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FlakeRegistry = FlakeRef -> FlakeRef

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This commit is contained in:
Nick Van den Broeck 2019-04-08 19:03:00 +02:00
parent c64f98b883
commit 4ad4e48668
8 changed files with 105 additions and 180 deletions
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4
flake-registry.json
View file

@ -1,5 +1,4 @@
{
"version": 1,
"flakes": {
"dwarffs": {
"uri": "github:edolstra/dwarffs/flake"
@ -7,5 +6,6 @@
"nixpkgs": {
"uri": "github:edolstra/nixpkgs/flake"
}
}
},
"version": 1
}

165
src/libexpr/primops/flake.cc
View file

@ -28,10 +28,8 @@ std::shared_ptr<FlakeRegistry> readRegistry(const Path & path)
throw Error("flake registry '%s' has unsupported version %d", path, version);
auto flakes = json["flakes"];
for (auto i = flakes.begin(); i != flakes.end(); ++i) {
FlakeRegistry::Entry entry{FlakeRef(i->value("uri", ""))};
registry->entries.emplace(i.key(), entry);
}
for (auto i = flakes.begin(); i != flakes.end(); ++i)
registry->entries.emplace(i.key(), FlakeRef(i->value("uri", "")));
return registry;
}
@ -41,9 +39,8 @@ void writeRegistry(FlakeRegistry registry, Path path)
{
nlohmann::json json;
json["version"] = 1;
for (auto elem : registry.entries) {
json["flakes"][elem.first] = { {"uri", elem.second.ref.to_string()} };
}
for (auto elem : registry.entries)
json["flakes"][elem.first.to_string()] = { {"uri", elem.second.to_string()} };
createDirs(dirOf(path));
writeFile(path, json.dump(4)); // The '4' is the number of spaces used in the indentation in the json file.
}
@ -127,106 +124,31 @@ void writeLockFile(LockFile lockFile, Path path)
writeFile(path, json.dump(4)); // '4' = indentation in json file
}
Path getUserRegistryPath()
>>>>>>> Fixed dependency resolution
std::shared_ptr<FlakeRegistry> getGlobalRegistry()
{
FlakeRef flakeRef(json["uri"]);
if (!flakeRef.isImmutable())
throw Error("requested to fetch FlakeRef '%s' purely, which is mutable", flakeRef.to_string());
LockFile::FlakeEntry entry(flakeRef);
auto nonFlakeRequires = json["nonFlakeRequires"];
for (auto i = nonFlakeRequires.begin(); i != nonFlakeRequires.end(); ++i) {
FlakeRef flakeRef(i->value("uri", ""));
if (!flakeRef.isImmutable())
throw Error("requested to fetch FlakeRef '%s' purely, which is mutable", flakeRef.to_string());
entry.nonFlakeEntries.insert_or_assign(i.key(), flakeRef);
}
auto requires = json["requires"];
for (auto i = requires.begin(); i != requires.end(); ++i)
entry.flakeEntries.insert_or_assign(i.key(), readFlakeEntry(*i));
return entry;
}
LockFile readLockFile(const Path & path)
{
LockFile lockFile;
if (!pathExists(path))
return lockFile;
auto json = nlohmann::json::parse(readFile(path));
auto version = json.value("version", 0);
if (version != 1)
throw Error("lock file '%s' has unsupported version %d", path, version);
auto nonFlakeRequires = json["nonFlakeRequires"];
for (auto i = nonFlakeRequires.begin(); i != nonFlakeRequires.end(); ++i) {
FlakeRef flakeRef(i->value("uri", ""));
if (!flakeRef.isImmutable())
throw Error("requested to fetch FlakeRef '%s' purely, which is mutable", flakeRef.to_string());
lockFile.nonFlakeEntries.insert_or_assign(i.key(), flakeRef);
}
auto requires = json["requires"];
for (auto i = requires.begin(); i != requires.end(); ++i)
lockFile.flakeEntries.insert_or_assign(i.key(), readFlakeEntry(*i));
return lockFile;
}
nlohmann::json flakeEntryToJson(LockFile::FlakeEntry & entry)
{
nlohmann::json json;
json["uri"] = entry.ref.to_string();
for (auto & x : entry.nonFlakeEntries)
json["nonFlakeRequires"][x.first]["uri"] = x.second.to_string();
for (auto & x : entry.flakeEntries)
json["requires"][x.first] = flakeEntryToJson(x.second);
return json;
}
void writeLockFile(LockFile lockFile, Path path)
{
nlohmann::json json;
json["version"] = 1;
json["nonFlakeRequires"];
for (auto & x : lockFile.nonFlakeEntries)
json["nonFlakeRequires"][x.first]["uri"] = x.second.to_string();
for (auto & x : lockFile.flakeEntries)
json["requires"][x.first] = flakeEntryToJson(x.second);
createDirs(dirOf(path));
writeFile(path, json.dump(4)); // '4' = indentation in json file
return std::make_shared<FlakeRegistry>();
}
Path getUserRegistryPath()
{
return getHome() + "/.config/nix/registry.json";
}
std::shared_ptr<FlakeRegistry> getGlobalRegistry()
{
// FIXME: get from nixos.org.
Path registryFile = settings.nixDataDir + "/nix/flake-registry.json";
return readRegistry(registryFile);
}
std::shared_ptr<FlakeRegistry> getUserRegistry()
{
return readRegistry(getUserRegistryPath());
}
std::shared_ptr<FlakeRegistry> getLocalRegistry()
{
Path registryFile = settings.nixDataDir + "/nix/flake-registry.json";
return readRegistry(registryFile);
}
std::shared_ptr<FlakeRegistry> getFlagRegistry()
{
// TODO (Nick): Implement this.
return std::make_shared<FlakeRegistry>();
// TODO: Implement this once the right flags are implemented.
}
const std::vector<std::shared_ptr<FlakeRegistry>> EvalState::getFlakeRegistries()
@ -259,9 +181,9 @@ Value * makeFlakeRegistryValue(EvalState & state)
for (auto & registry : registries) {
for (auto & entry : registry->entries) {
auto vEntry = state.allocAttr(*v, entry.first);
auto vEntry = state.allocAttr(*v, entry.first.to_string());
state.mkAttrs(*vEntry, 2);
mkString(*state.allocAttr(*vEntry, state.symbols.create("uri")), entry.second.ref.to_string());
mkString(*state.allocAttr(*vEntry, state.symbols.create("uri")), entry.second.to_string());
vEntry->attrs->sort();
}
}
@ -272,22 +194,29 @@ Value * makeFlakeRegistryValue(EvalState & state)
}
static FlakeRef lookupFlake(EvalState & state, const FlakeRef & flakeRef,
std::vector<std::shared_ptr<FlakeRegistry>> registries)
std::vector<std::shared_ptr<FlakeRegistry>> registries, std::vector<FlakeRef> pastSearches = {})
{
if (auto refData = std::get_if<FlakeRef::IsAlias>(&flakeRef.data)) {
for (auto registry : registries) {
auto i = registry->entries.find(refData->alias);
for (std::shared_ptr<FlakeRegistry> registry : registries) {
auto i = registry->entries.find(flakeRef);
if (i != registry->entries.end()) {
auto newRef = FlakeRef(i->second.ref);
if (!newRef.isDirect())
throw Error("found indirect flake URI '%s' in the flake registry", i->second.ref.to_string());
if (flakeRef.ref) newRef.setRef(*flakeRef.ref);
if (flakeRef.rev) newRef.setRev(*flakeRef.rev);
return newRef;
auto newRef = i->second;
if (std::get_if<FlakeRef::IsAlias>(&flakeRef.data)) {
if (flakeRef.ref) newRef.ref = flakeRef.ref;
if (flakeRef.rev) newRef.rev = flakeRef.rev;
}
std::string errorMsg = "found cycle in flake registries: ";
for (FlakeRef oldRef : pastSearches) {
errorMsg += oldRef.to_string();
if (oldRef == newRef)
throw Error(errorMsg);
errorMsg += " - ";
}
pastSearches.push_back(newRef);
return lookupFlake(state, newRef, registries, pastSearches);
}
}
throw Error("cannot find flake with alias '%s' in the flake registry or in the flake lock file", refData->alias);
} else
if (!flakeRef.isDirect())
throw Error("indirect flake URI '%s' is the result of a lookup", flakeRef.to_string());
return flakeRef;
}
@ -302,6 +231,7 @@ static FlakeSourceInfo fetchFlake(EvalState & state, const FlakeRef flakeRef, bo
{
FlakeRef fRef = lookupFlake(state, flakeRef, state.getFlakeRegistries());
// This only downloads only one revision of the repo, not the entire history.
if (auto refData = std::get_if<FlakeRef::IsGitHub>(&fRef.data)) {
if (evalSettings.pureEval && !impureIsAllowed && !fRef.isImmutable())
throw Error("requested to fetch FlakeRef '%s' purely, which is mutable", fRef.to_string());
@ -332,6 +262,7 @@ static FlakeSourceInfo fetchFlake(EvalState & state, const FlakeRef flakeRef, bo
return info;
}
// This downloads the entire git history
else if (auto refData = std::get_if<FlakeRef::IsGit>(&fRef.data)) {
auto gitInfo = exportGit(state.store, refData->uri, fRef.ref,
fRef.rev ? fRef.rev->to_string(Base16, false) : "", "source");
@ -342,7 +273,7 @@ static FlakeSourceInfo fetchFlake(EvalState & state, const FlakeRef flakeRef, bo
return info;
}
else if (auto refData = std::get_if<FlakeRef::IsPath>(&directFlakeRef.data)) {
else if (auto refData = std::get_if<FlakeRef::IsPath>(&fRef.data)) {
if (!pathExists(refData->path + "/.git"))
throw Error("flake '%s' does not reference a Git repository", refData->path);
auto gitInfo = exportGit(state.store, refData->path, {}, "", "source");
@ -452,7 +383,7 @@ NonFlake getNonFlake(EvalState & state, const FlakeRef & flakeRef, FlakeAlias al
dependencies.
FIXME: this should return a graph of flakes.
*/
Dependencies resolveFlake(EvalState & state, const FlakeRef & topRef, bool impureTopRef, bool isTopFlake = true)
Dependencies resolveFlake(EvalState & state, const FlakeRef & topRef, bool impureTopRef, bool isTopFlake)
{
Flake flake = getFlake(state, topRef, isTopFlake && impureTopRef);
Dependencies deps(flake);
@ -461,7 +392,7 @@ Dependencies resolveFlake(EvalState & state, const FlakeRef & topRef, bool impur
deps.nonFlakeDeps.push_back(getNonFlake(state, nonFlakeInfo.second, nonFlakeInfo.first));
for (auto & newFlakeRef : flake.requires)
deps.flakeDeps.push_back(resolveFlake(state, newFlakeRef, impureTopRef, false));
deps.flakeDeps.push_back(resolveFlake(state, newFlakeRef, false));
return deps;
}
@ -505,25 +436,23 @@ void updateLockFile(EvalState & state, Path path)
// Return the `provides` of the top flake, while assigning to `v` the provides
// of the dependencies as well.
Value * makeFlakeValue(EvalState & state, FlakeUri flakeUri, Value & v)
Value * makeFlakeValue(EvalState & state, const FlakeRef & flakeRef, bool impureTopRef, Value & v)
{
FlakeRef flakeRef = FlakeRef(flakeUri);
Dependencies deps = resolveFlake(state, flakeRef, impureTopRef);
Dependencies deps = resolveFlake(state, flakeRef, impure);
// // FIXME: we should call each flake with only its dependencies
// // (rather than the closure of the top-level flake).
// FIXME: we should call each flake with only its dependencies
// (rather than the closure of the top-level flake).
auto vResult = state.allocValue();
// This will store the attribute set of the `nonFlakeRequires` and the `requires.provides`.
state.mkAttrs(*vResult, deps.flakeDeps.size());
Value * vTop = 0;
Value * vTop = state.allocAttr(*vResult, deps.flake.id);
for (auto & flake : deps.flakeDeps) {
for (auto & dep : deps.flakeDeps) {
Flake flake = dep.flake;
auto vFlake = state.allocAttr(*vResult, flake.id);
if (deps.topFlakeId == flake.id) vTop = vFlake;
state.mkAttrs(*vFlake, 4);
@ -532,7 +461,7 @@ Value * makeFlakeValue(EvalState & state, FlakeUri flakeUri, Value & v)
state.store->assertStorePath(flake.path);
mkString(*state.allocAttr(*vFlake, state.sOutPath), flake.path, {flake.path});
if (flake.second.revCount)
if (flake.revCount)
mkInt(*state.allocAttr(*vFlake, state.symbols.create("revCount")), *flake.revCount);
auto vProvides = state.allocAttr(*vFlake, state.symbols.create("provides"));

10
src/libexpr/primops/flake.hh
View file

@ -10,13 +10,7 @@ class EvalState;
struct FlakeRegistry
{
struct Entry
{
FlakeRef ref;
Entry(const FlakeRef & flakeRef) : ref(flakeRef) {};
Entry operator=(const Entry & entry) { return Entry(entry.ref); }
};
std::map<FlakeAlias, Entry> entries;
std::map<FlakeRef, FlakeRef> entries;
};
struct LockFile
@ -79,7 +73,7 @@ struct Dependencies
Dependencies(const Flake & flake) : flake(flake) {}
};
Dependencies resolveFlake(EvalState &, const FlakeRef &, bool impureTopRef, bool isTopFlake);
Dependencies resolveFlake(EvalState &, const FlakeRef &, bool impureTopRef, bool isTopFlake = true);
FlakeRegistry updateLockFile(EvalState &, Flake &);

50
src/libexpr/primops/flakeref.hh
View file

@ -103,48 +103,60 @@ typedef std::string FlakeUri;
struct FlakeRef
{
std::optional<std::string> ref;
std::optional<Hash> rev;
struct IsAlias
{
FlakeAlias alias;
bool operator<(const IsAlias & b) const { return alias < b.alias; };
bool operator==(const IsAlias & b) const { return alias == b.alias; };
};
struct IsGitHub
{
struct IsGitHub {
std::string owner, repo;
bool operator<(const IsGitHub & b) const {
return std::make_tuple(owner, repo) < std::make_tuple(b.owner, b.repo);
}
bool operator==(const IsGitHub & b) const {
return owner == b.owner && repo == b.repo;
}
};
// Git, Tarball
struct IsGit
{
std::string uri;
bool operator<(const IsGit & b) const { return uri < b.uri; }
bool operator==(const IsGit & b) const { return uri == b.uri; }
};
struct IsPath
{
Path path;
bool operator<(const IsPath & b) const { return path < b.path; }
bool operator==(const IsPath & b) const { return path == b.path; }
};
// Git, Tarball
std::variant<IsFlakeId, IsGitHub, IsGit, IsPath> data;
std::variant<IsAlias, IsGitHub, IsGit, IsPath> data;
std::optional<std::string> ref;
std::optional<Hash> rev;
bool operator<(const FlakeRef & flakeRef) const
{
return std::make_tuple(this->data, ref, rev) <
std::make_tuple(flakeRef.data, flakeRef.ref, flakeRef.rev);
}
bool operator==(const FlakeRef & flakeRef) const
{
return std::make_tuple(this->data, ref, rev) ==
std::make_tuple(flakeRef.data, flakeRef.ref, flakeRef.rev);
}
// Parse a flake URI.
FlakeRef(const std::string & uri, bool allowRelative = false);
// Default constructor
FlakeRef(const FlakeRef & flakeRef) : data(flakeRef.data) {};
/* Unify two flake references so that the resulting reference
combines the information from both. For example,
"nixpkgs/<hash>" and "github:NixOS/nixpkgs" unifies to
"nixpkgs/master". May throw an exception if the references are
incompatible (e.g. "nixpkgs/<hash1>" and "nixpkgs/<hash2>",
where hash1 != hash2). */
FlakeRef(const FlakeRef & a, const FlakeRef & b);
// FIXME: change to operator <<.
std::string to_string() const;
@ -160,9 +172,5 @@ struct FlakeRef
bool isImmutable() const;
FlakeRef baseRef() const;
void setRef(std::optional<std::string> ref) { ref = ref; }
void setRev(std::optional<Hash> rev) { rev = rev; }
};
}

3
src/nix/build.cc
View file

@ -1,4 +1,3 @@
#include "primops/flake.hh"
#include "eval.hh"
#include "command.hh"
#include "common-args.hh"
@ -78,7 +77,7 @@ struct CmdBuild : MixDryRun, InstallablesCommand
}
}
// std::string flakeUri = "";
// FlakeUri flakeUri = "";
// if(updateLock)
// for (uint i = 0; i < installables.size(); i++)
// // if (auto flakeUri = installableToFlakeUri)

3
src/nix/command.hh
View file

@ -1,6 +1,7 @@
#pragma once
#include "args.hh"
#include "primops/flake.hh"
#include "common-eval-args.hh"
namespace nix {
@ -46,7 +47,7 @@ struct GitRepoCommand : virtual Args
struct FlakeCommand : virtual Args
{
std::string flakeUri;
FlakeUri flakeUri;
FlakeCommand()
{

45
src/nix/flake.cc
View file

@ -1,4 +1,3 @@
#include "primops/flake.hh"
#include "command.hh"
#include "common-args.hh"
#include "shared.hh"
@ -29,11 +28,9 @@ struct CmdFlakeList : StoreCommand, MixEvalArgs
stopProgressBar();
for (auto & registry : registries) {
for (auto & entry : registry->entries) {
std::cout << entry.first << " " << entry.second.ref.to_string() << "\n";
}
}
for (auto & registry : registries)
for (auto & entry : registry->entries)
std::cout << entry.first.to_string() << " " << entry.second.to_string() << "\n";
}
};
@ -81,7 +78,7 @@ struct CmdFlakeDeps : FlakeCommand, MixJSON, StoreCommand, MixEvalArgs
FlakeRef flakeRef(flakeUri);
Dependencies deps = resolveFlake(*evalState, flakeRef, true, true);
Dependencies deps = resolveFlake(*evalState, flakeRef, true);
std::queue<Dependencies> todo;
todo.push(deps);
@ -135,15 +132,15 @@ struct CmdFlakeInfo : FlakeCommand, MixJSON, MixEvalArgs, StoreCommand
void run(nix::ref<nix::Store> store) override
{
auto evalState = std::make_shared<EvalState>(searchPath, store);
nix::Flake flake = nix::getFlake(*evalState, FlakeRef(flakeUri));
nix::Flake flake = nix::getFlake(*evalState, FlakeRef(flakeUri), true);
printFlakeInfo(flake, json);
}
};
struct CmdFlakeAdd : MixEvalArgs, Command
{
FlakeAlias flakeAlias;
FlakeUri flakeUri;
FlakeUri alias;
FlakeUri uri;
std::string name() override
{
@ -157,25 +154,24 @@ struct CmdFlakeAdd : MixEvalArgs, Command
CmdFlakeAdd()
{
expectArg("flake-id", &flakeAlias);
expectArg("flake-uri", &flakeUri);
expectArg("alias", &alias);
expectArg("flake-uri", &uri);
}
void run() override
{
FlakeRef newFlakeRef(flakeUri);
FlakeRef aliasRef(alias);
Path userRegistryPath = getUserRegistryPath();
auto userRegistry = readRegistry(userRegistryPath);
FlakeRegistry::Entry entry(newFlakeRef);
userRegistry->entries.erase(flakeAlias);
userRegistry->entries.insert_or_assign(flakeAlias, newFlakeRef);
userRegistry->entries.erase(aliasRef);
userRegistry->entries.insert_or_assign(aliasRef, FlakeRef(uri));
writeRegistry(*userRegistry, userRegistryPath);
}
};
struct CmdFlakeRemove : virtual Args, MixEvalArgs, Command
{
FlakeAlias flakeAlias;
FlakeUri alias;
std::string name() override
{
@ -189,21 +185,21 @@ struct CmdFlakeRemove : virtual Args, MixEvalArgs, Command
CmdFlakeRemove()
{
expectArg("flake-id", &flakeAlias);
expectArg("alias", &alias);
}
void run() override
{
Path userRegistryPath = getUserRegistryPath();
auto userRegistry = readRegistry(userRegistryPath);
userRegistry->entries.erase(flakeAlias);
userRegistry->entries.erase(FlakeRef(alias));
writeRegistry(*userRegistry, userRegistryPath);
}
};
struct CmdFlakePin : virtual Args, StoreCommand, MixEvalArgs
{
FlakeAlias flakeAlias;
FlakeUri alias;
std::string name() override
{
@ -217,7 +213,7 @@ struct CmdFlakePin : virtual Args, StoreCommand, MixEvalArgs
CmdFlakePin()
{
expectArg("flake-id", &flakeAlias);
expectArg("alias", &alias);
}
void run(nix::ref<nix::Store> store) override
@ -226,14 +222,13 @@ struct CmdFlakePin : virtual Args, StoreCommand, MixEvalArgs
Path userRegistryPath = getUserRegistryPath();
FlakeRegistry userRegistry = *readRegistry(userRegistryPath);
auto it = userRegistry.entries.find(flakeAlias);
auto it = userRegistry.entries.find(FlakeRef(alias));
if (it != userRegistry.entries.end()) {
FlakeRef oldRef = it->second.ref;
it->second.ref = getFlake(*evalState, oldRef, true).ref;
it->second = getFlake(*evalState, it->second, true).ref;
// The 'ref' in 'flake' is immutable.
writeRegistry(userRegistry, userRegistryPath);
} else
throw Error("the flake alias '%s' does not exist in the user registry", flakeAlias);
throw Error("the flake alias '%s' does not exist in the user registry", alias);
}
};

1
src/nix/installables.cc
View file

@ -7,7 +7,6 @@
#include "get-drvs.hh"
#include "store-api.hh"
#include "shared.hh"
#include "primops/flake.hh"
#include <regex>