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ecd3e4ebd7
Also put proper comparison methods on `DerivedPath` and `NixStringContextElem`, which is needed for the tests but good in general.
97 lines
2.2 KiB
C++
97 lines
2.2 KiB
C++
#pragma once
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#include "util.hh"
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#include "comparator.hh"
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#include "path.hh"
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#include <variant>
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#include <nlohmann/json_fwd.hpp>
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namespace nix {
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class BadNixStringContextElem : public Error
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{
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public:
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std::string_view raw;
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template<typename... Args>
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BadNixStringContextElem(std::string_view raw_, const Args & ... args)
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: Error("")
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{
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raw = raw_;
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auto hf = hintfmt(args...);
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err.msg = hintfmt("Bad String Context element: %1%: %2%", normaltxt(hf.str()), raw);
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}
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};
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class Store;
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/* Plain opaque path to some store object.
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Encoded as just the path: ‘<path>’.
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*/
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struct NixStringContextElem_Opaque {
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StorePath path;
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GENERATE_CMP(NixStringContextElem_Opaque, me->path);
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};
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/* Path to a derivation and its entire build closure.
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The path doesn't just refer to derivation itself and its closure, but
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also all outputs of all derivations in that closure (including the
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root derivation).
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Encoded in the form ‘=<drvPath>’.
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*/
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struct NixStringContextElem_DrvDeep {
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StorePath drvPath;
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GENERATE_CMP(NixStringContextElem_DrvDeep, me->drvPath);
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};
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/* Derivation output.
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Encoded in the form ‘!<output>!<drvPath>’.
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*/
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struct NixStringContextElem_Built {
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StorePath drvPath;
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std::string output;
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GENERATE_CMP(NixStringContextElem_Built, me->drvPath, me->output);
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};
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using _NixStringContextElem_Raw = std::variant<
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NixStringContextElem_Opaque,
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NixStringContextElem_DrvDeep,
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NixStringContextElem_Built
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>;
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struct NixStringContextElem : _NixStringContextElem_Raw {
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using Raw = _NixStringContextElem_Raw;
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using Raw::Raw;
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using Opaque = NixStringContextElem_Opaque;
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using DrvDeep = NixStringContextElem_DrvDeep;
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using Built = NixStringContextElem_Built;
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inline const Raw & raw() const {
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return static_cast<const Raw &>(*this);
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}
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inline Raw & raw() {
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return static_cast<Raw &>(*this);
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}
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/* Decode a context string, one of:
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- ‘<path>’
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- ‘=<path>’
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- ‘!<name>!<path>’
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*/
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static NixStringContextElem parse(const Store & store, std::string_view s);
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std::string to_string(const Store & store) const;
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};
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typedef std::vector<NixStringContextElem> NixStringContext;
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}
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