[PATCH 15/27] sha1_file: allow prepare_alt_odb to handle arbitrary repositories

[Stefan Beller <sbeller@google.com>]

Signed-off-by: Stefan Beller <sbeller@google.com>
---
 object-store.h |  3 +--
 sha1_file.c    | 21 +++++++++++----------
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/object-store.h b/object-store.h
index f283fbdba9..873b341774 100644
--- a/object-store.h
+++ b/object-store.h
@@ -24,8 +24,7 @@ struct alternate_object_database {
 	 */
 	char path[FLEX_ARRAY];
 };
-#define prepare_alt_odb(r) prepare_alt_odb_##r()
-void prepare_alt_odb_the_repository(void);
+void prepare_alt_odb(struct repository *r);
 char *compute_alternate_path(const char *path, struct strbuf *err);
 typedef int alt_odb_fn(struct alternate_object_database *, void *);
 int foreach_alt_odb(alt_odb_fn, void*);
diff --git a/sha1_file.c b/sha1_file.c
index 6e5105a252..9cf3fffbeb 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -673,21 +673,22 @@ int foreach_alt_odb(alt_odb_fn fn, void *cb)
 	return r;
 }
 
-void prepare_alt_odb_the_repository(void)
+void prepare_alt_odb(struct repository *r)
 {
-	const char *alt;
-
-	if (the_repository->objects.alt_odb_tail)
+	if (r->objects.alt_odb_tail)
 		return;
 
-	alt = getenv(ALTERNATE_DB_ENVIRONMENT);
+	r->objects.alt_odb_tail = &r->objects.alt_odb_list;
+
+	if (!r->ignore_env) {
+		const char *alt = getenv(ALTERNATE_DB_ENVIRONMENT);
+		if (!alt)
+			alt = "";
 
-	the_repository->objects.alt_odb_tail =
-			&the_repository->objects.alt_odb_list;
-	link_alt_odb_entries(the_repository, alt,
-			     PATH_SEP, NULL, 0);
+		link_alt_odb_entries(r, alt, PATH_SEP, NULL, 0);
+	}
 
-	read_info_alternates(the_repository, get_object_directory(), 0);
+	read_info_alternates(r, r->objects.objectdir, 0);
 }
 
 /* Returns 1 if we have successfully freshened the file, 0 otherwise. */
-- 
2.16.1.291.g4437f3f132-goog