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#include "installables.hh"
#include "store-api.hh"
#include "eval-inline.hh"
#include "eval-cache.hh"
#include "names.hh"
#include "command.hh"
#include "derivations.hh"
namespace nix {
struct InstallableDerivedPath : Installable
{
ref<Store> store;
const DerivedPath derivedPath;
InstallableDerivedPath(ref<Store> store, const DerivedPath & derivedPath)
: store(store)
, derivedPath(derivedPath)
{
}
std::string what() const override { return derivedPath.to_string(*store); }
DerivedPaths toDerivedPaths() override
{
return {derivedPath};
}
std::optional<StorePath> getStorePath() override
{
return std::nullopt;
}
};
/**
* Return the rewrites that are needed to resolve a string whose context is
* included in `dependencies`.
*/
StringPairs resolveRewrites(Store & store, const BuiltPaths dependencies)
{
StringPairs res;
for (auto & dep : dependencies)
if (auto drvDep = std::get_if<BuiltPathBuilt>(&dep))
for (auto & [ outputName, outputPath ] : drvDep->outputs)
res.emplace(
downstreamPlaceholder(store, drvDep->drvPath, outputName),
store.printStorePath(outputPath)
);
return res;
}
/**
* Resolve the given string assuming the given context.
*/
std::string resolveString(Store & store, const std::string & toResolve, const BuiltPaths dependencies)
{
auto rewrites = resolveRewrites(store, dependencies);
return rewriteStrings(toResolve, rewrites);
}
UnresolvedApp Installable::toApp(EvalState & state)
{
auto cursor = getCursor(state);
auto attrPath = cursor->getAttrPath();
auto type = cursor->getAttr("type")->getString();
std::string expected = !attrPath.empty() &&
(state.symbols[attrPath[0]] == "apps" || state.symbols[attrPath[0]] == "defaultApp")
? "app" : "derivation";
if (type != expected)
throw Error("attribute '%s' should have type '%s'", cursor->getAttrPathStr(), expected);
if (type == "app") {
auto [program, context] = cursor->getAttr("program")->getStringWithContext();
std::vector<StorePathWithOutputs> context2;
for (auto & [path, name] : context)
context2.push_back({path, {name}});
return UnresolvedApp{App {
.context = std::move(context2),
.program = program,
}};
}
else if (type == "derivation") {
auto drvPath = cursor->forceDerivation();
auto outPath = cursor->getAttr(state.sOutPath)->getString();
auto outputName = cursor->getAttr(state.sOutputName)->getString();
auto name = cursor->getAttr(state.sName)->getString();
auto aPname = cursor->maybeGetAttr("pname");
auto aMeta = cursor->maybeGetAttr(state.sMeta);
auto aMainProgram = aMeta ? aMeta->maybeGetAttr("mainProgram") : nullptr;
auto mainProgram =
aMainProgram
? aMainProgram->getString()
: aPname
? aPname->getString()
: DrvName(name).name;
auto program = outPath + "/bin/" + mainProgram;
return UnresolvedApp { App {
.context = { { drvPath, {outputName} } },
.program = program,
}};
}
else
throw Error("attribute '%s' has unsupported type '%s'", cursor->getAttrPathStr(), type);
}
// FIXME: move to libcmd
App UnresolvedApp::resolve(ref<Store> evalStore, ref<Store> store)
{
auto res = unresolved;
std::vector<std::shared_ptr<Installable>> installableContext;
for (auto & ctxElt : unresolved.context)
installableContext.push_back(
std::make_shared<InstallableDerivedPath>(store, ctxElt.toDerivedPath()));
auto builtContext = Installable::build(evalStore, store, Realise::Outputs, installableContext);
res.program = resolveString(*store, unresolved.program, builtContext);
if (!store->isInStore(res.program))
throw Error("app program '%s' is not in the Nix store", res.program);
return res;
}
}
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