Setup Changesets automatic publishing PRs

.github/workflows/release.yml

@@ -0,0 +1,52 @@
+name: Changelog
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  release:
+    name: Changelog
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out branch
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0 # This makes Actions fetch all Git history so that Changesets can generate changelogs with the correct commits
+
+      - name: Set up Node.js 14.x
+        uses: actions/setup-node@v2
+        with:
+          node-version: 14.x
+
+      - name: Install dependencies
+        run: yarn --frozen-lockfile --ignore-engines
+        env:
+          CI: true
+
+      - name: Create Release Pull Request or Publish to npm
+        id: changesets
+        uses: changesets/action@master
+        with:
+          # This expects you to have a script called release which does a build for your packages and calls changeset publish
+          publish: yarn release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+      - name: Send a Discord notification if a publish happens
+        if: steps.changesets.outputs.published == 'true'
+        id: discord-notification
+        env:
+          DISCORD_WEBHOOK: ${{ secrets.DISCORD_WEBHOOK }}
+        uses: Ilshidur/action-discord@0.3.2
+        with:
+          args: 'A new release just went out! [Release notes →](<https://github.com/snowpackjs/prettier-plugin-astro/releases/>)'
+
+      - name: push main branch to latest branch
+        if: steps.changesets.outputs.published == 'true'
+        id: git-push-latest
+        # Note: this will fail if "latest" and "main" have different commit history,
+        # which is a good thing! Also, don't push if in pre-release mode.
+        run: '(test -f .changeset/pre.json && echo "prerelease: skip pushing to latest branch.") || git push origin main:latest'

package.json

@@ -6,6 +6,7 @@
   "private": true,
   "scripts": {
     "test": "ava test/*.test.mjs",
+    "release": "changeset publish",
     "lint": "eslint .",
     "fix": "yarn lint --fix",
     "format": "prettier -w ."