pre-build

#!/usr/bin/env bash
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
source "$PLUGIN_ENABLED_PATH/common/functions"
BUILDER_TYPE="$1" APP="$2"
if [[ "$BUILDER_TYPE" != "herokuish" ]]; then
  exit 0
fi
IMAGE=$(get_app_image_name $APP)

APP_SPECIFIC_KEY_FOLDER="$DOKKU_ROOT/.hostkeys/$APP/.ssh"
SHARED_KEY_FOLDER="$DOKKU_ROOT/.hostkeys/shared/.ssh"
bash $( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )/install
[[ ! -f "$APP_SPECIFIC_KEY_FOLDER/known_hosts" ]] && [[ ! -f "$SHARED_KEY_FOLDER/known_hosts" ]] && return

dokku_log_info1 "Adding host-keys to build environment ..."

KNOWN_HOSTS_COMBINED=""

if [[ -f "$APP_SPECIFIC_KEY_FOLDER/known_hosts" ]]; then
  KNOWN_HOSTS_COMBINED=$(cat "$APP_SPECIFIC_KEY_FOLDER/known_hosts")
  dokku_log_verbose_quiet "Adding app specific keys"
fi

if [[ -f "$SHARED_KEY_FOLDER/known_hosts" ]]; then
  dokku_log_verbose_quiet "Adding shared keys"
  if ([[ -z "$KNOWN_HOSTS_COMBINED" ]]); then
    KNOWN_HOSTS_COMBINED="$KNOWN_HOSTS_COMBINED"$(cat "$SHARED_KEY_FOLDER/known_hosts")
  else
    KNOWN_HOSTS_COMBINED="$KNOWN_HOSTS_COMBINED"$'\n'$(cat "$SHARED_KEY_FOLDER/known_hosts")
  fi
fi

if [[ ! -z "$KNOWN_HOSTS_COMBINED" ]]; then
  # 1. Create the .ssh folder
  id=$(docker run $DOKKU_GLOBAL_RUN_ARGS -d $IMAGE /bin/bash -c "mkdir -p -m 700 /app/.ssh")
  test $(docker wait $id) -eq 0
  docker commit $id $IMAGE > /dev/null

  # 2. Transfer the keyfile to the container
  idWithKeys=$(echo -e "$KNOWN_HOSTS_COMBINED" | docker run $DOKKU_GLOBAL_RUN_ARGS -i -a stdin $IMAGE /bin/bash -c "cat >> /etc/ssh/ssh_known_hosts && chmod 644 /etc/ssh/ssh_known_hosts")
  test $(docker wait $idWithKeys) -eq 0
  docker commit $idWithKeys $IMAGE > /dev/null

  idWithConfig=$(echo "UserKnownHostsFile /etc/ssh/ssh_known_hosts" | docker run $DOKKU_GLOBAL_RUN_ARGS -i -a stdin $IMAGE /bin/bash -c "cat >> /etc/ssh/ssh_config" )
  test $(docker wait $idWithConfig) -eq 0
  docker commit $idWithConfig $IMAGE > /dev/null
fi