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#include "eval.hh"
#include "eval-settings.hh"
#include "globals.hh"
#include "command.hh"
#include "installable-value.hh"
#include "repl.hh"
namespace nix {
struct CmdRepl : RawInstallablesCommand
{
CmdRepl() {
evalSettings.pureEval.override(false);
}
/**
* This command is stable before the others
*/
std::optional<ExperimentalFeature> experimentalFeature() override
{
return std::nullopt;
}
std::vector<std::string> files;
Strings getDefaultFlakeAttrPaths() override
{
return {""};
}
bool forceImpureByDefault() override
{
return true;
}
std::string description() override
{
return "start an interactive environment for evaluating Nix expressions";
}
std::string doc() override
{
return
#include "repl.md"
;
}
void applyDefaultInstallables(std::vector<std::string> & rawInstallables) override
{
if (!experimentalFeatureSettings.isEnabled(Xp::ReplFlake) && !(file) && rawInstallables.size() >= 1) {
warn("future versions of Lix will require using `--file` to load a file");
if (rawInstallables.size() > 1)
warn("more than one input file is not currently supported");
auto filePath = rawInstallables[0].data();
file = std::optional(filePath);
rawInstallables.front() = rawInstallables.back();
rawInstallables.pop_back();
}
if (rawInstallables.empty() && (file.has_value() || expr.has_value())) {
rawInstallables.push_back(".");
}
}
void run(ref<Store> store, std::vector<std::string> && rawInstallables) override
{
auto state = getEvalState();
auto getValues = [&]()->AbstractNixRepl::AnnotatedValues{
auto installables = parseInstallables(store, rawInstallables);
AbstractNixRepl::AnnotatedValues values;
for (auto & installable_: installables){
auto & installable = InstallableValue::require(*installable_);
auto what = installable.what();
if (file){
auto [val, pos] = installable.toValue(*state);
auto what = installable.what();
state->forceValue(*val, pos);
auto autoArgs = getAutoArgs(*state);
auto valPost = state->allocValue();
state->autoCallFunction(*autoArgs, *val, *valPost);
state->forceValue(*valPost, pos);
values.push_back( {valPost, what });
} else {
auto [val, pos] = installable.toValue(*state);
values.push_back( {val, what} );
}
}
return values;
};
auto repl = AbstractNixRepl::create(
searchPath,
openStore(),
state,
getValues
);
repl->autoArgs = getAutoArgs(*repl->state);
repl->initEnv();
repl->mainLoop();
}
};
static auto rCmdRepl = registerCommand<CmdRepl>("repl");
}
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