submodule.c & submodule--helper: pass along "super_prefix" param

Start passing the "super_prefix" along as a parameter to
get_submodule_displaypath() and absorb_git_dir_into_superproject(),
rather than get the value directly as a global.

This is in preparation for subsequent commits, where we'll gradually
phase out get_super_prefix() for an alternative way of getting the
"super_prefix".

Most of the users of this get a get_super_prefix() value, either
directly or by indirection. The exceptions are:

- builtin/rm.c: Doesn't declare SUPPORT_SUPER_PREFIX, so we'd have
  died if this was provided, so it's safe to pass "NULL".

- deinit_submodule(): The "deinit_submodule()" function has never been
  able to use the "git -super-prefix". It will call
  "absorb_git_dir_into_superproject()", but it will only do so from the
  top-level project.

  If "absorbgitdirs" recurses will use the "path" passed to
  "absorb_git_dir_into_superproject()" in "deinit_submodule()" as its
  starting "--super-prefix". So we can safely remove the
  get_super_prefix() call here, and pass NULL instead.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 9 insertions, 6 deletions

diff --git a/submodule.c b/submodule.c
index 8ac2fca855..bf19598b8c 100644
--- a/submodule.c
+++ b/submodule.c
@@ -2145,7 +2145,8 @@ int submodule_move_head(const char *path,
 	if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
 		if (old_head) {
 			if (!submodule_uses_gitfile(path))
-				absorb_git_dir_into_superproject(path);
+				absorb_git_dir_into_superproject(path,
+								 get_super_prefix());
 		} else {
 			struct strbuf gitdir = STRBUF_INIT;
 			submodule_name_to_gitdir(&gitdir, the_repository,
@@ -2315,7 +2316,8 @@ static void relocate_single_git_dir_into_superproject(const char *path)
 	strbuf_release(&new_gitdir);
 }
 
-static void absorb_git_dir_into_superproject_recurse(const char *path)
+static void absorb_git_dir_into_superproject_recurse(const char *path,
+						     const char *super_prefix)
 {
 
 	struct child_process cp = CHILD_PROCESS_INIT;
@@ -2323,8 +2325,8 @@ static void absorb_git_dir_into_superproject_recurse(const char *path)
 	cp.dir = path;
 	cp.git_cmd = 1;
 	cp.no_stdin = 1;
-	strvec_pushf(&cp.args, "--super-prefix=%s%s/",
-		     get_super_prefix_or_empty(), path);
+	strvec_pushf(&cp.args, "--super-prefix=%s%s/", super_prefix ?
+		     super_prefix : "", path);
 	strvec_pushl(&cp.args, "submodule--helper",
 		     "absorbgitdirs", NULL);
 	prepare_submodule_repo_env(&cp.env);
@@ -2337,7 +2339,8 @@ static void absorb_git_dir_into_superproject_recurse(const char *path)
  * having its git directory within the working tree to the git dir nested
  * in its superprojects git dir under modules/.
  */
-void absorb_git_dir_into_superproject(const char *path)
+void absorb_git_dir_into_superproject(const char *path,
+				      const char *super_prefix)
 {
 	int err_code;
 	const char *sub_git_dir;
@@ -2386,7 +2389,7 @@ void absorb_git_dir_into_superproject(const char *path)
 	}
 	strbuf_release(&gitdir);
 
-	absorb_git_dir_into_superproject_recurse(path);
+	absorb_git_dir_into_superproject_recurse(path, super_prefix);
 }
 
 int get_superproject_working_tree(struct strbuf *buf)