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Do not attempt to write a lock file in builtins.getFlake

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Fixes https://github.com/NixOS/nix/issues/6541
This commit is contained in:
Naïm Favier 2022-05-18 11:33:04 +02:00
parent 7062ebf5be
commit 169384abb2
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2 changed files with 2 additions and 0 deletions
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1
src/libexpr/flake/flake.cc
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@ -723,6 +723,7 @@ static void prim_getFlake(EvalState & state, const PosIdx pos, Value * * args, V
lockFlake(state, flakeRef,
LockFlags {
.updateLockFile = false,
.writeLockFile = false,
.useRegistries = !evalSettings.pureEval && fetchSettings.useRegistries,
.allowMutable = !evalSettings.pureEval,
}),

1
tests/flakes.sh
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@ -163,6 +163,7 @@ nix build -o $TEST_ROOT/result --expr "(builtins.getFlake \"git+file://$flake1Di
# But should succeed in impure mode.
(! nix build -o $TEST_ROOT/result flake2#bar --impure)
nix build -o $TEST_ROOT/result flake2#bar --impure --no-write-lock-file
nix eval --expr "builtins.getFlake \"$flake2Dir\"" --impure
# Building a local flake with an unlocked dependency should fail with --no-update-lock-file.
nix build -o $TEST_ROOT/result $flake2Dir#bar --no-update-lock-file 2>&1 | grep 'requires lock file changes'