Drop support for yarn@1, set packageManager field in package.json (pnpm 9.x, npm 11.x) (#322)

* Drop support for yarn@1, set packageManager field in package.json (pnpm 9.x, yarn 4.x, npm 11.x)

* Set yarn version

* Error when passing --yarn

* set yarn to false

* Remove yarn from ci

* ope

Author: NullVoxPopuli

.github/workflows/ci.yml

@@ -73,7 +73,6 @@ jobs:
 
           # existing monorepo
           - monorepo with npm
-          - monorepo with yarn
           - monorepo with pnpm
 
           # build-only tests for testing if the rollup config works at all
@@ -104,7 +103,6 @@ jobs:
       matrix:
         slow-test:
           - defaults with npm
-          - defaults with yarn
           - defaults with pnpm
     steps:
       - uses: actions/checkout@v4
@@ -129,7 +127,6 @@ jobs:
       matrix:
         slow-test:
           - typescript with npm
-          - typescript with yarn
           - typescript with pnpm
     steps:
       - uses: actions/checkout@v4

files/package.json

@@ -4,6 +4,7 @@
   "license": "MIT",
   "author": "",
   "scripts": {},
+  "packageManager": "<%= pnpm ? 'pnpm@10.0.0' : 'npm@11.0.0' %>",
   "devDependencies": {<% if (typescript) { %>
     "@glint/core": "^1.2.1",<% } %>
     "concurrently": "^8.2.0",

index.js

@@ -273,6 +273,12 @@ module.exports = {
       .map(() => '..')
       .join('/');
 
+    if (isYarn(options)) {
+      throw new Error(
+        `Please do not generate this project with --yarn. Omit '--yarn' when generating this blueprint'`,
+      );
+    }
+
     return {
       rootDirectory: directoryForPackageName(addonInfo.name.raw),
       addonInfo,
@@ -282,7 +288,7 @@ module.exports = {
       blueprintVersion: require('./package.json').version,
       year: date.getFullYear(),
       packageManager: options.packageManager,
-      yarn: isYarn(options),
+      yarn: false,
       pnpm: isPnpm(options),
       npm: isNpm(options),
       typescript: options.typescript,
@@ -292,11 +298,11 @@ module.exports = {
         [`--addon-location=${options.addonLocation}`]: options.addonLocation,
         [`--ci-provider=${options.ciProvider}`]: options.ciProvider,
         '--pnpm': isPnpm(options),
+        '--npm': isNpm(options),
         '--release-it': options.releaseIt,
         [`--test-app-location=${options.testAppLocation}`]: options.testAppLocation,
         [`--test-app-name=${options.testAppName}`]: options.testAppName,
         '--typescript': options.typescript,
-        '--yarn': isYarn(options),
       }),
       ciProvider: options.ciProvider,
       pathFromAddonToRoot,