1 #!/usr/bin/env bash

     2 

     3 set -Eeuo pipefail

     4 

     5 # from https://stackoverflow.com/a/45977232

     6 # Following regex is based on https://www.rfc-editor.org/rfc/rfc3986#appendix-B with

     7 # additional sub-expressions to split authority into userinfo, host and port

     8 #

     9 readonly URI_REGEX='^(([^:/?#]+):)?(//((([^/?#]+)@)?([^:/?#]+)(:([0-9]+))?))?(/([^?#]*))(\?([^#]*))?(#(.*))?'

    10 #                    ↑↑            ↑  ↑↑↑            ↑         ↑ ↑            ↑ ↑        ↑  ↑        ↑ ↑

    11 #                    |2 scheme     |  ||6 userinfo   7 host    | 9 port       | 11 rpath |  13 query | 15 fragment

    12 #                    1 scheme:     |  |5 userinfo@             8 :…           10 path    12 ?…       14 #…

    13 #                                  |  4 authority

    14 #                                  3 //…

    15 

    16 parse_host () {

    17     [[ "$@" =~ $URI_REGEX ]] && echo "${BASH_REMATCH[7]}"

    18 }

    19 

    20 parse_port () {

    21     [[ "$@" =~ $URI_REGEX ]] && echo "${BASH_REMATCH[9]}"

    22 }

    23 

    24 dbhost=$(parse_host "${DATABASE_URL}")

    25 dbport=$(parse_port "${DATABASE_URL}")

    26 

    27 cd ${BASEDIR}

    28 

    29 if [[ "$*" =~ 'uwsgi' ]]; then

    30     echo "Waiting for postgres on ${dbhost}:${dbport}..."

    31 

    32     while ! nc -z ${dbhost} ${dbport}; do

    33         sleep 0.1

    34     done

    35 

    36     echo "PostgreSQL started"

    37     

    38     python manage.py syncdb --migrate

    39     python manage.py collectstatic --noinput --clear

    40 

    41 fi

    42 

    43 exec "$@"