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docs: clarify that refs/notes/ do not keep the attached objects alive

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`git help gc` contains this snippet:

  "[...] it will keep [..] objects referenced by the index,
  remote-tracking branches, notes saved by git notes under refs/notes/"

I had interpreted that as saying that the objects that notes were
attached to are kept, but that is not the case. Let's clarify the
documentation by moving out the part about git notes to a separate
sentence.

Signed-off-by: Martin von Zweigbergk <martinvonz@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Martin von Zweigbergk 2021-02-10 23:39:14 -08:00 committed by Junio C Hamano
parent 773e25afc4
commit fa9ab027ba
1 changed files with 8 additions and 6 deletions
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14
Documentation/git-gc.txt
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@ -117,12 +117,14 @@ NOTES
'git gc' tries very hard not to delete objects that are referenced
anywhere in your repository. In particular, it will keep not only
objects referenced by your current set of branches and tags, but also
objects referenced by the index, remote-tracking branches, notes saved
by 'git notes' under refs/notes/, reflogs (which may reference commits
in branches that were later amended or rewound), and anything else in
the refs/* namespace. If you are expecting some objects to be deleted
and they aren't, check all of those locations and decide whether it
makes sense in your case to remove those references.
objects referenced by the index, remote-tracking branches, reflogs
(which may reference commits in branches that were later amended or
rewound), and anything else in the refs/* namespace. Note that a note
(of the kind created by 'git notes') attached to an object does not
contribute in keeping the object alive. If you are expecting some
objects to be deleted and they aren't, check all of those locations
and decide whether it makes sense in your case to remove those
references.
On the other hand, when 'git gc' runs concurrently with another process,
there is a risk of it deleting an object that the other process is using