nexus-docker.sh

#!/bin/bash -e

NEXUS_VERSION="${1:-3.21.1}"
NEXUS_API_VERSION="${2:-v1}"
NEXUS_DOCKER_NAME="${3:-nexus}"
NEXUS_DOCKER_PORT="${4:-9999}"
NEXUS_PW_ON_DISK="${5:-/tmp/nexus-tst-pass}"
NEXUS_HTTP_CONNECTOR_DOCKER_REGISTRY="${6:-8888}"
NEXUS_HTTP_CONNECTOR_DOCKER_REGISTRY_INTERNAL="${7:-8082}"

validate() {
  if [ -z "${NEXUS_VERSION}" ] || [ -z "${NEXUS_API_VERSION}" ]; then
    echo "NEXUS_VERSION and NEXUS_API_VERSION should be specified."
    exit 1
  fi
}

nexus() {
  docker run --rm -d -p ${NEXUS_DOCKER_PORT}:8081 -p ${NEXUS_HTTP_CONNECTOR_DOCKER_REGISTRY}:${NEXUS_HTTP_CONNECTOR_DOCKER_REGISTRY_INTERNAL} --name ${NEXUS_DOCKER_NAME} "sonatype/nexus3:${NEXUS_VERSION}"
}

readiness() {
  until docker logs ${NEXUS_DOCKER_NAME} | grep -q 'Started Sonatype Nexus OSS'; do
    sleep 10
  done
}

# Since nexus 3.17.0 the default 'admin123' was changed by an autogenerated
# one. This function retrieves the autogenerated password and if this file
# is unavailable, the default 'admin123' is returned.
password() {
  mkdir -p "${NEXUS_PW_ON_DISK}"
  pw=$(docker exec -i ${NEXUS_DOCKER_NAME} cat /nexus-data/admin.password || true)
  if [[ "${pw}" =~ [0-9a-z-]{36} ]]; then
    echo "admin.password file found"  
  else
    echo "no admin.password file found. Setting password to old default admin pass..."
    pw=admin123
  fi
  export PASSWORD=$pw
  echo "${pw}" >${NEXUS_PW_ON_DISK}/${NEXUS_DOCKER_NAME}.txt
}

cleanup() {
  docker stop ${NEXUS_DOCKER_NAME}
}

main() {
  validate
  nexus
  readiness
  password
}

main