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f3e1c47f47
The short answer for why we need to do this is so we can consistently do `#include "nix/..."`. Without this change, there are ways to still make that work, but they are hacky, and they have downsides such as making it harder to make sure headers from the wrong Nix library (e..g. `libnixexpr` headers in `libnixutil`) aren't being used. The C API alraedy used `nix_api_*`, so its headers are *not* put in subdirectories accordingly. Progress on #7876 We resisted doing this for a while because it would be annoying to not have the header source file pairs close by / easy to change file path/name from one to the other. But I am ameliorating that with symlinks in the next commit.
124 lines
3.6 KiB
C++
124 lines
3.6 KiB
C++
#include "nix/globals.hh"
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#include "nix/installable-attr-path.hh"
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#include "nix/outputs-spec.hh"
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#include "nix/util.hh"
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#include "nix/command.hh"
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#include "nix/attr-path.hh"
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#include "nix/common-eval-args.hh"
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#include "nix/derivations.hh"
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#include "nix/eval-inline.hh"
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#include "nix/eval.hh"
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#include "nix/get-drvs.hh"
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#include "nix/store-api.hh"
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#include "nix/shared.hh"
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#include "nix/flake/flake.hh"
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#include "nix/eval-cache.hh"
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#include "nix/url.hh"
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#include "nix/registry.hh"
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#include "nix/build-result.hh"
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#include <regex>
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#include <queue>
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#include <nlohmann/json.hpp>
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namespace nix {
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InstallableAttrPath::InstallableAttrPath(
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ref<EvalState> state,
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SourceExprCommand & cmd,
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Value * v,
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const std::string & attrPath,
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ExtendedOutputsSpec extendedOutputsSpec)
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: InstallableValue(state)
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, cmd(cmd)
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, v(allocRootValue(v))
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, attrPath(attrPath)
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, extendedOutputsSpec(std::move(extendedOutputsSpec))
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{ }
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std::pair<Value *, PosIdx> InstallableAttrPath::toValue(EvalState & state)
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{
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auto [vRes, pos] = findAlongAttrPath(state, attrPath, *cmd.getAutoArgs(state), **v);
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state.forceValue(*vRes, pos);
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return {vRes, pos};
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}
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DerivedPathsWithInfo InstallableAttrPath::toDerivedPaths()
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{
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auto [v, pos] = toValue(*state);
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if (std::optional derivedPathWithInfo = trySinglePathToDerivedPaths(
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*v,
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pos,
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fmt("while evaluating the attribute '%s'", attrPath)))
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{
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return { *derivedPathWithInfo };
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}
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Bindings & autoArgs = *cmd.getAutoArgs(*state);
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PackageInfos packageInfos;
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getDerivations(*state, *v, "", autoArgs, packageInfos, false);
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// Backward compatibility hack: group results by drvPath. This
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// helps keep .all output together.
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std::map<StorePath, OutputsSpec> byDrvPath;
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for (auto & packageInfo : packageInfos) {
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auto drvPath = packageInfo.queryDrvPath();
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if (!drvPath)
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throw Error("'%s' is not a derivation", what());
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auto newOutputs = std::visit(overloaded {
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[&](const ExtendedOutputsSpec::Default & d) -> OutputsSpec {
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std::set<std::string> outputsToInstall;
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for (auto & output : packageInfo.queryOutputs(false, true))
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outputsToInstall.insert(output.first);
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if (outputsToInstall.empty())
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outputsToInstall.insert("out");
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return OutputsSpec::Names { std::move(outputsToInstall) };
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},
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[&](const ExtendedOutputsSpec::Explicit & e) -> OutputsSpec {
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return e;
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},
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}, extendedOutputsSpec.raw);
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auto [iter, didInsert] = byDrvPath.emplace(*drvPath, newOutputs);
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if (!didInsert)
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iter->second = iter->second.union_(newOutputs);
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}
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DerivedPathsWithInfo res;
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for (auto & [drvPath, outputs] : byDrvPath)
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res.push_back({
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.path = DerivedPath::Built {
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.drvPath = makeConstantStorePathRef(drvPath),
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.outputs = outputs,
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},
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.info = make_ref<ExtraPathInfoValue>(ExtraPathInfoValue::Value {
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.extendedOutputsSpec = outputs,
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/* FIXME: reconsider backwards compatibility above
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so we can fill in this info. */
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}),
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});
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return res;
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}
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InstallableAttrPath InstallableAttrPath::parse(
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ref<EvalState> state,
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SourceExprCommand & cmd,
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Value * v,
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std::string_view prefix,
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ExtendedOutputsSpec extendedOutputsSpec)
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{
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return {
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state, cmd, v,
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prefix == "." ? "" : std::string { prefix },
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std::move(extendedOutputsSpec),
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};
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}
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}
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