mergetool: use $( ... ) instead of `backticks`
[git.git] / git-mergetool.sh
index fcdec4a504acd5681e0695fb9657d6a1cd513ab0..cceebb72103033927a520415203a23f89fa0c5d0 100755 (executable)
@@ -8,12 +8,11 @@
 # at the discretion of Junio C Hamano.
 #
 
-USAGE='[--tool=tool] [file to merge] ...'
+USAGE='[--tool=tool] [-y|--no-prompt|--prompt] [file to merge] ...'
 SUBDIRECTORY_OK=Yes
 OPTIONS_SPEC=
 . git-sh-setup
 require_work_tree
-prefix=$(git rev-parse --show-prefix)
 
 # Returns true if the mode reflects a symlink
 is_symlink () {
@@ -70,16 +69,16 @@ resolve_symlink_merge () {
                git checkout-index -f --stage=2 -- "$MERGED"
                git add -- "$MERGED"
                cleanup_temp_files --save-backup
-               return
+               return 0
                ;;
            [rR]*)
                git checkout-index -f --stage=3 -- "$MERGED"
                git add -- "$MERGED"
                cleanup_temp_files --save-backup
-               return
+               return 0
                ;;
            [aA]*)
-               exit 1
+               return 1
                ;;
            esac
        done
@@ -97,15 +96,15 @@ resolve_deleted_merge () {
            [mMcC]*)
                git add -- "$MERGED"
                cleanup_temp_files --save-backup
-               return
+               return 0
                ;;
            [dD]*)
                git rm -- "$MERGED" > /dev/null
                cleanup_temp_files
-               return
+               return 0
                ;;
            [aA]*)
-               exit 1
+               return 1
                ;;
            esac
        done
@@ -127,35 +126,43 @@ check_unchanged () {
     fi
 }
 
+checkout_staged_file () {
+    tmpfile=$(expr "$(git checkout-index --temp --stage="$1" "$2")" : '\([^    ]*\)    ')
+
+    if test $? -eq 0 -a -n "$tmpfile" ; then
+       mv -- "$(git rev-parse --show-cdup)$tmpfile" "$3"
+    fi
+}
+
 merge_file () {
     MERGED="$1"
 
-    f=`git ls-files -u -- "$MERGED"`
+    f=$(git ls-files -u -- "$MERGED")
     if test -z "$f" ; then
        if test ! -f "$MERGED" ; then
            echo "$MERGED: file not found"
        else
            echo "$MERGED: file does not need merging"
        fi
-       exit 1
+       return 1
     fi
 
     ext="$$$(expr "$MERGED" : '.*\(\.[^/]*\)$')"
-    BACKUP="$MERGED.BACKUP.$ext"
-    LOCAL="$MERGED.LOCAL.$ext"
-    REMOTE="$MERGED.REMOTE.$ext"
-    BASE="$MERGED.BASE.$ext"
+    BACKUP="./$MERGED.BACKUP.$ext"
+    LOCAL="./$MERGED.LOCAL.$ext"
+    REMOTE="./$MERGED.REMOTE.$ext"
+    BASE="./$MERGED.BASE.$ext"
 
     mv -- "$MERGED" "$BACKUP"
     cp -- "$BACKUP" "$MERGED"
 
-    base_mode=`git ls-files -u -- "$MERGED" | awk '{if ($3==1) print $1;}'`
-    local_mode=`git ls-files -u -- "$MERGED" | awk '{if ($3==2) print $1;}'`
-    remote_mode=`git ls-files -u -- "$MERGED" | awk '{if ($3==3) print $1;}'`
+    base_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==1) print $1;}')
+    local_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==2) print $1;}')
+    remote_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==3) print $1;}')
 
-    base_present   && git cat-file blob ":1:$prefix$MERGED" >"$BASE" 2>/dev/null
-    local_present  && git cat-file blob ":2:$prefix$MERGED" >"$LOCAL" 2>/dev/null
-    remote_present && git cat-file blob ":3:$prefix$MERGED" >"$REMOTE" 2>/dev/null
+    base_present   && checkout_staged_file 1 "$MERGED" "$BASE"
+    local_present  && checkout_staged_file 2 "$MERGED" "$LOCAL"
+    remote_present && checkout_staged_file 3 "$MERGED" "$REMOTE"
 
     if test -z "$local_mode" -o -z "$remote_mode"; then
        echo "Deleted merge conflict for '$MERGED':"
@@ -176,36 +183,43 @@ merge_file () {
     echo "Normal merge conflict for '$MERGED':"
     describe_file "$local_mode" "local" "$LOCAL"
     describe_file "$remote_mode" "remote" "$REMOTE"
-    printf "Hit return to start merge resolution tool (%s): " "$merge_tool"
-    read ans
+    if "$prompt" = true; then
+       printf "Hit return to start merge resolution tool (%s): " "$merge_tool"
+       read ans
+    fi
 
     case "$merge_tool" in
        kdiff3)
            if base_present ; then
                ("$merge_tool_path" --auto --L1 "$MERGED (Base)" --L2 "$MERGED (Local)" --L3 "$MERGED (Remote)" \
-                   -o "$MERGED" -- "$BASE" "$LOCAL" "$REMOTE" > /dev/null 2>&1)
+                   -o "$MERGED" "$BASE" "$LOCAL" "$REMOTE" > /dev/null 2>&1)
            else
                ("$merge_tool_path" --auto --L1 "$MERGED (Local)" --L2 "$MERGED (Remote)" \
-                   -o "$MERGED" -- "$LOCAL" "$REMOTE" > /dev/null 2>&1)
+                   -o "$MERGED" "$LOCAL" "$REMOTE" > /dev/null 2>&1)
            fi
            status=$?
            ;;
        tkdiff)
            if base_present ; then
-               "$merge_tool_path" -a "$BASE" -o "$MERGED" -- "$LOCAL" "$REMOTE"
+               "$merge_tool_path" -a "$BASE" -o "$MERGED" "$LOCAL" "$REMOTE"
            else
-               "$merge_tool_path" -o "$MERGED" -- "$LOCAL" "$REMOTE"
+               "$merge_tool_path" -o "$MERGED" "$LOCAL" "$REMOTE"
            fi
            status=$?
            ;;
-       meld|vimdiff)
+       meld)
+           touch "$BACKUP"
+           "$merge_tool_path" "$LOCAL" "$MERGED" "$REMOTE"
+           check_unchanged
+           ;;
+       vimdiff)
            touch "$BACKUP"
-           "$merge_tool_path" -- "$LOCAL" "$MERGED" "$REMOTE"
+           "$merge_tool_path" -d -c "wincmd l" "$LOCAL" "$MERGED" "$REMOTE"
            check_unchanged
            ;;
        gvimdiff)
            touch "$BACKUP"
-           "$merge_tool_path" -f -- "$LOCAL" "$MERGED" "$REMOTE"
+           "$merge_tool_path" -d -c "wincmd l" -f "$LOCAL" "$MERGED" "$REMOTE"
            check_unchanged
            ;;
        xxdiff)
@@ -215,13 +229,13 @@ merge_file () {
                    -R 'Accel.SaveAsMerged: "Ctrl-S"' \
                    -R 'Accel.Search: "Ctrl+F"' \
                    -R 'Accel.SearchForward: "Ctrl-G"' \
-                   --merged-file "$MERGED" -- "$LOCAL" "$BASE" "$REMOTE"
+                   --merged-file "$MERGED" "$LOCAL" "$BASE" "$REMOTE"
            else
                "$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" "$REMOTE"
+                   --merged-file "$MERGED" "$LOCAL" "$REMOTE"
            fi
            check_unchanged
            ;;
@@ -251,6 +265,16 @@ merge_file () {
            fi
            status=$?
            ;;
+       tortoisemerge)
+           if base_present ; then
+               touch "$BACKUP"
+               "$merge_tool_path" -base:"$BASE" -mine:"$LOCAL" -theirs:"$REMOTE" -merged:"$MERGED"
+               check_unchanged
+           else
+               echo "TortoiseMerge cannot be used without a base" 1>&2
+               status=1
+           fi
+           ;;
        *)
            if test -n "$merge_tool_cmd"; then
                if test "$merge_tool_trust_exit_code" = "false"; then
@@ -267,7 +291,12 @@ merge_file () {
     if test "$status" -ne 0; then
        echo "merge of $MERGED failed" 1>&2
        mv -- "$BACKUP" "$MERGED"
-       exit 1
+
+       if test "$merge_keep_temporaries" = "false"; then
+           cleanup_temp_files
+       fi
+
+       return 1
     fi
 
     if test "$merge_keep_backup" = "true"; then
@@ -278,15 +307,18 @@ merge_file () {
 
     git add -- "$MERGED"
     cleanup_temp_files
+    return 0
 }
 
+prompt=$(git config --bool mergetool.prompt || echo true)
+
 while test $# != 0
 do
     case "$1" in
        -t|--tool*)
            case "$#,$1" in
                *,*=*)
-                   merge_tool=`expr "z$1" : 'z-[^=]*=\(.*\)'`
+                   merge_tool=$(expr "z$1" : 'z-[^=]*=\(.*\)')
                    ;;
                1,*)
                    usage ;;
@@ -295,7 +327,14 @@ do
                    shift ;;
            esac
            ;;
+       -y|--no-prompt)
+           prompt=false
+           ;;
+       --prompt)
+           prompt=true
+           ;;
        --)
+           shift
            break
            ;;
        -*)
@@ -316,7 +355,7 @@ valid_custom_tool()
 
 valid_tool() {
        case "$1" in
-               kdiff3 | tkdiff | xxdiff | meld | opendiff | emerge | vimdiff | gvimdiff | ecmerge)
+               kdiff3 | tkdiff | xxdiff | meld | opendiff | emerge | vimdiff | gvimdiff | ecmerge | tortoisemerge)
                        ;; # happy
                *)
                        if ! valid_custom_tool "$1"; then
@@ -327,9 +366,15 @@ valid_tool() {
 }
 
 init_merge_tool_path() {
-       merge_tool_path=`git config mergetool.$1.path`
+       merge_tool_path=$(git config mergetool.$1.path)
        if test -z "$merge_tool_path" ; then
                case "$1" in
+                       vimdiff)
+                               merge_tool_path=vim
+                               ;;
+                       gvimdiff)
+                               merge_tool_path=gvim
+                               ;;
                        emerge)
                                merge_tool_path=emacs
                                ;;
@@ -340,9 +385,25 @@ init_merge_tool_path() {
        fi
 }
 
+prompt_after_failed_merge() {
+    while true; do
+       printf "Continue merging other unresolved paths (y/n) ? "
+       read ans
+       case "$ans" in
+
+           [yY]*)
+               return 0
+               ;;
+
+           [nN]*)
+               return 1
+               ;;
+       esac
+    done
+}
 
 if test -z "$merge_tool"; then
-    merge_tool=`git config merge.tool`
+    merge_tool=$(git config merge.tool)
     if test -n "$merge_tool" && ! valid_tool "$merge_tool"; then
            echo >&2 "git config option merge.tool set to unknown tool: $merge_tool"
            echo >&2 "Resetting to default..."
@@ -352,21 +413,19 @@ fi
 
 if test -z "$merge_tool" ; then
     if test -n "$DISPLAY"; then
-        merge_tool_candidates="kdiff3 tkdiff xxdiff meld gvimdiff"
         if test -n "$GNOME_DESKTOP_SESSION_ID" ; then
-            merge_tool_candidates="meld $merge_tool_candidates"
-        fi
-        if test "$KDE_FULL_SESSION" = "true"; then
-            merge_tool_candidates="kdiff3 $merge_tool_candidates"
+            merge_tool_candidates="meld kdiff3 tkdiff xxdiff tortoisemerge gvimdiff diffuse"
+        else
+            merge_tool_candidates="kdiff3 tkdiff xxdiff meld tortoisemerge gvimdiff diffuse"
         fi
     fi
     if echo "${VISUAL:-$EDITOR}" | grep 'emacs' > /dev/null 2>&1; then
-        merge_tool_candidates="$merge_tool_candidates emerge"
-    fi
-    if echo "${VISUAL:-$EDITOR}" | grep 'vim' > /dev/null 2>&1; then
-        merge_tool_candidates="$merge_tool_candidates vimdiff"
+        merge_tool_candidates="$merge_tool_candidates emerge opendiff vimdiff"
+    elif echo "${VISUAL:-$EDITOR}" | grep 'vim' > /dev/null 2>&1; then
+        merge_tool_candidates="$merge_tool_candidates vimdiff opendiff emerge"
+    else
+        merge_tool_candidates="$merge_tool_candidates opendiff emerge vimdiff"
     fi
-    merge_tool_candidates="$merge_tool_candidates opendiff emerge vimdiff"
     echo "merge tool candidates: $merge_tool_candidates"
     for i in $merge_tool_candidates; do
         init_merge_tool_path $i
@@ -388,6 +447,7 @@ else
     init_merge_tool_path "$merge_tool"
 
     merge_keep_backup="$(git config --bool merge.keepBackup || echo true)"
+    merge_keep_temporaries="$(git config --bool mergetool.keepTemporaries || echo false)"
 
     if test -z "$merge_tool_cmd" && ! type "$merge_tool_path" > /dev/null 2>&1; then
         echo "The merge tool $merge_tool is not available as '$merge_tool_path'"
@@ -399,27 +459,44 @@ else
     fi
 fi
 
+last_status=0
+rollup_status=0
 
 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
+    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 IFS= read i
+    do
+       if test $last_status -ne 0; then
+           prompt_after_failed_merge < /dev/tty || exit 1
        fi
-       echo Merging the files: "$files"
-       git ls-files -u |
-       sed -e 's/^[^   ]*      //' |
-       sort -u |
-       while IFS= read i
-       do
-               printf "\n"
-               merge_file "$i" < /dev/tty > /dev/tty
-       done
+       printf "\n"
+       merge_file "$i" < /dev/tty > /dev/tty
+       last_status=$?
+       if test $last_status -ne 0; then
+           rollup_status=1
+       fi
+    done
 else
-       while test $# -gt 0; do
-               printf "\n"
-               merge_file "$1"
-               shift
-       done
+    while test $# -gt 0; do
+       if test $last_status -ne 0; then
+           prompt_after_failed_merge || exit 1
+       fi
+       printf "\n"
+       merge_file "$1"
+       last_status=$?
+       if test $last_status -ne 0; then
+           rollup_status=1
+       fi
+       shift
+    done
 fi
-exit 0
+
+exit $rollup_status