feat: add template.visibleFiles option

Author: AriPerkkio

Diff for: docs/tutorialkit.dev/src/content/docs/guides/creating-content.mdx

@@ -91,6 +91,14 @@ To get a better understanding of how the code you create in each lesson results
 
 The `_solution` folder contains the code for the lesson in its solved state. This is the code that the user will see when they click the "Solve" button in the tutorial app. The folder usually contains the same files as the `_files` folder, but with the code filled in. It may also include additional files.
 
+### File Visibility
+
+Editor's files are resolved by three steps. Each step overrides previous one:
+
+1. Display files matching `template.visibleFiles` (lowest priority)
+2. Display files from `_files` directory
+3. When solution is revealed, display files from `_solution` directory. (highest priority)
+
 ## Code templates
 
 For the code to run in the preview, it must be an actual, working application, including a dev server and any necessary configuration files. Usually, it's not practical to include this kind of boilerplate files in a lesson content (and copy it for every further lesson!). Instead, you can use the `template` feature of TutorialKit to provide a base project that will be used for all lessons.
@@ -110,6 +118,19 @@ template: my-advanced-template
 
 This declaration will make TutorialKit use the `src/templates/my-advanced-template` directory as the base for the lesson.
 
+By default files in template are not shown in the code editor.
+To make them visible, you can use `visibleFiles` option.
+This can reduce repetition when you want to show same files visible in multiple lessons.
+
+```markdown {5}
+---
+title: Advanced Topics
+template:
+  name: my-advanced-template
+  visibleFiles: ['src/index.js', '**/utils/**']
+---
+```
+
 If you start having a lot of templates and they all share some files, you can create a shared template that they all extend. This way, you can keep the shared files in one place and avoid duplication. To do that, you need to specify the `extends` property in the template's `.tk-config.json` file:
 
 ```json

Diff for: packages/astro/package.json

@@ -50,6 +50,7 @@
     "kleur": "4.1.5",
     "mdast-util-directive": "^3.0.0",
     "mdast-util-to-markdown": "^2.1.0",
+    "micromatch": "^4.0.7",
     "nanostores": "^0.10.3",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
@@ -62,6 +63,7 @@
   "devDependencies": {
     "@tutorialkit/types": "workspace:*",
     "@types/mdast": "^4.0.4",
+    "@types/micromatch": "^4.0.9",
     "esbuild": "^0.20.2",
     "esbuild-node-externals": "^1.13.1",
     "execa": "^9.2.0",

Diff for: packages/astro/src/default/utils/content.ts

@@ -10,6 +10,7 @@ import type {
 import { folderPathToFilesRef, interpolateString } from '@tutorialkit/types';
 import { getCollection } from 'astro:content';
 import glob from 'fast-glob';
+import mm from 'micromatch';
 import path from 'node:path';
 import { IGNORED_FILES } from './constants';
 import { DEFAULT_LOCALIZATION } from './content/default-localization';
@@ -18,6 +19,7 @@ import { logger } from './logger';
 import { joinPaths } from './url';
 
 const CONTENT_DIR = path.join(process.cwd(), 'src/content/tutorial');
+const TEMPLATES_DIR = path.join(process.cwd(), 'src/templates');
 
 export async function getTutorial(): Promise<Tutorial> {
   const collection = sortCollection(await getCollection('tutorial'));
@@ -262,6 +264,22 @@ export async function getTutorial(): Promise<Tutorial> {
       ),
     };
 
+    if (lesson.data.template && typeof lesson.data.template !== 'string' && lesson.data.template.visibleFiles?.length) {
+      const templateFilesRef = await getFilesRefList(lesson.data.template.name, TEMPLATES_DIR);
+
+      for (const filename of templateFilesRef[1]) {
+        if (lesson.files[1].includes(filename)) {
+          continue;
+        }
+
+        if (mm.isMatch(filename, lesson.data.template.visibleFiles, { format: formatTemplateFile })) {
+          lesson.files[1].push(filename);
+        }
+      }
+
+      lesson.files[1].sort();
+    }
+
     if (prevLesson) {
       const partSlug = _tutorial.parts[prevLesson.part.id].slug;
       const chapterSlug = _tutorial.parts[prevLesson.part.id].chapters[prevLesson.chapter.id].slug;
@@ -330,8 +348,8 @@ function getSlug(entry: CollectionEntryTutorial) {
   return slug;
 }
 
-async function getFilesRefList(pathToFolder: string): Promise<FilesRefList> {
-  const root = path.join(CONTENT_DIR, pathToFolder);
+async function getFilesRefList(pathToFolder: string, base = CONTENT_DIR): Promise<FilesRefList> {
+  const root = path.join(base, pathToFolder);
 
   const filePaths = (
     await glob(`${glob.convertPathToPattern(root)}/**/*`, {
@@ -348,6 +366,15 @@ async function getFilesRefList(pathToFolder: string): Promise<FilesRefList> {
   return [filesRef, filePaths];
 }
 
+function formatTemplateFile(filename: string) {
+  // compare files without leading "/" so that patterns like ["src/index.js"] match "/src/index.js"
+  if (filename.startsWith('/')) {
+    return filename.substring(1);
+  }
+
+  return filename;
+}
+
 interface CollectionEntryTutorial {
   id: string;
   slug: string;

Diff for: packages/cli/src/commands/eject/index.ts

@@ -18,7 +18,15 @@ interface PackageJson {
 }
 
 const TUTORIALKIT_VERSION = pkg.version;
-const REQUIRED_DEPENDENCIES = ['@tutorialkit/runtime', '@webcontainer/api', 'nanostores', '@nanostores/react', 'kleur'];
+const REQUIRED_DEPENDENCIES = [
+  '@tutorialkit/runtime',
+  '@webcontainer/api',
+  'nanostores',
+  '@nanostores/react',
+  'kleur',
+  'micromatch',
+  '@types/micromatch',
+];
 
 export function ejectRoutes(flags: Arguments) {
   if (flags._[1] === 'help' || flags.help || flags.h) {
@@ -104,6 +112,7 @@ async function _eject(flags: EjectOptions) {
   for (const dep of REQUIRED_DEPENDENCIES) {
     if (!(dep in pkgJson.dependencies) && !(dep in pkgJson.devDependencies)) {
       pkgJson.dependencies[dep] = astroIntegrationPkgJson.dependencies[dep];
+      pkgJson.devDependencies[dep] = astroIntegrationPkgJson.devDependencies[dep];
 
       newDependencies.push(dep);
     }

Diff for: packages/cli/tests/__snapshots__/create-tutorial.test.ts.snap

@@ -75,6 +75,7 @@ exports[`create a project 1`] = `
   "src/templates/default/package.json",
   "src/templates/default/src",
   "src/templates/default/src/index.js",
+  "src/templates/default/src/template-only-file.js",
   "src/templates/vite-app",
   "src/templates/vite-app-2",
   "src/templates/vite-app-2/.tk-config.json",
@@ -233,6 +234,7 @@ exports[`create and eject a project 1`] = `
   "src/templates/default/package.json",
   "src/templates/default/src",
   "src/templates/default/src/index.js",
+  "src/templates/default/src/template-only-file.js",
   "src/templates/vite-app",
   "src/templates/vite-app-2",
   "src/templates/vite-app-2/.tk-config.json",

Diff for: packages/runtime/src/store/index.ts

@@ -42,10 +42,18 @@ export class TutorialStore {
   private _ref: number = 1;
   private _themeRef = atom(1);
 
+  /** Files from lesson's `_files` directory */
   private _lessonFiles: Files | undefined;
+
+  /** Files from lesson's `_solution` directory */
   private _lessonSolution: Files | undefined;
+
+  /** All files from `template` directory */
   private _lessonTemplate: Files | undefined;
 
+  /** Files from `template` directory that match `template.visibleFiles` patterns */
+  private _visibleTemplateFiles: Files | undefined;
+
   /**
    * Whether or not the current lesson is fully loaded in WebContainer
    * and in every stores.
@@ -165,15 +173,17 @@ export class TutorialStore {
 
         signal.throwIfAborted();
 
-        this._lessonTemplate = template;
         this._lessonFiles = files;
         this._lessonSolution = solution;
+        this._lessonTemplate = template;
+        this._visibleTemplateFiles = filterEntries(template, lesson.files[1]);
 
-        this._editorStore.setDocuments(files);
+        const editorFiles = { ...this._visibleTemplateFiles, ...this._lessonFiles };
+        this._editorStore.setDocuments(editorFiles);
 
         if (lesson.data.focus === undefined) {
           this._editorStore.setSelectedFile(undefined);
-        } else if (files[lesson.data.focus] !== undefined) {
+        } else if (editorFiles[lesson.data.focus] !== undefined) {
           this._editorStore.setSelectedFile(lesson.data.focus);
         }
 
@@ -279,8 +289,10 @@ export class TutorialStore {
       return;
     }
 
-    this._editorStore.setDocuments(this._lessonFiles);
-    this._runner.updateFiles(this._lessonFiles);
+    const files = { ...this._visibleTemplateFiles, ...this._lessonFiles };
+
+    this._editorStore.setDocuments(files);
+    this._runner.updateFiles(files);
   }
 
   solve() {
@@ -290,7 +302,7 @@ export class TutorialStore {
       return;
     }
 
-    const files = { ...this._lessonFiles, ...this._lessonSolution };
+    const files = { ...this._visibleTemplateFiles, ...this._lessonFiles, ...this._lessonSolution };
 
     this._editorStore.setDocuments(files);
     this._runner.updateFiles(files);
@@ -353,3 +365,7 @@ export class TutorialStore {
     this._themeRef.set(this._themeRef.get() + 1);
   }
 }
+
+function filterEntries<T extends object>(obj: T, filter: string[]) {
+  return Object.fromEntries(Object.entries(obj).filter(([entry]) => filter.includes(entry)));
+}

Diff for: packages/template/src/content/tutorial/1-basics/1-introduction/1-welcome/content.md

@@ -1,7 +1,7 @@
 ---
 type: lesson
 title: Welcome to TutorialKit
-focus: /src/index.js
+focus: /src/template-only-file.js
 previews: [8080]
 mainCommand: ['node -e setTimeout(()=>{},10_000)', 'Running dev server']
 prepareCommands:
@@ -13,6 +13,7 @@ terminal:
   panels: ['terminal', 'output']
 template:
   name: default
+  visibleFiles: ['src/template-only-file.js']
 ---
 
 # Kitchen Sink [Heading 1]

Diff for: packages/template/src/templates/default/src/template-only-file.js

@@ -0,0 +1 @@
+export default 'This file is only present in template';

Diff for: packages/types/src/schemas/common.spec.ts

@@ -358,6 +358,16 @@ describe('webcontainerSchema', () => {
     }).not.toThrow();
   });
   it('should allow specifying the template by object type', () => {
+    expect(() => {
+      webcontainerSchema.parse({
+        template: {
+          name: 'default',
+          visibleFiles: ['**/fixture.json', '*/tests/*'],
+        },
+      });
+    }).not.toThrow();
+  });
+  it('should allow specifying the template to omit visibleFiles', () => {
     expect(() => {
       webcontainerSchema.parse({
         template: {

Diff for: packages/types/src/schemas/common.ts

@@ -177,6 +177,9 @@ export const webcontainerSchema = commandsSchema.extend({
       z.strictObject({
         // name of the template
         name: z.string(),
+
+        // list of globs of files that should be visible
+        visibleFiles: z.array(z.string()).optional(),
       }),
     ])
     .describe(