feat(plugin-typescript): check workspace tsconfig.json

.yarn/versions/dca3f277.yml

@@ -0,0 +1,23 @@
+releases:
+  "@yarnpkg/cli": minor
+  "@yarnpkg/plugin-typescript": minor
+
+declined:
+  - "@yarnpkg/plugin-compat"
+  - "@yarnpkg/plugin-constraints"
+  - "@yarnpkg/plugin-dlx"
+  - "@yarnpkg/plugin-essentials"
+  - "@yarnpkg/plugin-init"
+  - "@yarnpkg/plugin-interactive-tools"
+  - "@yarnpkg/plugin-nm"
+  - "@yarnpkg/plugin-npm-cli"
+  - "@yarnpkg/plugin-pack"
+  - "@yarnpkg/plugin-patch"
+  - "@yarnpkg/plugin-pnp"
+  - "@yarnpkg/plugin-pnpm"
+  - "@yarnpkg/plugin-stage"
+  - "@yarnpkg/plugin-version"
+  - "@yarnpkg/plugin-workspace-tools"
+  - "@yarnpkg/builder"
+  - "@yarnpkg/core"
+  - "@yarnpkg/doctor"

packages/acceptance-tests/pkg-tests-specs/sources/plugins/plugin-typescript.test.ts

@@ -27,7 +27,7 @@ describe(`Plugins`, () => {
       );
 
       test(
-        `it should automatically enable automatic @types insertion when a tsconfig is detected`,
+        `it should automatically enable automatic @types insertion when a tsconfig is detected at the root of the project`,
         makeTemporaryEnv({}, async ({path, run, source}) => {
           await xfs.writeFilePromise(ppath.join(path, `tsconfig.json`), ``);
 
@@ -44,6 +44,66 @@ describe(`Plugins`, () => {
         }),
       );
 
+      test(
+        `it should automatically enable automatic @types insertion when a tsconfig is detected in the current workspace`,
+        makeTemporaryMonorepoEnv({
+          workspaces: [`packages/*`],
+        }, {[`packages/foo`]: {}}, async ({path, run, source}) => {
+          await xfs.writeFilePromise(ppath.join(path, `packages/foo/tsconfig.json`), ``);
+
+          await run(`add`, `is-number`, {
+            cwd: `${path}/packages/foo` as PortablePath,
+          });
+
+          await expect(readManifest(`${path}/packages/foo` as PortablePath)).resolves.toMatchObject({
+            dependencies: {
+              [`is-number`]: `^2.0.0`,
+            },
+            devDependencies: {
+              [`@types/is-number`]: `^2`,
+            },
+          });
+        }),
+      );
+
+      test(
+        `it should not automatically enable automatic @types insertion when a tsconfig is present in a sibling workspace`,
+        makeTemporaryMonorepoEnv({
+          workspaces: [`packages/*`],
+        }, {[`packages/foo`]: {}, [`packages/bar`]: {}}, async ({path, run, source}) => {
+          await xfs.writeFilePromise(ppath.join(path, `packages/foo/tsconfig.json`), ``);
+
+          await run(`add`, `is-number`, {
+            cwd: `${path}/packages/bar` as PortablePath,
+          });
+
+          await expect(readManifest(`${path}/packages/bar` as PortablePath)).resolves.toMatchObject({
+            dependencies: {
+              [`is-number`]: `^2.0.0`,
+            },
+          });
+        }),
+      );
+
+      test(
+        `it should not automatically enable automatic @types insertion when a tsconfig is detected in the root project of the current workspace`,
+        makeTemporaryMonorepoEnv({
+          workspaces: [`packages/*`],
+        }, {[`packages/foo`]: {}}, async ({path, run, source}) => {
+          await xfs.writeFilePromise(ppath.join(path, `tsconfig.json`), ``);
+
+          await run(`add`, `is-number`, {
+            cwd: `${path}/packages/foo` as PortablePath,
+          });
+
+          await expect(readManifest(`${path}/packages/foo` as PortablePath)).resolves.toMatchObject({
+            dependencies: {
+              [`is-number`]: `^2.0.0`,
+            },
+          });
+        }),
+      );
+
       test(
         `it should automatically add @types to devDependencies when package doesn't provide types`,
         makeTemporaryEnv({}, {

packages/docusaurus/static/configuration/yarnrc.json

@@ -835,7 +835,7 @@
     "tsEnableAutoTypes": {
       "_package": "@yarnpkg/plugin-typescript",
       "title": "Define whether to automatically install @types dependencies.",
-      "description": "If true, Yarn will automatically add `@types` dependencies when running `yarn add` with packages that don't provide their own typings (as reported by the Algolia npm database). This behavior is enabled by default if you have a tsconfig file at the root of your project.",
+      "description": "If true, Yarn will automatically add `@types` dependencies when running `yarn add` with packages that don't provide their own typings (as reported by the Algolia npm database). This behavior is enabled by default if you have a tsconfig.json file at the root of your project, or in your current workspace.",
       "type": "boolean",
       "examples": [true]
     },

packages/plugin-typescript/README.md

@@ -9,6 +9,10 @@
 
 This plugin is included by default starting from Yarn 4.
 
+## Configuration
+
+This plugin is enabled by default if you have a `tsconfig.json` file at the root of your project, or in your current workspace. See [`tsEnableAutoTypes`](https://yarnpkg.com/configuration/yarnrc#tsEnableAutoTypes) for more information.
+
 ## Example
 
 ```

packages/plugin-typescript/sources/index.ts

@@ -27,6 +27,7 @@ const afterWorkspaceDependencyAddition = async (
   const {configuration} = project;
 
   const tsEnableAutoTypes = configuration.get(`tsEnableAutoTypes`)
+    ?? xfs.existsSync(ppath.join(workspace.cwd, `tsconfig.json`))
     ?? xfs.existsSync(ppath.join(project.cwd, `tsconfig.json`));
 
   if (!tsEnableAutoTypes)