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This includes storing the current state of the HEAD ref, which git annex sync is going to need, but does not make sync use it.
106 lines
3.4 KiB
Markdown
106 lines
3.4 KiB
Markdown
Occasionally improvments are made to how git-annex stores its data,
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that require an upgrade process to convert repositories made with an older
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version to be used by a newer version. It's annoying, it should happen
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rarely, but sometimes, it's worth it.
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There's a committment that git-annex will always support upgrades from all
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past versions. After all, you may have offline drives from an earlier
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git-annex, and might want to use them with a newer git-annex.
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git-annex will notice if it is run in a repository that
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needs an upgrade, and refuse to do anything. To upgrade,
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use the "git annex upgrade" command.
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The upgrade process is guaranteed to be conflict-free. Unless you
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already have git conflicts in your repository or between repositories.
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Upgrading a repository with conflicts is not recommended; resolve the
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conflicts first before upgrading git-annex.
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## Upgrade events, so far
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### v4 -> v5 (git-annex version 5.x)
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v5 is only used for [[direct_mode]]. The upgrade from v4 to v5 is handled
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automatically.
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This upgrade involves changing direct mode repositories to operate with
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core.bare=true.
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### v3 -> v4 (git-annex version 4.x)
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v4 was only used for [[direct_mode]], to ensure that a version of git-annex
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that understands direct mode was used with a direct mode repository.
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### v2 -> v3 (git-annex version 3.x)
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Involved moving the .git-annex/ directory into a separate git-annex branch.
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After this upgrade, you should make sure you include the git-annex branch
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when git pushing and pulling.
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### tips for this upgrade
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This upgrade is easier (and faster!) than the previous upgrades.
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You don't need to upgrade every repository at once; it's sufficient
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to upgrade each repository only when you next use it.
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Example upgrade process:
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cd localrepo
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git pull
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git annex upgrade
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git commit -m "upgrade v2 to v3"
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git gc
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### v1 -> v2 (git-annex version 0.20110316)
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Involved adding hashing to .git/annex/ and changing the names of all keys.
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Symlinks changed.
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Also, hashing was added to location log files in .git-annex/.
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And .gitattributes needed to have another line added to it.
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Previously, files added to the SHA [[backends]] did not have their file
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size tracked, while files added to the WORM backend did. Files added to
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the SHA backends after the conversion will have their file size tracked,
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and that information will be used by git-annex for disk free space checking.
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To ensure that information is available for all your annexed files, see
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[[upgrades/SHA_size]].
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### tips for this upgrade
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This upgrade can tend to take a while, if you have a lot of files.
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Each clone of a repository should be individually upgraded.
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Until a repository's remotes have been upgraded, git-annex
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will refuse to communicate with them.
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Start by upgrading one repository, and then you can commit
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the changes git-annex staged during upgrade, and push them out to other
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repositories. And then upgrade those other repositories. Doing it this
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way avoids git-annex doing some duplicate work during the upgrade.
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Example upgrade process:
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cd localrepo
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git pull
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git annex upgrade
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git commit -m "upgrade v1 to v2"
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git push
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ssh remote
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cd remoterepo
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git pull
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git annex upgrade
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...
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### v0 -> v1 (git-annex version 0.04)
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Involved a reorganisation of the layout of .git/annex/. Symlinks changed.
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Handled more or less transparently, although git-annex was just 2 weeks
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old at the time, and had few users other than Joey.
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Before doing this upgrade, set annex.version:
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git config annex.version 0
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