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Add start of 'nix profile' command

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This commit is contained in:
Eelco Dolstra 2019-10-22 00:21:58 +02:00
parent 91a88f3acb
commit ce27920936
6 changed files with 256 additions and 3 deletions
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5
src/nix/command.cc
View file

@ -123,4 +123,9 @@ void MixProfile::updateProfile(const Buildables & buildables)
updateProfile(*result);
}
MixDefaultProfile::MixDefaultProfile()
{
profile = getDefaultProfile();
}
}

5
src/nix/command.hh
View file

@ -188,4 +188,9 @@ struct MixProfile : virtual Args, virtual StoreCommand
void updateProfile(const Buildables & buildables);
};
struct MixDefaultProfile : MixProfile
{
MixDefaultProfile();
};
}

1
src/nix/flake.cc
View file

@ -653,6 +653,7 @@ struct CmdFlake : virtual MultiCommand, virtual Command
{
if (!command)
throw UsageError("'nix flake' requires a sub-command.");
command->prepare();
command->run();
}

11
src/nix/installables.cc
View file

@ -294,7 +294,7 @@ Value * InstallableFlake::getFlakeOutputs(EvalState & state, const flake::Resolv
return (*aOutputs)->value;
}
std::vector<flake::EvalCache::Derivation> InstallableFlake::toDerivations()
std::tuple<std::string, FlakeRef, flake::EvalCache::Derivation> InstallableFlake::toDerivation()
{
auto state = cmd.getEvalState();
@ -312,7 +312,7 @@ std::vector<flake::EvalCache::Derivation> InstallableFlake::toDerivations()
auto drv = evalCache.getDerivation(fingerprint, attrPath);
if (drv) {
if (state->store->isValidPath(drv->drvPath))
return {*drv};
return {attrPath, resFlake.flake.sourceInfo.resolvedRef, *drv};
}
if (!vOutputs)
@ -334,7 +334,7 @@ std::vector<flake::EvalCache::Derivation> InstallableFlake::toDerivations()
evalCache.addDerivation(fingerprint, attrPath, drv);
return {drv};
return {attrPath, resFlake.flake.sourceInfo.resolvedRef, drv};
} catch (AttrPathNotFound & e) {
}
}
@ -343,6 +343,11 @@ std::vector<flake::EvalCache::Derivation> InstallableFlake::toDerivations()
flakeRef, concatStringsSep(", ", quoteStrings(attrPaths)));
}
std::vector<flake::EvalCache::Derivation> InstallableFlake::toDerivations()
{
return {std::get<2>(toDerivation())};
}
Value * InstallableFlake::toValue(EvalState & state)
{
auto resFlake = resolveFlake(state, flakeRef, cmd.getLockFileMode());

3
src/nix/installables.hh
View file

@ -8,6 +8,7 @@
namespace nix {
struct Value;
struct DrvInfo;
class EvalState;
class SourceExprCommand;
@ -89,6 +90,8 @@ struct InstallableFlake : InstallableValue
Value * getFlakeOutputs(EvalState & state, const flake::ResolvedFlake & resFlake);
std::tuple<std::string, FlakeRef, flake::EvalCache::Derivation> toDerivation();
std::vector<flake::EvalCache::Derivation> toDerivations() override;
Value * toValue(EvalState & state) override;

234
src/nix/profile.cc Normal file
View file

@ -0,0 +1,234 @@
#include "command.hh"
#include "common-args.hh"
#include "shared.hh"
#include "store-api.hh"
#include "derivations.hh"
#include "archive.hh"
#include "builtins/buildenv.hh"
#include "flake/flakeref.hh"
#include <nlohmann/json.hpp>
using namespace nix;
struct ProfileElementSource
{
FlakeRef originalRef;
FlakeRef resolvedRef;
std::string attrPath;
// FIXME: output names
};
struct ProfileElement
{
PathSet storePaths;
std::optional<ProfileElementSource> source;
bool active = true;
// FIXME: priority
};
struct ProfileManifest
{
std::vector<ProfileElement> elements;
ProfileManifest(const Path & profile)
{
auto manifestPath = profile + "/manifest.json";
if (pathExists(manifestPath)) {
auto json = nlohmann::json::parse(readFile(manifestPath));
auto version = json.value("version", 0);
if (version != 1)
throw Error("profile manifest '%s' has unsupported version %d", manifestPath, version);
for (auto & e : json["elements"]) {
ProfileElement element;
for (auto & p : e["storePaths"])
element.storePaths.insert((std::string) p);
element.active = e["active"];
if (e.value("uri", "") != "") {
element.source = ProfileElementSource{
FlakeRef(e["originalUri"]),
FlakeRef(e["uri"]),
e["attrPath"]
};
}
elements.emplace_back(std::move(element));
}
}
}
std::string toJSON() const
{
auto array = nlohmann::json::array();
for (auto & element : elements) {
auto paths = nlohmann::json::array();
for (auto & path : element.storePaths)
paths.push_back(path);
nlohmann::json obj;
obj["storePaths"] = paths;
obj["active"] = element.active;
if (element.source) {
obj["originalUri"] = element.source->originalRef.to_string();
obj["uri"] = element.source->resolvedRef.to_string();
obj["attrPath"] = element.source->attrPath;
}
array.push_back(obj);
}
nlohmann::json json;
json["version"] = 1;
json["elements"] = array;
return json.dump();
}
Path build(ref<Store> store)
{
auto tempDir = createTempDir();
ValidPathInfo info;
Packages pkgs;
for (auto & element : elements) {
for (auto & path : element.storePaths) {
if (element.active)
pkgs.emplace_back(path, true, 5);
info.references.insert(path);
}
}
buildProfile(tempDir, std::move(pkgs));
writeFile(tempDir + "/manifest.json", toJSON());
/* Add the symlink tree to the store. */
StringSink sink;
dumpPath(tempDir, sink);
info.narHash = hashString(htSHA256, *sink.s);
info.narSize = sink.s->size();
info.path = store->makeFixedOutputPath(true, info.narHash, "profile", info.references);
info.ca = makeFixedOutputCA(true, info.narHash);
store->addToStore(info, sink.s);
return info.path;
}
};
struct CmdProfileInstall : InstallablesCommand, MixDefaultProfile
{
std::string description() override
{
return "install a package into a profile";
}
Examples examples() override
{
return {
Example{
"To install a package from Nixpkgs:",
"nix profile install nixpkgs#hello"
},
Example{
"To install a package from a specific branch of Nixpkgs:",
"nix profile install nixpkgs/release-19.09#hello"
},
Example{
"To install a package from a specific revision of Nixpkgs:",
"nix profile install nixpkgs/1028bb33859f8dfad7f98e1c8d185f3d1aaa7340#hello"
},
};
}
void run(ref<Store> store) override
{
ProfileManifest manifest(*profile);
PathSet pathsToBuild;
for (auto & installable : installables) {
if (auto installable2 = std::dynamic_pointer_cast<InstallableFlake>(installable)) {
auto [attrPath, resolvedRef, drv] = installable2->toDerivation();
ProfileElement element;
element.storePaths = {drv.outPath}; // FIXME
element.source = ProfileElementSource{
installable2->flakeRef,
resolvedRef,
attrPath,
};
pathsToBuild.insert(makeDrvPathWithOutputs(drv.drvPath, {"out"})); // FIXME
manifest.elements.emplace_back(std::move(element));
} else
throw Error("'nix profile install' does not support argument '%s'", installable->what());
}
store->buildPaths(pathsToBuild);
updateProfile(manifest.build(store));
}
};
struct CmdProfileInfo : virtual StoreCommand, MixDefaultProfile
{
std::string description() override
{
return "info";
}
Examples examples() override
{
return {
Example{
"To show what packages are installed in the default profile:",
"nix profile info"
},
};
}
void run(ref<Store> store) override
{
ProfileManifest manifest(*profile);
for (auto & element : manifest.elements) {
std::cout << fmt("%s %s\n",
element.source ? element.source->originalRef.to_string() + "#" + element.source->attrPath : "-",
element.source ? element.source->resolvedRef.to_string() + "#" + element.source->attrPath : "-",
concatStringsSep(" ", element.storePaths));
}
}
};
struct CmdProfile : virtual MultiCommand, virtual Command
{
CmdProfile()
: MultiCommand({
{"install", []() { return make_ref<CmdProfileInstall>(); }},
{"info", []() { return make_ref<CmdProfileInfo>(); }},
})
{ }
std::string description() override
{
return "manage Nix profiles";
}
void run() override
{
if (!command)
throw UsageError("'nix profile' requires a sub-command.");
command->prepare();
command->run();
}
void printHelp(const string & programName, std::ostream & out) override
{
MultiCommand::printHelp(programName, out);
}
};
static auto r1 = registerCommand<CmdProfile>("profile");