build: Overhaul build & deployment workflow (#3267)

* Fixes #3250

* build: Overhaul build & deployment workflow

- Move to release drafter
- Replace publishing with gradle nexus
- Conventional commits are handy
- Determine build status in gh actions before deploying

.github/release-drafter.yml

@@ -0,0 +1,20 @@
+categories:
+  - title: '🐛 Fixes'
+    label: 'Bugfix'
+  - title: '✨ Features'
+    label: 'Feature'
+  - title: '🧭 Changes'
+    label: 'Enhancement'
+  - title: '📦 Dependency updates'
+    labels:
+      - 'Renovate'
+      - 'Dependency updates'
+change-template: '- $TITLE @$AUTHOR (#$NUMBER)'
+change-title-escapes: '\<*_&@'
+exclude-contributors:
+  - 'renovate'
+  - 'renovate-bot'
+template: |
+  ## PlotSquared v6.
+
+  $CHANGES

.github/workflows/build.yml

@@ -1,6 +1,6 @@
 name: "build"
 
-on: ["pull_request", "push"]
+on: [ "pull_request", "push" ]
 
 jobs:
   build:
@@ -8,6 +8,8 @@ jobs:
     steps:
       - name: "Checkout Repository"
         uses: "actions/checkout@v2.3.4"
+      - name: "Validate Gradle Wrapper"
+        uses: "gradle/wrapper-validation-action@v1.0.4"
       - name: "Setup JDK 16"
         uses: "actions/setup-java@v2.2.0"
         with:
@@ -15,3 +17,25 @@ jobs:
           java-version: "16"
       - name: "Clean Build"
         run: "./gradlew clean build"
+      - name: "Determine release status"
+        if: "${{ runner.os == 'Linux' }}"
+        run: |
+          if [ "$(./gradlew properties | awk '/^version:/ { print $2; }' | grep '\-SNAPSHOT')" ]; then
+            echo "STATUS=snapshot" >> $GITHUB_ENV
+          else
+            echo "STATUS=release" >> $GITHUB_ENV
+          fi
+      - name: "Publish Release"
+        if: "${{ runner.os == 'Linux' && env.STATUS == 'release' && github.event_name == 'push' && github.ref == 'refs/heads/v6'}}"
+        run: "./gradlew publishToSonatype closeSonatypeStagingRepository"
+        env:
+          ORG_GRADLE_PROJECT_sonatypeUsername: "${{ secrets.SONATYPE_USERNAME }}"
+          ORG_GRADLE_PROJECT_sonatypePassword: "${{ secrets.SONATYPE_PASSWORD }}"
+          ORG_GRADLE_PROJECT_signingKey: "${{ secrets.SIGNING_KEY }}"
+          ORG_GRADLE_PROJECT_signingPassword: "${{ secrets.SIGNING_PASSWORD }}"
+      - name: "Publish Snapshot"
+        if: "${{ runner.os == 'Linux' && env.STATUS != 'release' && github.event_name == 'push' && github.ref == 'refs/heads/v6' }}"
+        run: "./gradlew publishToSonatype"
+        env:
+          ORG_GRADLE_PROJECT_sonatypeUsername: "${{ secrets.SONATYPE_USERNAME }}"
+          ORG_GRADLE_PROJECT_sonatypePassword: "${{ secrets.SONATYPE_PASSWORD }}"

.github/workflows/release-drafter.yml

@@ -0,0 +1,14 @@
+name: "draft release"
+
+on:
+  push:
+    branches:
+      - v6
+
+jobs:
+  update_release_draft:
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: "release-drafter/release-drafter@v5.15.0"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/validate-gradle-wrapper.yml

@@ -1,12 +0,0 @@
-name: "validate gradle wrapper"
-
-on: ["pull_request", "push"]
-
-jobs:
-  build:
-    runs-on: "ubuntu-20.04"
-    steps:
-      - name: "Checkout Repository"
-        uses: "actions/checkout@v2.3.4"
-      - name: "Validate Gradle Wrapper"
-        uses: "gradle/wrapper-validation-action@v1.0.4"