#! /bin/sh

# Try whether the PostgreSQL in container accepts connections.
#
# With --live, be tolerant to starting PG server.  If the /bin/postgres binary
# has not been executed yet (the shell script is initializing the container),
# wait for it (this script might run forever, we expect that the timeout is
# maintained externally).

test -z "$ENABLED_COLLECTIONS" || . scl_source enable $ENABLED_COLLECTIONS

check=ready
case $1 in
    --live) check=live ;;
esac

while true; do
    # Wait until the /bin/postgres is executed.
    case $(readlink -f /proc/1/exe) in
        *bash) sleep 0.2; continue ;;
        *) break ;;
    esac
done

# Timeout is infinite (openshift template has the timeout pre-set)
pg_isready -q \
    -h 127.0.0.1 \
    ${POSTGRESQL_USER+-U "$POSTGRESQL_USER"} \
    ${POSTGRESQL_DATABASE+-d "$POSTGRESQL_DATABASE"} \
    --timeout 0
rc=$?

# we are ready only if the db accepts connections
test $rc -eq 0 && exit 0

# container is live also during pg cluster start-up
test $rc -eq 1 && test $check = live && exit 0

exit 1