nginx-pre-reload

#!/usr/bin/env bash
set -eo pipefail
[[ $DOKKU_TRACE ]] && set -x

source "$PLUGIN_AVAILABLE_PATH/common/functions"
source "$PLUGIN_AVAILABLE_PATH/certs/functions"
source "$PLUGIN_AVAILABLE_PATH/config/functions"
source "$PLUGIN_AVAILABLE_PATH/nginx-vhosts/functions"

# shellcheck disable=SC2155
redirect_nginx_pre_load_trigger() {
  # shellcheck disable=SC2034
  declare desc="add nginx redirect servers"
  # shellcheck disable=SC2034
  local trigger="redirect_nginx_pre_load_trigger"

  local APP="$1"
  local APP_ROOT="$DOKKU_ROOT/$APP"
  local REDIRECT_FILE="$APP_ROOT/REDIRECTS"
  [[ ! -s "$REDIRECT_FILE" ]] && exit 0

  if [[ "$(plugn trigger proxy-type "$APP")" != "nginx" ]]; then
    return
  fi

  local NGINX_CONF="$APP_ROOT/nginx.conf"
  local NGINX_TEMPLATE="$(dirname "$0")/templates/nginx.conf.sigil"
  local PROXY_PORT_MAP=$(config_get "$APP" DOKKU_PROXY_PORT_MAP || true)
  if [[ -z "$PROXY_PORT_MAP" ]]; then
    PROXY_PORT_MAP="$(plugn trigger ports-get "$APP" | xargs)"
  fi
  PROXY_PORT_MAP="$(echo -e "${PROXY_PORT_MAP}" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
  local NGINX_LOCATION=$(get_nginx_location)
  if [[ -z "$NGINX_LOCATION" ]]; then
    exit 1
  fi

  local NGINX_VERSION="$($NGINX_LOCATION -v 2>&1 | cut -d'/' -f 2 || true)"
  if is_ssl_enabled "$APP"; then
    local APP_SSL_PATH="$DOKKU_ROOT/$APP/tls"
  fi

  local NGINX_CONF_PREPEND=$(mktemp)
  # shellcheck disable=SC2064
  trap "rm -f \"$NGINX_CONF_PREPEND\"" EXIT

  while read -r line; do
    [[ -z "$line" ]] && continue
    local DOMAIN=$(echo "$line" | awk -F ':' '{ print $1 }')
    local DEST_DOMAIN=$(echo "$line" | awk -F ':' '{ print $2 }')
    local REDIR_CODE=$(echo "$line" | awk -F ':' '{ print $3 ? $3 : "301" }')
    dokku_log_info1 "Configuring redirect for $DOMAIN to $DEST_DOMAIN via HTTP $REDIR_CODE..."

    # shellcheck disable=SC2191
    local SIGIL_PARAMS=(-f $NGINX_TEMPLATE APP="$APP" DOKKU_ROOT="$DOKKU_ROOT"
      APP_SSL_PATH="$APP_SSL_PATH"
      DOMAIN="$DOMAIN" DEST_DOMAIN="$DEST_DOMAIN" REDIR_CODE="$REDIR_CODE"
      PROXY_PORT_MAP="$PROXY_PORT_MAP")
    sigil "${SIGIL_PARAMS[@]}" | cat -s >>"$NGINX_CONF_PREPEND"
  done <<<"$(<"$REDIRECT_FILE")"

  if [[ -s "$NGINX_CONF_PREPEND" ]]; then
    cat "$NGINX_CONF" >>"$NGINX_CONF_PREPEND"
    cat "$NGINX_CONF_PREPEND" >"$NGINX_CONF"
  fi
}

redirect_nginx_pre_load_trigger "$@"