Different npm install result from npm 5.

Author: TomaNikolov

lib/declarations.d.ts

@@ -149,6 +149,37 @@ interface INpmPeerDependencyInfo {
 	peerMissing: boolean;
 }
 
+/**
+ * Describes information about dependency update packages.
+ */
+interface INpm5DependencyInfo {
+	/**
+	 * Npm action type.
+	 * @type {string}
+	 */
+	action: string;
+	/**
+	 * Dependency name.
+	 * @type {string}
+	 */
+	name: string;
+	/**
+	 * Dependency version.
+	 * @type {string}
+	 */
+	version: string;
+	/**
+	 * Destination of the installation.
+	 * @type {string}
+	 */
+	path: string;
+	/**
+	 * Dependency previous version.
+	 * @type {string}
+	 */
+	previousVersion: string;
+}
+
 /**
  * Describes information returned by the npm CLI upon calling install with --json flag.
  */
@@ -168,13 +199,54 @@ interface INpmInstallCLIResult {
 	 * Whenever installing npm prints the information by reversing the tree of operations and because the initial dependency was installed last it is listed first.
 	 * @type {INpmDependencyInfo | INpmPeerDependencyInfo}
 	 */
-	dependencies: INpmDependencyInfo | INpmPeerDependencyInfo;
+	dependencies?: INpmDependencyInfo | INpmPeerDependencyInfo;
 	/**
 	 * Describes problems that might have occurred during installation. For example missing peer dependencies.
 	 */
 	problems?: string[];
 }
 
+/**
+ * Describes information returned by the npm 5 CLI upon calling install with --json flag.
+ */
+interface INpm5InstallCliResult {
+	/**
+	 * Added dependencies. Note that whenever add a particular dependency with npm 5 it is listed inside of array with key "Added".
+	 * @type {INpmDependencyUpdateInfo[]}
+	 */
+	added: INpm5DependencyInfo[];
+	/**
+	 * Removed dependencies. Note that whenever remove a particular dependency with npm 5 it is listed inside of array with key "removed".
+	 * @type {INpmDependencyUpdateInfo[]}
+	 */
+	removed: INpm5DependencyInfo[];
+	/**
+	 * Updated dependencies. Note that whenever update a particular dependency with npm 5 it is listed inside of array with key "updated".
+	 * @type {INpmDependencyUpdateInfo[]}
+	 */
+	updated: INpm5DependencyInfo[];
+	/**
+	 * Moved dependencies. Note that whenever move a particular dependency with npm 5 it is listed inside of array with key "moved".
+	 * @type {INpmDependencyUpdateInfo[]}
+	 */
+	moved: INpm5DependencyInfo[];
+	/**
+	 * Failed dependencies. Note that whenever use npm 5 and the operation over particular dependency fail it is listed inside of array with key "failed".
+	 * @type {INpmDependencyUpdateInfo[]}
+	 */
+	failed: INpm5DependencyInfo[];
+	/**
+	 * Warnings. Note that whenever use npm 5 and the operation over particular dependency have warnings they are listed inside of array with key "warnings".
+	 * @type {INpmDependencyUpdateInfo[]}
+	 */
+	warnings: INpm5DependencyInfo[];
+	/**
+	 *Time elapsed.
+	 * @type {Number}
+	 */
+	elapsed: Number
+}
+
 /**
  * Describes information about installed package.
  */
@@ -193,7 +265,7 @@ interface INpmInstallResultInfo {
 	 * The original output that npm CLI produced upon installation.
 	 * @type {INpmInstallCLIResult}
 	 */
-	originalOutput?: INpmInstallCLIResult;
+	originalOutput?: INpmInstallCLIResult | INpm5InstallCliResult;
 }
 
 interface INpmInstallOptions {

lib/node-package-manager.ts

@@ -143,9 +143,23 @@ export class NodePackageManager implements INodePackageManager {
 	private parseNpmInstallResult(npmDryRunInstallOutput: string, npmInstallOutput: string, userSpecifiedPackageName: string): INpmInstallResultInfo {
 		// TODO: Add tests for this functionality
 		try {
-			const originalOutput: INpmInstallCLIResult = JSON.parse(npmDryRunInstallOutput);
-			const name = _.head(_.keys(originalOutput.dependencies));
-			const dependency = _.pick<INpmDependencyInfo, INpmDependencyInfo | INpmPeerDependencyInfo>(originalOutput.dependencies, name);
+			const originalOutput: INpmInstallCLIResult | INpm5InstallCliResult = JSON.parse(npmDryRunInstallOutput);
+			const npm5Output = <INpm5InstallCliResult> originalOutput;
+			const npmOutput = <INpmInstallCLIResult> originalOutput;
+			const name = _.head(_.keys(npmOutput.dependencies));
+
+			// Npm 5 return different object after performing `npm install --dry-run`.
+			// Considering that the dependency is already installed we should
+			// find it in the `updated` key as a first element of the array.
+			if (!name && npm5Output.updated) {
+				const updatedDependency = npm5Output.updated[0];
+				return {
+					name: updatedDependency.name,
+					originalOutput,
+					version: updatedDependency.version
+				};
+			}
+			const dependency = _.pick<INpmDependencyInfo, INpmDependencyInfo | INpmPeerDependencyInfo>(npmOutput.dependencies, name);
 			return {
 				name,
 				originalOutput,