[PATCH v2 05/17] odb: get rid of `the_repository` in `find_odb()`

[Patrick Steinhardt <ps@pks.im>]

Get rid of our dependency on `the_repository` in `find_odb()` by passing
in the object database in which we want to search for the alternate and
adjusting all callers.

Rename the function to `odb_find_alternate()`.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 builtin/commit-graph.c | 4 ++--
 midx-write.c           | 2 +-
 odb.c                  | 6 +++---
 odb.h                  | 7 ++++++-
 4 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
index ae8ac52a975..90c767797e2 100644
--- a/builtin/commit-graph.c
+++ b/builtin/commit-graph.c
@@ -101,7 +101,7 @@ static int graph_verify(int argc, const char **argv, const char *prefix,
 	if (opts.progress)
 		flags |= COMMIT_GRAPH_WRITE_PROGRESS;
 
-	alternate = find_odb(the_repository, opts.obj_dir);
+	alternate = odb_find_alternate(the_repository->objects, opts.obj_dir);
 	graph_name = get_commit_graph_filename(alternate);
 	chain_name = get_commit_graph_chain_filename(alternate);
 	if (open_commit_graph(graph_name, &fd, &st))
@@ -289,7 +289,7 @@ static int graph_write(int argc, const char **argv, const char *prefix,
 	    git_env_bool(GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS, 0))
 		flags |= COMMIT_GRAPH_WRITE_BLOOM_FILTERS;
 
-	alternate = find_odb(the_repository, opts.obj_dir);
+	alternate = odb_find_alternate(the_repository->objects, opts.obj_dir);
 
 	if (opts.reachable) {
 		if (write_commit_graph_reachable(alternate, flags, &write_opts))
diff --git a/midx-write.c b/midx-write.c
index dd3b3070e55..dd65800e8b3 100644
--- a/midx-write.c
+++ b/midx-write.c
@@ -922,7 +922,7 @@ static struct multi_pack_index *lookup_multi_pack_index(struct repository *r,
 	struct strbuf cur_path_real = STRBUF_INIT;
 
 	/* Ensure the given object_dir is local, or a known alternate. */
-	find_odb(r, obj_dir_real);
+	odb_find_alternate(r->objects, obj_dir_real);
 
 	for (cur = get_multi_pack_index(r); cur; cur = cur->next) {
 		strbuf_realpath(&cur_path_real, cur->object_dir, 1);
diff --git a/odb.c b/odb.c
index 2b36735087e..621a16b35ea 100644
--- a/odb.c
+++ b/odb.c
@@ -448,14 +448,14 @@ char *compute_alternate_path(const char *path, struct strbuf *err)
 	return ref_git;
 }
 
-struct odb_alternate *find_odb(struct repository *r, const char *obj_dir)
+struct odb_alternate *odb_find_alternate(struct object_database *odb, const char *obj_dir)
 {
 	struct odb_alternate *alternate;
 	char *obj_dir_real = real_pathdup(obj_dir, 1);
 	struct strbuf odb_path_real = STRBUF_INIT;
 
-	prepare_alt_odb(r);
-	for (alternate = r->objects->alternates; alternate; alternate = alternate->next) {
+	prepare_alt_odb(odb->repo);
+	for (alternate = odb->alternates; alternate; alternate = alternate->next) {
 		strbuf_realpath(&odb_path_real, alternate->path, 1);
 		if (!strcmp(obj_dir_real, odb_path_real.buf))
 			break;
diff --git a/odb.h b/odb.h
index 745e38c1931..60d6358c2c6 100644
--- a/odb.h
+++ b/odb.h
@@ -58,7 +58,6 @@ struct odb_alternate {
 void prepare_alt_odb(struct repository *r);
 int has_alt_odb(struct repository *r);
 char *compute_alternate_path(const char *path, struct strbuf *err);
-struct odb_alternate *find_odb(struct repository *r, const char *obj_dir);
 typedef int alt_odb_fn(struct odb_alternate *, void *);
 int foreach_alt_odb(alt_odb_fn, void*);
 typedef void alternate_ref_fn(const struct object_id *oid, void *);
@@ -185,6 +184,12 @@ struct object_database {
 struct object_database *odb_new(struct repository *repo);
 void odb_clear(struct object_database *o);
 
+/*
+ * Find backend by its object directory path. Dies in case the object directory
+ * couldn't be found.
+ */
+struct odb_alternate *odb_find_alternate(struct object_database *odb, const char *obj_dir);
+
 /*
  * Create a temporary file rooted in the object database directory, or
  * die on failure. The filename is taken from "pattern", which should have the

-- 
2.49.0.1077.gc0e912fd4c.dirty