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#include "util.hh"
#include "outputs-spec.hh"
#include "nlohmann/json.hpp"
#include <regex>
namespace nix {
bool OutputsSpec::contains(const std::string & outputName) const
{
return std::visit(overloaded {
[&](const OutputsSpec::All &) {
return true;
},
[&](const OutputsSpec::Names & outputNames) {
return outputNames.count(outputName) > 0;
},
}, raw());
}
std::optional<OutputsSpec> OutputsSpec::parseOpt(std::string_view s)
{
static std::regex regex(R"((\*)|([a-z]+(,[a-z]+)*))");
std::smatch match;
std::string s2 { s }; // until some improves std::regex
if (!std::regex_match(s2, match, regex))
return std::nullopt;
if (match[1].matched)
return { OutputsSpec::All {} };
if (match[2].matched)
return OutputsSpec::Names { tokenizeString<StringSet>(match[2].str(), ",") };
assert(false);
}
OutputsSpec OutputsSpec::parse(std::string_view s)
{
std::optional spec = OutputsSpec::parseOpt(s);
if (!spec)
throw Error("Invalid outputs specifier: '%s'", s);
return *spec;
}
std::pair<std::string_view, ExtendedOutputsSpec> ExtendedOutputsSpec::parse(std::string_view s)
{
auto found = s.rfind('^');
if (found == std::string::npos)
return { s, ExtendedOutputsSpec::Default {} };
auto spec = OutputsSpec::parse(s.substr(found + 1));
return { s.substr(0, found), ExtendedOutputsSpec::Explicit { spec } };
}
std::string OutputsSpec::to_string() const
{
return std::visit(overloaded {
[&](const OutputsSpec::All &) -> std::string {
return "*";
},
[&](const OutputsSpec::Names & outputNames) -> std::string {
return concatStringsSep(",", outputNames);
},
}, raw());
}
std::string ExtendedOutputsSpec::to_string() const
{
return std::visit(overloaded {
[&](const ExtendedOutputsSpec::Default &) -> std::string {
return "";
},
[&](const ExtendedOutputsSpec::Explicit & outputSpec) -> std::string {
return "^" + outputSpec.to_string();
},
}, raw());
}
bool OutputsSpec::merge(const OutputsSpec & that)
{
return std::visit(overloaded {
[&](OutputsSpec::All &) {
/* If we already refer to all outputs, there is nothing to do. */
return false;
},
[&](OutputsSpec::Names & theseNames) {
return std::visit(overloaded {
[&](const OutputsSpec::All &) {
*this = OutputsSpec::All {};
return true;
},
[&](const OutputsSpec::Names & thoseNames) {
bool ret = false;
for (auto & i : thoseNames)
if (theseNames.insert(i).second)
ret = true;
return ret;
},
}, that.raw());
},
}, raw());
}
void to_json(nlohmann::json & json, const OutputsSpec & outputsSpec)
{
std::visit(overloaded {
[&](const OutputsSpec::All &) {
json = std::vector<std::string>({"*"});
},
[&](const OutputsSpec::Names & names) {
json = names;
},
}, outputsSpec);
}
void to_json(nlohmann::json & json, const ExtendedOutputsSpec & extendedOutputsSpec)
{
std::visit(overloaded {
[&](const ExtendedOutputsSpec::Default &) {
json = nullptr;
},
[&](const ExtendedOutputsSpec::Explicit & e) {
to_json(json, e);
},
}, extendedOutputsSpec);
}
void from_json(const nlohmann::json & json, OutputsSpec & outputsSpec)
{
auto names = json.get<StringSet>();
if (names == StringSet({"*"}))
outputsSpec = OutputsSpec::All {};
else
outputsSpec = OutputsSpec::Names { std::move(names) };
}
void from_json(const nlohmann::json & json, ExtendedOutputsSpec & extendedOutputsSpec)
{
if (json.is_null())
extendedOutputsSpec = ExtendedOutputsSpec::Default {};
else {
extendedOutputsSpec = ExtendedOutputsSpec::Explicit { json.get<OutputsSpec>() };
}
}
}
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