apeman-task-coverage/lib/define.js

/**
 * apeman task to measure coverage.
 * @memberof module:apeman-task-coverage/lib
 * @function define
 * @param {string} script - Script to run for coverage.
 * @param {options} [options] - Optional settings.
 * @param {string} [options.out="coverage"] - Output directory.
 * @returns {function} - Defined task function.
 */

"use strict";

var argx = require('argx'),
    execcli = require('execcli'),
    findout = require('findout'),
    objnest = require('objnest');

/** @lends define */
function define(script, options) {
    var args = argx(arguments);
    options = objnest.expand(args.pop('object') || {});

    var out = options.out || 'coverage';

    /**
     * Defined task.
     * @function task
     * @param {object} context - Apeman task context.
     * @param {function} callback - Callback when done.
     */
    function task(context, callback) {
        var logger = context.logger,
            verbose = context.verbose;

        var cmdArgs = ['cover'].concat(script.split(' ')).concat({
            dir: out
        });
        define.istanbul(cmdArgs, callback);
    }

    task.$desc = "Measure test coverage.";
    return task;
}

define.istanbul = function istanbul(args, callback) {
    function _resolveBy(cwd) {
        return findout.resolve('node_modules/.bin/istanbul', {
            safe: true,
            cwd: cwd
        });
    }

    var cmd = _resolveBy(process.cwd()) || _resolveBy(__dirname) || 'istanbul';
    execcli(cmd, args, {
        notfound: 'try `npm install istanbul -g`'
    }, callback);
};

module.exports = define;