config source

lib/Sources/ConfigSource.ts

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) Sapphirecode - All Rights Reserved
+ * This file is part of console-app which is released under MIT.
+ * See file 'LICENSE' for full license details.
+ * Created by Timo Hocker <timo@scode.ovh>, May 2020
+ */
+
+/* eslint-disable no-await-in-loop */
+import fs from 'fs-extra';
+import { OptionProcess } from '../Option';
+import { OptionSource } from './OptionSource';
+
+export class ConfigSource extends OptionSource {
+  private _config_files: string[];
+
+  public constructor (config_files: string[]) {
+    super ();
+    this._config_files = config_files;
+  }
+
+  public async parse (options: OptionProcess[]): Promise<void> {
+    const data: Record<string, unknown> = {};
+    for (const f of this._config_files) {
+      if (await fs.pathExists (f)) {
+        try {
+          const json = JSON.parse (await fs.readFile (f, 'utf-8'));
+          for (const key of Object.keys (json))
+            data[key] = json[key];
+        }
+        catch {
+          continue;
+        }
+      }
+    }
+
+    const keys = Object.keys (data);
+
+    await Promise.all (options.map (async (opt) => {
+      if (keys.includes (opt.name))
+        await this.assign_arg (opt, data[opt.name]);
+    }));
+  }
+}