fix: some yarn2 fixes

Author: farfromrefug

lib/base-package-manager.ts

@@ -130,7 +130,7 @@ export abstract class BasePackageManager implements INodePackageManager {
 	protected getFlagsString(config: any, asArray: boolean): any {
 		const array: Array<string> = [];
 		for (const flag in config) {
-			if (flag === "global" && this.packageManager !== "yarn") {
+			if (flag === "global" && this.packageManager !== "yarn" && this.packageManager !== "yarn2") {
 				array.push(`--${flag}`);
 				array.push(`${config[flag]}`);
 			} else if (config[flag]) {
@@ -141,7 +141,12 @@ export abstract class BasePackageManager implements INodePackageManager {
 					flag === "gradle" ||
 					flag === "version_info"
 				) {
-					array.push(` ${flag}`);
+					if (this.packageManager === "yarn2") {
+						array.push(`--fields ${flag}`);
+					} else {
+						array.push(` ${flag}`);
+
+					}
 					continue;
 				}
 				array.push(`--${flag}`);

lib/yarn2-package-manager.ts

@@ -89,16 +89,16 @@ export class Yarn2PackageManager extends BasePackageManager {
 		let viewResult: any;
 		try {
 			viewResult = await this.$childProcess.exec(
-				`yarn info ${packageName} ${flags}`
+				`yarn npm info ${packageName} ${flags}`
 			);
 		} catch (e) {
 			this.$errors.fail(e.message);
 		}
 
 		try {
-			const result = JSON.parse(viewResult);
-			return result.data;
+			return JSON.parse(viewResult);
 		} catch (err) {
+			this.$errors.fail(err.message);
 			return null;
 		}
 	}