Init for gitlab-ci-multi-runner (docker)

init

#!/bin/bash

# gitlab-ci-multi-runner data directory
DATA_DIR="/data"
CONFIG_FILE=${CONFIG_FILE:-$DATA_DIR/config.toml}
# custom certificate authority path
CA_CERTIFICATES_PATH=${CA_CERTIFICATES_PATH:-$DATA_DIR/certs/ca.crt}
LOCAL_CA_PATH="/usr/local/share/ca-certificates/ca.crt"

update_ca () {
  echo "Updating CA certificates..."
  cp "${CA_CERTIFICATES_PATH}" "${LOCAL_CA_PATH}"
  update-ca-certificates --fresh >/dev/null
}

if [ -f "${CA_CERTIFICATES_PATH}" ]; then
  # update the ca if the custom ca is different than the current
  cmp --silent "${CA_CERTIFICATES_PATH}" "${LOCAL_CA_PATH}" \
  || update_ca
fi

if [ ! -f "${CONFIG_FILE}" ]; then
  # create config file if it does not exist
  mkdir -p $(dirname "${CONFIG_FILE}") && touch "${CONFIG_FILE}"
fi

# launch gitlab-ci-multi-runner passing all arguments
exec gitlab-ci-multi-runner "$@"