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builtin/refs: new command to migrate ref storage formats

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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>
This commit is contained in:
Patrick Steinhardt
2024-06-06 07:29:49 +02:00
committed by Junio C Hamano
parent 6d6a3a99c7
commit 25a0023f28
8 changed files with 384 additions and 0 deletions
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git.c
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@ -594,6 +594,7 @@ static struct cmd_struct commands[] = {
{ "rebase", cmd_rebase, RUN_SETUP | NEED_WORK_TREE },
{ "receive-pack", cmd_receive_pack },
{ "reflog", cmd_reflog, RUN_SETUP },
{ "refs", cmd_refs, RUN_SETUP },
{ "remote", cmd_remote, RUN_SETUP },
{ "remote-ext", cmd_remote_ext, NO_PARSEOPT },
{ "remote-fd", cmd_remote_fd, NO_PARSEOPT },