git-merge-one-file: resurrect leading path creation.

[git.git] / git-merge-one-file.sh

diff --git a/git-merge-one-file.sh b/git-merge-one-file.sh
index d9ee458..88a5da9 100755 (executable)
--- a/git-merge-one-file.sh
+++ b/git-merge-one-file.sh
@@ -16,6 +16,14 @@
 # been handled already by git-read-tree, but that one doesn't
 # do any merges that might change the tree layout.
 
+verify_path() {
+    file="$1"
+    dir=`dirname "$file"` &&
+    mkdir -p "$dir" &&
+    rm -f -- "$file" &&
+    : >"$file"
+}
+
 case "${1:-.}${2:-.}${3:-.}" in
 #
 # Deleted in both or deleted in one and unchanged in the other
@@ -25,7 +33,8 @@ case "${1:-.}${2:-.}${3:-.}" in
                echo "Removing $4"
        fi
        if test -f "$4"; then
-               rm -f -- "$4"
+               rm -f -- "$4" &&
+               rmdir -p "$(expr "$4" : '\(.*\)/')" 2>/dev/null || :
        fi &&
                exec git-update-index --remove -- "$4"
        ;;
@@ -57,6 +66,14 @@ case "${1:-.}${2:-.}${3:-.}" in
 # Modified in both, but differently.
 #
 "$1$2$3" | ".$2$3")
+
+       case ",$6,$7," in
+       *,120000,*)
+               echo "ERROR: $4: Not merging symbolic link changes."
+               exit 1
+               ;;
+       esac
+
        src2=`git-unpack-file $3`
        case "$1" in
        '')
@@ -64,7 +81,13 @@ case "${1:-.}${2:-.}${3:-.}" in
                # This extracts OUR file in $orig, and uses git-apply to
                # remove lines that are unique to ours.
                orig=`git-unpack-file $2`
+               sz0=`wc -c <"$orig"`
                diff -u -La/$orig -Lb/$orig $orig $src2 | git-apply --no-add 
+               sz1=`wc -c <"$orig"`
+
+               # If we do not have enough common material, it is not
+               # worth trying two-file merge using common subsections.
+               expr "$sz0" \< "$sz1" \* 2 >/dev/null || : >$orig
                ;;
        *)
                echo "Auto-merging $4."
@@ -72,10 +95,12 @@ case "${1:-.}${2:-.}${3:-.}" in
                ;;
        esac
 
-       # We reset the index to the first branch, making
-       # git-diff-file useful
-       git-update-index --add --cacheinfo "$6" "$2" "$4"
-               git-checkout-index -u -f -- "$4" &&
+       # Create the working tree file, with the correct permission bits.
+       # we can not rely on the fact that our tree has the path, because
+       # we allow the merge to be done in an unchecked-out working tree.
+       verify_path "$4" &&
+               git-cat-file blob "$2" >"$4" &&
+               case "$6" in *7??) chmod +x -- "$4" ;; esac &&
                merge "$4" "$orig" "$src2"
        ret=$?
        rm -f -- "$orig" "$src2"