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95d9c13716
* It is tough to contribute to a project that doesn't use a formatter, * It is extra hard to contribute to a project which has configured the formatter, but ignores it for some files * Code formatting makes it harder to hide obscure / weird bugs by accident or on purpose, Let's rip the bandaid off? Note that PRs currently in flight should be able to be merged relatively easily by applying `clang-format` to their tip prior to merge. Co-authored-by: Graham Christensen <graham@grahamc.com>
127 lines
3.3 KiB
C++
127 lines
3.3 KiB
C++
#include "nix/expr/value-to-json.hh"
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#include "nix/expr/eval-inline.hh"
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#include "nix/store/store-api.hh"
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#include "nix/util/signals.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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// TODO: rename. It doesn't print.
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json printValueAsJSON(
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EvalState & state, bool strict, Value & v, const PosIdx pos, NixStringContext & context, bool copyToStore)
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{
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checkInterrupt();
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if (strict)
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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().value;
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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.c_str();
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break;
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case nPath:
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if (copyToStore)
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out = state.store->printStorePath(state.copyPathToStore(context, v.path()));
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else
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out = v.path().path.abs();
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break;
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case nNull:
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// already initialized as null
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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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if (auto i = v.attrs()->get(state.sOutPath))
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return printValueAsJSON(state, strict, *i->value, i->pos, context, copyToStore);
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else {
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out = json::object();
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for (auto & a : v.attrs()->lexicographicOrder(state.symbols)) {
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try {
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out.emplace(
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state.symbols[a->name],
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printValueAsJSON(state, strict, *a->value, a->pos, context, copyToStore));
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} catch (Error & e) {
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e.addTrace(
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state.positions[a->pos], HintFmt("while evaluating attribute '%1%'", state.symbols[a->name]));
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throw;
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}
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}
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}
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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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int i = 0;
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for (auto elem : v.listView()) {
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try {
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out.push_back(printValueAsJSON(state, strict, *elem, pos, context, copyToStore));
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} catch (Error & e) {
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e.addTrace(state.positions[pos], HintFmt("while evaluating list element at index %1%", i));
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throw;
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}
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i++;
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}
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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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state.error<TypeError>("cannot convert %1% to JSON", showType(v)).atPos(v.determinePos(pos)).debugThrow();
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}
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return out;
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}
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void printValueAsJSON(
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EvalState & state,
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bool strict,
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Value & v,
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const PosIdx pos,
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std::ostream & str,
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NixStringContext & context,
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bool copyToStore)
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{
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try {
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str << printValueAsJSON(state, strict, v, pos, context, copyToStore);
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} catch (nlohmann::json::exception & e) {
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throw JSONSerializationError("JSON serialization error: %s", e.what());
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}
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}
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json ExternalValueBase::printValueAsJSON(
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EvalState & state, bool strict, NixStringContext & context, bool copyToStore) const
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{
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state.error<TypeError>("cannot convert %1% to JSON", showType()).debugThrow();
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}
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} // namespace nix
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