forked from lix-project/lix
109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
#include "value-to-json.hh"
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#include "eval-inline.hh"
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#include "util.hh"
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#include <cstdlib>
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#include <iomanip>
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#include <nlohmann/json.hpp>
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namespace nix {
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using json = nlohmann::json;
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json printValueAsJSON(EvalState & state, bool strict,
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Value & v, const PosIdx pos, PathSet & context, bool copyToStore)
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{
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checkInterrupt();
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if (strict) state.forceValue(v, pos);
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json out;
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switch (v.type()) {
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case nInt:
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out = v.integer;
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break;
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case nBool:
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out = v.boolean;
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break;
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case nString:
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copyContext(v, context);
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out = v.string.s;
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break;
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case nPath:
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if (copyToStore)
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out = state.copyPathToStore(context, v.path);
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else
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out = v.path;
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break;
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case nNull:
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break;
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case nAttrs: {
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auto maybeString = state.tryAttrsToString(pos, v, context, false, false);
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if (maybeString) {
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out = *maybeString;
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break;
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}
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auto i = v.attrs->find(state.sOutPath);
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if (i == v.attrs->end()) {
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out = json::object();
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StringSet names;
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for (auto & j : *v.attrs)
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names.emplace(state.symbols[j.name]);
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for (auto & j : names) {
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Attr & a(*v.attrs->find(state.symbols.create(j)));
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out[j] = printValueAsJSON(state, strict, *a.value, a.pos, context, copyToStore);
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}
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} else
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return printValueAsJSON(state, strict, *i->value, i->pos, context, copyToStore);
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break;
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}
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case nList: {
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out = json::array();
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for (auto elem : v.listItems())
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out.push_back(printValueAsJSON(state, strict, *elem, pos, context, copyToStore));
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break;
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}
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case nExternal:
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return v.external->printValueAsJSON(state, strict, context, copyToStore);
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break;
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case nFloat:
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out = v.fpoint;
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break;
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case nThunk:
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case nFunction:
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auto e = TypeError({
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.msg = hintfmt("cannot convert %1% to JSON", showType(v)),
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.errPos = state.positions[v.determinePos(pos)]
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});
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e.addTrace(state.positions[pos], hintfmt("message for the trace"));
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state.debugThrowLastTrace(e);
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throw e;
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}
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return out;
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}
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void printValueAsJSON(EvalState & state, bool strict,
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Value & v, const PosIdx pos, std::ostream & str, PathSet & context, bool copyToStore)
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{
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str << printValueAsJSON(state, strict, v, pos, context, copyToStore);
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}
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json ExternalValueBase::printValueAsJSON(EvalState & state, bool strict,
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PathSet & context, bool copyToStore) const
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{
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state.debugThrowLastTrace(TypeError("cannot convert %1% to JSON", showType()));
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}
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}
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