flarum-docker/docker/docker-entrypoint.sh

#!/bin/bash
set -e

# Wait for MySQL/MariaDB
echo "Waiting for MySQL/MariaDB..."
MAX_RETRY=45
RETRY=1
while ! mysql --protocol TCP -h"$MYSQL_HOST" -u"$MYSQL_USER" -p"$MYSQL_PASSWORD" -e "show databases;" > /dev/null 2>&1; do
    sleep 1
    RETRY=`expr $RETRY + 1`
    if [ $RETRY -gt $MAX_RETRY ]; then
        >&2 echo "We have been waiting for MySQL too long already; failing."
        exit 1
    fi;
done

# Set up Flarum
if [[ -e '/flarum/app/public/assets/.installed.lock' ]]; then
    # If Flarum has already been installed, just create a config file
    echo "Creating config file..."
    cat << EOF > /flarum/app/config.php
<?php return array (
  'debug' => ${DEBUG:-false},
  'offline' => false,
  'database' => array (
    'driver' => 'mysql',
    'host' => '${MYSQL_HOST:-mysql}',
    'port' => '${MYSQL_PORT:-3306}',
    'database' => '${MYSQL_DATABASE:-flarum}',
    'username' => '${MYSQL_USER:-flarum}',
    'password' => '${MYSQL_PASSWORD:-flarum}',
    'charset' => 'utf8mb4',
    'collation' => 'utf8mb4_unicode_ci',
    'prefix' => '',
    'strict' => false,
  ),
  'url' => '${SITE_URL:-http://localhost}',
  'paths' => array (
    'api' => 'api',
    'admin' => 'admin',
  ),
);
EOF
else
    # Else build the config template and run the command line installer
    cd /flarum
    php make_config.php
    cd /flarum/app
    php flarum install -f /flarum/config.yaml
    rm -f /flarum/config.yaml
    touch /flarum/app/public/assets/.installed.lock
fi

# first arg is `-f` or `--some-option`
if [[ "${1#-}" != "$1" ]]; then
	set -- apache2-foreground "$@"
fi

exec "$@"