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buildPaths(): Add an evalStore argument

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With this, we don't have to copy the entire .drv closure to the
destination store ahead of time (or at all). Instead, buildPaths()
reads .drv files from the eval store and copies inputSrcs to the
destination store if it needs to build a derivation.

Issue #5025.
This commit is contained in:
Eelco Dolstra 2021-07-19 15:43:08 +02:00
parent 668abd3e57
commit eb6db4fd38
13 changed files with 55 additions and 38 deletions
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18
src/nix/develop.cc
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@ -171,15 +171,15 @@ const static std::string getEnvSh =
modified derivation with the same dependencies and nearly the same
initial environment variables, that just writes the resulting
environment to a file and exits. */
StorePath getDerivationEnvironment(ref<Store> store, const StorePath & drvPath)
static StorePath getDerivationEnvironment(ref<Store> store, ref<Store> evalStore, const StorePath & drvPath)
{
auto drv = store->derivationFromPath(drvPath);
auto drv = evalStore->derivationFromPath(drvPath);
auto builder = baseNameOf(drv.builder);
if (builder != "bash")
throw Error("'nix develop' only works on derivations that use 'bash' as their builder");
auto getEnvShPath = store->addTextToStore("get-env.sh", getEnvSh, {});
auto getEnvShPath = evalStore->addTextToStore("get-env.sh", getEnvSh, {});
drv.args = {store->printStorePath(getEnvShPath)};
@ -205,7 +205,7 @@ StorePath getDerivationEnvironment(ref<Store> store, const StorePath & drvPath)
output.second = { .output = DerivationOutputInputAddressed { .path = StorePath::dummy } };
drv.env[output.first] = "";
}
Hash h = std::get<0>(hashDerivationModulo(*store, drv, true));
Hash h = std::get<0>(hashDerivationModulo(*evalStore, drv, true));
for (auto & output : drv.outputs) {
auto outPath = store->makeOutputPath(output.first, h, drv.name);
@ -214,12 +214,12 @@ StorePath getDerivationEnvironment(ref<Store> store, const StorePath & drvPath)
}
}
auto shellDrvPath = writeDerivation(*store, drv);
auto shellDrvPath = writeDerivation(*evalStore, drv);
/* Build the derivation. */
store->buildPaths({DerivedPath::Built{shellDrvPath}});
store->buildPaths({DerivedPath::Built{shellDrvPath}}, bmNormal, evalStore);
for (auto & [_0, optPath] : store->queryPartialDerivationOutputMap(shellDrvPath)) {
for (auto & [_0, optPath] : evalStore->queryPartialDerivationOutputMap(shellDrvPath)) {
assert(optPath);
auto & outPath = *optPath;
assert(store->isValidPath(outPath));
@ -347,7 +347,7 @@ struct Common : InstallableCommand, MixProfile
auto & drvPath = *drvs.begin();
return getDerivationEnvironment(store, drvPath);
return getDerivationEnvironment(store, getEvalStore(), drvPath);
}
}
@ -361,7 +361,7 @@ struct Common : InstallableCommand, MixProfile
debug("reading environment file '%s'", strPath);
return {BuildEnvironment::fromJSON(readFile(strPath)), strPath};
return {BuildEnvironment::fromJSON(readFile(store->toRealPath(shellOutPath))), strPath};
}
};