[RFC PATCHv2 03/17] update submodules: move up prepare_submodule_repo_env

[Stefan Beller <sbeller@google.com>]

In a later patch we need to prepare the submodule environment with
another git directory, so split up the function.

Also move it up in the file such that we do not need to declare the
function later before using it.

Signed-off-by: Stefan Beller <sbeller@google.com>
---
 submodule.c | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/submodule.c b/submodule.c
index eb80b0c5ad..78b69b5a55 100644
--- a/submodule.c
+++ b/submodule.c
@@ -307,6 +307,22 @@ static void print_submodule_summary(struct rev_info *rev, FILE *f,
 	strbuf_release(&sb);
 }
 
+static void prepare_submodule_repo_env_no_git_dir(struct argv_array *out)
+{
+	const char * const *var;
+
+	for (var = local_repo_env; *var; var++) {
+		if (strcmp(*var, CONFIG_DATA_ENVIRONMENT))
+			argv_array_push(out, *var);
+	}
+}
+
+void prepare_submodule_repo_env(struct argv_array *out)
+{
+	prepare_submodule_repo_env_no_git_dir(out);
+	argv_array_push(out, "GIT_DIR=.git");
+}
+
 /* Helper function to display the submodule header line prior to the full
  * summary output. If it can locate the submodule objects directory it will
  * attempt to lookup both the left and right commits and put them into the
@@ -1246,14 +1262,3 @@ int parallel_submodules(void)
 {
 	return parallel_jobs;
 }
-
-void prepare_submodule_repo_env(struct argv_array *out)
-{
-	const char * const *var;
-
-	for (var = local_repo_env; *var; var++) {
-		if (strcmp(*var, CONFIG_DATA_ENVIRONMENT))
-			argv_array_push(out, *var);
-	}
-	argv_array_push(out, "GIT_DIR=.git");
-}
-- 
2.11.0.rc2.28.g2673dad