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clone: set fetch.bundleURI if appropriate

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Bundle providers may organize their bundle lists in a way that is
intended to improve incremental fetches, not just initial clones.
However, they do need to state that they have organized with that in
mind, or else the client will not expect to save time by downloading
bundles after the initial clone. This is done by specifying a
bundle.heuristic value.

There are two types of bundle lists: those at a static URI and those
that are advertised from a Git remote over protocol v2.

The new fetch.bundleURI config value applies for static bundle URIs that
are not advertised over protocol v2. If the user specifies a static URI
via 'git clone --bundle-uri', then Git can set this config as a reminder
for future 'git fetch' operations to check the bundle list before
connecting to the remote(s).

For lists provided over protocol v2, we will want to take a different
approach and create a property of the remote itself by creating a
remote.<id>.* type config key. That is not implemented in this change.

Later changes will update 'git fetch' to consume this option.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2023-01-31 13:29:15 +00:00
committed by Junio C Hamano
parent 7903efb717
commit 4074d3c7e1
5 changed files with 63 additions and 3 deletions
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6
builtin/clone.c
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@@ -1248,12 +1248,16 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
* data from the --bundle-uri option.
*/
if (bundle_uri) {
int has_heuristic = 0;
/* At this point, we need the_repository to match the cloned repo. */
if (repo_init(the_repository, git_dir, work_tree))
warning(_("failed to initialize the repo, skipping bundle URI"));
else if (fetch_bundle_uri(the_repository, bundle_uri))
else if (fetch_bundle_uri(the_repository, bundle_uri, &has_heuristic))
warning(_("failed to fetch objects from bundle URI '%s'"),
bundle_uri);
else if (has_heuristic)
git_config_set_gently("fetch.bundleuri", bundle_uri);
}
strvec_push(&transport_ls_refs_options.ref_prefixes, "HEAD");