forked from lix-project/lix
Move LockFile and related types to a separate file
This commit is contained in:
Eelco Dolstra
parent
278114d559
commit
9e99b5205c
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@ -1,4 +1,5 @@
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#include "flake.hh"
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#include "lockfile.hh"
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#include "primops.hh"
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#include "eval-inline.hh"
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#include "fetchGit.hh"
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@ -50,104 +51,6 @@ void writeRegistry(const FlakeRegistry & registry, const Path & path)
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writeFile(path, json.dump(4)); // The '4' is the number of spaces used in the indentation in the json file.
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}
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AbstractDep::AbstractDep(const nlohmann::json & json)
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: ref(json["uri"])
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, narHash(Hash((std::string) json["narHash"]))
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{
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if (!ref.isImmutable())
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throw Error("lockfile contains mutable flakeref '%s'", ref);
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}
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nlohmann::json AbstractDep::toJson() const
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{
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nlohmann::json json;
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json["uri"] = ref.to_string();
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json["narHash"] = narHash.to_string(SRI);
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return json;
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}
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Path AbstractDep::computeStorePath(Store & store) const
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{
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return store.makeFixedOutputPath(true, narHash, "source");
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}
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FlakeDep::FlakeDep(const nlohmann::json & json)
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: FlakeInputs(json)
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, AbstractDep(json)
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, id(json["id"])
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{
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}
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nlohmann::json FlakeDep::toJson() const
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{
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auto json = FlakeInputs::toJson();
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json.update(AbstractDep::toJson());
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json["id"] = id;
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return json;
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}
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FlakeInputs::FlakeInputs(const nlohmann::json & json)
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{
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auto nonFlakeInputs = json["nonFlakeInputs"];
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for (auto i = nonFlakeInputs.begin(); i != nonFlakeInputs.end(); ++i)
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nonFlakeDeps.insert_or_assign(i.key(), NonFlakeDep(*i));
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auto inputs = json["inputs"];
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for (auto i = inputs.begin(); i != inputs.end(); ++i)
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flakeDeps.insert_or_assign(i.key(), FlakeDep(*i));
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}
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nlohmann::json FlakeInputs::toJson() const
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{
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nlohmann::json json;
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{
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auto j = nlohmann::json::object();
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for (auto & i : nonFlakeDeps)
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j[i.first] = i.second.toJson();
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json["nonFlakeInputs"] = std::move(j);
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}
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{
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auto j = nlohmann::json::object();
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for (auto & i : flakeDeps)
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j[i.first.to_string()] = i.second.toJson();
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json["inputs"] = std::move(j);
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}
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return json;
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}
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nlohmann::json LockFile::toJson() const
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{
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auto json = FlakeInputs::toJson();
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json["version"] = 2;
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return json;
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}
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LockFile readLockFile(const Path & path)
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{
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if (pathExists(path)) {
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auto json = nlohmann::json::parse(readFile(path));
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auto version = json.value("version", 0);
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if (version != 2)
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throw Error("lock file '%s' has unsupported version %d", path, version);
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return LockFile(json);
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} else
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return LockFile();
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}
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std::ostream & operator <<(std::ostream & stream, const LockFile & lockFile)
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{
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stream << lockFile.toJson().dump(4); // '4' = indentation in json file
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return stream;
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}
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void writeLockFile(const LockFile & lockFile, const Path & path)
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{
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createDirs(dirOf(path));
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writeFile(path, fmt("%s\n", lockFile));
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}
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Path getUserRegistryPath()
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{
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return getHome() + "/.config/nix/registry.json";
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@ -471,7 +374,7 @@ ResolvedFlake resolveFlake(EvalState & state, const FlakeRef & topRef, HandleLoc
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if (!recreateLockFile(handleLockFile)) {
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// If recreateLockFile, start with an empty lockfile
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// FIXME: symlink attack
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oldLockFile = readLockFile(
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oldLockFile = LockFile::read(
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state.store->toRealPath(flake.sourceInfo.storePath)
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+ "/" + flake.sourceInfo.resolvedRef.subdir + "/flake.lock");
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}
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@ -483,7 +386,7 @@ ResolvedFlake resolveFlake(EvalState & state, const FlakeRef & topRef, HandleLoc
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if (!(lockFile == oldLockFile)) {
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if (allowedToWrite(handleLockFile)) {
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if (auto refData = std::get_if<FlakeRef::IsPath>(&topRef.data)) {
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writeLockFile(lockFile, refData->path + (topRef.subdir == "" ? "" : "/" + topRef.subdir) + "/flake.lock");
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lockFile.write(refData->path + (topRef.subdir == "" ? "" : "/" + topRef.subdir) + "/flake.lock");
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// Hack: Make sure that flake.lock is visible to Git, so it ends up in the Nix store.
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runProgram("git", true, { "-C", refData->path, "add",
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@ -2,15 +2,12 @@
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#include "types.hh"
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#include "flakeref.hh"
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#include <variant>
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#include <nlohmann/json.hpp>
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#include "lockfile.hh"
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namespace nix {
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struct Value;
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class EvalState;
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class Store;
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namespace flake {
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@ -40,86 +37,6 @@ enum HandleLockFile : unsigned int
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, UseNewLockFile // `RecreateLockFile` without writing to file
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};
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struct AbstractDep
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{
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FlakeRef ref;
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Hash narHash;
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AbstractDep(const FlakeRef & flakeRef, const Hash & narHash)
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: ref(flakeRef), narHash(narHash) {};
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AbstractDep(const nlohmann::json & json);
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nlohmann::json toJson() const;
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Path computeStorePath(Store & store) const;
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};
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struct NonFlakeDep : AbstractDep
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{
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using AbstractDep::AbstractDep;
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bool operator ==(const NonFlakeDep & other) const
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{
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return ref == other.ref && narHash == other.narHash;
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}
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};
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struct FlakeDep;
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struct FlakeInputs
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{
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std::map<FlakeRef, FlakeDep> flakeDeps;
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std::map<FlakeAlias, NonFlakeDep> nonFlakeDeps;
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FlakeInputs() {};
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FlakeInputs(const nlohmann::json & json);
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nlohmann::json toJson() const;
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};
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struct FlakeDep : FlakeInputs, AbstractDep
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{
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FlakeId id;
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FlakeDep(const FlakeId & id, const FlakeRef & flakeRef, const Hash & narHash)
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: AbstractDep(flakeRef, narHash), id(id) {};
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FlakeDep(const nlohmann::json & json);
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bool operator ==(const FlakeDep & other) const
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{
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return
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id == other.id
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&& ref == other.ref
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&& narHash == other.narHash
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&& flakeDeps == other.flakeDeps
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&& nonFlakeDeps == other.nonFlakeDeps;
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}
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nlohmann::json toJson() const;
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};
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struct LockFile : FlakeInputs
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{
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bool operator ==(const LockFile & other) const
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{
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return
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flakeDeps == other.flakeDeps
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&& nonFlakeDeps == other.nonFlakeDeps;
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}
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LockFile() {}
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LockFile(const nlohmann::json & json) : FlakeInputs(json) {}
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LockFile(FlakeDep && dep)
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{
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flakeDeps = std::move(dep.flakeDeps);
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nonFlakeDeps = std::move(dep.nonFlakeDeps);
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}
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nlohmann::json toJson() const;
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};
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struct SourceInfo
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{
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// Immutable flakeref that this source tree was obtained from.
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104
src/libexpr/primops/lockfile.cc
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104
src/libexpr/primops/lockfile.cc
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@ -0,0 +1,104 @@
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#include "lockfile.hh"
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#include "store-api.hh"
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namespace nix::flake {
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AbstractDep::AbstractDep(const nlohmann::json & json)
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: ref(json["uri"])
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, narHash(Hash((std::string) json["narHash"]))
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{
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if (!ref.isImmutable())
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throw Error("lockfile contains mutable flakeref '%s'", ref);
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}
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nlohmann::json AbstractDep::toJson() const
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{
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nlohmann::json json;
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json["uri"] = ref.to_string();
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json["narHash"] = narHash.to_string(SRI);
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return json;
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}
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Path AbstractDep::computeStorePath(Store & store) const
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{
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return store.makeFixedOutputPath(true, narHash, "source");
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}
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FlakeDep::FlakeDep(const nlohmann::json & json)
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: FlakeInputs(json)
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, AbstractDep(json)
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, id(json["id"])
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{
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}
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nlohmann::json FlakeDep::toJson() const
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{
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auto json = FlakeInputs::toJson();
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json.update(AbstractDep::toJson());
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json["id"] = id;
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return json;
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}
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FlakeInputs::FlakeInputs(const nlohmann::json & json)
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{
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auto nonFlakeInputs = json["nonFlakeInputs"];
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for (auto i = nonFlakeInputs.begin(); i != nonFlakeInputs.end(); ++i)
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nonFlakeDeps.insert_or_assign(i.key(), NonFlakeDep(*i));
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auto inputs = json["inputs"];
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for (auto i = inputs.begin(); i != inputs.end(); ++i)
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flakeDeps.insert_or_assign(i.key(), FlakeDep(*i));
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}
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nlohmann::json FlakeInputs::toJson() const
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{
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nlohmann::json json;
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{
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auto j = nlohmann::json::object();
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for (auto & i : nonFlakeDeps)
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j[i.first] = i.second.toJson();
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json["nonFlakeInputs"] = std::move(j);
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}
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{
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auto j = nlohmann::json::object();
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for (auto & i : flakeDeps)
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j[i.first.to_string()] = i.second.toJson();
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json["inputs"] = std::move(j);
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}
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return json;
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}
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nlohmann::json LockFile::toJson() const
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{
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auto json = FlakeInputs::toJson();
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json["version"] = 2;
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return json;
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}
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LockFile LockFile::read(const Path & path)
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{
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if (pathExists(path)) {
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auto json = nlohmann::json::parse(readFile(path));
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auto version = json.value("version", 0);
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if (version != 2)
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throw Error("lock file '%s' has unsupported version %d", path, version);
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return LockFile(json);
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} else
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return LockFile();
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}
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std::ostream & operator <<(std::ostream & stream, const LockFile & lockFile)
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{
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stream << lockFile.toJson().dump(4); // '4' = indentation in json file
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return stream;
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}
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void LockFile::write(const Path & path) const
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{
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createDirs(dirOf(path));
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writeFile(path, fmt("%s\n", *this));
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}
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}
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110
src/libexpr/primops/lockfile.hh
Normal file
110
src/libexpr/primops/lockfile.hh
Normal file
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@ -0,0 +1,110 @@
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#pragma once
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#include "flakeref.hh"
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#include <nlohmann/json.hpp>
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namespace nix {
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class Store;
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}
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namespace nix::flake {
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/* Common lock file information about a flake input, namely the
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immutable ref and the NAR hash. */
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struct AbstractDep
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{
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FlakeRef ref;
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Hash narHash;
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AbstractDep(const FlakeRef & flakeRef, const Hash & narHash)
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: ref(flakeRef), narHash(narHash)
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{
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assert(ref.isImmutable());
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};
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AbstractDep(const nlohmann::json & json);
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nlohmann::json toJson() const;
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Path computeStorePath(Store & store) const;
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};
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/* Lock file information about a non-flake input. */
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struct NonFlakeDep : AbstractDep
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{
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using AbstractDep::AbstractDep;
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bool operator ==(const NonFlakeDep & other) const
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{
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return ref == other.ref && narHash == other.narHash;
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}
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};
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struct FlakeDep;
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/* Lock file information about the dependencies of a flake. */
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struct FlakeInputs
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{
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std::map<FlakeRef, FlakeDep> flakeDeps;
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std::map<FlakeAlias, NonFlakeDep> nonFlakeDeps;
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FlakeInputs() {};
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FlakeInputs(const nlohmann::json & json);
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nlohmann::json toJson() const;
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};
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/* Lock file information about a flake input. */
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struct FlakeDep : FlakeInputs, AbstractDep
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{
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FlakeId id;
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FlakeDep(const FlakeId & id, const FlakeRef & flakeRef, const Hash & narHash)
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: AbstractDep(flakeRef, narHash), id(id) {};
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FlakeDep(const nlohmann::json & json);
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bool operator ==(const FlakeDep & other) const
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{
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return
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id == other.id
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&& ref == other.ref
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&& narHash == other.narHash
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&& flakeDeps == other.flakeDeps
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&& nonFlakeDeps == other.nonFlakeDeps;
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}
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nlohmann::json toJson() const;
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};
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/* An entire lock file. Note that this cannot be a FlakeDep for the
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top-level flake, because then the lock file would need to contain
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the hash of the top-level flake, but committing the lock file
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would invalidate that hash. */
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struct LockFile : FlakeInputs
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{
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bool operator ==(const LockFile & other) const
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{
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return
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flakeDeps == other.flakeDeps
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&& nonFlakeDeps == other.nonFlakeDeps;
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}
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LockFile() {}
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LockFile(const nlohmann::json & json) : FlakeInputs(json) {}
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LockFile(FlakeDep && dep)
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{
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flakeDeps = std::move(dep.flakeDeps);
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nonFlakeDeps = std::move(dep.nonFlakeDeps);
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}
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nlohmann::json toJson() const;
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static LockFile read(const Path & path);
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void write(const Path & path) const;
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};
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}
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