improved error reporting for optional dependencies

we don't want to annoy users with stack traces there

Author: FND

lib/util.js

@@ -1,14 +1,14 @@
 "use strict";
 
-let { repr } = require("faucet-pipeline/lib/util");
+let { abort, repr } = require("faucet-pipeline/lib/util");
 
 let NOTIFY = '(typeof alert !== "undefined" ? alert : console.error)';
 
 exports.requireOptional = function requireOptional(pkg, errorMessage, supplier = pkg) {
 	try {
 		return require(pkg);
 	} catch(err) {
-		throw new Error(`${errorMessage} - please install ${repr(supplier)}`);
+		abort(`${errorMessage} - please install ${repr(supplier)}`);
 	}
 };
 

package.json

@@ -26,7 +26,7 @@
 		"node": ">=6"
 	},
 	"dependencies": {
-		"faucet-pipeline": "1.0.0-beta.1",
+		"faucet-pipeline": "~1.0.0-beta.2",
 		"mkdirp": "^0.5.1",
 		"rollup": "^0.56.3",
 		"rollup-plugin-commonjs": "^8.3.0",