Node script for parsing a Github web hook payload in Jenkins and extracting the commit hash.

jenkinsParsePayload.sh

#!/usr/bin/env node

// Grab environment variables
var payloadString = process.env.payload;

// If no payload was received there is nothing to do. Not allowed to use "null".
if (payloadString === "nodata") { // This assume the default payload parameter value is "nodata". Not allowed to use "null".
  return 0;
}

// Parse JSON
var payloadObject = JSON.parse(payloadString);

var latestCommitHash = payloadObject.pull_request.head.sha;

console.log("Found latest commit: " + latestCommitHash);