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Merge pull request #2881 from NixOS/misc-fixes

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Improve lockfile warnings
This commit is contained in:
Eelco Dolstra 2019-05-21 17:22:51 +02:00 committed by GitHub
commit 8e5c86befc
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2 changed files with 47 additions and 33 deletions
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59
src/libexpr/primops/flake.cc
View file

@ -387,29 +387,17 @@ LockFile::FlakeEntry dependenciesToFlakeEntry(const ResolvedFlake & resolvedFlak
return entry;
}
bool allowedToWrite (HandleLockFile handle)
bool allowedToWrite(HandleLockFile handle)
{
if (handle == AllPure) return false;
else if (handle == TopRefUsesRegistries) return false;
else if (handle == UpdateLockFile) return true;
else if (handle == UseUpdatedLockFile) return false;
else if (handle == RecreateLockFile) return true;
else if (handle == UseNewLockFile) return false;
else assert(false);
return handle == UpdateLockFile || handle == RecreateLockFile;
}
bool recreateLockFile (HandleLockFile handle)
bool recreateLockFile(HandleLockFile handle)
{
if (handle == AllPure) return false;
else if (handle == TopRefUsesRegistries) return false;
else if (handle == UpdateLockFile) return false;
else if (handle == UseUpdatedLockFile) return false;
else if (handle == RecreateLockFile) return true;
else if (handle == UseNewLockFile) return true;
else assert(false);
return handle == RecreateLockFile || handle == UseNewLockFile;
}
bool allowedToUseRegistries (HandleLockFile handle, bool isTopRef)
bool allowedToUseRegistries(HandleLockFile handle, bool isTopRef)
{
if (handle == AllPure) return false;
else if (handle == TopRefUsesRegistries) return isTopRef;
@ -433,11 +421,11 @@ ResolvedFlake resolveFlakeFromLockFile(EvalState & state, const FlakeRef & flake
if (i != lockFile.nonFlakeEntries.end()) {
NonFlake nonFlake = getNonFlake(state, i->second.ref, nonFlakeInfo.first);
if (nonFlake.hash != i->second.contentHash)
throw Error("the content hash of flakeref %s doesn't match", i->second.ref.to_string());
throw Error("the content hash of flakeref '%s' doesn't match", i->second.ref.to_string());
deps.nonFlakeDeps.push_back(nonFlake);
} else {
if (handleLockFile == AllPure || handleLockFile == TopRefUsesRegistries)
throw Error("the lockfile requires updating nonflake dependency %s in AllPure mode", nonFlakeInfo.first);
throw Error("cannot update non-flake dependency '%s' in pure mode", nonFlakeInfo.first);
deps.nonFlakeDeps.push_back(getNonFlake(state, nonFlakeInfo.second, nonFlakeInfo.first));
}
}
@ -447,11 +435,11 @@ ResolvedFlake resolveFlakeFromLockFile(EvalState & state, const FlakeRef & flake
if (i != lockFile.flakeEntries.end()) { // Propagate lockFile downwards if possible
ResolvedFlake newResFlake = resolveFlakeFromLockFile(state, i->second.ref, handleLockFile, entryToLockFile(i->second));
if (newResFlake.flake.hash != i->second.contentHash)
throw Error("the content hash of flakeref %s doesn't match", i->second.ref.to_string());
throw Error("the content hash of flakeref '%s' doesn't match", i->second.ref.to_string());
deps.flakeDeps.insert_or_assign(newFlakeRef, newResFlake);
} else {
if (handleLockFile == AllPure || handleLockFile == TopRefUsesRegistries)
throw Error("the lockfile requires updating flake dependency %s in AllPure mode", newFlakeRef.to_string());
throw Error("cannot update flake dependency '%s' in pure mode", newFlakeRef.to_string());
deps.flakeDeps.insert_or_assign(newFlakeRef, resolveFlakeFromLockFile(state, newFlakeRef, handleLockFile));
}
}
@ -465,31 +453,36 @@ ResolvedFlake resolveFlakeFromLockFile(EvalState & state, const FlakeRef & flake
ResolvedFlake resolveFlake(EvalState & state, const FlakeRef & topRef, HandleLockFile handleLockFile)
{
Flake flake = getFlake(state, topRef, allowedToUseRegistries(handleLockFile, true));
LockFile lockFile;
LockFile oldLockFile;
if (!recreateLockFile (handleLockFile)) {
// If recreateLockFile, start with an empty lockfile
lockFile = readLockFile(flake.storePath + "/flake.lock"); // FIXME: symlink attack
oldLockFile = readLockFile(flake.storePath + "/flake.lock"); // FIXME: symlink attack
}
LockFile lockFile(oldLockFile);
ResolvedFlake resFlake = resolveFlakeFromLockFile(state, topRef, handleLockFile, lockFile, true);
lockFile = entryToLockFile(dependenciesToFlakeEntry(resFlake));
if (allowedToWrite(handleLockFile)) {
if (auto refData = std::get_if<FlakeRef::IsPath>(&topRef.data)) {
writeLockFile(lockFile, refData->path + (topRef.subdir == "" ? "" : "/" + topRef.subdir) + "/flake.lock");
if (!(lockFile == oldLockFile)) {
if (allowedToWrite(handleLockFile)) {
if (auto refData = std::get_if<FlakeRef::IsPath>(&topRef.data)) {
writeLockFile(lockFile, refData->path + (topRef.subdir == "" ? "" : "/" + topRef.subdir) + "/flake.lock");
// Hack: Make sure that flake.lock is visible to Git, so it ends up in the Nix store.
runProgram("git", true, { "-C", refData->path, "add",
(topRef.subdir == "" ? "" : topRef.subdir + "/") + "flake.lock" });
} else std::cout << "Cannot write lockfile because the FlakeRef isn't of the form IsPath." << std::endl;
} else if (handleLockFile != AllPure && handleLockFile != TopRefUsesRegistries)
std::cout << "Using updating lockfile without writing it to file" << std::endl;
// Hack: Make sure that flake.lock is visible to Git, so it ends up in the Nix store.
runProgram("git", true, { "-C", refData->path, "add",
(topRef.subdir == "" ? "" : topRef.subdir + "/") + "flake.lock" });
} else
warn("cannot write lockfile of remote flake '%s'", topRef);
} else if (handleLockFile != AllPure && handleLockFile != TopRefUsesRegistries)
warn("using updated lockfile without writing it to file");
}
return resFlake;
}
void updateLockFile (EvalState & state, const FlakeUri & flakeUri, bool recreateLockFile)
void updateLockFile(EvalState & state, const FlakeUri & flakeUri, bool recreateLockFile)
{
FlakeRef flakeRef(flakeUri);
resolveFlake(state, flakeRef, recreateLockFile ? RecreateLockFile : UpdateLockFile);

21
src/libexpr/primops/flake.hh
View file

@ -24,6 +24,11 @@ struct LockFile
FlakeRef ref;
Hash contentHash;
NonFlakeEntry(const FlakeRef & flakeRef, const Hash & hash) : ref(flakeRef), contentHash(hash) {};
bool operator ==(const NonFlakeEntry & other) const
{
return ref == other.ref && contentHash == other.contentHash;
}
};
struct FlakeEntry
@ -33,10 +38,26 @@ struct LockFile
std::map<FlakeRef, FlakeEntry> flakeEntries;
std::map<FlakeAlias, NonFlakeEntry> nonFlakeEntries;
FlakeEntry(const FlakeRef & flakeRef, const Hash & hash) : ref(flakeRef), contentHash(hash) {};
bool operator ==(const FlakeEntry & other) const
{
return
ref == other.ref
&& contentHash == other.contentHash
&& flakeEntries == other.flakeEntries
&& nonFlakeEntries == other.nonFlakeEntries;
}
};
std::map<FlakeRef, FlakeEntry> flakeEntries;
std::map<FlakeAlias, NonFlakeEntry> nonFlakeEntries;
bool operator ==(const LockFile & other) const
{
return
flakeEntries == other.flakeEntries
&& nonFlakeEntries == other.nonFlakeEntries;
}
};
typedef std::vector<std::shared_ptr<FlakeRegistry>> Registries;