How to change admin password of Nexus 3 via API

README.md

source change_admin_password.sh
change_admin_password http://localhost:8081 admin123 hogehoge
change_admin_password https://localhost:8443 admin123 hogehoge -k

change_admin_password.sh

#!/bin/bash

function change_admin_password() {
  local NEXUS_URL=$1
  local NEXUS_OLD_PWD=$2
  local NEXUS_NEW_PWD=$3
  shift 3
  local CURL_OPTS="$@"
  local SCRIPT_NAME=change_admin_password

  read -r -d '' SCRIPT_JSON << EOF
{
  "name": "${SCRIPT_NAME}",
  "type": "groovy",
  "content": "security.securitySystem.changePassword('admin', args)"
}
EOF

  CHECK_SCRIPT_STATUS=`curl ${CURL_OPTS} -s -o /dev/null -I -w "%{http_code}" -u "admin:${NEXUS_OLD_PWD}" "${NEXUS_URL}/service/siesta/rest/v1/script/${SCRIPT_NAME}"`

  if [ "${CHECK_SCRIPT_STATUS}" == "404" ];then
    echo "> ${SCRIPT_NAME} is not found (${CHECK_SCRIPT_STATUS})"
    echo "> creating script (${SCRIPT_NAME}) ..."
    curl ${CURL_OPTS} -H "Accept: application/json" -H "Content-Type: application/json" -d "${SCRIPT_JSON}" -u "admin:${NEXUS_OLD_PWD}" "${NEXUS_URL}/service/siesta/rest/v1/script/"
  elif [ "${CHECK_SCRIPT_STATUS}" == "401" ];then
    echo "> Unauthorized (${CHECK_SCRIPT_STATUS})"
    return
  else
    echo "> ${SCRIPT_NAME} is found (${CHECK_SCRIPT_STATUS})"
    echo "> updating script (${SCRIPT_NAME}) ..."
    curl ${CURL_OPTS} -XPUT -H "Accept: application/json" -H "Content-Type: application/json" -d "${SCRIPT_JSON}" -u "admin:${NEXUS_OLD_PWD}" "${NEXUS_URL}/service/siesta/rest/v1/script/${SCRIPT_NAME}"
  fi

  echo "> updating password ..."
  CHECK_RUN_STATUS=`curl ${CURL_OPTS} -s -o /dev/null -w "%{http_code}" -H "Content-Type: text/plain" -u "admin:${NEXUS_OLD_PWD}" "${NEXUS_URL}/service/siesta/rest/v1/script/${SCRIPT_NAME}/run" -d "${NEXUS_NEW_PWD}"`

  if [ "${CHECK_RUN_STATUS}" == "200" ];then
    echo "> succeeded!"
  else
    echo "> failed! (${CHECK_RUN_STATUS})"
  fi
}