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Prepare support of new hashing algorithms for browsing objects

Currently, the following object types can be browsed from their sha1_git checksums only:

  • directory
  • revision
  • release

In the future, object identifiers will be computed using other hashing algorithms (sha256 for instance) so we must prepare the webapp to handle those for browsing archived objects.

We could use the same solution as for browsing contents objects. Indeed each content has four checksums computed for it: sha1, sha1_git, sha256 and blake2s256. The webapp then enables to browse a content from each computed checksum using the following URL: /browse/content/(algo):(hash)/

Migrated from T2435 (view on Phabricator)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information