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Merge pull request #6227 from NixOS/impure-derivations-ng

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Impure derivations
This commit is contained in:
Eelco Dolstra 2022-03-31 19:58:35 +02:00 • committed by GitHub
commit c9a29d0d92
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19 changed files with 562 additions and 169 deletions
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1
src/libexpr/eval.cc
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@ -436,6 +436,7 @@ EvalState::EvalState(
, sBuilder(symbols.create("builder"))
, sArgs(symbols.create("args"))
, sContentAddressed(symbols.create("__contentAddressed"))
, sImpure(symbols.create("__impure"))
, sOutputHash(symbols.create("outputHash"))
, sOutputHashAlgo(symbols.create("outputHashAlgo"))
, sOutputHashMode(symbols.create("outputHashMode"))

2
src/libexpr/eval.hh
View file

@ -78,7 +78,7 @@ public:
sSystem, sOverrides, sOutputs, sOutputName, sIgnoreNulls,
sFile, sLine, sColumn, sFunctor, sToString,
sRight, sWrong, sStructuredAttrs, sBuilder, sArgs,
sContentAddressed,
sContentAddressed, sImpure,
sOutputHash, sOutputHashAlgo, sOutputHashMode,
sRecurseForDerivations,
sDescription, sSelf, sEpsilon, sStartSet, sOperator, sKey, sPath,

47
src/libexpr/primops.cc
View file

@ -989,9 +989,10 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
PathSet context;
bool contentAddressed = false;
bool isImpure = false;
std::optional<std::string> outputHash;
std::string outputHashAlgo;
auto ingestionMethod = FileIngestionMethod::Flat;
std::optional<std::string> outputHashAlgo;
std::optional<FileIngestionMethod> ingestionMethod;
StringSet outputs;
outputs.insert("out");
@ -1051,6 +1052,12 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
settings.requireExperimentalFeature(Xp::CaDerivations);
}
else if (i->name == state.sImpure) {
isImpure = state.forceBool(*i->value, pos);
if (isImpure)
settings.requireExperimentalFeature(Xp::ImpureDerivations);
}
/* The `args' attribute is special: it supplies the
command-line arguments to the builder. */
else if (i->name == state.sArgs) {
@ -1183,29 +1190,45 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
.errPos = posDrvName
});
std::optional<HashType> ht = parseHashTypeOpt(outputHashAlgo);
std::optional<HashType> ht = parseHashTypeOpt(outputHashAlgo.value_or("sha256"));
Hash h = newHashAllowEmpty(*outputHash, ht);
auto outPath = state.store->makeFixedOutputPath(ingestionMethod, h, drvName);
auto method = ingestionMethod.value_or(FileIngestionMethod::Flat);
auto outPath = state.store->makeFixedOutputPath(method, h, drvName);
drv.env["out"] = state.store->printStorePath(outPath);
drv.outputs.insert_or_assign("out",
DerivationOutput::CAFixed {
.hash = FixedOutputHash {
.method = ingestionMethod,
.method = method,
.hash = std::move(h),
},
});
}
else if (contentAddressed) {
HashType ht = parseHashType(outputHashAlgo);
else if (contentAddressed || isImpure) {
if (contentAddressed && isImpure)
throw EvalError({
.msg = hintfmt("derivation cannot be both content-addressed and impure"),
.errPos = posDrvName
});
auto ht = parseHashType(outputHashAlgo.value_or("sha256"));
auto method = ingestionMethod.value_or(FileIngestionMethod::Recursive);
for (auto & i : outputs) {
drv.env[i] = hashPlaceholder(i);
drv.outputs.insert_or_assign(i,
DerivationOutput::CAFloating {
.method = ingestionMethod,
.hashType = ht,
});
if (isImpure)
drv.outputs.insert_or_assign(i,
DerivationOutput::Impure {
.method = method,
.hashType = ht,
});
else
drv.outputs.insert_or_assign(i,
DerivationOutput::CAFloating {
.method = method,
.hashType = ht,
});
}
}