grunt-karma-coveralls/tasks/main.js

An npm module for using Karma and Coveralls with Grunt

var fs = require('fs');
var glob = require('glob');
var logger = require('log-driver')({level: 'debug'});

function main(grunt){

  grunt.task.registerTask('coveralls', 'Coveralls coverage with Karma', function(){
    var gruntOptions = grunt.config('coveralls.options');
    if (gruntOptions.coverage_dir){
        console.warn("DEPRECATION: use coverageDir instead of coverage_dir");
        gruntOptions.coverageDir = gruntOptions.coverage_dir;
    }

    var done = this.async();
    process.env.NODE_COVERALLS_DEBUG = gruntOptions.debug ? 1 : 0;
    gruntOptions.recursive = typeof gruntOptions.recursive === 'undefined' ? true : gruntOptions.recursive;
    var input = getInput(gruntOptions.coverageDir, gruntOptions.recursive);
    callCoveralls(done, input, gruntOptions);
  });

};

function callCoveralls(done, input, gruntOptions){
  var coveralls = require('coveralls/index');
  coveralls.getBaseOptions(function(err, options){
    options.filepath = ".";
    coveralls.convertLcovToCoveralls(input, options, function(err, postData){
      handleError(done, err, gruntOptions.force);
      if (!gruntOptions.dryRun) {
        coveralls.sendToCoveralls(postData, function(err, response, body){
          sendToCoverallsCallback(done, err, response, body, gruntOptions.force);
        });
      } else {
        fs.writeFileSync(gruntOptions.coverageDir + '/coveralls.json', JSON.stringify(postData));
        done();
      }
    });
  });
}

function handleError(done, err, force) {
  if (err){
    done(force);
    if (!force) {
      throw err;
    }
  }
}

function sendToCoverallsCallback(done, err, response, body, force){
  handleError(done, err, force);
  if (response && 'statusCode' in response && response.statusCode >= 400){
    if (response.statusCode === 503){
      logger.warn("Coveralls is currently down for maintenance");
    }
    else {
      handleError(done, "Bad response:" + response.statusCode + " " + body, force);
      return;
    }
  }
  done();
}

function getInput(basePath, recursive){
  var subdirs = recursive ? "/**" : "";
  var lcov_path = glob.sync(basePath + subdirs + "/lcov.info")[0];
  if (!lcov_path){
    logger.error("lcov.info not found in `" + basePath + "`");
  }
  return fs.readFileSync(lcov_path).toString();
}

module.exports = main;