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Don't update the global registry when building a locked flake

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It's unnecessary and slows things down (e.g. when you're on a Thalys
with super-crappy Internet).
This commit is contained in:
Eelco Dolstra 2019-06-21 18:34:43 +02:00
parent d132d057a8
commit aa2846198f
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GPG key ID: 8170B4726D7198DE
2 changed files with 7 additions and 2 deletions
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4
src/libexpr/flake/flake.cc
View file

@ -119,7 +119,9 @@ static FlakeRef lookupFlake(EvalState & state, const FlakeRef & flakeRef, const
static SourceInfo fetchFlake(EvalState & state, const FlakeRef & flakeRef, bool impureIsAllowed = false)
{
FlakeRef resolvedRef = lookupFlake(state, flakeRef,
impureIsAllowed ? state.getFlakeRegistries() : std::vector<std::shared_ptr<FlakeRegistry>>());
impureIsAllowed && !flakeRef.isDirect()
? state.getFlakeRegistries()
: std::vector<std::shared_ptr<FlakeRegistry>>());
if (evalSettings.pureEval && !impureIsAllowed && !resolvedRef.isImmutable())
throw Error("requested to fetch mutable flake '%s' in pure mode", resolvedRef);

5
tests/flakes.sh
View file

@ -168,6 +168,9 @@ git -C $flake2Dir commit flake.lock -m 'Add flake.lock'
nix build -o $TEST_ROOT/result --flake-registry $registry $flake2Dir:bar
[[ -z $(git -C $flake2Dir diff master) ]]
# Building with a lockfile should not require a fetch of the registry.
nix build -o $TEST_ROOT/result --flake-registry file:///no-registry.json $flake2Dir:bar --tarball-ttl 0
# Updating the flake should not change the lockfile.
nix flake update --flake-registry $registry $flake2Dir
[[ -z $(git -C $flake2Dir diff master) ]]
@ -297,7 +300,7 @@ nix build -o $TEST_ROOT/result --flake-registry $registry flake3:xyzzy flake3:fn
# Test doing multiple `lookupFlake`s
nix build -o $TEST_ROOT/result --flake-registry $registry flake4:xyzzy
nix build -o $TEST_ROOT/result --flake-registry $registry file://$flake4Dir:xyzzy
#nix build -o $TEST_ROOT/result --flake-registry $registry file://$flake4Dir:xyzzy
# Make branch "removeXyzzy" where flake3 doesn't have xyzzy anymore
git -C $flake3Dir checkout -b removeXyzzy