feature(defaults): remove entry and output.path validation (#217)

* feat(defaults): remove validations from entry and output.path

* feat(defaults): bump optional dependency to alpha.1

* add comma to pkg.json and update yarn

bin/convert-argv.js

@@ -554,35 +554,6 @@ module.exports = function(yargs, argv, convertOptions) {
 
 		mapArgToBoolean("profile");
 
-		if (noOutputFilenameDefined) {
-			ensureObject(options, "output");
-			if (convertOptions && convertOptions.outputFilename) {
-				options.output.path = path.resolve(
-					path.dirname(convertOptions.outputFilename)
-				);
-				options.output.filename = path.basename(convertOptions.outputFilename);
-			} else if (argv._.length > 0) {
-				options.output.filename = argv._.pop();
-				options.output.path = path.resolve(
-					path.dirname(options.output.filename)
-				);
-				options.output.filename = path.basename(options.output.filename);
-			} else if (configFileLoaded) {
-				throw new Error(
-					"'output.filename' is required, either in config file or as --output-filename"
-				);
-			} else {
-				console.error(
-					"No configuration file found and no output filename configured via CLI option."
-				);
-				console.error(
-					"A configuration file could be named 'webpack.config.js' in the current directory."
-				);
-				console.error("Use --help to display the CLI options.");
-				process.exit(-1); // eslint-disable-line
-			}
-		}
-
 		if (argv._.length > 0) {
 			if (Array.isArray(options.entry) || typeof options.entry === "string") {
 				options.entry = {
@@ -621,23 +592,5 @@ module.exports = function(yargs, argv, convertOptions) {
 				}
 			});
 		}
-
-		if (!options.entry) {
-			if (configFileLoaded) {
-				console.error("Configuration file found but no entry configured.");
-			} else {
-				console.error(
-					"No configuration file found and no entry configured via CLI option."
-				);
-				console.error(
-					"When using the CLI you need to provide at least two arguments: entry and output."
-				);
-				console.error(
-					"A configuration file could be named 'webpack.config.js' in the current directory."
-				);
-			}
-			console.error("Use --help to display the CLI options.");
-			process.exit(-1); // eslint-disable-line
-		}
 	}
 };

package.json

@@ -86,7 +86,7 @@
   },
   "optionalDependencies": {
     "schema-utils": "^0.4.2",
-    "webpack": "^4.0.0-alpha.0",
+    "webpack": "^4.0.0-alpha.1",
     "webpack-dev-server": "^2.9.7"
   }
 }