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better indicate when special remotes do not support renameExport

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Avoid a warning message when renameExport is not supported, and just
fallback to deleting with a subsequent re-upload. Especially needed for
importtree remotes, where renameExport needs to be disabled.

This changes the external special remote protocol, but in a
backwards-compatible way. A reply of UNSUPPORTED-REQUEST to an older
version of git-annex will cause it to make renameExport return False.
This commit is contained in:
Joey Hess 2019-03-11 12:44:12 -04:00
parent c755788256
commit 2912429640
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GPG key ID: DB12DB0FF05F8F38
11 changed files with 62 additions and 53 deletions
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6
Types/Remote.hs
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@ -242,9 +242,9 @@ data ExportActions a = ExportActions
-- Throws an exception if the remote cannot be accessed.
, checkPresentExport :: Key -> ExportLocation -> a Bool
-- Renames an already exported file.
-- This may fail, if the file doesn't exist, or the remote does not
-- support renames.
, renameExport :: Key -> ExportLocation -> ExportLocation -> a Bool
-- This may fail with False, if the file doesn't exist.
-- If the remote does not support renames, it can return Nothing.
, renameExport :: Key -> ExportLocation -> ExportLocation -> a (Maybe Bool)
}
data ImportActions a = ImportActions