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| author | Patrick Steinhardt <ps@pks.im> | 2024-06-06 07:29:49 +0200 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2024-06-06 09:04:34 -0700 |
| commit | 25a0023f28600102f54e7529c20da5928c3e9c75 (patch) | |
| tree | 899e73fbca791e0ab50b6ed9dff08f94888fc355 /builtin/refs.c | |
| parent | 6d6a3a99c7c35093c4a39cbf4d20869e2db3a4d8 (diff) | |
| download | git-25a0023f28600102f54e7529c20da5928c3e9c75.tar.gz | |
builtin/refs: new command to migrate ref storage formats
Introduce a new command that allows the user to migrate a repository
between ref storage formats. This new command is implemented as part of
a new git-refs(1) executable. This is due to two reasons:
- There is no good place to put the migration logic in existing
commands. git-maintenance(1) felt unwieldy, and git-pack-refs(1) is
not the correct place to put it, either.
- I had it in my mind to create a new low-level command for accessing
refs for quite a while already. git-refs(1) is that command and can
over time grow more functionality relating to refs. This should help
discoverability by consolidating low-level access to refs into a
single executable.
As mentioned in the preceding commit that introduces the ref storage
format migration logic, the new `git refs migrate` command still has a
bunch of restrictions. These restrictions are documented accordingly.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin/refs.c')
| -rw-r--r-- | builtin/refs.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/builtin/refs.c b/builtin/refs.c new file mode 100644 index 0000000000..46dcd150d4 --- /dev/null +++ b/builtin/refs.c @@ -0,0 +1,75 @@ +#include "builtin.h" +#include "parse-options.h" +#include "refs.h" +#include "repository.h" +#include "strbuf.h" + +#define REFS_MIGRATE_USAGE \ + N_("git refs migrate --ref-format=<format> [--dry-run]") + +static int cmd_refs_migrate(int argc, const char **argv, const char *prefix) +{ + const char * const migrate_usage[] = { + REFS_MIGRATE_USAGE, + NULL, + }; + const char *format_str = NULL; + enum ref_storage_format format; + unsigned int flags = 0; + struct option options[] = { + OPT_STRING_F(0, "ref-format", &format_str, N_("format"), + N_("specify the reference format to convert to"), + PARSE_OPT_NONEG), + OPT_BIT(0, "dry-run", &flags, + N_("perform a non-destructive dry-run"), + REPO_MIGRATE_REF_STORAGE_FORMAT_DRYRUN), + OPT_END(), + }; + struct strbuf errbuf = STRBUF_INIT; + int err; + + argc = parse_options(argc, argv, prefix, options, migrate_usage, 0); + if (argc) + usage(_("too many arguments")); + if (!format_str) + usage(_("missing --ref-format=<format>")); + + format = ref_storage_format_by_name(format_str); + if (format == REF_STORAGE_FORMAT_UNKNOWN) { + err = error(_("unknown ref storage format '%s'"), format_str); + goto out; + } + + if (the_repository->ref_storage_format == format) { + err = error(_("repository already uses '%s' format"), + ref_storage_format_to_name(format)); + goto out; + } + + if (repo_migrate_ref_storage_format(the_repository, format, flags, &errbuf) < 0) { + err = error("%s", errbuf.buf); + goto out; + } + + err = 0; + +out: + strbuf_release(&errbuf); + return err; +} + +int cmd_refs(int argc, const char **argv, const char *prefix) +{ + const char * const refs_usage[] = { + REFS_MIGRATE_USAGE, + NULL, + }; + parse_opt_subcommand_fn *fn = NULL; + struct option opts[] = { + OPT_SUBCOMMAND("migrate", &fn, cmd_refs_migrate), + OPT_END(), + }; + + argc = parse_options(argc, argv, prefix, opts, refs_usage, 0); + return fn(argc, argv, prefix); +} |