added devDependencies to package.json diff

Author: Plamen5kov

lib/node-package-manager.ts

@@ -30,6 +30,11 @@ export class NodePackageManager implements INodePackageManager {
 					for(let name in jsonContentBefore.dependencies) {
 						dependenciesBefore.push(name);
 					}
+					if(jsonContentBefore.devDependencies) {
+						for(let devName in jsonContentBefore.devDependencies) {
+							dependenciesBefore.push(devName);
+						}
+					}
 				}
 
 				let flags = this.getFlagsString(config, true);
@@ -46,6 +51,11 @@ export class NodePackageManager implements INodePackageManager {
 					for(let name in jsonContentAfter.dependencies) {
 						dependenciesAfter.push(name);
 					}
+					if(jsonContentAfter.devDependencies) {
+						for(let devName in jsonContentAfter.devDependencies) {
+							dependenciesAfter.push(devName);
+						}
+					}
 				}
 
 				/** This diff is done in case the installed pakcage is a URL address, a path to local directory or a .tgz file
@@ -54,11 +64,18 @@ export class NodePackageManager implements INodePackageManager {
 				 * 	The solution is to compare package.json project dependencies before and after install and get the name of the installed package,
 				 * 	even if it's installed through local path or URL. If command installes more than one package, only the package originally installed is returned.
 				 */
-				let diff = _(jsonContentAfter.dependencies)
+				let dependencyDiff = _(jsonContentAfter.dependencies)
 					.omitBy((val: string, key: string) => jsonContentBefore && jsonContentBefore.dependencies && jsonContentBefore.dependencies[key] && jsonContentBefore.dependencies[key] === val)
 					.keys()
 					.value();
 
+				let devDependencyDiff = _(jsonContentAfter.devDependencies)
+					.omitBy((val: string, key: string) => jsonContentBefore && jsonContentBefore.devDependencies && jsonContentBefore.devDependencies[key] && jsonContentBefore.devDependencies[key] === val)
+					.keys()
+					.value();
+
+				let diff = dependencyDiff.concat(devDependencyDiff);
+
 				if(diff.length <= 0 && dependenciesBefore.length === dependenciesAfter.length && packageName !== pathToSave) {
 					this.$errors.failWithoutHelp(`The plugin ${packageName} is already installed`);
 				}