From: Derrick Stolee via GitGitGadget Date: Wed, 23 Feb 2022 17:55:08 GMT Subject: [PATCH 08/11] bundle: parse filter capability Message-ID: In-Reply-To: From: Derrick Stolee 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'. Signed-off-by: Derrick Stolee --- bundle.c | 17 ++++++++++++++++- bundle.h | 3 +++ list-objects-filter-options.c | 2 +- list-objects-filter-options.h | 5 +++++ 4 files changed, 25 insertions(+), 2 deletions(-) diff --git a/bundle.c b/bundle.c index dc56db9a50a..2afced4d991 100644 --- a/bundle.c +++ b/bundle.c @@ -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 +33,8 @@ 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); + free(header->filter); } static int parse_capability(struct bundle_header *header, const char *capability) @@ -45,6 +47,11 @@ 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)) { + CALLOC_ARRAY(header->filter, 1); + parse_list_objects_filter(header->filter, arg); + return 0; + } return error(_("unknown capability '%s'"), capability); } @@ -220,6 +227,8 @@ int verify_bundle(struct repository *r, req_nr = revs.pending.nr; setup_revisions(2, argv, &revs, NULL); + revs.filter = header->filter; + if (prepare_revision_walk(&revs)) die(_("revision walk setup failed")); @@ -259,6 +268,12 @@ int verify_bundle(struct repository *r, r->nr), r->nr); list_refs(r, 0, NULL); + + if (header->filter) { + 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.")); diff --git a/bundle.h b/bundle.h index 06009fe6b1f..eb026153d56 100644 --- a/bundle.h +++ b/bundle.h @@ -5,11 +5,14 @@ #include "cache.h" #include "string-list.h" +struct list_objects_filter_options; + struct bundle_header { unsigned version; struct string_list prerequisites; struct string_list references; const struct git_hash_algo *hash_algo; + struct list_objects_filter_options *filter; }; #define BUNDLE_HEADER_INIT \ diff --git a/list-objects-filter-options.c b/list-objects-filter-options.c index fd8d59f653a..b9d10770e4f 100644 --- a/list-objects-filter-options.c +++ b/list-objects-filter-options.c @@ -55,7 +55,7 @@ const char *list_object_filter_config_name(enum list_objects_filter_choice c) * expand_list_objects_filter_spec() first). We also "intern" the arg for the * convenience of the current command. */ -static int gently_parse_list_objects_filter( +int gently_parse_list_objects_filter( struct list_objects_filter_options *filter_options, const char *arg, struct strbuf *errbuf) diff --git a/list-objects-filter-options.h b/list-objects-filter-options.h index da5b6737e27..347a99c28cf 100644 --- a/list-objects-filter-options.h +++ b/list-objects-filter-options.h @@ -72,6 +72,11 @@ struct list_objects_filter_options { /* Normalized command line arguments */ #define CL_ARG__FILTER "filter" +int gently_parse_list_objects_filter( + struct list_objects_filter_options *filter_options, + const char *arg, + struct strbuf *errbuf); + void list_objects_filter_die_if_populated( struct list_objects_filter_options *filter_options); -- gitgitgadget