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getFlake: In pure mode, check that the argument is an immutable flakeref

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This commit is contained in:
Eelco Dolstra 2020-04-03 13:07:05 +02:00
parent bb39f2bb8a
commit 9c78f7f196
2 changed files with 13 additions and 1 deletions
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7
src/libexpr/flake/flake.cc
View File

@ -628,8 +628,13 @@ void callFlake(EvalState & state,
static void prim_getFlake(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
auto flakeRefS = state.forceStringNoCtx(*args[0], pos);
auto flakeRef = parseFlakeRef(flakeRefS);
if (evalSettings.pureEval && !flakeRef.input->isImmutable())
throw Error("cannot call 'getFlake' on mutable flake reference '%s', at %s (use --impure to override)", flakeRefS, pos);
callFlake(state,
lockFlake(state, parseFlakeRef(state.forceStringNoCtx(*args[0], pos)),
lockFlake(state, flakeRef,
LockFlags {
.updateLockFile = false,
.useRegistries = !evalSettings.pureEval,

7
tests/flakes.sh
View File

@ -194,6 +194,13 @@ nix build -o $TEST_ROOT/result git+file://$flake1Dir
nix build -o $flake1Dir/result git+file://$flake1Dir
nix path-info $flake1Dir/result
# 'getFlake' on a mutable flakeref should fail in pure mode, but succeed in impure mode.
(! nix build -o $TEST_ROOT/result --expr "(builtins.getFlake \"$flake1Dir\").defaultPackage.$system")
nix build -o $TEST_ROOT/result --expr "(builtins.getFlake \"$flake1Dir\").defaultPackage.$system" --impure
# 'getFlake' on an immutable flakeref should succeed even in pure mode.
nix build -o $TEST_ROOT/result --expr "(builtins.getFlake \"git+file://$flake1Dir?rev=$hash2\").defaultPackage.$system"
# Building a flake with an unlocked dependency should fail in pure mode.
(! nix build -o $TEST_ROOT/result flake2#bar --no-registries)
(! nix eval --expr "builtins.getFlake \"$flake2Dir\"")