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25a0023f28
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>
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
#include "builtin.h"
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#include "parse-options.h"
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#include "refs.h"
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#include "repository.h"
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#include "strbuf.h"
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#define REFS_MIGRATE_USAGE \
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N_("git refs migrate --ref-format=<format> [--dry-run]")
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static int cmd_refs_migrate(int argc, const char **argv, const char *prefix)
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{
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const char * const migrate_usage[] = {
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REFS_MIGRATE_USAGE,
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NULL,
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};
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const char *format_str = NULL;
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enum ref_storage_format format;
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unsigned int flags = 0;
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struct option options[] = {
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OPT_STRING_F(0, "ref-format", &format_str, N_("format"),
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N_("specify the reference format to convert to"),
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PARSE_OPT_NONEG),
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OPT_BIT(0, "dry-run", &flags,
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N_("perform a non-destructive dry-run"),
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REPO_MIGRATE_REF_STORAGE_FORMAT_DRYRUN),
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OPT_END(),
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};
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struct strbuf errbuf = STRBUF_INIT;
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int err;
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argc = parse_options(argc, argv, prefix, options, migrate_usage, 0);
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if (argc)
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usage(_("too many arguments"));
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if (!format_str)
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usage(_("missing --ref-format=<format>"));
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format = ref_storage_format_by_name(format_str);
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if (format == REF_STORAGE_FORMAT_UNKNOWN) {
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err = error(_("unknown ref storage format '%s'"), format_str);
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goto out;
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}
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if (the_repository->ref_storage_format == format) {
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err = error(_("repository already uses '%s' format"),
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ref_storage_format_to_name(format));
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goto out;
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}
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if (repo_migrate_ref_storage_format(the_repository, format, flags, &errbuf) < 0) {
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err = error("%s", errbuf.buf);
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goto out;
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}
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err = 0;
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out:
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strbuf_release(&errbuf);
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return err;
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}
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int cmd_refs(int argc, const char **argv, const char *prefix)
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{
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const char * const refs_usage[] = {
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REFS_MIGRATE_USAGE,
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NULL,
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};
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parse_opt_subcommand_fn *fn = NULL;
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struct option opts[] = {
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OPT_SUBCOMMAND("migrate", &fn, cmd_refs_migrate),
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OPT_END(),
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};
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argc = parse_options(argc, argv, prefix, opts, refs_usage, 0);
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return fn(argc, argv, prefix);
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}
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