command.start.js
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"use strict";
var path = require("path");
var fs = require("fs");
var _ = require("../../lodash.custom");
var utils = require("../utils");
var opts = require("./cli-options").utils;
/**
* $ browser-sync start <options>
*
* This commands starts the Browsersync servers
* & Optionally UI.
*
* @param opts
* @returns {Function}
*/
module.exports = function (opts) {
var flags = preprocessFlags(opts.cli.flags);
var maybepkg = path.resolve(process.cwd(), "package.json");
var input = flags;
if (flags.config) {
var maybeconf = path.resolve(process.cwd(), flags.config);
if (fs.existsSync(maybeconf)) {
var conf = require(maybeconf);
input = _.merge({}, conf, flags);
} else {
utils.fail(true, new Error("Configuration file '" + flags.config + "' not found"), opts.cb);
}
} else {
if (fs.existsSync(maybepkg)) {
var pkg = require(maybepkg);
if (pkg["browser-sync"]) {
console.log("> Configuration obtained from package.json");
input = _.merge({}, pkg["browser-sync"], flags);
}
}
}
return require("../../")
.create("cli")
.init(input, opts.cb);
};
/**
* @param flags
* @returns {*}
*/
function preprocessFlags (flags) {
return [
stripUndefined,
legacyFilesArgs
].reduce(function (flags, fn) {
return fn.call(null, flags);
}, flags);
}
/**
* Incoming undefined values are problematic as
* they interfere with Immutable.Map.mergeDeep
* @param subject
* @returns {*}
*/
function stripUndefined (subject) {
return Object.keys(subject).reduce(function (acc, key) {
var value = subject[key];
if (typeof value === "undefined") {
return acc;
}
acc[key] = value;
return acc;
}, {});
}
/**
* @param flags
* @returns {*}
*/
function legacyFilesArgs(flags) {
if (flags.files && flags.files.length) {
flags.files = flags.files.reduce(function (acc, item) {
return acc.concat(opts.explodeFilesArg(item));
}, []);
}
return flags;
}