internal: Automatically generate release notes (#766)

Author: xerial

.github/release.yml

@@ -0,0 +1,31 @@
+changelog:
+  categories:
+    - title: '🔥 Breaking Changes'
+      labels:
+        - 'breaking'
+    - title: '👋 Deprecated'
+      labels:
+        - 'deprecation'
+    - title: '🚀 Features'
+      labels:
+        - 'feature'
+        - 'enhancement'
+    - title: '🐛 Bug Fixes'
+      labels:
+        - 'bug'
+    - title: '🔗 Dependency Updates'
+      labels:
+        - 'library-update'
+        - 'dependencies'
+    - title: '🛠  Internal Updates'
+      labels:
+        - 'internal'
+        - 'kaizen'
+        - 'test-library-update'
+        - 'sbt-plugin-update'
+    - title: '📚 Docs'
+      labels:
+        - 'doc'
+    - title: Other Changes
+      labels:
+        - "*"

.github/workflows/release-drafter.yml

@@ -1,9 +1,6 @@
 name: Release Drafter
 
 on:
-  push:
-    branches:
-      - main
   # pull_request event is required only for autolabeler
   pull_request:
     # Only following types are handled by the action, but one can default to all as well
@@ -18,8 +15,7 @@ permissions:
 jobs:
   update_release_draft:
     permissions:
-      # write permission is required to create a github release
-      contents: write
+      contents: read
       # write permission is required for autolabeler
       # otherwise, read permission is required at least
       pull-requests: write

.github/workflows/release-note.yml

@@ -0,0 +1,18 @@
+name: Release Note
+
+on:
+  push:
+    tags:
+      - v*
+  workflow_dispatch:      
+
+jobs:
+  release:
+    name: Create a new release note
+    runs-on: ubuntu-latest
+    steps:         
+      - name: Create a release note
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh release create "$GITHUB_REF_NAME" --repo="$GITHUB_REPOSITORY" --generate-notes

README.md

@@ -96,14 +96,14 @@ Here is a list of sbt commands for daily development:
 
 ### Publish to Sonatype (Maven Central)
 
-To publish a new version, you only need to add a new git tag and push it to GitHub. GitHub Action will deploy a new release version to Maven Central (Sonatype).
+To publish a new version, add a new git tag and push it to GitHub. GitHub Action will deploy a new release version to Maven Central (Sonatype).
 
 ```scala
 $ git tag v0.x.y
 $ git push origin v0.x.y
 ```
 
-A draft of the next release note will be updated automatically at the [GitHub Releases](https://github.com/msgpack/msgpack-java/releases) page. For each PR merged, [release-drafter](https://github.com/release-drafter/release-drafter) will modify the release note draft. When you create a new release tag, edit and publish the draft of the release note. If necessary, adjust the version number and target tag.
+A new release note will be generated automatically at the [GitHub Releases](https://github.com/msgpack/msgpack-java/releases) page. 
 
 #### Publishing to Sonatype from Local Machine