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bundle: parse filter capability

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The v3 bundle format has capabilities, allowing newer versions of Git to
create bundles with newer features. Older versions that do not
understand these new capabilities will fail with a helpful warning.

Create a new capability allowing Git to understand that the contained
pack-file is filtered according to some object filter. Typically, this
filter will be "blob:none" for a blobless partial clone.

This change teaches Git to parse this capability, place its value in the
bundle header, and demonstrate this understanding by adding a message to
'git bundle verify'.

Since we will use gently_parse_list_objects_filter() outside of
list-objects-filter-options.c, make it an external method and move its
API documentation to before its declaration.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2022-03-09 16:01:39 +00:00
committed by Junio C Hamano
parent 4f33a6345f
commit 105c6f14ad
6 changed files with 50 additions and 22 deletions
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15
bundle.c
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@ -11,7 +11,7 @@
#include "run-command.h"
#include "refs.h"
#include "strvec.h"
#include "list-objects-filter-options.h"
static const char v2_bundle_signature[] = "# v2 git bundle\n";
static const char v3_bundle_signature[] = "# v3 git bundle\n";
@ -33,6 +33,7 @@ void bundle_header_release(struct bundle_header *header)
{
string_list_clear(&header->prerequisites, 1);
string_list_clear(&header->references, 1);
list_objects_filter_release(&header->filter);
}
static int parse_capability(struct bundle_header *header, const char *capability)
@ -45,6 +46,10 @@ static int parse_capability(struct bundle_header *header, const char *capability
header->hash_algo = &hash_algos[algo];
return 0;
}
if (skip_prefix(capability, "filter=", &arg)) {
parse_list_objects_filter(&header->filter, arg);
return 0;
}
return error(_("unknown capability '%s'"), capability);
}
@ -220,6 +225,8 @@ int verify_bundle(struct repository *r,
req_nr = revs.pending.nr;
setup_revisions(2, argv, &revs, NULL);
list_objects_filter_copy(&revs.filter, &header->filter);
if (prepare_revision_walk(&revs))
die(_("revision walk setup failed"));
@ -259,6 +266,12 @@ int verify_bundle(struct repository *r,
r->nr),
r->nr);
list_refs(r, 0, NULL);
if (header->filter.choice) {
printf_ln("The bundle uses this filter: %s",
list_objects_filter_spec(&header->filter));
}
r = &header->prerequisites;
if (!r->nr) {
printf_ln(_("The bundle records a complete history."));