"yarn build-plugin" command added

Summary: Added "build-plugin" command. Can be used like this: `yarn build-plugin fresco` which produces package to 'sonar/dist/plugins/fresco.tgz'

Reviewed By: mweststrate

Differential Revision: D22160253

fbshipit-source-id: 48b202984b0f515bf253b595be1f59953a9ce411

desktop/package.json

@@ -233,6 +233,8 @@
     "build:dev": "cross-env NODE_ENV=development ./ts-node scripts/build-release.ts $@",
     "prebuild-headless": "yarn build:pkg",
     "build-headless": "cross-env NODE_ENV=production ./ts-node scripts/build-headless.ts $@",
+    "prebuild-plugin": "yarn build:pkg",
+    "build-plugin": "./ts-node scripts/build-plugin.ts",
     "open-dist": "open ../dist/mac/Flipper.app --args --launcher=false --inspect=9229",
     "fix": "eslint . --fix --ext .js,.ts,.tsx",
     "pretest": "yarn build:pkg",

desktop/scripts/build-plugin.ts

@@ -0,0 +1,54 @@
+/**
+ * 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 {pluginsDir, rootDir, distDir} from './paths';
+import path from 'path';
+import fs from 'fs-extra';
+import {execSync} from 'child_process';
+
+(async function buildPlugin() {
+  const pluginDirArg = process.argv[2];
+  const pluginDir = await resolveAbsolutePluginDir(pluginDirArg);
+  if (path.relative(pluginsDir, pluginDir).includes('..')) {
+    throw new Error(
+      `Plugin dir ${pluginDir} is not inside plugins directory ${pluginsDir}`,
+    );
+  }
+  const outputFile = path.join(
+    distDir,
+    'plugins',
+    path.relative(pluginsDir, pluginDir) + '.tgz',
+  );
+  await fs.ensureDir(path.dirname(outputFile));
+  await fs.remove(outputFile);
+  const bundleCmd = `yarn flipper-pkg bundle "${pluginDir}" --production`;
+  const packCmd = `yarn pack --cwd "${pluginDir}" --filename ${outputFile}`;
+  execSync(bundleCmd, {cwd: rootDir, stdio: 'inherit'});
+  execSync(packCmd, {cwd: rootDir, stdio: 'inherit'});
+})();
+
+async function resolveAbsolutePluginDir(dir: string): Promise<string> {
+  if (path.isAbsolute(dir)) {
+    return dir;
+  }
+  const resolvedFromPluginDir = path.resolve(pluginsDir, dir);
+  if (await fs.pathExists(resolvedFromPluginDir)) {
+    return resolvedFromPluginDir;
+  }
+  const resolvedFromCwd = path.resolve(process.cwd(), dir);
+  if (await fs.pathExists(resolvedFromCwd)) {
+    return resolvedFromCwd;
+  }
+  throw new Error(
+    `Cannot resolve plugin dir path. Paths checked: ${[
+      resolvedFromPluginDir,
+      resolvedFromCwd,
+    ]}`,
+  );
+}