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Fixed issue 65

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lockfile updating
This commit is contained in:
Nick Van den Broeck 2019-05-01 11:38:48 +02:00
parent b531695331
commit d9ad3723d5
6 changed files with 90 additions and 75 deletions
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91
src/libexpr/primops/flake.cc
View file

@ -289,8 +289,6 @@ Flake getFlake(EvalState & state, const FlakeRef & flakeRef, bool impureIsAllowe
FlakeRef resolvedRef = sourceInfo.resolvedRef;
resolvedRef = sourceInfo.resolvedRef; // `resolvedRef` is now immutable
state.store->assertStorePath(sourceInfo.storePath);
if (state.allowedPaths)
@ -368,35 +366,59 @@ NonFlake getNonFlake(EvalState & state, const FlakeRef & flakeRef, FlakeAlias al
return nonFlake;
}
/* Given a flake reference, recursively fetch it and its
dependencies.
FIXME: this should return a graph of flakes.
*/
ResolvedFlake resolveFlake(EvalState & state, const FlakeRef & topRef,
RegistryAccess registryAccess, bool isTopFlake)
LockFile entryToLockFile(const LockFile::FlakeEntry & entry)
{
LockFile lockFile;
lockFile.flakeEntries = entry.flakeEntries;
lockFile.nonFlakeEntries = entry.nonFlakeEntries;
return lockFile;
}
ResolvedFlake resolveFlakeFromLockFile(EvalState & state, const FlakeRef & flakeRef, RegistryAccess registryAccess,
LockFile lockFile, bool isTopFlake = false)
{
bool allowRegistries = registryAccess == AllowRegistry || (registryAccess == AllowRegistryAtTop && isTopFlake);
Flake flake = getFlake(state, topRef, allowRegistries);
LockFile lockFile;
if (isTopFlake)
lockFile = readLockFile(flake.storePath + flake.resolvedRef.subdir + "/flake.lock"); // FIXME: symlink attack
Flake flake = getFlake(state, flakeRef, allowRegistries);
ResolvedFlake deps(flake);
for (auto & nonFlakeInfo : flake.nonFlakeRequires)
deps.nonFlakeDeps.push_back(getNonFlake(state, nonFlakeInfo.second, nonFlakeInfo.first));
for (auto & nonFlakeInfo : flake.nonFlakeRequires) {
FlakeRef ref = nonFlakeInfo.second;
auto i = lockFile.nonFlakeEntries.find(nonFlakeInfo.first);
if (i != lockFile.nonFlakeEntries.end()) ref = i->second.ref;
deps.nonFlakeDeps.push_back(getNonFlake(state, ref, nonFlakeInfo.first));
}
for (auto newFlakeRef : flake.requires) {
FlakeRef ref = newFlakeRef;
LockFile newLockFile;
auto i = lockFile.flakeEntries.find(newFlakeRef);
if (i != lockFile.flakeEntries.end()) newFlakeRef = i->second.ref;
// FIXME: propagate lockFile downwards
deps.flakeDeps.push_back(resolveFlake(state, newFlakeRef, registryAccess, false));
if (i != lockFile.flakeEntries.end()) { // Propagate lockFile downwards if possible
ref = i->second.ref;
newLockFile = entryToLockFile(i->second);
}
deps.flakeDeps.push_back(resolveFlakeFromLockFile(state, ref, registryAccess, newLockFile));
}
return deps;
}
/* Given a flake reference, recursively fetch it and its dependencies.
FIXME: this should return a graph of flakes.
*/
ResolvedFlake resolveFlake(EvalState & state, const FlakeRef & topRef, RegistryAccess registryAccess,
bool recreateLockFile)
{
bool allowRegistries = registryAccess == AllowRegistry || registryAccess == AllowRegistryAtTop;
Flake flake = getFlake(state, topRef, allowRegistries);
LockFile lockFile;
if (!recreateLockFile) // If recreateLockFile, start with an empty lockfile
lockFile = readLockFile(flake.storePath + "/flake.lock"); // FIXME: symlink attack
return resolveFlakeFromLockFile(state, topRef, registryAccess, lockFile, true);
}
LockFile::FlakeEntry dependenciesToFlakeEntry(const ResolvedFlake & resolvedFlake)
{
LockFile::FlakeEntry entry(resolvedFlake.flake.resolvedRef, resolvedFlake.flake.hash);
@ -410,31 +432,25 @@ LockFile::FlakeEntry dependenciesToFlakeEntry(const ResolvedFlake & resolvedFlak
return entry;
}
static LockFile makeLockFile(EvalState & evalState, FlakeRef & flakeRef)
static LockFile makeLockFile(EvalState & evalState, FlakeRef & flakeRef, bool recreateLockFile)
{
ResolvedFlake resFlake = resolveFlake(evalState, flakeRef, AllowRegistry);
LockFile::FlakeEntry entry = dependenciesToFlakeEntry(resFlake);
LockFile lockFile;
lockFile.flakeEntries = entry.flakeEntries;
lockFile.nonFlakeEntries = entry.nonFlakeEntries;
return lockFile;
ResolvedFlake resFlake = resolveFlake(evalState, flakeRef, AllowRegistry, recreateLockFile);
return entryToLockFile(dependenciesToFlakeEntry(resFlake));
}
void updateLockFile(EvalState & state, const FlakeUri & flakeUri)
void updateLockFile(EvalState & state, const FlakeUri & uri, bool recreateLockFile)
{
// FIXME: We are writing the lockfile to the store here! Very bad practice!
FlakeRef flakeRef = FlakeRef(flakeUri);
FlakeRef flakeRef = FlakeRef(uri);
auto lockFile = makeLockFile(state, flakeRef, recreateLockFile);
if (auto refData = std::get_if<FlakeRef::IsPath>(&flakeRef.data)) {
auto lockFile = makeLockFile(state, flakeRef);
writeLockFile(lockFile, refData->path + "/" + flakeRef.subdir + "/flake.lock");
writeLockFile(lockFile, refData->path + (flakeRef.subdir == "" ? "" : "/" + flakeRef.subdir) + "/flake.lock");
// Hack: Make sure that flake.lock is visible to Git. Otherwise,
// exportGit will fail to copy it to the Nix store.
runProgram("git", true,
{ "-C", refData->path, "add", "--intent-to-add",
(flakeRef.subdir == "" ? "" : flakeRef.subdir + "/") + "flake.lock" });
runProgram("git", true, { "-C", refData->path, "add",
(flakeRef.subdir == "" ? "" : flakeRef.subdir + "/") + "flake.lock" });
} else
throw Error("flakeUri %s can't be updated because it is not a path", flakeUri);
throw Error("flakeUri %s can't be updated because it is not a path", uri);
}
void callFlake(EvalState & state, const ResolvedFlake & resFlake, Value & v)
@ -485,16 +501,17 @@ void callFlake(EvalState & state, const ResolvedFlake & resFlake, Value & v)
// Return the `provides` of the top flake, while assigning to `v` the provides
// of the dependencies as well.
void makeFlakeValue(EvalState & state, const FlakeRef & flakeRef, RegistryAccess registryAccess, Value & v)
void makeFlakeValue(EvalState & state, const FlakeRef & flakeRef, RegistryAccess registryAccess, Value & v, bool recreateLockFile)
{
callFlake(state, resolveFlake(state, flakeRef, registryAccess), v);
callFlake(state, resolveFlake(state, flakeRef, registryAccess, recreateLockFile), v);
}
// This function is exposed to be used in nix files.
static void prim_getFlake(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
makeFlakeValue(state, state.forceStringNoCtx(*args[0], pos),
evalSettings.pureEval ? DisallowRegistry : AllowRegistryAtTop, v);
evalSettings.pureEval ? DisallowRegistry : AllowRegistryAtTop, v, false);
// `recreateLockFile == false` because this is the evaluation stage, which should be pure, and hence not recreate lockfiles.
}
static RegisterPrimOp r2("getFlake", 1, prim_getFlake);

6
src/libexpr/primops/flake.hh
View file

@ -45,7 +45,7 @@ Path getUserRegistryPath();
enum RegistryAccess { DisallowRegistry, AllowRegistry, AllowRegistryAtTop };
void makeFlakeValue(EvalState & state, const FlakeRef & flakeRef, RegistryAccess registryAccess, Value & v);
void makeFlakeValue(EvalState & state, const FlakeRef & flakeRef, RegistryAccess registryAccess, Value & v, bool recreateLockFile);
std::shared_ptr<FlakeRegistry> readRegistry(const Path &);
@ -103,9 +103,9 @@ struct ResolvedFlake
ResolvedFlake(const Flake & flake) : flake(flake) {}
};
ResolvedFlake resolveFlake(EvalState &, const FlakeRef &, RegistryAccess registryAccess, bool isTopFlake = true);
ResolvedFlake resolveFlake(EvalState &, const FlakeRef &, RegistryAccess, bool recreateLockFile);
void updateLockFile(EvalState &, const FlakeUri &);
void updateLockFile(EvalState &, const FlakeUri &, bool recreateLockFile);
void gitCloneFlake (std::string flakeUri, EvalState &, Registries, Path);
}

4
src/nix/command.hh
View file

@ -76,10 +76,10 @@ struct SourceExprCommand : virtual Args, StoreCommand, MixEvalArgs
{
std::optional<Path> file;
bool updateLockFile = true;
SourceExprCommand();
bool recreateLockFile = false;
ref<EvalState> getEvalState();
std::vector<std::shared_ptr<Installable>> parseInstallables(

9
src/nix/flake.cc
View file

@ -114,7 +114,8 @@ struct CmdFlakeDeps : FlakeCommand, MixJSON, StoreCommand, MixEvalArgs
FlakeRef flakeRef(flakeUri);
ResolvedFlake resFlake = resolveFlake(*evalState, flakeRef, AllowRegistryAtTop);
bool recreateLockFile = false;
ResolvedFlake resFlake = resolveFlake(*evalState, flakeRef, AllowRegistryAtTop, recreateLockFile);
std::queue<ResolvedFlake> todo;
todo.push(resFlake);
@ -132,7 +133,7 @@ struct CmdFlakeDeps : FlakeCommand, MixJSON, StoreCommand, MixEvalArgs
}
};
struct CmdFlakeUpdate : StoreCommand, GitRepoCommand, MixEvalArgs
struct CmdFlakeUpdate : StoreCommand, FlakeCommand, MixEvalArgs
{
std::string name() override
{
@ -148,8 +149,8 @@ struct CmdFlakeUpdate : StoreCommand, GitRepoCommand, MixEvalArgs
{
auto evalState = std::make_shared<EvalState>(searchPath, store);
if (gitPath == "") gitPath = absPath(".");
updateLockFile(*evalState, gitPath);
bool recreateLockFile = true;
updateLockFile(*evalState, flakeUri, recreateLockFile);
}
};

16
src/nix/installables.cc
View file

@ -23,9 +23,9 @@ SourceExprCommand::SourceExprCommand()
.dest(&file);
mkFlag()
.longName("no-update")
.description("don't create/update flake lock files")
.set(&updateLockFile, false);
.longName("recreate-lock-file")
.description("recreate lock file from scratch")
.set(&recreateLockFile, true);
}
ref<EvalState> SourceExprCommand::getEvalState()
@ -157,13 +157,11 @@ struct InstallableFlake : InstallableValue
Value * toValue(EvalState & state) override
{
auto path = std::get_if<FlakeRef::IsPath>(&flakeRef.data);
if (cmd.updateLockFile && path) {
updateLockFile(state, path->path);
}
auto vFlake = state.allocValue();
makeFlakeValue(state, flakeRef, AllowRegistryAtTop, *vFlake);
if (std::get_if<FlakeRef::IsPath>(&flakeRef.data))
updateLockFile(state, flakeRef.to_string(), cmd.recreateLockFile);
makeFlakeValue(state, flakeRef, AllowRegistryAtTop, *vFlake, cmd.recreateLockFile);
auto vProvides = (*vFlake->attrs->get(state.symbols.create("provides")))->value;

39
tests/flakes.sh
View file

@ -9,11 +9,11 @@ clearStore
registry=$TEST_ROOT/registry.json
flake1=$TEST_ROOT/flake1
flake2=$TEST_ROOT/flake2
flake3=$TEST_ROOT/flake3
flake1Dir=$TEST_ROOT/flake1
flake2Dir=$TEST_ROOT/flake2
flake3Dir=$TEST_ROOT/flake3
for repo in $flake1 $flake2 $flake3; do
for repo in $flake1Dir $flake2Dir $flake3Dir; do
rm -rf $repo
mkdir $repo
git -C $repo init
@ -21,7 +21,7 @@ for repo in $flake1 $flake2 $flake3; do
git -C $repo config user.name "Foobar"
done
cat > $flake1/flake.nix <<EOF
cat > $flake1Dir/flake.nix <<EOF
{
name = "flake1";
@ -36,11 +36,11 @@ cat > $flake1/flake.nix <<EOF
}
EOF
cp ./simple.nix ./simple.builder.sh ./config.nix $flake1/
git -C $flake1 add flake.nix simple.nix simple.builder.sh config.nix
git -C $flake1 commit -m 'Initial'
cp ./simple.nix ./simple.builder.sh ./config.nix $flake1Dir/
git -C $flake1Dir add flake.nix simple.nix simple.builder.sh config.nix
git -C $flake1Dir commit -m 'Initial'
cat > $flake2/flake.nix <<EOF
cat > $flake2Dir/flake.nix <<EOF
{
name = "flake2";
@ -56,8 +56,8 @@ cat > $flake2/flake.nix <<EOF
}
EOF
git -C $flake2 add flake.nix
git -C $flake2 commit -m 'Initial'
git -C $flake2Dir add flake.nix
git -C $flake2Dir commit -m 'Initial'
cat > $flake3/flake.nix <<EOF
{
@ -82,13 +82,13 @@ cat > $registry <<EOF
{
"flakes": {
"flake1": {
"uri": "file://$flake1"
"uri": "file://$flake1Dir"
},
"flake2": {
"uri": "file://$flake2"
"uri": "file://$flake2Dir"
},
"flake3": {
"uri": "file://$flake3"
"uri": "file://$flake3Dir"
},
"nixpkgs": {
"uri": "flake1"
@ -121,13 +121,12 @@ nix build -o $TEST_ROOT/result --flake-registry $registry flake1:
(! nix build -o $TEST_ROOT/result --flake-registry $registry flake2:bar)
# But should succeed in impure mode.
# FIXME: this currently fails.
#nix build -o $TEST_ROOT/result --flake-registry $registry flake2:bar --impure
nix build -o $TEST_ROOT/result --flake-registry $registry flake2:bar --impure
# Test automatic lock file generation.
nix build -o $TEST_ROOT/result --flake-registry $registry $flake2:bar
[[ -e $flake2/flake.lock ]]
git -C $flake2 commit flake.lock -m 'Add flake.lock'
nix build -o $TEST_ROOT/result --flake-registry $registry $flake2Dir:bar
[[ -e $flake2Dir/flake.lock ]]
git -C $flake2Dir commit flake.lock -m 'Add flake.lock'
# Rerunning the build should not change the lockfile.
#nix build -o $TEST_ROOT/result --flake-registry $registry $flake2:bar
@ -137,7 +136,7 @@ git -C $flake2 commit flake.lock -m 'Add flake.lock'
nix build -o $TEST_ROOT/result --flake-registry $registry flake2:bar
# Or without a registry.
nix build -o $TEST_ROOT/result file://$flake2:bar
nix build -o $TEST_ROOT/result file://$flake2Dir:bar
# Test whether indirect dependencies work.
#nix build -o $TEST_ROOT/result --flake-registry $registry $flake3:xyzzy