simple temp postgres database

pg_tmp.sh

#!/usr/bin/env bash

# A simple wrapper around pg_ctl that automatically initializes and creates a database on start.
# export PGHOST=$(mktemp -d)
# pg_tmp start
# psql -c "SELECT 'Have fun!';"
# pg_tmp stop
# rm -r $PGHOST # Be careful!

set -eo pipefail

PGDATA="$(realpath --canonicalize-missing "$PGHOST")"
export PGDATA

case "$1" in
    start|restart)
        mkdir -p "$PGDATA"
        [ -f "$PGDATA/PG_VERSION" ] || \
            initdb --auth-local=peer --auth-host=reject >/dev/null
        pg_ctl --log="$PGDATA/postgres.log" --wait \
            -o "-c listen_addresses= -c unix_socket_directories=$PGDATA" "$@"
        psql --command= 2>/dev/null || createdb
        ;;
    *)
        pg_ctl "$@"
        ;;
esac