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fix(nix/dependency-analyzer): ignore non-drv paths for Nix < 2.6

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Looking for .drv file names in non .drv files doesn't make sense, as it
less reliably a reference in those cases. Matches behavior of the
function for Nix >= 2.6.

Change-Id: I79fc1da3e55df869f03702fa5137d030790bc4eb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11114
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: aspen <root@gws.fyi>
This commit is contained in:
sterni 2024-03-09 00:17:44 +01:00 committed by clbot
parent d1da9f5c84
commit 4a91197802
1 changed files with 29 additions and 24 deletions
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53
nix/dependency-analyzer/default.nix
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@ -16,30 +16,35 @@ let
#
# TODO(sterni): clean this up and expose it
directDrvDeps =
if lib.versionAtLeast builtins.nixVersion "2.6"
then
# Since https://github.com/NixOS/nix/pull/1643, Nix apparently »preserves
# string context« through a readFile invocation. This has the side effect
# that it becomes possible to query the actual references a store path has.
# Not a 100% sure this is intended, but _very_ convenient for us here.
drvPath:
# if the passed path is not a derivation we can't necessarily get its
# dependencies, since it may not be representable as a Nix string due to
# NUL bytes, e.g. compressed patch files imported into the Nix store.
if builtins.match "^.+\\.drv$" drvPath == null
then [ ]
else builtins.attrNames (builtins.getContext (builtins.readFile drvPath))
else
# For Nix < 2.6 we have to rely on HACK, namely grepping for quoted store
# path references in the file. In the future this should be replaced by
# a proper derivation parser.
drvPath: builtins.concatLists (
builtins.filter builtins.isList (
builtins.split
"\"(${lib.escapeRegex builtins.storeDir}/[[:alnum:]+._?=-]+.drv)\""
(builtins.readFile drvPath)
)
);
let
getDeps =
if lib.versionAtLeast builtins.nixVersion "2.6"
then
# Since https://github.com/NixOS/nix/pull/1643, Nix apparently »preserves
# string context« through a readFile invocation. This has the side effect
# that it becomes possible to query the actual references a store path has.
# Not a 100% sure this is intended, but _very_ convenient for us here.
drvPath:
builtins.attrNames (builtins.getContext (builtins.readFile drvPath))
else
# For Nix < 2.6 we have to rely on HACK, namely grepping for quoted
# store path references in the file. In the future this should be
# replaced by a proper derivation parser.
drvPath: builtins.concatLists (
builtins.filter builtins.isList (
builtins.split
"\"(${lib.escapeRegex builtins.storeDir}/[[:alnum:]+._?=-]+.drv)\""
(builtins.readFile drvPath)
)
);
in
drvPath:
# if the passed path is not a derivation we can't necessarily get its
# dependencies, since it may not be representable as a Nix string due to
# NUL bytes, e.g. compressed patch files imported into the Nix store.
if builtins.match "^.+\\.drv$" drvPath == null
then [ ]
else getDeps drvPath;
# Maps a list of derivation to the list of corresponding `drvPath`s.
#