mirror of
https://github.com/NixOS/nix
synced 2025-06-25 06:31:14 +02:00
15658b259f
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.
(cherry picked from commit f3e1c47f47)
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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