codeshipCombineTestPipelineLogs.js

var logLocationInforation = [];
var logs = [];

function download(filename, text) {
  var pom = document.createElement('a');
  pom.setAttribute('href', URL.createObjectURL(new Blob([text], {type: "application/octet-stream"})));
  pom.setAttribute('download', filename);

  if (document.createEvent) {
    var event = document.createEvent('MouseEvents');
    event.initEvent('click', true, true);
    pom.dispatchEvent(event);
  }
  else {
    pom.click();
  }
}

function getPipelines() { return $('*div[data-pipelines]').first().data('pipelines'); }

function fetchLogLocationInformation(pipelines) {
  return pipelines.map(function(pipeline) {
    var orderedSteps = pipeline.steps.reverse();
    var testStep = orderedSteps[0]
    return $.get('https://app.codeship.com' + testStep.log_path + '.json').then(function(data){ 
      logLocationInforation.push({ name: pipeline.name, logPath: data.url });
    })
  })
}

function fetchLogs(logLocationInforation) {
  return logLocationInforation.map(function(logInfo) {
    return $.get(logInfo.logPath).then(function(data){ 
      logs.push({ name: logInfo.name, data: data });
    })
  })
}


var pipelines = getPipelines();
var logLocationInformationPromises = fetchLogLocationInformation(pipelines);

$.when.apply($, logLocationInformationPromises).done(function() { 
  var logPromises = fetchLogs(logLocationInforation)
  $.when.apply($, logPromises).done(function() { 
    combinedLog = ''
    ansiRegex = /[\u001b\u009b][[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-ORZcf-nqry=><]/g
    logs.forEach(function(log) {
      combinedLog = combinedLog + log.name + '\n\n';
      combinedLog = combinedLog + log.data.replace(ansiRegex, '') + '\n\n';
    })
    download('combinedLog.log', combinedLog);
  })
})

This was written quickly and needs refactoring. Anybody that uses it, feel free to improve and post here in the comments.