feat(nx-heroku): add separate helpers for plugins and buildpacks

packages/nx-heroku/src/executors/common/heroku/buildpacks.ts

@@ -0,0 +1,19 @@
+import { exec } from '../utils';
+
+export async function clearBuildPacks(options: { appName: string }) {
+  const { appName } = options;
+  // stdout contains : Buildpacks cleared. Next release on <appName> will detect buildpacks normally.
+  await exec(`heroku buildpacks:clear --app ${appName}`);
+}
+
+export async function addBuildPack(options: {
+  appName: string;
+  buildPack: string;
+  index: number;
+}) {
+  const { appName, buildPack, index } = options;
+  // stdout contains : Buildpack added. Next release on <appName> will use <buildPack>.
+  await exec(
+    `heroku buildpacks:add ${buildPack} --app ${appName} --index ${index}`
+  );
+}

packages/nx-heroku/src/executors/common/heroku/index.ts

@@ -16,8 +16,10 @@ export async function dynoCommand(options: {
 export * from './addons';
 export * from './apps';
 export * from './auth';
+export * from './buildpacks';
 export * from './config-vars';
 export * from './drains';
 export * from './error';
 export * from './members';
+export * from './plugins';
 export * from './webhooks';

packages/nx-heroku/src/executors/common/heroku/plugins.ts

@@ -0,0 +1,19 @@
+import { exec } from '../utils';
+
+export async function getPlugins(): Promise<string[]> {
+  const { stdout } = await exec('heroku plugins', { encoding: 'utf8' });
+  return stdout
+    .trim()
+    .split('\n')
+    .map((line) => line.trim().split(' ')[0]);
+}
+
+export async function hasPlugin(plugin: string): Promise<boolean> {
+  const list = await getPlugins();
+  return list.includes(plugin);
+}
+
+export async function installPlugin(plugin: string): Promise<void> {
+  const { stdout, stderr } = await exec(`heroku plugins:install ${plugin}`);
+  console.warn('installPlugin', stdout, stderr);
+}