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Make non-flake inputs lazy

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Also add a proper test for non-flake inputs.
This commit is contained in:
Eelco Dolstra 2019-06-04 20:56:13 +02:00
parent 1c5067b9a7
commit 1e53a07712
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GPG key ID: 8170B4726D7198DE
4 changed files with 53 additions and 19 deletions
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44
src/libexpr/primops/flake.cc
View file

@ -276,7 +276,7 @@ Flake getFlake(EvalState & state, const FlakeRef & flakeRef, bool impureIsAllowe
}
// Get the `NonFlake` corresponding to a `FlakeRef`.
NonFlake getNonFlake(EvalState & state, const FlakeRef & flakeRef, FlakeAlias alias, bool impureIsAllowed = false)
NonFlake getNonFlake(EvalState & state, const FlakeRef & flakeRef, bool impureIsAllowed = false)
{
auto sourceInfo = fetchFlake(state, flakeRef, impureIsAllowed);
debug("got non-flake source '%s' with flakeref %s", sourceInfo.storePath, sourceInfo.resolvedRef.to_string());
@ -290,8 +290,6 @@ NonFlake getNonFlake(EvalState & state, const FlakeRef & flakeRef, FlakeAlias al
if (state.allowedPaths)
state.allowedPaths->insert(nonFlake.sourceInfo.storePath);
nonFlake.alias = alias;
return nonFlake;
}
@ -339,7 +337,7 @@ static std::pair<Flake, FlakeInput> updateLocks(
} else {
if (handleLockFile == AllPure || handleLockFile == TopRefUsesRegistries)
throw Error("cannot update non-flake dependency '%s' in pure mode", id);
auto nonFlake = getNonFlake(state, ref, id, allowedToUseRegistries(handleLockFile, false));
auto nonFlake = getNonFlake(state, ref, allowedToUseRegistries(handleLockFile, false));
newEntry.nonFlakeInputs.insert_or_assign(id,
NonFlakeInput(
nonFlake.sourceInfo.resolvedRef,
@ -441,6 +439,25 @@ static void prim_callFlake(EvalState & state, const Pos & pos, Value * * args, V
callFlake(state, flake, *lazyFlake, v);
}
static void prim_callNonFlake(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
auto lazyNonFlake = (NonFlakeInput *) args[0]->attrs;
auto nonFlake = getNonFlake(state, lazyNonFlake->ref);
if (nonFlake.sourceInfo.narHash != lazyNonFlake->narHash)
throw Error("the content hash of repository '%s' doesn't match the hash recorded in the referring lockfile", nonFlake.sourceInfo.resolvedRef);
state.mkAttrs(v, 8);
assert(state.store->isValidPath(nonFlake.sourceInfo.storePath));
mkString(*state.allocAttr(v, state.sOutPath),
nonFlake.sourceInfo.storePath, {nonFlake.sourceInfo.storePath});
emitSourceInfoAttrs(state, nonFlake.sourceInfo, v);
}
void callFlake(EvalState & state,
const Flake & flake,
const FlakeInputs & inputs,
@ -468,16 +485,15 @@ void callFlake(EvalState & state,
for (auto & dep : inputs.nonFlakeInputs) {
auto vNonFlake = state.allocAttr(v, dep.first);
state.mkAttrs(*vNonFlake, 8);
auto nonFlake = getNonFlake(state, dep.second.ref, dep.first);
assert(state.store->isValidPath(nonFlake.sourceInfo.storePath));
mkString(*state.allocAttr(*vNonFlake, state.sOutPath),
nonFlake.sourceInfo.storePath, {nonFlake.sourceInfo.storePath});
emitSourceInfoAttrs(state, nonFlake.sourceInfo, *vNonFlake);
auto vPrimOp = state.allocValue();
static auto primOp = new PrimOp(prim_callNonFlake, 1, state.symbols.create("callNonFlake"));
vPrimOp->type = tPrimOp;
vPrimOp->primOp = primOp;
auto vArg = state.allocValue();
vArg->type = tNull;
// FIXME: leak
vArg->attrs = (Bindings *) new NonFlakeInput(dep.second); // evil! also inefficient
mkApp(*vNonFlake, *vPrimOp, *vArg);
}
mkString(*state.allocAttr(v, state.sDescription), flake.description);

1
src/libexpr/primops/flake.hh
View file

@ -75,7 +75,6 @@ struct Flake
struct NonFlake
{
FlakeAlias alias;
FlakeRef originalRef;
SourceInfo sourceInfo;
NonFlake(const FlakeRef & origRef, const SourceInfo & sourceInfo)

2
src/nix/flake.cc
View file

@ -122,6 +122,7 @@ static nlohmann::json flakeToJson(const Flake & flake)
return j;
}
#if 0
static void printNonFlakeInfo(const NonFlake & nonFlake)
{
std::cout << fmt("ID: %s\n", nonFlake.alias);
@ -136,7 +137,6 @@ static nlohmann::json nonFlakeToJson(const NonFlake & nonFlake)
return j;
}
#if 0
// FIXME: merge info CmdFlakeInfo?
struct CmdFlakeDeps : FlakeCommand
{

25
tests/flakes.sh
View file

@ -83,7 +83,7 @@ git -C $flake3Dir add flake.nix
git -C $flake3Dir commit -m 'Initial'
cat > $nonFlakeDir/README.md <<EOF
Not much
FNORD
EOF
git -C $nonFlakeDir add README.md
@ -235,23 +235,42 @@ cat > $flake3Dir/flake.nix <<EOF
outputs = inputs: rec {
packages.xyzzy = inputs.flake2.outputs.packages.bar;
packages.sth = inputs.flake1.outputs.packages.foo;
packages.fnord =
with import ./config.nix;
mkDerivation {
inherit system;
name = "fnord";
buildCommand = ''
cat \${inputs.nonFlake}/README.md > \$out
'';
};
};
}
EOF
git -C $flake3Dir add flake.nix
cp ./config.nix $flake3Dir
git -C $flake3Dir add flake.nix config.nix
git -C $flake3Dir commit -m 'Add nonFlakeInputs'
# Check whether `nix build` works with a lockfile which is missing a nonFlakeInputs
# Check whether `nix build` works with a lockfile which is missing a
# nonFlakeInputs.
nix build -o $TEST_ROOT/result --flake-registry $registry $flake3Dir:sth
git -C $flake3Dir commit -m 'Update nonFlakeInputs'
nix build -o $TEST_ROOT/result --flake-registry $registry flake3:fnord
[[ $(cat $TEST_ROOT/result) = FNORD ]]
# Check whether flake input fetching is lazy: flake3:sth does not
# depend on flake2, so this shouldn't fail.
rm -rf $TEST_HOME/.cache
clearStore
mv $flake2Dir $flake2Dir.tmp
mv $nonFlakeDir $nonFlakeDir.tmp
nix build -o $TEST_ROOT/result --flake-registry $registry flake3:sth
(! nix build -o $TEST_ROOT/result --flake-registry $registry flake3:xyzzy)
(! nix build -o $TEST_ROOT/result --flake-registry $registry flake3:fnord)
mv $flake2Dir.tmp $flake2Dir
mv $nonFlakeDir.tmp $nonFlakeDir
nix build -o $TEST_ROOT/result --flake-registry $registry flake3:xyzzy flake3:fnord