[PATCH v2 3/4] sha1_file.c: move delayed getenv(altdb) back to setup_git_env()

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getenv() is supposed to work on the main repository only. This delayed
getenv() code in sha1_file.c makes it more difficult to convert
sha1_file.c to a generic object store that could be used by both
submodule and main repositories.

Move the getenv() back in setup_git_env() where other env vars are
also fetched.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
 environment.c  | 1 +
 object-store.h | 5 ++++-
 object.c       | 1 +
 repository.c   | 2 ++
 repository.h   | 1 +
 sha1_file.c    | 6 +-----
 6 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/environment.c b/environment.c
index 74a2900ddf..47c6e31559 100644
--- a/environment.c
+++ b/environment.c
@@ -174,6 +174,7 @@ void setup_git_env(const char *git_dir)
 	args.object_dir = getenv_safe(&to_free, DB_ENVIRONMENT);
 	args.graft_file = getenv_safe(&to_free, GRAFT_ENVIRONMENT);
 	args.index_file = getenv_safe(&to_free, INDEX_ENVIRONMENT);
+	args.alternate_db = getenv_safe(&to_free, ALTERNATE_DB_ENVIRONMENT);
 	repo_set_gitdir(the_repository, git_dir, &args);
 	argv_array_clear(&to_free);
 
diff --git a/object-store.h b/object-store.h
index afe2f93459..9b1303549b 100644
--- a/object-store.h
+++ b/object-store.h
@@ -87,6 +87,9 @@ struct raw_object_store {
 	 */
 	char *objectdir;
 
+	/* Path to extra alternate object database if not NULL */
+	char *alternate_db;
+
 	struct packed_git *packed_git;
 	/* A most-recently-used ordered version of the packed_git list. */
 	struct list_head packed_git_mru;
@@ -109,7 +112,7 @@ struct raw_object_store {
 	unsigned packed_git_initialized : 1;
 };
 
-#define RAW_OBJECT_STORE_INIT(o) { NULL, NULL, LIST_HEAD_INIT(o.packed_git_mru), NULL, NULL, 0, 0, 0 }
+#define RAW_OBJECT_STORE_INIT(o) { NULL, NULL, NULL, LIST_HEAD_INIT(o.packed_git_mru), NULL, NULL, 0, 0, 0 }
 
 void raw_object_store_clear(struct raw_object_store *o);
 
diff --git a/object.c b/object.c
index a7c238339b..5317cfc390 100644
--- a/object.c
+++ b/object.c
@@ -464,6 +464,7 @@ static void free_alt_odbs(struct raw_object_store *o)
 void raw_object_store_clear(struct raw_object_store *o)
 {
 	FREE_AND_NULL(o->objectdir);
+	FREE_AND_NULL(o->alternate_db);
 
 	free_alt_odbs(o);
 	o->alt_odb_tail = NULL;
diff --git a/repository.c b/repository.c
index 7654b8ada9..e326f0fcbc 100644
--- a/repository.c
+++ b/repository.c
@@ -61,6 +61,8 @@ void repo_set_gitdir(struct repository *repo,
 	repo_set_commondir(repo, o->shared_root);
 	expand_base_dir(&repo->objects.objectdir, o->object_dir,
 			repo->commondir, "objects");
+	free(repo->objects.alternate_db);
+	repo->objects.alternate_db = xstrdup_or_null(o->alternate_db);
 	expand_base_dir(&repo->graft_file, o->graft_file,
 			repo->commondir, "info/grafts");
 	expand_base_dir(&repo->index_file, o->index_file,
diff --git a/repository.h b/repository.h
index b5b5d138aa..b1da2a6384 100644
--- a/repository.h
+++ b/repository.h
@@ -94,6 +94,7 @@ struct set_gitdir_args {
 	const char *object_dir;
 	const char *graft_file;
 	const char *index_file;
+	const char *alternate_db;
 };
 
 extern void repo_set_gitdir(struct repository *repo,
diff --git a/sha1_file.c b/sha1_file.c
index dfc8deec38..ad1cd441e6 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -673,15 +673,11 @@ int foreach_alt_odb(alt_odb_fn fn, void *cb)
 
 void prepare_alt_odb(struct repository *r)
 {
-	const char *alt;
-
 	if (r->objects.alt_odb_tail)
 		return;
 
-	alt = getenv(ALTERNATE_DB_ENVIRONMENT);
-
 	r->objects.alt_odb_tail = &r->objects.alt_odb_list;
-	link_alt_odb_entries(r, alt, PATH_SEP, NULL, 0);
+	link_alt_odb_entries(r, r->objects.alternate_db, PATH_SEP, NULL, 0);
 
 	read_info_alternates(r, r->objects.objectdir, 0);
 }
-- 
2.16.1.435.g8f24da2e1a




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