Optimize CI by using a custom Docker container with pre-installed dependencies.

This change introduces a Docker container (`.ci/container/Dockerfile`) that pre-installs:
- OpenJDK 8 (ZuluFX), 11, 17, 21, and 25 (Zulu).
- Android SDK (command-line tools, platform-tools, build-tools) and NDK dependencies.
- Ant, Maven, Python 3.
- Codename One binaries (`cn1-binaries`).
- Required libraries for headless UI testing (xvfb, libgl1-mesa-dri, libncurses6).

Updates `pr.yml`, `ant.yml`, and `scripts-android.yml` to run jobs inside this container (`ghcr.io/codenameone/codenameone/ci-container:latest`), removing redundant setup steps (JDK download, tool installation) to improve build speed and reproducibility.

The workflow `.github/workflows/build-container.yml` is added to build and push this container image to GHCR, ensuring the image tag is always lowercase to comply with registry requirements.

Also updates `scripts/setup-workspace.sh` to respect the `CN1_BINARIES` environment variable and handle the pre-configured environment correctly.

Explicit `packages: read` permissions are added to `pr.yml`, `ant.yml`, and `scripts-android.yml` to allow pulling the CI container from GHCR.

Author: google-labs-jules[bot]

.github/workflows/ant.yml

@@ -7,6 +7,10 @@ on:
     paths-ignore:
       - 'CodenameOneDesigner/**'
 
+permissions:
+  contents: read
+  packages: read
+
 jobs:
   build-linux-jdk8:
 

.github/workflows/pr.yml

@@ -32,33 +32,17 @@ permissions:
   contents: write
   pull-requests: write
   issues: write
+  packages: read
 
 jobs:
-  build-test:
+  build-linux-jdk8-fx:
 
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/codenameone/codenameone/ci-container:latest
 
-    strategy:
-      fail-fast: false
-      matrix:
-        java-version: [8, 17, 21, 25]
-
     steps:
     - uses: actions/checkout@v1
-    - name: Set up JDK 8
-      if: matrix.java-version == 8
-      uses: actions/setup-java@v1
-      with:
-        java-version: 1.8
-        java-package: jdk+fx
-    - name: Set up JDK
-      if: matrix.java-version != 8
-      uses: actions/setup-java@v4
-      with:
-        distribution: 'zulu'
-        java-version: ${{ matrix.java-version }}
     - name: Cache Maven dependencies
       uses: actions/cache@v4
       with:
@@ -68,12 +52,8 @@ jobs:
           ${{ runner.os }}-m2
     - name: Run Unit Tests
       run: |
-        MVN_ARGS=""
-        if [ "${{ matrix.java-version }}" != "8" ]; then
-          MVN_ARGS="-Dspotbugs.skip=true"
-        fi
         cd maven
-        mvn clean verify -DunitTests=true -pl core-unittests -am -Dmaven.javadoc.skip=true -Plocal-dev-javase $MVN_ARGS
+        mvn clean verify -DunitTests=true -pl core-unittests -am -Dmaven.javadoc.skip=true -Plocal-dev-javase
         cd ..
     - name: Run Maven plugin tests
       working-directory: maven
@@ -86,7 +66,7 @@ jobs:
           -Dcn1.binaries="${CN1_BINARIES}" \
           -pl codenameone-maven-plugin -am -Plocal-dev-javase test
     - name: Generate static analysis HTML summaries
-      if: ${{ always() && matrix.java-version == 8 }}
+      if: ${{ always() }}
       env:
         QUALITY_REPORT_TARGET_DIRS: maven/core-unittests/target
         QUALITY_REPORT_SERVER_URL: ${{ github.server_url }}
@@ -95,7 +75,7 @@ jobs:
         QUALITY_REPORT_GENERATE_HTML_ONLY: "1"
       run: python3 .github/scripts/generate-quality-report.py
     - name: Collect quality artifacts
-      if: ${{ always() && matrix.java-version == 8 }}
+      if: ${{ always() }}
       run: |
         set -euo pipefail
         mkdir -p quality-artifacts/static-analysis
@@ -123,14 +103,14 @@ jobs:
           echo "No quality artifacts were generated." > quality-artifacts/README.txt
         fi
     - name: Upload quality artifacts
-      if: ${{ always() && matrix.java-version == 8 }}
+      if: ${{ always() }}
       id: upload-quality-artifacts
       uses: actions/upload-artifact@v4
       with:
         name: quality-artifacts
         path: quality-artifacts
     - name: Publish quality report previews
-      if: ${{ always() && matrix.java-version == 8 && github.server_url == 'https://github.com' && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) }}
+      if: ${{ always() && github.server_url == 'https://github.com' && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) }}
       id: publish-quality-previews
       env:
         GITHUB_TOKEN: ${{ github.token }}
@@ -196,7 +176,7 @@ jobs:
           echo "jacoco_url=${preview_base}/coverage/index.html" >> "$GITHUB_OUTPUT"
         fi
     - name: Generate quality report summary
-      if: ${{ always() && matrix.java-version == 8 }}
+      if: ${{ always() }}
       env:
         QUALITY_REPORT_TARGET_DIRS: maven/core-unittests/target
         QUALITY_REPORT_SERVER_URL: ${{ github.server_url }}
@@ -212,13 +192,13 @@ jobs:
         JACOCO_HTML_URL: ${{ steps.publish-quality-previews.outputs.jacoco_url }}
       run: python3 .github/scripts/generate-quality-report.py
     - name: Upload quality report summary
-      if: ${{ always() && matrix.java-version == 8 }}
+      if: ${{ always() }}
       uses: actions/upload-artifact@v4
       with:
         name: quality-report
         path: quality-report.md
     - name: Publish quality report comment
-      if: ${{ github.event_name == 'pull_request' && matrix.java-version == 8 }}
+      if: ${{ github.event_name == 'pull_request' }}
       uses: actions/github-script@v7
       with:
         script: |
@@ -229,28 +209,13 @@ jobs:
         ln -sf $CN1_BINARIES ../cn1-binaries
     - name: Build with Ant
       run: xvfb-run ant test-javase
-
     - name: Build CLDC11 JAR
-      run: |
-        ANT_OPTS_ARGS=""
-        if [ "${{ matrix.java-version }}" != "8" ]; then
-          ANT_OPTS_ARGS="-Djavac.source=1.8 -Djavac.target=1.8"
-        fi
-        ant $ANT_OPTS_ARGS -noinput -buildfile Ports/CLDC11/build.xml jar
-    - name: Build with Ant
-      run: |
-        ANT_OPTS_ARGS=""
-        if [ "${{ matrix.java-version }}" != "8" ]; then
-          ANT_OPTS_ARGS="-Djavac.source=1.8 -Djavac.target=1.8"
-        fi
-        xvfb-run ant $ANT_OPTS_ARGS test-javase
+      run: ant -noinput -buildfile Ports/CLDC11/build.xml jar
 
     - name: Build Release
-      if: matrix.java-version == 8
       run: ant -noinput -buildfile CodenameOne/build.xml weeklyLibUpdate
 
     - name: Build JavaDocs
-      if: matrix.java-version == 8
       run: |
         cd CodenameOne
         mkdir -p build
@@ -265,18 +230,12 @@ jobs:
         cd ..
 
     - name: Build iOS Port
-      run: |
-        ANT_OPTS_ARGS=""
-        if [ "${{ matrix.java-version }}" != "8" ]; then
-          ANT_OPTS_ARGS="-Djavac.source=1.8 -Djavac.target=1.8"
-        fi
-        ant $ANT_OPTS_ARGS -noinput -buildfile Ports/iOSPort/build.xml jar
+      run: ant -noinput -buildfile Ports/iOSPort/build.xml jar
 
     - name: Build iOS VM API
       run: mvn -f vm/JavaAPI/pom.xml package
 
     - name: Upload a Build Artifact
-      if: matrix.java-version == 8
       uses: actions/upload-artifact@v4
       with:
         name: JavaAPI.jar
@@ -286,41 +245,27 @@ jobs:
       run: mvn -f vm/ByteCodeTranslator/pom.xml package
 
     - name: Build CLDC 11 VM
-      run: |
-        ANT_OPTS_ARGS=""
-        if [ "${{ matrix.java-version }}" != "8" ]; then
-          ANT_OPTS_ARGS="-Djavac.source=1.8 -Djavac.target=1.8"
-        fi
-        ant $ANT_OPTS_ARGS -noinput -buildfile Ports/CLDC11/build.xml jar
+      run: ant -noinput -buildfile Ports/CLDC11/build.xml jar
 
     - name: Upload a Build Artifact
-      if: matrix.java-version == 8
       uses: actions/upload-artifact@v4
       with:
         name: ByteCodeTranslator.jar
         path: vm/ByteCodeTranslator/target/ByteCodeTranslator-1.0-SNAPSHOT.jar
 
     - name: Upload a Build Artifact
-      if: matrix.java-version == 8
       uses: actions/upload-artifact@v4
       with:
         name: CLDC11.jar
         path: Ports/CLDC11/dist/CLDC11.jar
 
     - name: Build Android Port
-      run: |
-        ANT_OPTS_ARGS=""
-        if [ "${{ matrix.java-version }}" != "8" ]; then
-          ANT_OPTS_ARGS="-Djavac.source=1.8 -Djavac.target=1.8"
-        fi
-        ant $ANT_OPTS_ARGS -noinput -buildfile Ports/Android/build.xml jar
+      run: ant -noinput -buildfile Ports/Android/build.xml jar
 
     - name: Packaging Everything
-      if: matrix.java-version == 8
       run: zip -j result.zip CodenameOne/javadocs.zip CodenameOne/dist/CodenameOne.jar CodenameOne/updatedLibs.zip Ports/JavaSE/dist/JavaSE.jar build/CodenameOneDist/CodenameOne/demos/CodenameOne_SRC.zip
 
     - name: Copying Files to Server
-      if: matrix.java-version == 8
       uses: marcodallasanta/[email protected]
       with:
         host: ${{ secrets.WP_HOST }}
@@ -329,7 +274,6 @@ jobs:
         local: result.zip
 
     - name: Upload a Build Artifact
-      if: matrix.java-version == 8
       uses: actions/upload-artifact@v4
       with:
         name: JavaSE.jar

.github/workflows/scripts-android.yml

@@ -89,6 +89,7 @@ jobs:
       contents: read
       pull-requests: write
       issues: write
+      packages: read
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/codenameone/codenameone/ci-container:latest
@@ -100,7 +101,7 @@ jobs:
       - uses: actions/checkout@v4
       - name: Set JDK_HOME
         if: matrix.id != 'default'
-        run: echo "JDK_HOME=/usr/lib/jvm/zulu-${{ matrix.java_version }}-amd64" >> $GITHUB_ENV
+        run: echo "JDK_HOME=/usr/lib/jvm/zulu${{ matrix.java_version }}-ca-amd64" >> $GITHUB_ENV
       - name: Set JDK_HOME (Default)
         if: matrix.id == 'default'
         run: echo "JDK_HOME=${JDK8_HOME}" >> $GITHUB_ENV

maven/core/pom.xml

@@ -44,25 +44,13 @@
                 <artifactId>maven-compiler-plugin</artifactId>
 
                 <configuration>
-                    <source>${maven.compiler.source}</source>
-                    <target>${maven.compiler.target}</target>
+                    <source>1.5</source>
+                    <target>1.5</target>
                 </configuration>
             </plugin>
         </plugins>
 
     </build>
-    <profiles>
-        <profile>
-            <id>modern-jdk</id>
-            <activation>
-                <jdk>[9,)</jdk>
-            </activation>
-            <properties>
-                <maven.compiler.source>1.8</maven.compiler.source>
-                <maven.compiler.target>1.8</maven.compiler.target>
-            </properties>
-        </profile>
-    </profiles>
 
 
 </project>

maven/parparvm/pom.xml

@@ -43,8 +43,6 @@
         <src.dir>../../vm/ByteCodeTranslator/src</src.dir>
 
         <codename1.javaapi.src.dir>../../vm/JavaAPI/src</codename1.javaapi.src.dir>
-        <javaapi.compiler.source>1.5</javaapi.compiler.source>
-        <javaapi.compiler.target>1.5</javaapi.compiler.target>
 
     </properties>
 
@@ -87,6 +85,15 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-antrun-plugin</artifactId>
+                <dependencies>
+                    <dependency>
+                        <groupId>com.sun</groupId>
+                        <artifactId>tools</artifactId>
+                        <version>1.5.0</version>
+                        <scope>system</scope>
+                        <systemPath>${java.home}/../lib/tools.jar</systemPath>
+                    </dependency>
+                </dependencies>
                 <executions>
                     <execution>
                         <id>compile-java-api</id>
@@ -98,8 +105,8 @@
                             <target>
                                 <mkdir dir="${project.build.directory}/api-classes"/>
                                 <javac srcdir="${codename1.javaapi.src.dir}"
-                                       source="${javaapi.compiler.source}"
-                                       target="${javaapi.compiler.target}"
+                                       source="1.5"
+                                       target="1.5"
                                        destdir="${project.build.directory}/api-classes"
                                        failonerror="true"
                                 />
@@ -153,40 +160,5 @@
         </plugins>
     </build>
 
-    <profiles>
-        <profile>
-            <id>legacy-jdk-tools</id>
-            <activation>
-                <jdk>(,9)</jdk>
-            </activation>
-            <build>
-                <plugins>
-                    <plugin>
-                        <groupId>org.apache.maven.plugins</groupId>
-                        <artifactId>maven-antrun-plugin</artifactId>
-                        <dependencies>
-                            <dependency>
-                                <groupId>com.sun</groupId>
-                                <artifactId>tools</artifactId>
-                                <version>1.5.0</version>
-                                <scope>system</scope>
-                                <systemPath>${java.home}/../lib/tools.jar</systemPath>
-                            </dependency>
-                        </dependencies>
-                    </plugin>
-                </plugins>
-            </build>
-        </profile>
-        <profile>
-            <id>modern-jdk</id>
-            <activation>
-                <jdk>[9,)</jdk>
-            </activation>
-            <properties>
-                <javaapi.compiler.source>1.8</javaapi.compiler.source>
-                <javaapi.compiler.target>1.8</javaapi.compiler.target>
-            </properties>
-        </profile>
-    </profiles>
 
 </project>

vm/ByteCodeTranslator/nbproject/project.properties

@@ -29,9 +29,9 @@ dist.jar=${dist.dir}/ByteCodeTranslator.jar
 dist.javadoc.dir=${dist.dir}/javadoc
 endorsed.classpath=
 excludes=
-file.reference.asm-9.8.jar=../../../cn1-binaries/vm/asm-9.8.jar
-file.reference.asm-commons-9.8.jar=../../../cn1-binaries/vm/asm-commons-9.8.jar
-file.reference.asm-tree-9.8.jar=../../../cn1-binaries/vm/asm-tree-9.8.jar
+file.reference.asm-5.0.3.jar=../../../cn1-binaries/vm/asm-9.8.jar
+file.reference.asm-commons-5.0.3.jar=../../../cn1-binaries/vm/asm-commons-9.8.jar
+file.reference.asm-tree-5.0.3.jar=../../../cn1-binaries/vm/asm-tree-9.8.jar
 includes=**
 jar.compress=false
 javac.classpath=\