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Fix lock file generation

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Before:

   "requires": {
        "nixpkgs": {
            "uri": "nixpkgs"
        }
    },

After:

    "requires": {
        "nixpkgs": {
            "uri": "github:edolstra/nixpkgs/f10e8a02eb7fa2b4a070f30cf87f4efcc7f3186d"
        }
    },
This commit is contained in:
Eelco Dolstra 2019-04-16 15:40:58 +02:00
parent 8c4e759efd
commit 3d0e81051f
4 changed files with 42 additions and 35 deletions
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53
src/libexpr/primops/flake.cc
View file

@ -188,13 +188,6 @@ static FlakeRef lookupFlake(EvalState & state, const FlakeRef & flakeRef,
return flakeRef;
}
struct FlakeSourceInfo
{
Path storePath;
std::optional<Hash> rev;
std::optional<uint64_t> revCount;
};
static FlakeSourceInfo fetchFlake(EvalState & state, const FlakeRef flakeRef, bool impureIsAllowed = false)
{
FlakeRef fRef = lookupFlake(state, flakeRef,
@ -226,9 +219,11 @@ static FlakeSourceInfo fetchFlake(EvalState & state, const FlakeRef flakeRef, bo
if (result.etag->size() != 42 || (*result.etag)[0] != '"' || (*result.etag)[41] != '"')
throw Error("ETag header '%s' from '%s' is not a Git revision", *result.etag, url);
FlakeSourceInfo info;
FlakeSourceInfo info(fRef);
info.storePath = result.path;
info.rev = Hash(std::string(*result.etag, 1, result.etag->size() - 2), htSHA1);
info.flakeRef.rev = info.rev;
info.flakeRef.ref = {};
return info;
}
@ -237,10 +232,12 @@ static FlakeSourceInfo fetchFlake(EvalState & state, const FlakeRef flakeRef, bo
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");
FlakeSourceInfo info;
FlakeSourceInfo info(fRef);
info.storePath = gitInfo.storePath;
info.rev = Hash(gitInfo.rev, htSHA1);
info.revCount = gitInfo.revCount;
info.flakeRef.rev = info.rev;
// FIXME: ensure info.flakeRef.ref is set.
return info;
}
@ -248,10 +245,11 @@ static FlakeSourceInfo fetchFlake(EvalState & state, const FlakeRef flakeRef, bo
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");
FlakeSourceInfo info;
FlakeSourceInfo info(fRef);
info.storePath = gitInfo.storePath;
info.rev = Hash(gitInfo.rev, htSHA1);
info.revCount = gitInfo.revCount;
info.flakeRef.rev = info.rev;
return info;
}
@ -265,24 +263,21 @@ Flake getFlake(EvalState & state, const FlakeRef & flakeRef, bool impureIsAllowe
debug("got flake source '%s' with revision %s",
sourceInfo.storePath, sourceInfo.rev.value_or(Hash(htSHA1)).to_string(Base16, false));
auto flakePath = sourceInfo.storePath;
state.store->assertStorePath(flakePath);
state.store->assertStorePath(sourceInfo.storePath);
if (state.allowedPaths)
state.allowedPaths->insert(flakePath);
state.allowedPaths->insert(sourceInfo.storePath);
Flake flake(flakeRef);
Flake flake(flakeRef, std::move(sourceInfo));
if (std::get_if<FlakeRef::IsGitHub>(&flakeRef.data)) {
if (sourceInfo.rev)
// FIXME: ehm?
if (flake.sourceInfo.rev)
flake.ref = FlakeRef(flakeRef.baseRef().to_string()
+ "/" + sourceInfo.rev->to_string(Base16, false));
+ "/" + flake.sourceInfo.rev->to_string(Base16, false));
}
flake.path = flakePath;
flake.revCount = sourceInfo.revCount;
Value vInfo;
state.evalFile(flakePath + "/flake.nix", vInfo); // FIXME: symlink attack
state.evalFile(sourceInfo.storePath + "/flake.nix", vInfo); // FIXME: symlink attack
state.forceAttrs(vInfo);
@ -317,7 +312,7 @@ Flake getFlake(EvalState & state, const FlakeRef & flakeRef, bool impureIsAllowe
} else
throw Error("flake lacks attribute 'provides'");
const Path lockFile = flakePath + "/flake.lock"; // FIXME: symlink attack
Path lockFile = sourceInfo.storePath + "/flake.lock"; // FIXME: symlink attack
flake.lockFile = readLockFile(lockFile);
@ -373,7 +368,7 @@ Dependencies resolveFlake(EvalState & state, const FlakeRef & topRef,
LockFile::FlakeEntry dependenciesToFlakeEntry(const Dependencies & deps)
{
LockFile::FlakeEntry entry(deps.flake.ref);
LockFile::FlakeEntry entry(deps.flake.sourceInfo.flakeRef);
for (auto & deps : deps.flakeDeps)
entry.flakeEntries.insert_or_assign(deps.flake.id, dependenciesToFlakeEntry(deps));
@ -396,7 +391,10 @@ static LockFile makeLockFile(EvalState & evalState, FlakeRef & flakeRef)
void updateLockFile(EvalState & state, const Path & path)
{
FlakeRef flakeRef = FlakeRef("file://" + path); // FIXME: ugly
// FIXME: don't copy 'path' to the store (especially since we
// dirty it immediately afterwards).
FlakeRef flakeRef = FlakeRef(path); // FIXME: ugly
auto lockFile = makeLockFile(state, flakeRef);
writeLockFile(lockFile, path + "/flake.lock");
@ -427,11 +425,12 @@ void callFlake(EvalState & state, const Dependencies & flake, Value & v)
mkString(*state.allocAttr(v, state.sDescription), flake.flake.description);
state.store->isValidPath(flake.flake.path);
mkString(*state.allocAttr(v, state.sOutPath), flake.flake.path, {flake.flake.path});
auto & path = flake.flake.sourceInfo.storePath;
state.store->isValidPath(path);
mkString(*state.allocAttr(v, state.sOutPath), path, {path});
if (flake.flake.revCount)
mkInt(*state.allocAttr(v, state.symbols.create("revCount")), *flake.flake.revCount);
if (flake.flake.sourceInfo.revCount)
mkInt(*state.allocAttr(v, state.symbols.create("revCount")), *flake.flake.sourceInfo.revCount);
auto vProvides = state.allocAttr(v, state.symbols.create("provides"));
mkApp(*vProvides, *flake.flake.vProvides, v);

18
src/libexpr/primops/flake.hh
View file

@ -37,20 +37,28 @@ std::shared_ptr<FlakeRegistry> readRegistry(const Path &);
void writeRegistry(const FlakeRegistry &, const Path &);
struct FlakeSourceInfo
{
FlakeRef flakeRef;
Path storePath;
std::optional<Hash> rev;
std::optional<uint64_t> revCount;
// date
FlakeSourceInfo(const FlakeRef & flakeRef) : flakeRef(flakeRef) { }
};
struct Flake
{
FlakeId id;
FlakeRef ref;
std::string description;
Path path;
std::optional<uint64_t> revCount;
FlakeSourceInfo sourceInfo;
std::vector<FlakeRef> requires;
LockFile lockFile;
std::map<FlakeAlias, FlakeRef> nonFlakeRequires;
Value * vProvides; // FIXME: gc
// date
// content hash
Flake(const FlakeRef flakeRef) : ref(flakeRef) {};
Flake(const FlakeRef & flakeRef, FlakeSourceInfo && sourceInfo)
: ref(flakeRef), sourceInfo(sourceInfo) {};
};
struct NonFlake

2
src/libexpr/primops/flakeref.cc
View file

@ -123,7 +123,7 @@ std::string FlakeRef::to_string() const
string = refData->alias;
else if (auto refData = std::get_if<FlakeRef::IsGitHub>(&data)) {
assert(!ref || !rev);
assert(!(ref && rev));
string = "github:" + refData->owner + "/" + refData->repo;
}

4
src/nix/flake.cc
View file

@ -40,13 +40,13 @@ void printFlakeInfo(Flake & flake, bool json) {
if (json) {
nlohmann::json j;
j["id"] = flake.id;
j["location"] = flake.path;
j["location"] = flake.sourceInfo.storePath;
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";
std::cout << "Location: " << flake.sourceInfo.storePath << "\n";
}
}