[PATCH v7 5/9] submodule: extract normalize_path into standalone function

[Jon Seymour <jon.seymour@gmail.com>]

Extract the normalize_path function so that it can be re-used elsewhere.

Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
---
 git-submodule.sh | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/git-submodule.sh b/git-submodule.sh
index 64a70d6..dbbc905 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -176,6 +176,21 @@ module_clone()
 	(clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
 }
 
+normalize_path()
+{
+	# normalize path:
+	# multiple //; leading ./; /./; /../; trailing /
+	printf '%s/\n' "$1" |
+		sed -e '
+			s|//*|/|g
+			s|^\(\./\)*||
+			s|/\./|/|g
+			:start
+			s|\([^/]*\)/\.\./||
+			tstart
+			s|/*$||
+		'
+}
 #
 # Add a new submodule to the working tree, .gitmodules and the index
 #
@@ -250,18 +265,7 @@ cmd_add()
 	;;
 	esac
 
-	# normalize path:
-	# multiple //; leading ./; /./; /../; trailing /
-	sm_path=$(printf '%s/\n' "$sm_path" |
-		sed -e '
-			s|//*|/|g
-			s|^\(\./\)*||
-			s|/\./|/|g
-			:start
-			s|\([^/]*\)/\.\./||
-			tstart
-			s|/*$||
-		')
+	sm_path="$(normalize_path "$sm_path")"
 	git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 	die "$(eval_gettext "'\$sm_path' already exists in the index")"
 
-- 
1.7.10.2.656.g24a6219