Added command "flipper-pkg checksum"

Summary: Changelog: Added command `flipper-pkg checksum` for computing the total checksum of all the files included into plugin package.

Reviewed By: passy

Differential Revision: D22255125

fbshipit-source-id: a4f91370b4ab16ea4ce4a60e29f9d20fdd5f4331

desktop/pkg/src/commands/checksum.ts

@@ -0,0 +1,37 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {Command} from '@oclif/command';
+import {args} from '@oclif/parser';
+import path from 'path';
+import computePackageChecksum from '../utils/computePackageChecksum';
+
+export default class Lint extends Command {
+  public static description =
+    'computes the total checksum of all the package files';
+
+  public static examples = [`$ flipper-pkg checksum path/to/plugin`];
+
+  public static args: args.IArg[] = [
+    {
+      name: 'directory',
+      required: false,
+      default: '.',
+      description:
+        'Path to plugin package directory. Defaults to the current working directory.',
+    },
+  ];
+
+  public async run() {
+    const {args} = this.parse(Lint);
+    const inputDirectory: string = path.resolve(process.cwd(), args.directory);
+    const checksum = await computePackageChecksum(inputDirectory);
+    console.log(checksum);
+  }
+}