nix/tests/ca/substitute.sh
regnat b66234134f Add a realisations disk cache
Similar to the nar-info disk cache (and using the same db).
This makes rebuilds muuch faster.

- This works regardless of the ca-derivations experimental feature.
  I could modify the logic to not touch the db if the flag isn’t there,
  but given that this is a trash-able local cache, it doesn’t seem to be
  really worth it.
- We could unify the `NARs` and `Realisation` tables to only have one
  generic kv table. This is left as an exercise to the reader.
- I didn’t update the cache db version number as the new schema just
  adds a new table to the previous one, so the db will be transparently
  migrated and is backwards-compatible.

Fix #4746
2021-05-06 17:38:20 +02:00

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#!/usr/bin/env bash
# Ensure that binary substitution works properly with ca derivations
source common.sh
sed -i 's/experimental-features .*/& ca-derivations ca-references/' "$NIX_CONF_DIR"/nix.conf
rm -rf $TEST_ROOT/binary_cache
export REMOTE_STORE_DIR=$TEST_ROOT/binary_cache
export REMOTE_STORE=file://$REMOTE_STORE_DIR
buildDrvs () {
nix build --file ./content-addressed.nix -L --no-link "$@"
}
# Populate the remote cache
clearStore
buildDrvs --post-build-hook ../push-to-store.sh
# Restart the build on an empty store, ensuring that we don't build
clearStore
buildDrvs --substitute --substituters $REMOTE_STORE --no-require-sigs -j0
# Same thing, but
# 1. With non-ca derivations
# 2. Erasing the realisations on the remote store
#
# Even in that case, realising the derivations should still produce the right
# realisations on the local store
#
# Regression test for #4725
clearStore
nix build --file ../simple.nix -L --no-link --post-build-hook ../push-to-store.sh
clearStore
rm -r "$REMOTE_STORE_DIR/realisations"
nix build --file ../simple.nix -L --no-link --substitute --substituters "$REMOTE_STORE" --no-require-sigs -j0
# There's no easy way to check whether a realisation is present on the local
# store short of manually querying the db, but the build environment doesn't
# have the sqlite binary so we instead push things again, and check that the
# realisations have correctly been pushed to the remote store
nix copy --to "$REMOTE_STORE" --file ../simple.nix
if [[ -z "$(ls "$REMOTE_STORE_DIR/realisations")" ]]; then
echo "Realisations not rebuilt"
exit 1
fi
# Test the local realisation disk cache
buildDrvs --post-build-hook ../push-to-store.sh
clearStore
# Add the realisations of rootCA to the cachecache
clearCacheCache
export _NIX_FORCE_HTTP=1
buildDrvs --substitute --substituters $REMOTE_STORE --no-require-sigs -j0
# Try rebuilding, but remove the realisations from the remote cache to force
# using the cachecache
clearStore
rm $REMOTE_STORE_DIR/realisations/*
buildDrvs --substitute --substituters $REMOTE_STORE --no-require-sigs -j0