[Unit]
Description=PostgreSQL Database Server - Initialization
Documentation=https://hub.docker.com/_/postgres/
After=network.target postgresql-set-major.service
Before=postgresql-server.service
Requires=postgresql-set-major.service

# Only start if PostgreSQL has been configured
ConditionPathExists=/etc/quadlets/postgresql/config.env
# and NOT initialized
ConditionPathExists=!/var/lib/quadlets/postgresql/.initialized

# Start/stop this unit when the target is started/stopped
PartOf=postgresql.target

[Container]
ContainerName=postgresql-init-job
Image=docker.io/library/postgres:${PG_MAJOR}-alpine

# Network configuration
Network=host

# PostgreSQL storage is specific to major version
Environment=PGDATA=/var/lib/postgresql/${PG_MAJOR}/docker

# Those environment variables will be injected by podman into the container
EnvironmentFile=/etc/quadlets/postgresql/config.env

# Use the official entrypoint script to initialize the database
Entrypoint=/usr/local/bin/docker-ensure-initdb.sh
# Entrypoint=/bin/sleep
# Exec=INF

# Volume mounts
Volume=/var/lib/quadlets/postgresql:/var/lib/postgresql:z

[Service]
Restart=no
TimeoutStartSec=30

# These environment variables are sourced to be used by systemd in the Exec* commands
EnvironmentFile=/etc/quadlets/postgresql/config.env

# This container is a job - run once to completion
Type=oneshot

# Mark the database as intialized
ExecStartPost=touch /var/lib/quadlets/postgresql/.initialized

[Install]
WantedBy=postgresql.target