Jenkins build categorization by month

README.md

1. Open a project in Jenkins
2. Click "more" in Build History (this should show all builds in that project)
3. Open console, paste in above code.
4. Inspect buildStats object.

jenkins-build-history-categorization-by-month.js

var buildStats = {};

function buildChecker(buildRow) {
	var linkText = Prototype.Selector.select('td:nth-child(2) a', buildRow);
	var dateTxt  = linkText && linkText.first() && (typeof linkText.first().text != 'undefined') && linkText.first().text.match(/([a-z]{3})-2014/i);
	if (dateTxt) {
		var date = dateTxt[1];
			// console.log('date is', date);
		
		var img = Prototype.Selector.select('td:first-child img', buildRow);
			// console.log('img', img);
		if (!buildStats[date]) buildStats[date] = {};
		if (img.first() && img.first().alt != '') {
			var state = (img.first().alt.match(/Success/) ? 'success' : 'failure');
			if (buildStats[date][state]) {
				// console.log('adding +1 to', date, state)
				buildStats[date][state] += 1;
			} else {
				// console.log('adding +1 to', date, state)
				buildStats[date][state] = 1;
			}
		}
	}
}

$$("#buildHistory > tbody > tr").each(buildChecker);
buildStats