git-fetch: remove .keep file at the end.

Removal of them is needed regardless of errors.  The original
code had the removal outside of the process which sets the flag
to tell the later step what to remove, but it runs as a
downstream of a pipeline and its effect was lost.

Signed-off-by: Junio C Hamano <junkio@cox.net>

git-fetch.sh

@@ -382,13 +382,22 @@ fetch_main () {
       ;; # we are already done.
   *)
     ( : subshell because we muck with IFS
-      pack_lockfile=
       IFS=" 	$LF"
       (
-	  git-fetch-pack --thin $exec $keep $shallow_depth "$remote" $rref || echo failed "$remote"
+	  git-fetch-pack --thin $exec $keep $shallow_depth "$remote" $rref ||
+	  echo failed "$remote"
       ) |
-      while read sha1 remote_name
-      do
+      (
+	trap '
+		if test -n "$keepfile" && test -f "$keepfile"
+		then
+			rm -f "$keepfile"
+		fi
+	' 0
+
+        keepfile=
+	while read sha1 remote_name
+	do
 	  case "$sha1" in
 	  failed)
 		  echo >&2 "Fetch failure: $remote"
@@ -397,7 +406,7 @@ fetch_main () {
 	  pack)
 		  continue ;;
 	  keep)
-		  pack_lockfile="$GIT_OBJECT_DIRECTORY/pack/pack-$remote_name.keep"
+		  keepfile="$GIT_OBJECT_DIRECTORY/pack/pack-$remote_name.keep"
 		  continue ;;
 	  esac
 	  found=
@@ -429,8 +438,8 @@ fetch_main () {
 	  append_fetch_head "$sha1" "$remote" \
 		  "$remote_name" "$remote_nick" "$local_name" \
 		  "$not_for_merge" || exit
-      done &&
-      if [ "$pack_lockfile" ]; then rm -f "$pack_lockfile"; fi
+        done
+      )
     ) || exit ;;
   esac