Much like with the dumb HTTP transport, there isn't a way to explicitly
specify the hash algorithm when dealing with a bundle, so detect the
algorithm based on the length of the object IDs in the prerequisites and
ref advertisements.
Signed-off-by: brian m. carlson <sandals@xxxxxxxxxxxxxxxxxxxx>
---
bundle.c | 22 +++++++++++++++++++++-
bundle.h | 1 +
transport.c | 10 ++++++++--
3 files changed, 30 insertions(+), 3 deletions(-)
diff --git a/bundle.c b/bundle.c
index 99439e07a1..2a0d744d3f 100644
--- a/bundle.c
+++ b/bundle.c
@@ -23,6 +23,17 @@ static void add_to_ref_list(const struct object_id *oid, const char *name,
list->nr++;
}
+static const struct git_hash_algo *detect_hash_algo(struct strbuf *buf)
+{
+ size_t len = strcspn(buf->buf, " \n");
+ int algo;
+
+ algo = hash_algo_by_length(len / 2);
+ if (algo == GIT_HASH_UNKNOWN)
+ return NULL;
+ return &hash_algos[algo];
+}
+
static int parse_bundle_header(int fd, struct bundle_header *header,
const char *report_path)
{
@@ -52,12 +63,21 @@ static int parse_bundle_header(int fd, struct bundle_header *header,
}
strbuf_rtrim(&buf);
+ if (!header->hash_algo) {
+ header->hash_algo = detect_hash_algo(&buf);
+ if (!header->hash_algo) {
+ error(_("unknown hash algorithm length"));
+ status = -1;
+ break;
+ }
+ }
+
/*
* Tip lines have object name, SP, and refname.
* Prerequisites have object name that is optionally
* followed by SP and subject line.
*/
- if (parse_oid_hex(buf.buf, &oid, &p) ||
+ if (parse_oid_hex_algop(buf.buf, &oid, &p, header->hash_algo) ||
(*p && !isspace(*p)) ||
(!is_prereq && !*p)) {
if (report_path)
diff --git a/bundle.h b/bundle.h
index ceab0c7475..2dc9442024 100644
--- a/bundle.h
+++ b/bundle.h
@@ -15,6 +15,7 @@ struct ref_list {
struct bundle_header {
struct ref_list prerequisites;
struct ref_list references;
+ const struct git_hash_algo *hash_algo;
};
int is_bundle(const char *path, int quiet);
diff --git a/transport.c b/transport.c
index a016f41702..b255f123c0 100644
--- a/transport.c
+++ b/transport.c
@@ -143,6 +143,9 @@ static struct ref *get_refs_from_bundle(struct transport *transport,
data->fd = read_bundle_header(transport->url, &data->header);
if (data->fd < 0)
die(_("could not read bundle '%s'"), transport->url);
+
+ transport->hash_algo = data->header.hash_algo;
+
for (i = 0; i < data->header.references.nr; i++) {
struct ref_list_entry *e = data->header.references.list + i;
struct ref *ref = alloc_ref(e->name);
@@ -157,11 +160,14 @@ static int fetch_refs_from_bundle(struct transport *transport,
int nr_heads, struct ref **to_fetch)
{
struct bundle_transport_data *data = transport->data;
+ int ret;
if (!data->get_refs_from_bundle_called)
get_refs_from_bundle(transport, 0, NULL);
- return unbundle(the_repository, &data->header, data->fd,
- transport->progress ? BUNDLE_VERBOSE : 0);
+ ret = unbundle(the_repository, &data->header, data->fd,
+ transport->progress ? BUNDLE_VERBOSE : 0);
+ transport->hash_algo = data->header.hash_algo;
+ return ret;
}
static int close_bundle(struct transport *transport)
