chore: setup changesets (#8668)

Co-authored-by: dominikg <[email protected]>

Author: benmccann

.changeset/README.md

@@ -0,0 +1,8 @@
+# Changesets
+
+Hello and welcome! This folder has been automatically generated by `@changesets/cli`, a build tool that works
+with multi-package repos, or single-package repos to help you version and publish your code. You can
+find the full documentation for it [in our repository](https://github.com/changesets/changesets)
+
+We have a quick list of common questions to get you started engaging with this project in
+[our documentation](https://github.com/changesets/changesets/blob/main/docs/common-questions.md)

.changeset/config.json

@@ -0,0 +1,11 @@
+{
+  "$schema": "https://unpkg.com/@changesets/[email protected]/schema.json",
+  "changelog": ["@svitejs/changesets-changelog-github-compact", { "repo": "sveltejs/svelte" }],
+  "commit": false,
+  "fixed": [],
+  "linked": [],
+  "access": "public",
+  "baseBranch": "version-4",
+  "bumpVersionsWithWorkspaceProtocolOnly": true,
+  "ignore": ["!(@sveltejs/*|svelte)"]
+}

.changeset/pre.json

@@ -0,0 +1,8 @@
+{
+  "mode": "pre",
+  "tag": "next",
+  "initialVersions": {
+    "svelte": "4.0.0-next.1"
+  },
+  "changesets": []
+}

.github/workflows/release.yml

@@ -0,0 +1,40 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - version-4
+
+permissions: {}
+jobs:
+  release:
+    # prevents this action from running on forks
+    if: github.repository == 'sveltejs/svelte'
+    permissions:
+      contents: write # to create release (changesets/action)
+      pull-requests: write # to create pull request (changesets/action)
+    name: Release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v3
+        with:
+          # This makes Actions fetch all Git history so that Changesets can generate changelogs with the correct commits
+          fetch-depth: 0
+      - uses: pnpm/[email protected]
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18.x
+          cache: pnpm
+
+      - run: pnpm install --frozen-lockfile
+
+      - name: Create Release Pull Request or Publish to npm
+        id: changesets
+        uses: changesets/action@v1
+        with:
+          version: pnpm changeset:version
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

package.json

@@ -9,7 +9,9 @@
     "build": "pnpm -r build",
     "check": "pnpm -r check",
     "lint": "pnpm -r lint",
-    "format": "pnpm -r format"
+    "format": "pnpm -r format",
+    "changeset:version": "changeset version && pnpm -r generate:version && git add --all",
+    "release": "changeset release"
   },
   "repository": {
     "type": "git",

packages/svelte/.gitignore

@@ -1,6 +1,5 @@
 *.map
 /src/compiler/compile/internal_exports.js
-/src/shared/version.js
 /compiler.d.ts
 /compiler.cjs
 /index.d.ts

packages/svelte/.prettierignore

@@ -12,6 +12,7 @@ src/shared/version.js
 /test/**/_actual*
 /test/**/expected*
 /test/**/_output
+/test/**/shards/*.test.js
 /types
 !rollup.config.js
 !vitest.config.js

packages/svelte/CHANGELOG.md

@@ -74,18 +74,19 @@
     "format": "prettier . --cache --plugin-search-dir=. --write",
     "check": "prettier . --cache --plugin-search-dir=. --check",
     "test": "vitest run && echo \"manually check that there are no type errors in test/types by opening the files in there\"",
-    "build": "rollup -c && npm run tsd",
-    "prepare": "npm run build",
+    "build": "rollup -c && pnpm tsd",
+    "prepare": "pnpm build",
+    "generate:version": "node ./scripts/generate-version.js",
     "dev": "rollup -cw",
     "posttest": "agadoo src/internal/index.js",
-    "prepublishOnly": "npm run lint && npm run build && npm test",
+    "prepublishOnly": "pnpm lint && pnpm build && pnpm test",
     "tsd": "node ./generate-types.js",
     "lint": "eslint \"{src,test}/**/*.{ts,js}\" --cache"
   },
   "repository": {
     "type": "git",
     "url": "https://github.com/sveltejs/svelte.git",
-    "directory":"packages/svelte"
+    "directory": "packages/svelte"
   },
   "keywords": [
     "UI",

packages/svelte/package.json

@@ -5,14 +5,10 @@ import resolve from '@rollup/plugin-node-resolve';
 import commonjs from '@rollup/plugin-commonjs';
 import json from '@rollup/plugin-json';
 
-const require = createRequire(import.meta.url);
-const pkg = JSON.parse(fs.readFileSync('package.json', 'utf-8'));
+// runs the version generation as a side-effect of importing
+import './scripts/generate-version.js';
 
-// Create auto-generated .js files
-fs.writeFileSync(
-	'./src/shared/version.js',
-	`/** @type {string} */\nexport const VERSION = '${pkg.version}';`
-);
+const require = createRequire(import.meta.url);
 
 const internal = await import('./src/runtime/internal/index.js');
 fs.writeFileSync(