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Store metadata about drv outputs realisations

For each known realisation, store:
- its output
- its output path

This comes with a set of needed changes:

- New `realisations` module declaring the types needed for describing
  these mappings
- New `Store::registerDrvOutput` method registering all the needed informations
  about a derivation output (also replaces `LocalStore::linkDeriverToPath`)
- new `Store::queryRealisation` method to retrieve the informations for a
  derivations

This introcudes some redundancy on the remote-store side between
`wopQueryDerivationOutputMap` and `wopQueryRealisation`.
However we might need to keep both (regardless of backwards compat)
because we sometimes need to get some infos for all the outputs of a
derivation (where `wopQueryDerivationOutputMap` is handy), but all the
stores can't implement it − because listing all the outputs of a
derivation isn't really possible for binary caches where the server
doesn't allow to list a directory.
This commit is contained in:
regnat 2020-10-08 17:36:51 +02:00
parent 9c143c411b
commit 58cdab64ac
16 changed files with 248 additions and 12 deletions

View file

@ -55,7 +55,8 @@ testNixCommand () {
nix build --experimental-features 'nix-command ca-derivations' --file ./content-addressed.nix --no-link
}
testRemoteCache
# Disabled until we have it properly working
# testRemoteCache
testDeterministicCA
testCutoff
testGC