More accurately detect header lines in read_one_header_line

diff --git a/git-merge-one-file.sh b/git-merge-one-file.sh
index b285990fb24f8a2a3dc96e27af67b6afbac024c7..5619409f1c7ee9c694c2de59aff195f971502226 100755 (executable)
--- a/git-merge-one-file.sh
+++ b/git-merge-one-file.sh
@@ -26,11 +26,7 @@ case "${1:-.}${2:-.}${3:-.}" in
        fi
        if test -f "$4"; then
                rm -f -- "$4" &&
-               dn="$4" &&
-               while dn=$(expr "$dn" : '\(.*\)/') && rmdir "$dn" 2>/dev/null
-               do
-                       :;
-               done
+               rmdir -p "$(expr "z$4" : 'z\(.*\)/')" 2>/dev/null || :
        fi &&
                exec git-update-index --remove -- "$4"
        ;;
@@ -62,6 +58,14 @@ case "${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 "$1" in
        '')
@@ -78,18 +82,21 @@ case "${1:-.}${2:-.}${3:-.}" in
                expr "$sz0" \< "$sz1" \* 2 >/dev/null || : >$orig
                ;;
        *)
-               echo "Auto-merging $4."
+               echo "Auto-merging $4"
                orig=`git-unpack-file $1`
                ;;
        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" &&
-               merge "$4" "$orig" "$src2"
+       # Be careful for funny filename such as "-L" in "$4", which
+       # would confuse "merge" greatly.
+       src1=`git-unpack-file $2`
+       merge "$src1" "$orig" "$src2"
        ret=$?
-       rm -f -- "$orig" "$src2"
+
+       # Create the working tree file, using "our tree" version from the
+       # index, and then store the result of the merge.
+       git-checkout-index -f --stage=2 -- "$4" && cat "$src1" >"$4"
+       rm -f -- "$orig" "$src1" "$src2"
 
        if [ "$6" != "$7" ]; then
                echo "ERROR: Permissions conflict: $5->$6,$7."
@@ -100,7 +107,7 @@ case "${1:-.}${2:-.}${3:-.}" in
        fi
 
        if [ $ret -ne 0 ]; then
-               echo "ERROR: Merge conflict in $4."
+               echo "ERROR: Merge conflict in $4"
                exit 1
        fi
        exec git-update-index -- "$4"