ci(gulp): support multi-application samples

tools/gulp/tasks/samples.ts

@@ -5,7 +5,7 @@ import { task } from 'gulp';
 import { resolve } from 'path';
 import { promisify } from 'util';
 import { samplePath } from '../config';
-import { getDirs } from '../util/task-helpers';
+import { containsPackageJson, getDirs } from '../util/task-helpers';
 
 const exec = promisify(childProcess.exec);
 
@@ -16,15 +16,39 @@ async function executeNpmScriptInSamples(
   const directories = getDirs(samplePath);
 
   for await (const dir of directories) {
+    // Check if the sample is a multi-application sample
+    const isSingleApplicationSample = containsPackageJson(dir);
+    if (!isSingleApplicationSample) {
+      // Application is a multi-application sample
+      // Go down into the sub-directories
+      const subDirs = getDirs(dir);
+      for (const subDir of subDirs) {
+        await executeNPMScriptInDirectory(subDir, script, appendScript);
+      }
+    } else {
+      await executeNPMScriptInDirectory(dir, script, appendScript);
+    }
+  }
+}
+
+/**
+ * Executes the provided NPM script in the specified directory
+ * @param dir directory of the application
+ * @param script script to execute
+ * @param appendScript additional params appended to the script
+ */
+async function executeNPMScriptInDirectory(
+  dir: string,
+  script: string,
+  appendScript?: string,
+) {
   const dirName = dir.replace(resolve(__dirname, '../../../'), '');
   log.info(`Running ${clc.blue(script)} in ${clc.magenta(dirName)}`);
   try {
     const result = await exec(
       `${script} --prefix ${dir} ${appendScript ? '-- ' + appendScript : ''}`,
     );
-      log.info(
-        `Finished running ${clc.blue(script)} in ${clc.magenta(dirName)}`,
-      );
+    log.info(`Finished running ${clc.blue(script)} in ${clc.magenta(dirName)}`);
     if (result.stderr) {
       log.error(result.stderr);
     }
@@ -32,9 +56,7 @@ async function executeNpmScriptInSamples(
       log.error(result.stdout);
     }
   } catch (err) {
-      log.error(
-        `Failed running ${clc.blue(script)} in ${clc.magenta(dirName)}`,
-      );
+    log.error(`Failed running ${clc.blue(script)} in ${clc.magenta(dirName)}`);
     if (err.stderr) {
       log.error(err.stderr);
     }
@@ -44,7 +66,6 @@ async function executeNpmScriptInSamples(
     process.exit(1);
   }
 }
-}
 
 task('install:samples', async () =>
   executeNpmScriptInSamples(

tools/gulp/util/task-helpers.ts

@@ -12,3 +12,12 @@ export function getFolders(dir: string) {
 export function getDirs(base: string) {
   return getFolders(base).map(path => `${base}/${path}`);
 }
+
+/**
+ * Checks if the directory contains a package.json file
+ * @param dir Path to the dircetory
+ * @returns True if the directory contains a package.json
+ */
+export function containsPackageJson(dir: string) {
+  return readdirSync(dir).some(file => file === 'package.json');
+}