mmap(win32): avoid copy-on-write when it is unnecessary

diff --git a/git-mergetool.sh b/git-mergetool.sh
index 9f77e3a8bb0b1197f860912b6d0e56b40b607cb9..f67bab55e85d00b06601fa488ba01975eb865359 100755 (executable)
--- a/git-mergetool.sh
+++ b/git-mergetool.sh
@@ -126,7 +126,12 @@ resolve_deleted_merge () {
                case "$ans" in
                [mMcC]*)
                        git add -- "$MERGED"
-                       cleanup_temp_files --save-backup
+                       if test "$merge_keep_backup" = "true"
+                       then
+                               cleanup_temp_files --save-backup
+                       else
+                               cleanup_temp_files
+                       fi
                        return 0
                        ;;
                [dD]*)
@@ -135,6 +140,10 @@ resolve_deleted_merge () {
                        return 0
                        ;;
                [aA]*)
+                       if test "$merge_keep_temporaries" = "false"
+                       then
+                               cleanup_temp_files
+                       fi
                        return 1
                        ;;
                esac
@@ -282,8 +291,14 @@ merge_file () {
                return
        fi
 
-       mv -- "$MERGED" "$BACKUP"
-       cp -- "$BACKUP" "$MERGED"
+       if test -f "$MERGED"
+       then
+               mv -- "$MERGED" "$BACKUP"
+               cp -- "$BACKUP" "$MERGED"
+       fi
+       # Create a parent directory to handle delete/delete conflicts
+       # where the base's directory no longer exists.
+       mkdir -p "$(dirname "$MERGED")"
 
        checkout_staged_file 1 "$MERGED" "$BASE"
        checkout_staged_file 2 "$MERGED" "$LOCAL"
@@ -295,7 +310,9 @@ merge_file () {
                describe_file "$local_mode" "local" "$LOCAL"
                describe_file "$remote_mode" "remote" "$REMOTE"
                resolve_deleted_merge
-               return
+               status=$?
+               rmdir -p "$(dirname "$MERGED")" 2>/dev/null
+               return $status
        fi
 
        if is_symlink "$local_mode" || is_symlink "$remote_mode"