Changelog

[0.1.2] - 2026-06-12

Fixed

• A relative :pgdata path (e.g. the default priv/db/data) broke startup since 0.1.1: it was passed verbatim as unix_socket_directories, which Postgres resolves against its own working directory — failing with could not create lock file and surfacing as :postgres_start_timeout. :pgdata is now expanded to an absolute path on init.

[0.1.1] - 2026-06-12

Changed

• Repository moved to https://github.com/saschabrink/pg_spawner.
• CI tests against Elixir 1.19 and 1.20 via the Nix flake dev shells.
• README badges for Hex version, docs, CI status, and license.

Fixed

• Postgres now starts with unix_socket_directories pinned to the pgdata directory. Linux builds that default the socket to /run/postgresql (e.g. nixpkgs) previously died on startup when that directory wasn't writable — surfacing as :postgres_start_timeout.

[0.1.0] - 2026-05-12

Added

• PgSpawner GenServer — starts Postgres as a BEAM-owned child via Port.open/2, with a shell watchdog that guarantees cleanup on SIGKILL.
• Guest mode: joins an already-running Postgres without owning the lifecycle.
• :log_file option — Postgres output goes to <pgdata>/postgres.log by default instead of the BEAM console. Pass :stdio to restore console output, nil to discard.
• OTP Application auto-start — adding :pg_spawner to deps is sufficient to start Postgres on app boot. Defaults: port: 15432, pgdata: "priv/db/data". Override via config :pg_spawner, .... Set pgdata: false to disable.
• Auto-initdb: PgSpawner bootstraps pgdata on first run if no PG_VERSION is present. No shellHook ceremony required.