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git/Documentation/git-refs.txt
Karthik Nayak 89be7d2774 builtin/refs: add '--no-reflog' flag to drop reflogs
The "git refs migrate" subcommand converts the backend used for ref
storage. It always migrates reflog data as well as refs. Introduce an
option to exclude reflogs from migration, allowing them to be discarded
when they are unnecessary.

This is particularly useful in server-side repositories, where reflogs
are typically not expected. However, some repositories may still have
them due to historical reasons, such as bugs, misconfigurations, or
administrative decisions to enable reflogs for debugging. In such
repositories, it would be optimal to drop reflogs during the migration.

To address this, introduce the '--no-reflog' flag, which prevents reflog
migration. When this flag is used, reflogs from the original reference
backend are migrated. Since only the new reference backend remains in
the repository, all previous reflogs are permanently discarded.

Helped-by: Junio C Hamano <gitster@pobox.com>
Helped-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-02-21 09:55:02 -08:00

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git-refs(1)
===========
NAME
----
git-refs - Low-level access to refs
SYNOPSIS
--------
[synopsis]
git refs migrate --ref-format=<format> [--no-reflog] [--dry-run]
git refs verify [--strict] [--verbose]
DESCRIPTION
-----------
This command provides low-level access to refs.
COMMANDS
--------
migrate::
Migrate ref store between different formats.
verify::
Verify reference database consistency.
OPTIONS
-------
The following options are specific to 'git refs migrate':
--ref-format=<format>::
The ref format to migrate the ref store to. Can be one of:
+
include::ref-storage-format.txt[]
--dry-run::
Perform the migration, but do not modify the repository. The migrated
refs will be written into a separate directory that can be inspected
separately. The name of the directory will be reported on stdout. This
can be used to double check that the migration works as expected before
performing the actual migration.
--reflog::
--no-reflog::
Choose between migrating the reflog data to the new backend,
and discarding them. The default is "--reflog", to migrate.
The following options are specific to 'git refs verify':
--strict::
Enable stricter error checking. This will cause warnings to be
reported as errors. See linkgit:git-fsck[1].
--verbose::
When verifying the reference database consistency, be chatty.
KNOWN LIMITATIONS
-----------------
The ref format migration has several known limitations in its current form:
* It is not possible to migrate repositories that have worktrees.
* There is no way to block concurrent writes to the repository during an
ongoing migration. Concurrent writes can lead to an inconsistent migrated
state. Users are expected to block writes on a higher level. If your
repository is registered for scheduled maintenance, it is recommended to
unregister it first with git-maintenance(1).
These limitations may eventually be lifted.
GIT
---
Part of the linkgit:git[1] suite