi
+ check_unchanged
+ else
+ "$merge_tool_path" \
+ -R 'Accel.Search: "Ctrl+F"' \
+ -R 'Accel.SearchForward: "Ctrl-G"' \
+ "$LOCAL" "$REMOTE"
+ fi
+ ;;
+ opendiff)
+ if merge_mode; then
+ touch "$BACKUP"
+ if $base_present; then
+ "$merge_tool_path" "$LOCAL" "$REMOTE" \
+ -ancestor "$BASE" \
+ -merge "$MERGED" | cat
+ else
+ "$merge_tool_path" "$LOCAL" "$REMOTE" \
+ -merge "$MERGED" | cat
+ fi
+ check_unchanged
+ else
+ "$merge_tool_path" "$LOCAL" "$REMOTE" | cat
+ fi
+ ;;
+ ecmerge)
+ if merge_mode; then
+ touch "$BACKUP"
+ if $base_present; then
+ "$merge_tool_path" "$BASE" "$LOCAL" "$REMOTE" \
+ --default --mode=merge3 --to="$MERGED"
+ else
+ "$merge_tool_path" "$LOCAL" "$REMOTE" \
+ --default --mode=merge2 --to="$MERGED"
+ fi
+ check_unchanged
+ else
+ "$merge_tool_path" "$LOCAL" "$REMOTE" \
+ --default --mode=merge2 --to="$MERGED"
+ fi
+ ;;
+ emerge)
+ if merge_mode; then
+ if $base_present; then
+ "$merge_tool_path" \
+ -f emerge-files-with-ancestor-command \
+ "$LOCAL" "$REMOTE" "$BASE" \
+ "$(basename "$MERGED")"
+ else
+ "$merge_tool_path" \
+ -f emerge-files-command \
+ "$LOCAL" "$REMOTE" \
+ "$(basename "$MERGED")"
+ fi
+ status=$?
+ else
+ "$merge_tool_path" -f emerge-files-command \
+ "$LOCAL" "$REMOTE" "$(basename "$MERGED")"
+ fi
+ ;;
+ tortoisemerge)
+ if $base_present; then
+ touch "$BACKUP"
+ "$merge_tool_path" \
+ -base:"$BASE" -mine:"$LOCAL" \
+ -theirs:"$REMOTE" -merged:"$MERGED"
+ check_unchanged
+ else
+ echo "TortoiseMerge cannot be used without a base" 1>&2
+ status=1
+ fi
+ ;;
+ *)
+ if test -z "$merge_tool_cmd"; then
+ if merge_mode; then
+ status=1
+ fi
+ break
+ fi
+ if merge_mode; then
+ if test "$merge_tool_trust_exit_code" = "false"; then
+ touch "$BACKUP"
+ ( eval $merge_tool_cmd )
+ check_unchanged
+ else
+ ( eval $merge_tool_cmd )
+ status=$?
+ fi
+ else
+ ( eval $merge_tool_cmd )
+ fi
+ ;;
+ esac
+ return $status
+}
+
+guess_merge_tool () {
+ if merge_mode; then
+ tools="tortoisemerge"
+ else
+ tools="kompare"
+ fi
+ if test -n "$DISPLAY"; then
+ if test -n "$GNOME_DESKTOP_SESSION_ID" ; then
+ tools="meld opendiff kdiff3 tkdiff xxdiff $tools"
+ else
+ tools="opendiff kdiff3 tkdiff xxdiff meld $tools"
+ fi
+ tools="$tools gvimdiff diffuse ecmerge"
+ fi
+ if echo "${VISUAL:-$EDITOR}" | grep emacs > /dev/null 2>&1; then
+ # $EDITOR is emacs so add emerge as a candidate
+ tools="$tools emerge vimdiff"
+ elif echo "${VISUAL:-$EDITOR}" | grep vim > /dev/null 2>&1; then
+ # $EDITOR is vim so add vimdiff as a candidate
+ tools="$tools vimdiff emerge"
+ else
+ tools="$tools emerge vimdiff"
+ fi
+ echo >&2 "merge tool candidates: $tools"
+
+ # Loop over each candidate and stop when a valid merge tool is found.
+ for i in $tools
+ do
+ merge_tool_path="$(translate_merge_tool_path "$i")"
+ if type "$merge_tool_path" > /dev/null 2>&1; then
+ merge_tool="$i"
+ break
+ fi
+ done
+
+ if test -z "$merge_tool" ; then
+ echo >&2 "No known merge resolution program available."
+ return 1
+ fi
+ echo "$merge_tool"
+}
+
+get_configured_merge_tool () {
+ # Diff mode first tries diff.tool and falls back to merge.tool.
+ # Merge mode only checks merge.tool
+ if diff_mode; then
+ tool=$(git config diff.tool)
+ fi
+ if test -z "$tool"; then
+ tool=$(git config merge.tool)
+ fi
+ if test -n "$merge_tool" && ! valid_tool "$merge_tool"; then
+ echo >&2 "git config option $TOOL_MODE.tool set to unknown tool: $merge_tool"
+ echo >&2 "Resetting to default..."
+ return 1
+ fi
+ echo "$tool"
+}
+
+get_merge_tool_path () {
+ # A merge tool has been set, so verify that it's valid.
+ if ! valid_tool "$merge_tool"; then
+ echo >&2 "Unknown merge tool $merge_tool"
+ exit 1
+ fi
+ if diff_mode; then
+ merge_tool_path=$(git config difftool."$merge_tool".path)
+ fi
+ if test -z "$merge_tool_path"; then
+ merge_tool_path=$(git config mergetool."$merge_tool".path)
+ fi
+ merge_tool_path="$(translate_merge_tool_path "$merge_tool" "$merge_tool_path")"
+ if test -z "$merge_tool_cmd" && ! type "$merge_tool_path" > /dev/null 2>&1; then
+ echo >&2 "The $TOOL_MODE tool $merge_tool is not available as '$merge_tool_path'"
+ exit 1
+ fi
+ echo "$merge_tool_path"
+}
+
+get_merge_tool () {
+ merge_tool="$1"
+ # Check if a merge tool has been configured
+ if test -z "$merge_tool"; then
+ merge_tool=$(get_configured_merge_tool)
+ fi
+ # Try to guess an appropriate merge tool if no tool has been set.
+ if test -z "$merge_tool"; then
+ merge_tool=$(guess_merge_tool) || exit
+ fi
+ echo "$merge_tool"
+}