Write a helper function to send a cloudevent

[christian-kreuzberger-dtx]

To avoid code duplication, a helper function that sends a CloudEvent to Keptn would be nice.

For instance, this is the code that is duplicated right now:

    def requestBody = """{
        |  "data": {
        |    "project": "${project}",
        |    "stage": "${stage}",
        |    "service": "${service}",
        |    "labels": {
        |      "buildId" : "${tag}",
        |      "jobname" : "${JOB_NAME}",
        |      "buildNumber": "${BUILD_NUMBER}",
        |      "joburl" : "${BUILD_URL}"
        |    },
        |    "deployment": {
        |      "deploymentstrategy": "direct",
        |      "deploymentURIsPublic": [
        |                "${deploymentURI}"
        |             ]
        |    }
        |  },
        |  "datacontenttype": "application/json",
        |  "source": "jenkins-library",
        |  "specversion": "1.0",
        |  "type": "sh.keptn.event.deployment.finished",
        |  "shkeptnspecversion": "${KEPTN_SPEC_VERSION}"
        |}
    """.stripMargin()

    // lets add our custom labels
    requestBody = addCustomLabels(requestBody, labels)
     
    def response = httpRequest contentType: 'APPLICATION_JSON', 
      customHeaders: [[maskValue: true, name: 'x-token', value: "${keptn_api_token}"]], 
      httpMode: 'POST', 
      requestBody: requestBody, 
      responseHandle: 'STRING', 
      url: "${keptn_endpoint}/v1/event", 
      validResponseCodes: "100:404", 
      ignoreSslErrors: true

    // write response to keptn.context.json & add to artifacts
    def keptnContext = writeKeptnContextFiles(response)

Optimizations

• Adding project, service, stage, labels, specversion, shkeptnspecversion, source, datacontenttype, ... could be moved into the helper function
• sending the http request could be moved into the helper function