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Start storing and identifying sets of derivation outputs

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Derivations are effectively equivalent if they produce the same set of
outputs, which is possible because of the equivalence of fixed output
derivations. A fixed output derivation can be different, but equivalent,
because it produces the same fixed output.

To better allow tracking equivalent derivations, primarily to allow working
out what derivations might correspond to a build, store the sets of derivation
outputs, and which derivations they relate to.
This commit is contained in:
Christopher Baines 2019-12-07 19:21:02 +01:00
parent 0e97c55c0c
commit a965ba1f6a
5 changed files with 129 additions and 13 deletions
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@ -36,3 +36,4 @@ change_nars_size_to_bigint 2019-12-04T21:24:21Z <chris@phact> # Change nars.si
change_nar_urls_size_to_bigint 2019-12-04T21:49:07Z <chris@phact> # Change nar_urls.size to bigint
sort_out_duplicate_builds 2019-12-05T12:43:53Z <chris@phact> # Sort out duplicate builds
add_some_database_indexes 2019-12-05T15:53:04Z Christopher Baines <mail@cbaines.net> # Add some indexes
derivation_output_sets 2019-12-05T23:19:05Z Christopher Baines <mail@cbaines.net> # Describe the sets of derivation outputs