max/nix-super
1
0
Fork 0
mirror of https://github.com/privatevoid-net/nix-super.git synced 2024-11-10 16:26:18 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Only rewrite the lockfile if it changed

Browse source 
This removes spurious warnings about failure to write the lockfile.
This commit is contained in:
Eelco Dolstra 2019-05-21 14:55:43 +02:00
parent 818c8da5b8
commit 20a1a65d37
2 changed files with 37 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
src/libexpr/primops/flake.cc
View file

@ -465,31 +465,35 @@ 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 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;
}
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;