git-annex/doc/devblog/day_292__dead_keys.mdwn
2015-06-09 15:59:03 -04:00

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Ever since `git annex fsck --all` was added, people
[have](http://bugs.debian.org/753888)
[[complained|bugs/fsck_reports_unsolvable_problem]] that
there's no way to stop it complaining about keys whose content is gone for
good. Well, there is now: `git annex dead --key` can be used when you know
that a key is no longer available and want fsck to stop complaining about
it.
Running fsck on a directory will intentionally still complain about files
in the directory with missing contents, even if the keys have been marked
dead.
The crucial part was finding a good way to store the information; luckily
location log files are parsed in a way that lets it be added there without
breaking backwards compatability. A bonus is that adding a key's content
back to the annex will automatically bring it back from the dead.
I'm pondering making `git annex drop --force` automatically mark a key as
dead when the last copy is dropped, but I don't know if it's too DWIM or
worth the complication. Another approach would be to let fsck mark keys as
dead, but that would certianly need an extra flag.