var doc: advertise current DEFAULT_PAGER and DEFAULT_EDITOR settings
[gitweb.git] / git-mergetool.sh
index b52a7410bcb7b37dce0f4d6213dddedd2c1e42e7..085e213a126e5864befc8e3436832ae3c587a624 100755 (executable)
@@ -21,6 +21,10 @@ is_symlink () {
     test "$1" = 120000
 }
 
+is_submodule () {
+    test "$1" = 160000
+}
+
 local_present () {
     test -n "$local_mode"
 }
@@ -35,7 +39,8 @@ base_present () {
 
 cleanup_temp_files () {
     if test "$1" = --save-backup ; then
-       mv -- "$BACKUP" "$MERGED.orig"
+       rm -rf -- "$MERGED.orig"
+       test -e "$BACKUP" && mv -- "$BACKUP" "$MERGED.orig"
        rm -f -- "$LOCAL" "$REMOTE" "$BASE"
     else
        rm -f -- "$LOCAL" "$REMOTE" "$BASE" "$BACKUP"
@@ -52,11 +57,13 @@ describe_file () {
        echo "deleted"
     elif is_symlink "$mode" ; then
        echo "a symbolic link -> '$(cat "$file")'"
+    elif is_submodule "$mode" ; then
+       echo "submodule commit $file"
     else
        if base_present; then
-           echo "modified"
+           echo "modified file"
        else
-           echo "created"
+           echo "created file"
        fi
     fi
 }
@@ -65,7 +72,7 @@ describe_file () {
 resolve_symlink_merge () {
     while true; do
        printf "Use (l)ocal or (r)emote, or (a)bort? "
-       read ans
+       read ans || return 1
        case "$ans" in
            [lL]*)
                git checkout-index -f --stage=2 -- "$MERGED"
@@ -93,7 +100,7 @@ resolve_deleted_merge () {
        else
            printf "Use (c)reated or (d)eleted file, or (a)bort? "
        fi
-       read ans
+       read ans || return 1
        case "$ans" in
            [mMcC]*)
                git add -- "$MERGED"
@@ -112,6 +119,67 @@ resolve_deleted_merge () {
        done
 }
 
+resolve_submodule_merge () {
+    while true; do
+       printf "Use (l)ocal or (r)emote, or (a)bort? "
+       read ans || return 1
+       case "$ans" in
+           [lL]*)
+               if ! local_present; then
+                   if test -n "$(git ls-tree HEAD -- "$MERGED")"; then
+                       # Local isn't present, but it's a subdirectory
+                       git ls-tree --full-name -r HEAD -- "$MERGED" | git update-index --index-info || exit $?
+                   else
+                       test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
+                       git update-index --force-remove "$MERGED"
+                       cleanup_temp_files --save-backup
+                   fi
+               elif is_submodule "$local_mode"; then
+                   stage_submodule "$MERGED" "$local_sha1"
+               else
+                   git checkout-index -f --stage=2 -- "$MERGED"
+                   git add -- "$MERGED"
+               fi
+               return 0
+               ;;
+           [rR]*)
+               if ! remote_present; then
+                   if test -n "$(git ls-tree MERGE_HEAD -- "$MERGED")"; then
+                       # Remote isn't present, but it's a subdirectory
+                       git ls-tree --full-name -r MERGE_HEAD -- "$MERGED" | git update-index --index-info || exit $?
+                   else
+                       test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
+                       git update-index --force-remove "$MERGED"
+                   fi
+               elif is_submodule "$remote_mode"; then
+                   ! is_submodule "$local_mode" && test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
+                   stage_submodule "$MERGED" "$remote_sha1"
+               else
+                   test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
+                   git checkout-index -f --stage=3 -- "$MERGED"
+                   git add -- "$MERGED"
+               fi
+               cleanup_temp_files --save-backup
+               return 0
+               ;;
+           [aA]*)
+               return 1
+               ;;
+           esac
+       done
+}
+
+stage_submodule () {
+    path="$1"
+    submodule_sha1="$2"
+    mkdir -p "$path" || die "fatal: unable to create directory for module at $path"
+    # Find $path relative to work tree
+    work_tree_root=$(cd_to_toplevel && pwd)
+    work_rel_path=$(cd "$path" && GIT_WORK_TREE="${work_tree_root}" git rev-parse --show-prefix)
+    test -n "$work_rel_path" || die "fatal: unable to get path of module $path relative to work tree"
+    git update-index --add --replace --cacheinfo 160000 "$submodule_sha1" "${work_rel_path%/}" || die
+}
+
 checkout_staged_file () {
     tmpfile=$(expr "$(git checkout-index --temp --stage="$1" "$2")" : '\([^    ]*\)    ')
 
@@ -139,13 +207,23 @@ merge_file () {
     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;}')
 
+    if is_submodule "$local_mode" || is_submodule "$remote_mode"; then
+       echo "Submodule merge conflict for '$MERGED':"
+       local_sha1=$(git ls-files -u -- "$MERGED" | awk '{if ($3==2) print $2;}')
+       remote_sha1=$(git ls-files -u -- "$MERGED" | awk '{if ($3==3) print $2;}')
+       describe_file "$local_mode" "local" "$local_sha1"
+       describe_file "$remote_mode" "remote" "$remote_sha1"
+       resolve_submodule_merge
+       return
+    fi
+
+    mv -- "$MERGED" "$BACKUP"
+    cp -- "$BACKUP" "$MERGED"
+
     base_present   && checkout_staged_file 1 "$MERGED" "$BASE"
     local_present  && checkout_staged_file 2 "$MERGED" "$LOCAL"
     remote_present && checkout_staged_file 3 "$MERGED" "$REMOTE"
@@ -171,7 +249,7 @@ merge_file () {
     describe_file "$remote_mode" "remote" "$REMOTE"
     if "$prompt" = true; then
        printf "Hit return to start merge resolution tool (%s): " "$merge_tool"
-       read ans
+       read ans || return 1
     fi
 
     if base_present; then
@@ -242,7 +320,7 @@ done
 prompt_after_failed_merge() {
     while true; do
        printf "Continue merging other unresolved paths (y/n) ? "
-       read ans
+       read ans || return 1
        case "$ans" in
 
            [yY]*)
@@ -264,42 +342,42 @@ merge_keep_temporaries="$(git config --bool mergetool.keepTemporaries || echo fa
 
 last_status=0
 rollup_status=0
+files=
 
 if test $# -eq 0 ; then
-    files=$(git ls-files -u | sed -e 's/^[^    ]*      //' | sort -u)
-    if test -z "$files" ; then
-       echo "No files need merging"
-       exit 0
+    cd_to_toplevel
+
+    if test -e "$GIT_DIR/MERGE_RR"
+    then
+       files=$(git rerere remaining)
+    else
+       files=$(git ls-files -u | sed -e 's/^[^ ]*      //' | sort -u)
     fi
-    echo Merging the files: "$files"
-    git ls-files -u |
-    sed -e 's/^[^      ]*      //' |
-    sort -u |
-    while IFS= read i
-    do
-       if test $last_status -ne 0; then
-           prompt_after_failed_merge < /dev/tty || exit 1
-       fi
-       printf "\n"
-       merge_file "$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
-       if test $last_status -ne 0; then
-           prompt_after_failed_merge || exit 1
-       fi
-       printf "\n"
-       merge_file "$1"
-       last_status=$?
-       if test $last_status -ne 0; then
-           rollup_status=1
-       fi
-       shift
-    done
+    files=$(git ls-files -u -- "$@" | sed -e 's/^[^    ]*      //' | sort -u)
 fi
 
+if test -z "$files" ; then
+    echo "No files need merging"
+    exit 0
+fi
+
+printf "Merging:\n"
+printf "$files\n"
+
+IFS='
+'
+for i in $files
+do
+    if test $last_status -ne 0; then
+       prompt_after_failed_merge || exit 1
+    fi
+    printf "\n"
+    merge_file "$i"
+    last_status=$?
+    if test $last_status -ne 0; then
+       rollup_status=1
+    fi
+done
+
 exit $rollup_status