Build system & pipeline changes (#2024)

* Build system & pipeline changes

- Updated Gradle to 7.1.1 & removed deprecations
- Added Google Maven repository & updated Dagger to 2.38
- Set new options.release parameter for submodules, allows producing Java 8 -compatible bytecode with Java 16 (also ensures that no APIs from a newer version are used)
- Updated workflows to use newer versions of checkout & setup-java
- Added a Gradle dependency cache task to workflows, allows for faster builds

* Cleanup cache after build

.github/workflows/gradle-pr.yml

@@ -21,11 +21,12 @@ jobs:
         options: --health-cmd="mysqladmin ping" --health-interval=5s --health-timeout=2s --health-retries=3
 
     steps:
-      - uses: actions/checkout@v1
-      - name: Set up JDK 1.11
-        uses: actions/setup-java@v1
+      - uses: actions/checkout@v2
+      - name: Set up JDK 1.16
+        uses: actions/setup-java@v2
         with:
-          java-version: 1.11
+          distribution: 'adopt'
+          java-version: '16'
       - name: Verify MariaDB connection
         env:
           PORT: ${{ job.services.mariadb.ports[3306] }}
@@ -33,6 +34,15 @@ jobs:
           while ! mysqladmin ping -h"127.0.0.1" -P"$PORT" --silent; do
             sleep 1
           done
+      - name: Cache Gradle packages
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
       - name: Build with Gradle
         env:
           MYSQL_DB: test
@@ -42,3 +52,9 @@ jobs:
         run: |
           cd Plan
           ./gradlew build
+      - name: Cleanup Gradle cache
+        # Remove some files from the Gradle cache, so they aren't cached by GitHub Actions.
+        # Restoring these files from a GitHub Actions cache might cause problems for future builds.
+        run: |
+          rm -f ~/.gradle/caches/modules-2/modules-2.lock
+          rm -f ~/.gradle/caches/modules-2/gc.properties

.github/workflows/gradle.yml

@@ -21,11 +21,12 @@ jobs:
         options: --health-cmd="mysqladmin ping" --health-interval=5s --health-timeout=2s --health-retries=3
 
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up JDK 1.11
-      uses: actions/setup-java@v1
+      - uses: actions/checkout@v2
+      - name: Set up JDK 1.16
+        uses: actions/setup-java@v2
         with:
-        java-version: 1.11
+          distribution: 'adopt'
+          java-version: '16'
       - name: Verify MariaDB connection
         env:
           PORT: ${{ job.services.mariadb.ports[3306] }}
@@ -33,6 +34,15 @@ jobs:
           while ! mysqladmin ping -h"127.0.0.1" -P"$PORT" --silent; do
             sleep 1
           done
+      - name: Cache Gradle packages
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
       - name: Build with Gradle
         env:
           MYSQL_DB: test

Plan/build.gradle

@@ -12,8 +12,6 @@ plugins {
     id "jacoco"
     id "checkstyle"
     id "org.sonarqube" version "3.3"
-    // id "net.ltgt.apt" version "0.21"
-    // id "net.ltgt.apt-idea" version "0.21"
 }
 
 apply plugin: 'nebula-aggregate-javadocs'
@@ -30,7 +28,6 @@ def determineBuildVersion = {
 def buildVersion = determineBuildVersion()
 
 allprojects {
-    wrapper.gradleVersion = "7.0.2"
 
     group "com.djrapitops"
     version "5.4-SNAPSHOT"
@@ -58,12 +55,13 @@ subprojects {
     apply plugin: "checkstyle"
     apply plugin: "jacoco"
 
-    sourceCompatibility = JavaVersion.VERSION_1_8
-    targetCompatibility = JavaVersion.VERSION_1_8
+    compileJava {
+        options.release = 8
+    }
 
     ext {
-        daggerVersion = "2.37"
-        daggerCompilerVersion = "2.37"
+        daggerVersion = "2.38"
+        daggerCompilerVersion = "2.38"
 
         palVersion = "5.0.0"
 
@@ -92,6 +90,7 @@ subprojects {
 
     repositories {
         mavenCentral()
+        google()
         maven { url = "https://hub.spigotmc.org/nexus/content/repositories/snapshots/" } // Spigot
         maven { url = "https://papermc.io/repo/repository/maven-public/" } // Paper
         maven { url = "https://repo.spongepowered.org/repository/maven-public/" } // Sponge
@@ -146,7 +145,7 @@ subprojects {
 
     jacocoTestReport {
         reports {
-            xml.enabled true
+            xml.required = true
             // xml.destination file("${buildDir}/jacoco/report.xml")
         }
     }

Plan/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.1.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

Plan/gradlew

@@ -72,7 +72,7 @@ case "`uname`" in
   Darwin* )
     darwin=true
     ;;
-  MINGW* )
+  MSYS* | MINGW* )
     msys=true
     ;;
   NONSTOP* )