Update Actions caching and add workflow to validate Gradle wrapper (#754)

.github/checksum.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+RESULT_FILE=$1
+
+if [ -f $RESULT_FILE ]; then
+  rm $RESULT_FILE
+fi
+touch $RESULT_FILE
+
+checksum_file() {
+  echo $(sha256sum $1 | awk '{print $1}')
+}
+
+FILES=()
+while read -r -d ''; do
+	FILES+=("$REPLY")
+done < <(find . -type f \( -name "build.gradle*" -o -name "dependencies.gradle" -o -name "gradle-wrapper.properties" \) -print0)
+
+# Loop through files and append MD5 to result file
+for FILE in ${FILES[@]}; do
+	echo $(checksum_file $FILE) >> $RESULT_FILE
+done
+# Now sort the file so that it is
+sort $RESULT_FILE -o $RESULT_FILE

.github/workflows/branch_deploy.yml

@@ -20,10 +20,32 @@ jobs:
     - name: Copy CI gradle.properties
       run: mkdir -p ~/.gradle ; cp .github/ci-gradle.properties ~/.gradle/gradle.properties
 
-    - uses: actions/cache@v1
+    - name: Generate cache key
+      run: ./.github/checksum.sh checksum.txt
+
+    - name: Cache gradle modules
+      uses: actions/cache@v1
       with:
-          path: ~/.gradle/caches
-          key: gradle-${{ runner.os }}-${{ hashFiles('**/build.gradle') }}-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}-${{ hashFiles('**/dependencies.gradle') }}
+        path: ~/.gradle/caches/modules-2
+        key: ${{ runner.os }}-gradlemodules-${{ hashFiles('checksum.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-gradlemodules-
+
+    - name: Cache gradle jars
+      uses: actions/cache@v1
+      with:
+        path: ~/.gradle/caches/jars-3
+        key: ${{ runner.os }}-gradlejars-${{ hashFiles('checksum.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-gradlejars-
+
+    - name: Cache gradle build
+      uses: actions/cache@v1
+      with:
+        path: ~/.gradle/caches/build-cache-1
+        key: ${{ runner.os }}-gradlebuildcache-${{ hashFiles('checksum.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-gradlebuildcache-
 
     - name: Download gradle dependencies
       run: ./gradlew dependencies

.github/workflows/pull_request.yml

@@ -15,10 +15,32 @@ jobs:
     - name: Copy CI gradle.properties
       run: mkdir -p ~/.gradle ; cp .github/ci-gradle.properties ~/.gradle/gradle.properties
 
-    - uses: actions/cache@v1
+    - name: Generate cache key
+      run: ./.github/checksum.sh checksum.txt
+
+    - name: Cache gradle modules
+      uses: actions/cache@v1
       with:
-          path: ~/.gradle/caches
-          key: gradle-${{ runner.os }}-${{ hashFiles('**/build.gradle') }}-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}-${{ hashFiles('**/dependencies.gradle') }}
+        path: ~/.gradle/caches/modules-2
+        key: ${{ runner.os }}-gradlemodules-${{ hashFiles('checksum.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-gradlemodules-
+
+    - name: Cache gradle jars
+      uses: actions/cache@v1
+      with:
+        path: ~/.gradle/caches/jars-3
+        key: ${{ runner.os }}-gradlejars-${{ hashFiles('checksum.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-gradlejars-
+
+    - name: Cache gradle build
+      uses: actions/cache@v1
+      with:
+        path: ~/.gradle/caches/build-cache-1
+        key: ${{ runner.os }}-gradlebuildcache-${{ hashFiles('checksum.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-gradlebuildcache-
 
     - name: Run unit tests
       run: ./gradlew spotlessCheck test${{ matrix.variant }} lint${{ matrix.variant}} -Dpre-dex=false

.github/workflows/validate_wrapper.yml

@@ -0,0 +1,10 @@
+name: "Validate Gradle Wrapper"
+on: pull_request
+
+jobs:
+  validation:
+    name: "Wrapper validation"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: gradle/wrapper-validation-action@v1