nix-super/tests/init.sh
John Ericson 87da941348 Clean up daemon handling
Split `common.sh` into the vars and functions definitions vs starting
the daemon (and possibly other initialization logic). This way,
`init.sh` can just `source` the former. Trying to start the daemon
before `nix.conf` is written will fail because `nix daemon` requires
`--experimental-features 'nix-command'`.

`killDaemon` is idempotent, so it's safe to call when no daemon is
running.

`startDaemon` and `killDaemon` use the PID (which is now exported to
subshells) to decide whether there is work to be done, rather than
`NIX_REMOTE`, which might conceivably be set differently even if a
daemon is running.

`startDaemon` and `killDaemon` can save/restore the old `NIX_REMOTE` as
`NIX_REMOTE_OLD`.

`init.sh` kills daemon before deleting everything (including the daemon
socket).
2023-02-23 11:31:44 -05:00

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set -eu -o pipefail
# Don't start the daemon
source common/vars-and-functions.sh
test -n "$TEST_ROOT"
if test -d "$TEST_ROOT"; then
chmod -R u+w "$TEST_ROOT"
# We would delete any daemon socket, so let's stop the daemon first.
killDaemon
rm -rf "$TEST_ROOT"
fi
mkdir "$TEST_ROOT"
mkdir "$NIX_STORE_DIR"
mkdir "$NIX_LOCALSTATE_DIR"
mkdir -p "$NIX_LOG_DIR"/drvs
mkdir "$NIX_STATE_DIR"
mkdir "$NIX_CONF_DIR"
cat > "$NIX_CONF_DIR"/nix.conf <<EOF
build-users-group =
keep-derivations = false
sandbox = false
experimental-features = nix-command flakes
gc-reserved-space = 0
substituters =
flake-registry = $TEST_ROOT/registry.json
show-trace = true
include nix.conf.extra
trusted-users = $(whoami)
EOF
cat > "$NIX_CONF_DIR"/nix.conf.extra <<EOF
fsync-metadata = false
!include nix.conf.extra.not-there
EOF
# Initialise the database.
nix-store --init
# Did anything happen?
test -e "$NIX_STATE_DIR"/db/db.sqlite