Prototype Multiple Classrooms UI

.bazelrc

@@ -1,10 +1,11 @@
 # Configurations for arguments that should automatically be added to Bazel commands.
 build --android_databinding_use_v3_4_args \
     --experimental_android_databinding_v2 \
-    --java_header_compilation=false \
-    --noincremental_dexing \
-    --define=android_standalone_dexing_tool=d8_compat_dx \
     --android_databinding_use_androidx
 
+# Ensure all built Java files treat warnings as errors (similar to the Kotlin configuration) to help
+# reduce code smell & potential bugs during development.
+build --javacopt="-Werror"
+
 # Show all test output by default (for better debugging).
 test --test_output=all

.bazelversion

@@ -1 +1 @@
-4.0.0
+6.5.0

.github/CODEOWNERS

@@ -250,6 +250,7 @@ WORKSPACE @oppia/android-app-infrastructure-reviewers
 .bazelrc @oppia/android-app-infrastructure-reviewers
 .bazelversion @oppia/android-app-infrastructure-reviewers
 /tools/android/ @oppia/android-app-infrastructure-reviewers
+/tools/kotlin/ @oppia/android-app-infrastructure-reviewers
 
 # Configurations for Bazel-built Android App Bundles.
 /bundle_config.pb.json @oppia/android-dev-workflow-reviewers

.github/actions/set-up-android-bazel-build-environment/action.yml

@@ -1,7 +1,7 @@
 # Contains common operations to set up a hermetic Android + Bazel build environment for Oppia
 # Android CI workflows. Action prerequisites:
-# - JDK 9 must be installed & set as the default version via JAVA_HOME
-# - Bazel must be installed, in the path, and be version 4.0.0
+# - JDK 11 must be installed & set as the default version via JAVA_HOME
+# - Bazel must be installed, in the path, and be version 6.5.0
 
 # TODO(#1861): Revert SDK pinning for improved CI performance once Bazel is sufficiently stable that
 # we can rely on the automatic SDK provided by GitHub's CI environment.
@@ -19,20 +19,20 @@ runs:
         $JAVA_HOME/bin/java -version
 
         # Verify that the correct version of Java is installed.
-        java -version 2>&1 | grep -q -E "1.9|9.0"
+        java -version 2>&1 | grep -q -E "11.0"
         HAS_CORRECT_JAVA_VERSION=$(echo $?)
         if [[ "$HAS_CORRECT_JAVA_VERSION" == 1 ]] ; then
-          echo "Expected Java 9 to be installed"
+          echo "Expected Java 11 to be installed"
           exit 1
         fi
       shell: bash
 
     - name: Verify Bazel version
       run: |
-        bazel --version | grep -q 4.0.0
+        bazel --version | grep -q 6.5.0
         HAS_CORRECT_BAZEL_VERSION=$(echo $?)
         if [[ "$HAS_CORRECT_JAVA_VERSION" == 1 ]] ; then
-          echo "Expected Bazel 4.0.0 to be installed"
+          echo "Expected Bazel 6.5.0 to be installed"
           exit 1
         fi
       shell: bash
@@ -77,26 +77,13 @@ runs:
         $ANDROID_HOME/cmdline-tools/tools/bin/sdkmanager --install "platforms;android-33"
       shell: bash
 
-    - name: Install build tools 29.0.2
+    - name: Install build tools 32.0.0
       run: |
-        $ANDROID_HOME/cmdline-tools/tools/bin/sdkmanager --install "build-tools;29.0.2"
-      shell: bash
-
-    - name: Configure Bazel to use JDK 9 for building
-      run: |
-        echo "build --java_language_version=9" >> $HOME/.bazelrc
+        $ANDROID_HOME/cmdline-tools/tools/bin/sdkmanager --install "build-tools;32.0.0"
       shell: bash
 
     - name: Configure Bazel to use specific sandbox tmpfs
       run: |
         echo "build --enable_platform_specific_config" >> $HOME/.bazelrc
         echo "build:linux --sandbox_tmpfs_path=/tmp" >> $HOME/.bazelrc
       shell: bash
-
-    - name: Set up Oppia Bazel Android Tools
-      run: |
-        mkdir $HOME/opensource
-        cd $HOME/opensource
-        git clone https://github.com/oppia/oppia-bazel-tools
-        echo build --override_repository=android_tools="$(cd "$(dirname "$HOME/opensource/oppia-bazel-tools")"; pwd)/$(basename "$HOME/opensource/oppia-bazel-tools")" >> $HOME/.bazelrc
-      shell: bash

.github/workflows/build_tests.yml

@@ -25,15 +25,15 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Set up JDK 9
+      - name: Set up JDK 11
         uses: actions/setup-java@v1
         with:
-          java-version: 9
+          java-version: 11
 
       - name: Set up Bazel
         uses: abhinavsingh/setup-bazel@v3
         with:
-          version: 4.0.0
+          version: 6.5.0
 
       - name: Set up build environment
         uses: ./.github/actions/set-up-android-bazel-build-environment
@@ -168,15 +168,15 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Set up JDK 9
+      - name: Set up JDK 11
         uses: actions/setup-java@v1
         with:
-          java-version: 9
+          java-version: 11
 
       - name: Set up Bazel
         uses: abhinavsingh/setup-bazel@v3
         with:
-          version: 4.0.0
+          version: 6.5.0
 
       - name: Set up build environment
         uses: ./.github/actions/set-up-android-bazel-build-environment
@@ -302,15 +302,15 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Set up JDK 9
+      - name: Set up JDK 11
         uses: actions/setup-java@v1
         with:
-          java-version: 9
+          java-version: 11
 
       - name: Set up Bazel
         uses: abhinavsingh/setup-bazel@v3
         with:
-          version: 4.0.0
+          version: 6.5.0
 
       - name: Set up build environment
         uses: ./.github/actions/set-up-android-bazel-build-environment
@@ -449,15 +449,15 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Set up JDK 9
+      - name: Set up JDK 11
         uses: actions/setup-java@v1
         with:
-          java-version: 9
+          java-version: 11
 
       - name: Set up Bazel
         uses: abhinavsingh/setup-bazel@v3
         with:
-          version: 4.0.0
+          version: 6.5.0
 
       - name: Set up build environment
         uses: ./.github/actions/set-up-android-bazel-build-environment
@@ -570,15 +570,15 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Set up JDK 9
+      - name: Set up JDK 11
         uses: actions/setup-java@v1
         with:
-          java-version: 9
+          java-version: 11
 
       - name: Set up Bazel
         uses: abhinavsingh/setup-bazel@v3
         with:
-          version: 4.0.0
+          version: 6.5.0
 
       - name: Set up build environment
         uses: ./.github/actions/set-up-android-bazel-build-environment

.github/workflows/issue_checks.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Set up Bazel
         uses: abhinavsingh/setup-bazel@v3
         with:
-          version: 4.0.0
+          version: 6.5.0
 
       - name: TODO Issue Resolved Check
         id: todoIssueResolvedCheck

.github/workflows/static_checks.yml

@@ -51,11 +51,10 @@ jobs:
       - name: Create oppia android tools directory
         run: mkdir -p $HOME/oppia-android-tools
 
-      # Java 11 is specifically needed for Checkstyle.
-      - name: Set up JDK 1.11
+      - name: Set up JDK 11
         uses: actions/setup-java@v1
         with:
-          java-version: 1.11
+          java-version: 11
 
       - name: Download Checkstyle
         run: |
@@ -104,7 +103,7 @@ jobs:
       - name: Set up Bazel
         uses: abhinavsingh/setup-bazel@v3
         with:
-          version: 4.0.0
+          version: 6.5.0
 
       - uses: actions/cache@v2
         id: scripts_cache
@@ -196,7 +195,7 @@ jobs:
       - name: Set up Bazel
         uses: abhinavsingh/setup-bazel@v3
         with:
-          version: 4.0.0
+          version: 6.5.0
 
       - name: Maven Repin Check
         if: always()