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only delete bundles on pushEmpty

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This avoids some apparently otherwise unsolveable problems involving
races that resulted in the manifest listing bundles that were deleted.

Removed the annex-max-git-bundles config because it can't actually
result in deleting old bundles. It would still be possible to have a
config that controls how often to do a full push, which would avoid
needing to download too many bundles on clone, as well as needing to
checkpresent too many bundles in verifyManifest. But it would need a
different name and description.
This commit is contained in:
Joey Hess 2024-05-21 10:41:48 -04:00
parent f544946b09
commit 3e7324bbcb
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13
doc/internals/git-remote-annex.mdwn
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@ -43,6 +43,13 @@ stored in such a special remote, this procedure will work:
(Note that later bundles can update refs from the versions in previous
bundles.)
When the special remote is encrypted, the GITMANIFEST and GITBUNDLE will
also be encrypted. To decrypt those manually, see this
[[fairly simple shell script using standard tools|tips/Decrypting_files_in_special_remotes_without_git-annex]].
Note that, if a GITBUNDLE listed in the GITMANIFEST turns out not to exist,
a clone should treat this the same as if the GITMANIFEST were empty.
bundle objects are deleted when a push is made to the remote that
deletes all refs from it, and in a race between such a push and another
push of some refs, it is possible for the GITMANIFEST to refer to deleted
bundles.
When the special remote is encrypted, both the names and content of
the GITMANIFEST and GITBUNDLE will also be encrypted. To
decrypt those manually, see this [[fairly simple shell script using standard tools|tips/Decrypting_files_in_special_remotes_without_git-annex]].