analyze-deployment-stats-from-octopus.js

const xml2js = require('xml2js');
const fs = require('fs');
const xmlFileName = 'deployments.xml';
const environment = 'PROD';
const year = '2019';

xml2js.parseString(fs.readFileSync(xmlFileName), function (err, result) {

    if (err) throw err;

    var filteredDeployments = result.Deployments.Deployment.filter(filterConditions);

    var projectAndDeployCount = filteredDeployments.reduce(countByProjectName, {});

    console.log('Total successful deploys to ' + environment + ' in ' + year + ': ' + filteredDeployments.length);
    console.table(sortByMostDeploys(projectAndDeployCount));
});

function filterConditions(deployment) {
    return deployment.TaskState[0] === 'Success'
            && deployment.CompletedTime[0].startsWith(year + '-')
            && deployment.EnvironmentName[0] === environment;
}

function countByProjectName(state, value) {
    var projectName = value.ProjectName[0];
    if (typeof state[projectName] === 'undefined')
        state[projectName] = 1;
    else
        state[projectName]++;
    return state;
}

function sortByMostDeploys(projectAndDeployCount) {
    return Object.entries(projectAndDeployCount).sort((a, b) => b[1] - a[1]);
}