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Support fixed-output derivations depending on impure derivations

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This commit is contained in:
Eelco Dolstra 2022-03-11 13:23:23 +01:00
parent 5cd72598fe
commit 18935e8b9f
4 changed files with 48 additions and 9 deletions
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7
src/libstore/build/derivation-goal.cc
View file

@ -342,9 +342,9 @@ void DerivationGoal::gaveUpOnSubstitution()
inputDrvOutputs.clear();
if (useDerivation)
for (auto & i : dynamic_cast<Derivation *>(drv.get())->inputDrvs) {
/* Ensure that pure derivations don't depend on impure
derivations. */
if (drv->type().isPure()) {
/* Ensure that pure, non-fixed-output derivations don't
depend on impure derivations. */
if (drv->type().isPure() && !drv->type().isFixed()) {
auto inputDrv = worker.evalStore.readDerivation(i.first);
if (!inputDrv.type().isPure())
throw Error("pure derivation '%s' depends on impure derivation '%s'",
@ -993,6 +993,7 @@ void DerivationGoal::resolvedFinished()
auto newRealisation = realisation;
newRealisation.id = DrvOutput { initialOutputs.at(wantedOutput).outputHash, wantedOutput };
newRealisation.signatures.clear();
if (!drv->type().isFixed())
newRealisation.dependentRealisations = drvOutputReferences(worker.store, *drv, realisation.outPath);
signRealisation(newRealisation);
worker.store.registerDrvOutput(newRealisation);

7
src/libstore/misc.cc
View file

@ -277,15 +277,15 @@ std::map<DrvOutput, StorePath> drvOutputReferences(
{
std::set<Realisation> inputRealisations;
for (const auto& [inputDrv, outputNames] : drv.inputDrvs) {
for (const auto & [inputDrv, outputNames] : drv.inputDrvs) {
auto outputHashes =
staticOutputHashes(store, store.readDerivation(inputDrv));
for (const auto& outputName : outputNames) {
for (const auto & outputName : outputNames) {
auto thisRealisation = store.queryRealisation(
DrvOutput{outputHashes.at(outputName), outputName});
if (!thisRealisation)
throw Error(
"output '%s' of derivation '%s' isn’t built", outputName,
"output '%s' of derivation '%s' isn't built", outputName,
store.printStorePath(inputDrv));
inputRealisations.insert(*thisRealisation);
}
@ -295,4 +295,5 @@ std::map<DrvOutput, StorePath> drvOutputReferences(
return drvOutputReferences(Realisation::closure(store, inputRealisations), info->references);
}
}

22
tests/impure-derivations.nix
View file

@ -7,6 +7,7 @@ rec {
outputs = [ "out" "stuff" ];
buildCommand =
''
echo impure
x=$(< $TEST_ROOT/counter)
mkdir $out $stuff
echo $x > $out/n
@ -23,6 +24,7 @@ rec {
name = "impure-on-impure";
buildCommand =
''
echo impure-on-impure
x=$(< ${impure}/n)
mkdir $out
printf X$x > $out/n
@ -43,4 +45,24 @@ rec {
'';
};
contentAddressed = mkDerivation {
name = "content-addressed";
buildCommand =
''
echo content-addressed
x=$(< ${impureOnImpure}/n)
printf ''${x:0:1} > $out
'';
outputHashAlgo = "sha256";
outputHashMode = "recursive";
outputHash = "sha256-eBYxcgkuWuiqs4cKNgKwkb3vY/HR0vVsJnqe8itJGcQ=";
};
inputAddressedAfterCA = mkDerivation {
name = "input-addressed-after-ca";
buildCommand =
''
cat ${contentAddressed} > $out
'';
};
}

19
tests/impure-derivations.sh
View file

@ -21,10 +21,10 @@ path2=$(nix build -L --no-link --json --file ./impure-derivations.nix impure | j
[[ $(< $path2/n) = 1 ]]
# Test impure derivations that depend on impure derivations.
path3=$(nix build -L --no-link --json --file ./impure-derivations.nix impureOnImpure -vvvvv | jq -r .[].outputs.out)
path3=$(nix build -L --no-link --json --file ./impure-derivations.nix impureOnImpure | jq -r .[].outputs.out)
[[ $(< $path3/n) = X2 ]]
path4=$(nix build -L --no-link --json --file ./impure-derivations.nix impureOnImpure -vvvvv | jq -r .[].outputs.out)
path4=$(nix build -L --no-link --json --file ./impure-derivations.nix impureOnImpure | jq -r .[].outputs.out)
[[ $(< $path4/n) = X3 ]]
# Test that (self-)references work.
@ -37,3 +37,18 @@ nix build -L --no-link --json --file ./impure-derivations.nix inputAddressed 2>&
drvPath=$(nix eval --json --file ./impure-derivations.nix impure.drvPath | jq -r .)
[[ $(nix show-derivation $drvPath | jq ".[\"$drvPath\"].outputs.out.impure") = true ]]
[[ $(nix show-derivation $drvPath | jq ".[\"$drvPath\"].outputs.stuff.impure") = true ]]
# Fixed-output derivations *can* depend on impure derivations.
path5=$(nix build -L --no-link --json --file ./impure-derivations.nix contentAddressed | jq -r .[].outputs.out)
[[ $(< $path5) = X ]]
[[ $(< $TEST_ROOT/counter) = 5 ]]
# And they should not be rebuilt.
path5=$(nix build -L --no-link --json --file ./impure-derivations.nix contentAddressed | jq -r .[].outputs.out)
[[ $(< $path5) = X ]]
[[ $(< $TEST_ROOT/counter) = 5 ]]
# Input-addressed derivations can depend on fixed-output derivations that depend on impure derivations.
path6=$(nix build -L --no-link --json --file ./impure-derivations.nix inputAddressedAfterCA | jq -r .[].outputs.out)
[[ $(< $path6) = X ]]
[[ $(< $TEST_ROOT/counter) = 5 ]]