feat(utils/env-manager): adds purePaths; updates initial; exports ini…

…tialized manager as default

src/utils/env-manager.ts

@@ -2,25 +2,28 @@ import pathKey from 'path-key';
 import alter from 'manage-path';
 import { IOfType } from '~/types';
 
-export default class EnvManager {
-  private key: string;
+export class EnvManager {
+  public path: string;
   private env: IOfType<string | undefined>;
   private initial: IOfType<string | undefined>;
   private assigned: IOfType<string | undefined>;
   public constructor(env: IOfType<string | undefined>) {
-    this.key = pathKey({ env });
+    this.path = pathKey({ env });
     this.env = env;
     this.initial = Object.assign({}, env);
     this.assigned = {};
   }
-  public assign(env: IOfType<string | undefined>): void {
-    Object.assign(this.env, env);
-    Object.assign(this.assigned, env);
+  public get purePaths(): string | undefined {
+    return this.initial[this.path];
   }
   public addPaths(paths: string[]): void {
-    const env = { [this.key]: this.env[this.key] };
+    const env = { PATH: this.env[this.path] };
     alter(env).unshift(paths);
-    this.assign(env);
+    this.assign({ [this.path]: env.PATH });
+  }
+  public assign(env: IOfType<string | undefined>): void {
+    Object.assign(this.env, env);
+    Object.assign(this.assigned, env);
   }
   public restore(): void {
     const toRestore = Object.keys(this.assigned).reduce(
@@ -32,6 +35,9 @@ export default class EnvManager {
     );
 
     Object.assign(this.env, toRestore);
+    this.initial = Object.assign({}, this.env);
     this.assigned = {};
   }
 }
+
+export default new EnvManager(process.env);