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#include "primops/flake.hh"
#include "command.hh"
#include "common-args.hh"
#include "shared.hh"
#include "progress-bar.hh"
#include "eval.hh"
#include <nlohmann/json.hpp>
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 << " " << entry.second.ref.to_string() << "\n";
}
}
}
};
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));
if (json) {
nlohmann::json j;
j["location"] = flake.path;
j["description"] = flake.description;
std::cout << j.dump(4) << std::endl;
} else {
std::cout << "Description: " << flake.description << "\n";
std::cout << "Location: " << flake.path << "\n";
}
}
};
struct CmdFlakeAdd : MixEvalArgs, Command
{
std::string flakeId;
std::string flakeUri;
std::string name() override
{
return "add";
}
std::string description() override
{
return "upsert flake in user flake registry";
}
CmdFlakeAdd()
{
expectArg("flake-id", &flakeId);
expectArg("flake-uri", &flakeUri);
}
void run() override
{
FlakeRef newFlakeRef(flakeUri);
Path userRegistryPath = getUserRegistryPath();
auto userRegistry = readRegistry(userRegistryPath);
FlakeRegistry::Entry entry(newFlakeRef);
userRegistry->entries.erase(flakeId);
userRegistry->entries.insert_or_assign(flakeId, newFlakeRef);
writeRegistry(*userRegistry, userRegistryPath);
}
};
struct CmdFlakeRemove : virtual Args, MixEvalArgs, Command
{
std::string flakeId;
std::string name() override
{
return "remove";
}
std::string description() override
{
return "remove flake from user flake registry";
}
CmdFlakeRemove()
{
expectArg("flake-id", &flakeId);
}
void run() override
{
Path userRegistryPath = getUserRegistryPath();
auto userRegistry = readRegistry(userRegistryPath);
userRegistry->entries.erase(flakeId);
writeRegistry(*userRegistry, userRegistryPath);
}
};
struct CmdFlakePin : virtual Args, StoreCommand, MixEvalArgs
{
std::string flakeId;
std::string name() override
{
return "pin";
}
std::string description() override
{
return "pin flake require in user flake registry";
}
CmdFlakePin()
{
expectArg("flake-id", &flakeId);
}
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(flakeId);
if (it != userRegistry.entries.end()) {
FlakeRef oldRef = it->second.ref;
it->second.ref = getFlake(*evalState, oldRef).ref;
// The 'ref' in 'flake' is immutable.
writeRegistry(userRegistry, userRegistryPath);
} else
throw Error("the flake identifier '%s' does not exist in the user registry", flakeId);
}
};
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,
R"str(
{
name = "hello";
description = "A flake for building Hello World";
epoch = 2019;
requires = [ "nixpkgs" ];
provides = deps: rec {
packages.hello = deps.nixpkgs.provides.packages.hello;
};
}
)str");
}
};
struct CmdFlake : virtual MultiCommand, virtual Command
{
CmdFlake()
: MultiCommand({make_ref<CmdFlakeList>()
, make_ref<CmdFlakeUpdate>()
, make_ref<CmdFlakeInfo>()
, 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>());
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