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nix: Make -f work for compatibility

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This commit is contained in:
Eelco Dolstra 2019-04-08 16:11:17 +02:00
parent 9b7eac332b
commit 101d964a59
4 changed files with 61 additions and 91 deletions
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23
src/nix/command.hh
View file

@ -74,23 +74,20 @@ struct Installable
struct SourceExprCommand : virtual Args, StoreCommand, MixEvalArgs
{
std::optional<Path> file;
std::optional<std::string> flakeUri;
SourceExprCommand();
/* Return a value representing the Nix expression from which we
are installing. This is either the file specified by ‘--file’,
or an attribute set constructed from $NIX_PATH, e.g. ‘{ nixpkgs
= import ...; bla = import ...; }’. */
Value * getSourceExpr(EvalState & state);
ref<EvalState> getEvalState();
std::vector<std::shared_ptr<Installable>> parseInstallables(
ref<Store> store, std::vector<std::string> ss);
std::shared_ptr<Installable> parseInstallable(
ref<Store> store, const std::string & installable);
private:
std::shared_ptr<EvalState> evalState;
Value * vSourceExpr = 0;
};
enum RealiseMode { Build, NoBuild, DryRun };
@ -108,8 +105,6 @@ struct InstallablesCommand : virtual Args, SourceExprCommand
void prepare() override;
virtual bool useDefaultInstallables() { return true; }
private:
std::vector<std::string> _installables;
@ -148,8 +143,6 @@ public:
virtual void run(ref<Store> store, Paths storePaths) = 0;
void run(ref<Store> store) override;
bool useDefaultInstallables() override { return !all; }
};
/* A command that operates on exactly one store path. */
@ -174,10 +167,6 @@ struct RegisterCommand
}
};
std::shared_ptr<Installable> parseInstallable(
SourceExprCommand & cmd, ref<Store> store, const std::string & installable,
bool useDefaultInstallables);
Buildables build(ref<Store> store, RealiseMode mode,
std::vector<std::shared_ptr<Installable>> installables);

105
src/nix/installables.cc
View file

@ -19,33 +19,10 @@ SourceExprCommand::SourceExprCommand()
.shortName('f')
.longName("file")
.label("file")
.description("evaluate FILE rather than use the default installation source")
.description("evaluate a set of attributes from FILE (deprecated)")
.dest(&file);
}
Value * SourceExprCommand::getSourceExpr(EvalState & state)
{
if (vSourceExpr) return vSourceExpr;
vSourceExpr = state.allocValue();
if (file)
state.evalFile(lookupFileArg(state, *file), *vSourceExpr);
else {
// FIXME: remove "impure" hack, call some non-user-accessible
// variant of getFlake instead.
auto fun = state.parseExprFromString(
"builtins.mapAttrs (flakeName: flakeInfo:"
" (getFlake (\"impure:\" + flakeInfo.uri)).${flakeName}.provides.packages or {})", "/");
auto vFun = state.allocValue();
state.eval(fun, *vFun);
auto vRegistry = makeFlakeRegistryValue(state);
mkApp(*vSourceExpr, *vFun, *vRegistry);
}
return vSourceExpr;
}
ref<EvalState> SourceExprCommand::getEvalState()
{
if (!evalState)
@ -140,24 +117,20 @@ struct InstallableExpr : InstallableValue
struct InstallableAttrPath : InstallableValue
{
Value * v;
std::string attrPath;
InstallableAttrPath(SourceExprCommand & cmd, const std::string & attrPath)
: InstallableValue(cmd), attrPath(attrPath)
InstallableAttrPath(SourceExprCommand & cmd, Value * v, const std::string & attrPath)
: InstallableValue(cmd), v(v), attrPath(attrPath)
{ }
std::string what() override { return attrPath; }
Value * toValue(EvalState & state) override
{
auto source = cmd.getSourceExpr(state);
Bindings & autoArgs = *cmd.getAutoArgs(state);
Value * v = findAlongAttrPath(state, attrPath, autoArgs, *source);
state.forceValue(*v);
return v;
auto vRes = findAlongAttrPath(state, attrPath, *cmd.getAutoArgs(state), *v);
state.forceValue(*vRes);
return vRes;
}
};
@ -202,41 +175,47 @@ struct InstallableFlake : InstallableValue
std::string attrRegex = R"([A-Za-z_][A-Za-z0-9-_+]*)";
static std::regex attrPathRegex(fmt(R"(%1%(\.%1%)*)", attrRegex));
static std::vector<std::shared_ptr<Installable>> parseInstallables(
SourceExprCommand & cmd, ref<Store> store, std::vector<std::string> ss, bool useDefaultInstallables)
std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables(
ref<Store> store, std::vector<std::string> ss)
{
std::vector<std::shared_ptr<Installable>> result;
if (ss.empty() && useDefaultInstallables) {
if (cmd.file == "")
cmd.file = ".";
if (file) {
// FIXME: backward compatibility hack
evalSettings.pureEval = false;
auto state = getEvalState();
auto vFile = state->allocValue();
state->evalFile(lookupFileArg(*state, *file), *vFile);
if (ss.empty())
ss = {""};
}
for (auto & s : ss)
result.push_back(std::make_shared<InstallableAttrPath>(*this, vFile, s));
} else {
for (auto & s : ss) {
size_t colon;
if (s.compare(0, 1, "(") == 0)
result.push_back(std::make_shared<InstallableExpr>(cmd, s));
result.push_back(std::make_shared<InstallableExpr>(*this, s));
/*
else if (s.find('/') != std::string::npos) {
auto path = store->toStorePath(store->followLinksToStore(s));
if (store->isStorePath(path))
result.push_back(std::make_shared<InstallableStorePath>(path));
}
*/
else {
auto colon = s.rfind(':');
if (colon != std::string::npos) {
else if ((colon = s.rfind(':')) != std::string::npos) {
auto flakeRef = std::string(s, 0, colon);
auto attrPath = std::string(s, colon + 1);
result.push_back(std::make_shared<InstallableFlake>(cmd, FlakeRef(flakeRef), attrPath));
} else {
result.push_back(std::make_shared<InstallableFlake>(cmd, FlakeRef("nixpkgs"), s));
result.push_back(std::make_shared<InstallableFlake>(*this, FlakeRef(flakeRef), attrPath));
}
else if (s.find('/') != std::string::npos) {
auto path = store->toStorePath(store->followLinksToStore(s));
result.push_back(std::make_shared<InstallableStorePath>(path));
}
else {
result.push_back(std::make_shared<InstallableFlake>(*this, FlakeRef("nixpkgs"), s));
}
/*
@ -247,15 +226,15 @@ static std::vector<std::shared_ptr<Installable>> parseInstallables(
throw UsageError("don't know what to do with argument '%s'", s);
*/
}
}
return result;
}
std::shared_ptr<Installable> parseInstallable(
SourceExprCommand & cmd, ref<Store> store, const std::string & installable,
bool useDefaultInstallables)
std::shared_ptr<Installable> SourceExprCommand::parseInstallable(
ref<Store> store, const std::string & installable)
{
auto installables = parseInstallables(cmd, store, {installable}, false);
auto installables = parseInstallables(store, {installable});
assert(installables.size() == 1);
return installables.front();
}
@ -342,12 +321,12 @@ PathSet toDerivations(ref<Store> store,
void InstallablesCommand::prepare()
{
installables = parseInstallables(*this, getStore(), _installables, useDefaultInstallables());
installables = parseInstallables(getStore(), _installables);
}
void InstallableCommand::prepare()
{
installable = parseInstallable(*this, getStore(), _installable, false);
installable = parseInstallable(getStore(), _installable);
}
}

4
src/nix/search.cc
View file

@ -257,7 +257,9 @@ struct CmdSearch : SourceExprCommand, MixJSON
auto cache = writeCache ? std::make_unique<JSONObject>(jsonCacheFile, false) : nullptr;
doExpr(getSourceExpr(*state), "", true, cache.get());
// FIXME
throw Error("NOT IMPLEMENTED");
//doExpr(getSourceExpr(*state), "", true, cache.get());
} catch (std::exception &) {
/* Fun fact: catching std::ios::failure does not work

4
src/nix/why-depends.cc
View file

@ -74,9 +74,9 @@ struct CmdWhyDepends : SourceExprCommand
void run(ref<Store> store) override
{
auto package = parseInstallable(*this, store, _package, false);
auto package = parseInstallable(store, _package);
auto packagePath = toStorePath(store, Build, package);
auto dependency = parseInstallable(*this, store, _dependency, false);
auto dependency = parseInstallable(store, _dependency);
auto dependencyPath = toStorePath(store, NoBuild, dependency);
auto dependencyPathHash = storePathToHash(dependencyPath);