c0a7b84748
Also, factor out JSON generation from value-to-json.{cc,hh}, and
support producing indented JSON.
95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
#include "value-to-json.hh"
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#include "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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namespace nix {
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void printValueAsJSON(EvalState & state, bool strict,
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Value & v, JSONPlaceholder & out, PathSet & context)
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{
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checkInterrupt();
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if (strict) state.forceValue(v);
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switch (v.type) {
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case tInt:
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out.write(v.integer);
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break;
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case tBool:
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out.write(v.boolean);
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break;
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case tString:
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copyContext(v, context);
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out.write(v.string.s);
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break;
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case tPath:
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out.write(state.copyPathToStore(context, v.path));
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break;
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case tNull:
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out.write(nullptr);
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break;
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case tAttrs: {
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Bindings::iterator i = v.attrs->find(state.sOutPath);
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if (i == v.attrs->end()) {
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auto obj(out.object());
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StringSet names;
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for (auto & j : *v.attrs)
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names.insert(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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auto placeholder(obj.placeholder(j));
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printValueAsJSON(state, strict, *a.value, placeholder, context);
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}
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} else
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printValueAsJSON(state, strict, *i->value, out, context);
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break;
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}
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case tList1: case tList2: case tListN: {
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auto list(out.list());
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for (unsigned int n = 0; n < v.listSize(); ++n) {
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auto placeholder(list.placeholder());
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printValueAsJSON(state, strict, *v.listElems()[n], placeholder, context);
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}
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break;
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}
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case tExternal:
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v.external->printValueAsJSON(state, strict, out, context);
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break;
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case tFloat:
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out.write(v.fpoint);
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break;
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default:
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throw TypeError(format("cannot convert %1% to JSON") % showType(v));
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}
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}
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void printValueAsJSON(EvalState & state, bool strict,
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Value & v, std::ostream & str, PathSet & context)
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{
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JSONPlaceholder out(str);
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printValueAsJSON(state, strict, v, out, context);
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}
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void ExternalValueBase::printValueAsJSON(EvalState & state, bool strict,
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JSONPlaceholder & out, PathSet & context) const
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{
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throw TypeError(format("cannot convert %1% to JSON") % showType());
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}
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}
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