forked from lix-project/lix
d89840b103
In particular, this means that 'nix eval` (which uses toValue()) no longer auto-calls functions or functors (because AttrCursor::findAlongAttrPath() doesn't). Fixes #6152. Also use ref<> in a few places, and don't return attrpaths from getCursor() because cursors already have a getAttrPath() method.
127 lines
3.6 KiB
C++
127 lines
3.6 KiB
C++
#include "installables.hh"
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#include "store-api.hh"
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#include "eval-inline.hh"
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#include "eval-cache.hh"
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#include "names.hh"
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#include "command.hh"
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#include "derivations.hh"
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namespace nix {
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struct InstallableDerivedPath : Installable
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{
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ref<Store> store;
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const DerivedPath derivedPath;
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InstallableDerivedPath(ref<Store> store, const DerivedPath & derivedPath)
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: store(store)
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, derivedPath(derivedPath)
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{
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}
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std::string what() const override { return derivedPath.to_string(*store); }
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DerivedPaths toDerivedPaths() override
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{
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return {derivedPath};
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}
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std::optional<StorePath> getStorePath() override
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{
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return std::nullopt;
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}
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};
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/**
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* Return the rewrites that are needed to resolve a string whose context is
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* included in `dependencies`
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*/
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StringPairs resolveRewrites(Store & store, const BuiltPaths dependencies)
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{
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StringPairs res;
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for (auto & dep : dependencies)
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if (auto drvDep = std::get_if<BuiltPathBuilt>(&dep))
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for (auto & [ outputName, outputPath ] : drvDep->outputs)
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res.emplace(
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downstreamPlaceholder(store, drvDep->drvPath, outputName),
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store.printStorePath(outputPath)
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);
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return res;
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}
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/**
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* Resolve the given string assuming the given context
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*/
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std::string resolveString(Store & store, const std::string & toResolve, const BuiltPaths dependencies)
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{
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auto rewrites = resolveRewrites(store, dependencies);
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return rewriteStrings(toResolve, rewrites);
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}
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UnresolvedApp Installable::toApp(EvalState & state)
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{
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auto cursor = getCursor(state);
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auto type = cursor->getAttr("type")->getString();
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if (type == "app") {
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auto [program, context] = cursor->getAttr("program")->getStringWithContext();
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std::vector<StorePathWithOutputs> context2;
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for (auto & [path, name] : context)
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context2.push_back({path, {name}});
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return UnresolvedApp{App {
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.context = std::move(context2),
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.program = program,
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}};
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}
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else if (type == "derivation") {
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auto drvPath = cursor->forceDerivation();
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auto outPath = cursor->getAttr(state.sOutPath)->getString();
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auto outputName = cursor->getAttr(state.sOutputName)->getString();
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auto name = cursor->getAttr(state.sName)->getString();
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auto aPname = cursor->maybeGetAttr("pname");
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auto aMeta = cursor->maybeGetAttr("meta");
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auto aMainProgram = aMeta ? aMeta->maybeGetAttr("mainProgram") : nullptr;
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auto mainProgram =
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aMainProgram
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? aMainProgram->getString()
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: aPname
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? aPname->getString()
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: DrvName(name).name;
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auto program = outPath + "/bin/" + mainProgram;
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return UnresolvedApp { App {
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.context = { { drvPath, {outputName} } },
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.program = program,
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}};
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}
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else
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throw Error("attribute '%s' has unsupported type '%s'", cursor->getAttrPathStr(), type);
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}
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// FIXME: move to libcmd
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App UnresolvedApp::resolve(ref<Store> evalStore, ref<Store> store)
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{
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auto res = unresolved;
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std::vector<std::shared_ptr<Installable>> installableContext;
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for (auto & ctxElt : unresolved.context)
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installableContext.push_back(
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std::make_shared<InstallableDerivedPath>(store, ctxElt.toDerivedPath()));
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auto builtContext = Installable::build(evalStore, store, Realise::Outputs, installableContext);
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res.program = resolveString(*store, unresolved.program, builtContext);
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if (!store->isInStore(res.program))
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throw Error("app program '%s' is not in the Nix store", res.program);
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return res;
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}
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}
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