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added addurl suggestions

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Ilya_Shlyakhter 2018-10-28 20:32:25 +00:00 • committed by admin
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When an external special remote tells git-annex a fuller URL for a given file, git-annex-addurl does not use that information:
[2018-10-28 16:12:39.933464] git-annex-remote-dnanexus[1] <-- CLAIMURL dx://file-FJZjVx001pB2BQPVKY4zX8kk/
[2018-10-28 16:12:39.933515] git-annex-remote-dnanexus[1] --> CLAIMURL-SUCCESS
[2018-10-28 16:12:39.933568] git-annex-remote-dnanexus[1] <-- CHECKURL dx://file-FJZjVx001pB2BQPVKY4zX8kk/
[2018-10-28 16:12:40.469292] git-annex-remote-dnanexus[1] --> CHECKURL-MULTI dx://file-FJZjVx001pB2BQPVKY4zX8kk/A4.assembly1-trinity.fasta 11086 A4.assembly1-trinity.fasta
addurl dx://file-FJZjVx001pB2BQPVKY4zX8kk/ (from mydx) (to A4.assembly1_trinity.fasta) [2018-10-28 16:12:40.469503] read: git ["--version"]
It would be better if, in the above log, the URL key was based on dx://file-FJZjVx001pB2BQPVKY4zX8kk/A4.assembly1-trinity.fasta , which would preserve the .fasta extension in the key and therefore in the symlink target.
Also, it would be good if the external special remote could return an etag for the URL, which would be a value guaranteed to change if the URL's contents changes;
and if git-annex would then compute the URL key based on the combination of URL and etag.
It'd also be good if there was a option to automatically migrate URL keys to the default backend whenever a file from a URL key is downloaded. Also, to record
the checksummed key (e.g. MD5E) as metadata of the URL key (in a field named e.g. alternateKeys), and if addurl --fast is later done on a URL key for which
a checksummed key is recorded in the metadata, to add the checksummed key instead of the URL key .