lix/src/nix/registry.cc

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#include "command.hh"
#include "common-args.hh"
#include "shared.hh"
#include "eval.hh"
#include "flake/flake.hh"
#include "store-api.hh"
#include "fetchers.hh"
#include "registry.hh"
using namespace nix;
using namespace nix::flake;
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class RegistryCommand: virtual Args
{
std::string registry_path;
std::shared_ptr<fetchers::Registry> registry;
public:
RegistryCommand()
{
addFlag({
.longName = "registry",
.description = "The registry to operate on.",
.labels = {"registry"},
.handler = {&registry_path},
});
}
std::shared_ptr<fetchers::Registry> getRegistry() {
if (registry) return registry;
if (registry_path.empty()) {
registry = fetchers::getUserRegistry();
} else {
registry = fetchers::getCustomRegistry(registry_path);
}
return registry;
}
Path getRegistryPath() {
if (registry_path.empty()) {
return fetchers::getUserRegistryPath();
} else {
return registry_path;
}
}
};
struct CmdRegistryList : StoreCommand
{
std::string description() override
{
return "list available Nix flakes";
}
std::string doc() override
{
return
#include "registry-list.md"
;
}
void run(nix::ref<nix::Store> store) override
{
using namespace fetchers;
auto registries = getRegistries(store);
for (auto & registry : registries) {
for (auto & entry : registry->entries) {
// FIXME: format nicely
logger->cout("%s %s %s",
registry->type == Registry::Flag ? "flags " :
registry->type == Registry::User ? "user " :
registry->type == Registry::System ? "system" :
"global",
entry.from.toURLString(),
entry.to.toURLString(attrsToQuery(entry.extraAttrs)));
}
}
}
};
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struct CmdRegistryAdd : MixEvalArgs, Command, RegistryCommand
{
std::string fromUrl, toUrl;
std::string description() override
{
return "add/replace flake in user flake registry";
}
std::string doc() override
{
return
#include "registry-add.md"
;
}
CmdRegistryAdd()
{
expectArg("from-url", &fromUrl);
expectArg("to-url", &toUrl);
}
void run() override
{
auto fromRef = parseFlakeRef(fromUrl);
auto toRef = parseFlakeRef(toUrl);
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auto registry = getRegistry();
fetchers::Attrs extraAttrs;
if (toRef.subdir != "") extraAttrs["dir"] = toRef.subdir;
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registry->remove(fromRef.input);
registry->add(fromRef.input, toRef.input, extraAttrs);
registry->write(getRegistryPath());
}
};
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struct CmdRegistryRemove : RegistryCommand, Command
{
std::string url;
std::string description() override
{
return "remove flake from user flake registry";
}
std::string doc() override
{
return
#include "registry-remove.md"
;
}
CmdRegistryRemove()
{
expectArg("url", &url);
}
void run() override
{
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auto registry = getRegistry();
registry->remove(parseFlakeRef(url).input);
registry->write(getRegistryPath());
}
};
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struct CmdRegistryPin : RegistryCommand, EvalCommand
{
std::string url;
std::string locked;
std::string description() override
{
return "pin a flake to its current version in user flake registry or to the current version of a flake URI";
}
std::string doc() override
{
return
#include "registry-pin.md"
;
}
CmdRegistryPin()
{
expectArg("url", &url);
expectArgs({
.label = "locked",
.optional = true,
.handler = {&locked},
.completer = {[&](size_t, std::string_view prefix) {
completeFlakeRef(getStore(), prefix);
}}
});
}
void run(nix::ref<nix::Store> store) override
{
if (locked.empty()) {
locked = url;
}
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auto registry = getRegistry();
auto ref = parseFlakeRef(url);
auto locked_ref = parseFlakeRef(locked);
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registry->remove(ref.input);
auto [tree, resolved] = locked_ref.resolve(store).input.fetch(store);
fetchers::Attrs extraAttrs;
if (ref.subdir != "") extraAttrs["dir"] = ref.subdir;
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registry->add(ref.input, resolved, extraAttrs);
registry->write(getRegistryPath());
}
};
struct CmdRegistry : virtual NixMultiCommand
{
CmdRegistry()
: MultiCommand({
{"list", []() { return make_ref<CmdRegistryList>(); }},
{"add", []() { return make_ref<CmdRegistryAdd>(); }},
{"remove", []() { return make_ref<CmdRegistryRemove>(); }},
{"pin", []() { return make_ref<CmdRegistryPin>(); }},
})
{
}
std::string description() override
{
return "manage the flake registry";
}
std::string doc() override
{
return
#include "registry.md"
;
}
Category category() override { return catSecondary; }
void run() override
{
if (!command)
throw UsageError("'nix registry' requires a sub-command.");
command->second->prepare();
command->second->run();
}
};
static auto rCmdRegistry = registerCommand<CmdRegistry>("registry");