nginx-pre-reload

#!/usr/bin/env bash
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
APP="$1";

# do not even attempt to read ENV if it does not exist
if [ ! -f "$DOKKU_ROOT/$APP/ENV" ]; then
    exit 0;
fi

# read app environment variable with in-container path to custom configuration file
set +eo pipefail;
$(cat $DOKKU_ROOT/$APP/ENV | grep 'NGINX_VHOSTS_CUSTOM_CONFIGURATION=')
set -eo pipefail;

# this plugin will only work if NGINX_VHOSTS_CUSTOM_CONFIGURATION environment variable is set
if [ "$NGINX_VHOSTS_CUSTOM_CONFIGURATION" == "" ]; then
    exit 0;
fi

# make sure that app-specific nginx.conf include directory exists
if [ ! -d "$DOKKU_ROOT/$APP/nginx.conf.d/" ]; then
    mkdir "$DOKKU_ROOT/$APP/nginx.conf.d/"
fi

# import custom configuration to dokku host (allow failure since this script is also run on the config:set before the actual file is pushed)
set +eo pipefail;
id=$(docker run -d -e PORT=$(cat $DOKKU_ROOT/$APP/PORT) -e APP=$APP dokku/$APP /bin/bash -c "cat /app/$NGINX_VHOSTS_CUSTOM_CONFIGURATION")
test $(docker wait $id) -eq 0
docker logs $id > $DOKKU_ROOT/$APP/nginx.conf.d/nginx-vhosts-custom-configuration.conf
docker rm -f $id
set -eo pipefail;