In subsequent commits we'll get rid of our use of `the_repository` in
"odb.c" in favor of explicitly passing in a `struct object_database` or
a `struct odb_backend`. In some cases though we'll need access to the
repository, for example to read a config value from it, but we don't
have a way to access the repository owning a specific object database.
Introduce parent pointers for `struct object_database` to its owning
repository as well as for `struct odb_backend` to its owning object
database, which will allow us to adapt those use cases.
Note that this change requires us to pass through the object database to
`link_alt_odb_entry()` so that we can set up the parent pointers for any
alternative backends there. The callchain is adapted to pass through the
object database accordingly.
Signed-off-by: Patrick Steinhardt <ps@xxxxxx>
---
odb.c | 43 +++++++++++++++++++++++++------------------
odb.h | 6 ++++++
2 files changed, 31 insertions(+), 18 deletions(-)
diff --git a/odb.c b/odb.c
index 435f532a9c4..67207ce636d 100644
--- a/odb.c
+++ b/odb.c
@@ -135,11 +135,15 @@ static int alt_odb_usable(struct object_database *o,
* of the object ID, an extra slash for the first level indirection, and
* the terminating NUL.
*/
-static void read_info_alternates(struct repository *r,
+static void read_info_alternates(struct object_database *odb,
const char *relative_base,
int depth);
-static int link_alt_odb_entry(struct repository *r, const struct strbuf *entry,
- const char *relative_base, int depth, const char *normalized_objdir)
+
+static int link_alt_odb_entry(struct object_database *odb,
+ const struct strbuf *entry,
+ const char *relative_base,
+ int depth,
+ const char *normalized_objdir)
{
struct odb_backend *backend;
struct strbuf pathbuf = STRBUF_INIT;
@@ -167,22 +171,23 @@ static int link_alt_odb_entry(struct repository *r, const struct strbuf *entry,
while (pathbuf.len && pathbuf.buf[pathbuf.len - 1] == '/')
strbuf_setlen(&pathbuf, pathbuf.len - 1);
- if (!alt_odb_usable(r->objects, &pathbuf, normalized_objdir, &pos))
+ if (!alt_odb_usable(odb, &pathbuf, normalized_objdir, &pos))
goto error;
CALLOC_ARRAY(backend, 1);
+ backend->odb = odb;
/* pathbuf.buf is already in r->objects->backend_by_path */
backend->path = strbuf_detach(&pathbuf, NULL);
/* add the alternate entry */
- *r->objects->backends_tail = backend;
- r->objects->backends_tail = &(backend->next);
+ *odb->backends_tail = backend;
+ odb->backends_tail = &(backend->next);
backend->next = NULL;
- assert(r->objects->backend_by_path);
- kh_value(r->objects->backend_by_path, pos) = backend;
+ assert(odb->backend_by_path);
+ kh_value(odb->backend_by_path, pos) = backend;
/* recursively add alternates */
- read_info_alternates(r, backend->path, depth + 1);
+ read_info_alternates(odb, backend->path, depth + 1);
ret = 0;
error:
strbuf_release(&tmp);
@@ -219,7 +224,7 @@ static const char *parse_alt_odb_entry(const char *string,
return end;
}
-static void link_alt_odb_entries(struct repository *r, const char *alt,
+static void link_alt_odb_entries(struct object_database *odb, const char *alt,
int sep, const char *relative_base, int depth)
{
struct strbuf objdirbuf = STRBUF_INIT;
@@ -234,20 +239,20 @@ static void link_alt_odb_entries(struct repository *r, const char *alt,
return;
}
- strbuf_realpath(&objdirbuf, r->objects->backends->path, 1);
+ strbuf_realpath(&objdirbuf, odb->backends->path, 1);
while (*alt) {
alt = parse_alt_odb_entry(alt, sep, &entry);
if (!entry.len)
continue;
- link_alt_odb_entry(r, &entry,
+ link_alt_odb_entry(odb, &entry,
relative_base, depth, objdirbuf.buf);
}
strbuf_release(&entry);
strbuf_release(&objdirbuf);
}
-static void read_info_alternates(struct repository *r,
+static void read_info_alternates(struct object_database *odb,
const char *relative_base,
int depth)
{
@@ -261,7 +266,7 @@ static void read_info_alternates(struct repository *r,
return;
}
- link_alt_odb_entries(r, buf.buf, '\n', relative_base, depth);
+ link_alt_odb_entries(odb, buf.buf, '\n', relative_base, depth);
strbuf_release(&buf);
free(path);
}
@@ -303,7 +308,7 @@ void add_to_alternates_file(const char *reference)
if (commit_lock_file(&lock))
die_errno(_("unable to move new alternates file into place"));
if (the_repository->objects->loaded_alternates)
- link_alt_odb_entries(the_repository, reference,
+ link_alt_odb_entries(the_repository->objects, reference,
'\n', NULL, 0);
}
free(alts);
@@ -317,7 +322,7 @@ void add_to_alternates_memory(const char *reference)
*/
prepare_alt_odb(the_repository);
- link_alt_odb_entries(the_repository, reference,
+ link_alt_odb_entries(the_repository->objects, reference,
'\n', NULL, 0);
}
@@ -336,6 +341,7 @@ struct odb_backend *set_temporary_primary_odb(const char *dir, int will_destroy)
* alternate
*/
backend = xcalloc(1, sizeof(*backend));
+ backend->odb = the_repository->objects;
backend->path = xstrdup(dir);
/*
@@ -580,9 +586,9 @@ void prepare_alt_odb(struct repository *r)
if (r->objects->loaded_alternates)
return;
- link_alt_odb_entries(r, r->objects->alternate_db, PATH_SEP, NULL, 0);
+ link_alt_odb_entries(r->objects, r->objects->alternate_db, PATH_SEP, NULL, 0);
- read_info_alternates(r, r->objects->backends->path, 0);
+ read_info_alternates(r->objects, r->objects->backends->path, 0);
r->objects->loaded_alternates = 1;
}
@@ -964,6 +970,7 @@ struct object_database *odb_new(struct repository *repo)
struct object_database *o = xmalloc(sizeof(*o));
memset(o, 0, sizeof(*o));
+ o->repo = repo;
INIT_LIST_HEAD(&o->packed_git_mru);
hashmap_init(&o->pack_map, pack_map_entry_cmp, NULL, 0);
pthread_mutex_init(&o->replace_mutex, NULL);
diff --git a/odb.h b/odb.h
index 5774e1d615b..1617a9bac2c 100644
--- a/odb.h
+++ b/odb.h
@@ -16,6 +16,9 @@ struct repository;
struct odb_backend {
struct odb_backend *next;
+ /* Object database that owns this backend. */
+ struct object_database *odb;
+
/*
* Used to store the results of readdir(3) calls when we are OK
* sacrificing accuracy due to races for speed. That includes
@@ -93,6 +96,9 @@ struct cached_object_entry;
* configured via alternates.
*/
struct object_database {
+ /* Repository that owns this database. */
+ struct repository *repo;
+
/*
* Set of all object directories; the main directory is first (and
* cannot be NULL after initialization). Subsequent directories are
--
2.49.0.1045.g170613ef41.dirty
