SocialPub/tools/pasture/peers/shared.sh

# Services several peers share: one Postgres (each peer gets its own database) and one Redis (each its own db number).
shared_postgres_up() {
	podman container exists pasture-postgres && return 0
	podman run -d --replace --name pasture-postgres --network $net --network-alias postgres \
		-e POSTGRES_USER=pasture -e POSTGRES_PASSWORD=pasture -e POSTGRES_DB=pasture docker.io/library/postgres:17-alpine >/dev/null
	for _ in $(seq 1 60); do podman exec pasture-postgres pg_isready -U pasture >/dev/null 2>&1 && return 0; sleep 1; done
	echo "postgres did not start" >&2; return 1
}

shared_redis_up() {
	podman container exists pasture-redis && return 0
	podman run -d --replace --name pasture-redis --network $net --network-alias redis docker.io/library/redis:7-alpine >/dev/null
}

# pg_db <name> [extension...]: a database of the shared Postgres for one peer, with the extensions it needs
pg_db() {
	local name=$1; shift
	podman exec pasture-postgres sh -c "psql -U pasture -tc \"select 1 from pg_database where datname='$name'\" | grep -q 1 || createdb -U pasture $name"
	for ext in "$@"; do
		podman exec pasture-postgres psql -U pasture -d "$name" -qc "create extension if not exists \"$ext\";" >/dev/null
	done
}