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b36857ac8d
GitArchiveInputScheme now streams tarballs into a Git repository. This deduplicates data a lot, e.g. when you're fetching different revisions of the Nixpkgs repo. It also warns if the tree hash returned by GitHub doesn't match the tree hash of the imported tarball.
112 lines
3.3 KiB
C++
112 lines
3.3 KiB
C++
#include "attrs.hh"
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#include "fetchers.hh"
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#include <nlohmann/json.hpp>
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namespace nix::fetchers {
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Attrs jsonToAttrs(const nlohmann::json & json)
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{
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Attrs attrs;
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for (auto & i : json.items()) {
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if (i.value().is_number())
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attrs.emplace(i.key(), i.value().get<uint64_t>());
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else if (i.value().is_string())
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attrs.emplace(i.key(), i.value().get<std::string>());
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else if (i.value().is_boolean())
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attrs.emplace(i.key(), Explicit<bool> { i.value().get<bool>() });
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else
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throw Error("unsupported input attribute type in lock file");
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}
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return attrs;
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}
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nlohmann::json attrsToJSON(const Attrs & attrs)
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{
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nlohmann::json json;
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for (auto & attr : attrs) {
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if (auto v = std::get_if<uint64_t>(&attr.second)) {
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json[attr.first] = *v;
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} else if (auto v = std::get_if<std::string>(&attr.second)) {
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json[attr.first] = *v;
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} else if (auto v = std::get_if<Explicit<bool>>(&attr.second)) {
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json[attr.first] = v->t;
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} else abort();
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}
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return json;
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}
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std::optional<std::string> maybeGetStrAttr(const Attrs & attrs, const std::string & name)
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{
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auto i = attrs.find(name);
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if (i == attrs.end()) return {};
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if (auto v = std::get_if<std::string>(&i->second))
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return *v;
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throw Error("input attribute '%s' is not a string %s", name, attrsToJSON(attrs).dump());
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}
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std::string getStrAttr(const Attrs & attrs, const std::string & name)
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{
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auto s = maybeGetStrAttr(attrs, name);
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if (!s)
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throw Error("input attribute '%s' is missing", name);
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return *s;
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}
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std::optional<uint64_t> maybeGetIntAttr(const Attrs & attrs, const std::string & name)
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{
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auto i = attrs.find(name);
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if (i == attrs.end()) return {};
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if (auto v = std::get_if<uint64_t>(&i->second))
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return *v;
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throw Error("input attribute '%s' is not an integer", name);
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}
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uint64_t getIntAttr(const Attrs & attrs, const std::string & name)
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{
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auto s = maybeGetIntAttr(attrs, name);
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if (!s)
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throw Error("input attribute '%s' is missing", name);
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return *s;
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}
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std::optional<bool> maybeGetBoolAttr(const Attrs & attrs, const std::string & name)
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{
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auto i = attrs.find(name);
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if (i == attrs.end()) return {};
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if (auto v = std::get_if<Explicit<bool>>(&i->second))
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return v->t;
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throw Error("input attribute '%s' is not a Boolean", name);
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}
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bool getBoolAttr(const Attrs & attrs, const std::string & name)
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{
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auto s = maybeGetBoolAttr(attrs, name);
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if (!s)
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throw Error("input attribute '%s' is missing", name);
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return *s;
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}
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std::map<std::string, std::string> attrsToQuery(const Attrs & attrs)
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{
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std::map<std::string, std::string> query;
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for (auto & attr : attrs) {
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if (auto v = std::get_if<uint64_t>(&attr.second)) {
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query.insert_or_assign(attr.first, fmt("%d", *v));
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} else if (auto v = std::get_if<std::string>(&attr.second)) {
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query.insert_or_assign(attr.first, *v);
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} else if (auto v = std::get_if<Explicit<bool>>(&attr.second)) {
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query.insert_or_assign(attr.first, v->t ? "1" : "0");
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} else abort();
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}
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return query;
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}
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Hash getRevAttr(const Attrs & attrs, const std::string & name)
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{
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return Hash::parseAny(getStrAttr(attrs, name), htSHA1);
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}
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}
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