lix/src/nix/flake.cc
2019-04-11 07:08:04 +02:00

304 lines
7.2 KiB
C++

#include "command.hh"
#include "common-args.hh"
#include "shared.hh"
#include "progress-bar.hh"
#include "eval.hh"
#include <nlohmann/json.hpp>
#include <queue>
using namespace nix;
struct CmdFlakeList : StoreCommand, MixEvalArgs
{
std::string name() override
{
return "list";
}
std::string description() override
{
return "list available Nix flakes";
}
void run(nix::ref<nix::Store> store) override
{
auto evalState = std::make_shared<EvalState>(searchPath, store);
auto registries = evalState->getFlakeRegistries();
stopProgressBar();
for (auto & registry : registries)
for (auto & entry : registry->entries)
std::cout << entry.first.to_string() << " " << entry.second.to_string() << "\n";
}
};
void printFlakeInfo(Flake & flake, bool json) {
if (json) {
nlohmann::json j;
j["id"] = flake.id;
j["location"] = flake.path;
j["description"] = flake.description;
std::cout << j.dump(4) << std::endl;
} else {
std::cout << "ID: " << flake.id << "\n";
std::cout << "Description: " << flake.description << "\n";
std::cout << "Location: " << flake.path << "\n";
}
}
void printNonFlakeInfo(NonFlake & nonFlake, bool json) {
if (json) {
nlohmann::json j;
j["name"] = nonFlake.alias;
j["location"] = nonFlake.path;
std::cout << j.dump(4) << std::endl;
} else {
std::cout << "name: " << nonFlake.alias << "\n";
std::cout << "Location: " << nonFlake.path << "\n";
}
}
struct CmdFlakeDeps : FlakeCommand, MixJSON, StoreCommand, MixEvalArgs
{
std::string name() override
{
return "deps";
}
std::string description() override
{
return "list informaton about dependencies";
}
void run(nix::ref<nix::Store> store) override
{
auto evalState = std::make_shared<EvalState>(searchPath, store);
FlakeRef flakeRef(flakeUri);
Dependencies deps = resolveFlake(*evalState, flakeRef, true);
std::queue<Dependencies> todo;
todo.push(deps);
while (!todo.empty()) {
deps = todo.front();
todo.pop();
for (auto & nonFlake : deps.nonFlakeDeps)
printNonFlakeInfo(nonFlake, json);
for (auto & newDeps : deps.flakeDeps)
todo.push(newDeps);
}
}
};
struct CmdFlakeUpdate : StoreCommand, GitRepoCommand, MixEvalArgs
{
std::string name() override
{
return "update";
}
std::string description() override
{
return "update flake lock file";
}
void run(nix::ref<nix::Store> store) override
{
auto evalState = std::make_shared<EvalState>(searchPath, store);
if (gitPath == "") gitPath = absPath(".");
updateLockFile(*evalState, gitPath);
}
};
struct CmdFlakeInfo : FlakeCommand, MixJSON, MixEvalArgs, StoreCommand
{
std::string name() override
{
return "info";
}
std::string description() override
{
return "list info about a given flake";
}
void run(nix::ref<nix::Store> store) override
{
auto evalState = std::make_shared<EvalState>(searchPath, store);
nix::Flake flake = nix::getFlake(*evalState, FlakeRef(flakeUri), true);
printFlakeInfo(flake, json);
}
};
struct CmdFlakeAdd : MixEvalArgs, Command
{
FlakeUri alias;
FlakeUri uri;
std::string name() override
{
return "add";
}
std::string description() override
{
return "upsert flake in user flake registry";
}
CmdFlakeAdd()
{
expectArg("alias", &alias);
expectArg("flake-uri", &uri);
}
void run() override
{
FlakeRef aliasRef(alias);
Path userRegistryPath = getUserRegistryPath();
auto userRegistry = readRegistry(userRegistryPath);
userRegistry->entries.erase(aliasRef);
userRegistry->entries.insert_or_assign(aliasRef, FlakeRef(uri));
writeRegistry(*userRegistry, userRegistryPath);
}
};
struct CmdFlakeRemove : virtual Args, MixEvalArgs, Command
{
FlakeUri alias;
std::string name() override
{
return "remove";
}
std::string description() override
{
return "remove flake from user flake registry";
}
CmdFlakeRemove()
{
expectArg("alias", &alias);
}
void run() override
{
Path userRegistryPath = getUserRegistryPath();
auto userRegistry = readRegistry(userRegistryPath);
userRegistry->entries.erase(FlakeRef(alias));
writeRegistry(*userRegistry, userRegistryPath);
}
};
struct CmdFlakePin : virtual Args, StoreCommand, MixEvalArgs
{
FlakeUri alias;
std::string name() override
{
return "pin";
}
std::string description() override
{
return "pin flake require in user flake registry";
}
CmdFlakePin()
{
expectArg("alias", &alias);
}
void run(nix::ref<nix::Store> store) override
{
auto evalState = std::make_shared<EvalState>(searchPath, store);
Path userRegistryPath = getUserRegistryPath();
FlakeRegistry userRegistry = *readRegistry(userRegistryPath);
auto it = userRegistry.entries.find(FlakeRef(alias));
if (it != userRegistry.entries.end()) {
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", alias);
}
};
struct CmdFlakeInit : virtual Args, Command
{
std::string name() override
{
return "init";
}
std::string description() override
{
return "create a skeleton 'flake.nix' file in the current directory";
}
void run() override
{
Path flakeDir = absPath(".");
if (!pathExists(flakeDir + "/.git"))
throw Error("the directory '%s' is not a Git repository", flakeDir);
Path flakePath = flakeDir + "/flake.nix";
if (pathExists(flakePath))
throw Error("file '%s' already exists", flakePath);
writeFile(flakePath,
#include "flake-template.nix.gen.hh"
);
}
};
struct CmdFlake : virtual MultiCommand, virtual Command
{
CmdFlake()
: MultiCommand({make_ref<CmdFlakeList>()
, make_ref<CmdFlakeUpdate>()
, make_ref<CmdFlakeInfo>()
, make_ref<CmdFlakeDeps>()
, make_ref<CmdFlakeAdd>()
, make_ref<CmdFlakeRemove>()
, make_ref<CmdFlakePin>()
, make_ref<CmdFlakeInit>()
})
{
}
std::string name() override
{
return "flake";
}
std::string description() override
{
return "manage Nix flakes";
}
void run() override
{
if (!command)
throw UsageError("'nix flake' requires a sub-command.");
command->run();
}
void printHelp(const string & programName, std::ostream & out) override
{
MultiCommand::printHelp(programName, out);
}
};
static RegisterCommand r1(make_ref<CmdFlake>());