anchor.diff:      ls -l $ANDROID_HOME/ndk/*
   
   RUN du -sh $ANDROID_HOME
  -
  -RUN echo "kotlin & gradle" && \
  -    wget --quiet -O sdk.install.sh "https://get.sdkman.io" && \
  -    bash -c "bash ./sdk.install.sh > /dev/null && source ~/.sdkman/bin/sdkman-init.sh && sdk install kotlin && sdk install gradle 7.2" && \
  -    rm -f sdk.install.sh
   
   RUN echo "Flutter sdk" && \
       if [ "$(uname -m)" != "x86_64" ]; then echo "Flutter only support Linux x86 64bit. skip for $(uname -m)"; exit 0; fi && \
  
positive.code:         "platforms;android-29" \
          "platforms;android-28" \
          "platforms;android-27" \
          "platforms;android-26" \
          "platforms;android-25" > /dev/null
  
  RUN echo "platform tools" && \
      . /etc/jdk.env && \
      yes | "$ANDROID_HOME"/tools/bin/sdkmanager \
          "platform-tools" > /dev/null
  
  RUN echo "build tools 25-30" && \
      . /etc/jdk.env && \
      yes | "$ANDROID_HOME"/tools/bin/sdkmanager \
          "build-tools;31.0.0" \
  
negative.code:         "build-tools;29.0.3" "build-tools;29.0.2" \
          "build-tools;28.0.3" "build-tools;28.0.2" \
          "build-tools;27.0.3" "build-tools;27.0.2" "build-tools;27.0.1" \
          "build-tools;26.0.2" "build-tools;26.0.1" "build-tools;26.0.0" > /dev/null
  
  # seems there is no emulator on arm64
  # Warning: Failed to find package emulator
  