Add message about mambaforge sunsetting

ubuntu/Dockerfile

@@ -35,7 +35,13 @@ RUN apt-get update > /dev/null && \
     find ${CONDA_DIR} -follow -type f -name '*.pyc' -delete && \
     conda clean --force-pkgs-dirs --all --yes  && \
     echo ". ${CONDA_DIR}/etc/profile.d/conda.sh && conda activate base" >> /etc/skel/.bashrc && \
-    echo ". ${CONDA_DIR}/etc/profile.d/conda.sh && conda activate base" >> ~/.bashrc
+    echo ". ${CONDA_DIR}/etc/profile.d/conda.sh && conda activate base" >> ~/.bashrc && \
+    if [ ${MINIFORGE_NAME} = "Mambaforge"* ]; then \
+        echo '. ${CONDA_DIR}/etc/.mambaforge_deprecation.sh' >> /etc/skel/.bashrc && \
+        echo '. ${CONDA_DIR}/etc/.mambaforge_deprecation.sh' >> ~/.bashrc; \
+    fi
+
+COPY ubuntu/mambaforge_deprecation.sh ${CONDA_DIR}/etc/.mambaforge_deprecation.sh
 
 ENTRYPOINT ["tini", "--"]
 CMD [ "/bin/bash" ]

ubuntu/mambaforge_deprecation.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+if [[ "$GITHUB_ACTIONS" == "true" ]]; then
+    echo "::warning title=Mambaforge is now deprecated!::Future Miniforge releases will NOT build Mambaforge installers. We advise you switch to Miniforge at your earliest convenience. More details at https://conda-forge.org/news/2024/07/29/sunsetting-mambaforge/."
+else
+    echo "!!!!!! Mambaforge is now deprecated !!!!!"
+    echo "Future Miniforge releases will NOT build Mambaforge installers."
+    echo "We advise you switch to Miniforge at your earliest convenience."
+    echo "More details at https://conda-forge.org/news/2024/07/29/sunsetting-mambaforge/."
+fi
+
+case $(date +%F) in 
+    # Brownouts
+    2024-10-01|2024-10-15|2024-11-01|2024-11-10|2024-11-20|2024-11-30|2024-12-05|2024-12-10|2024-12-15|2024-12-20|2024-12-25|2024-12-30|2024-12-31|2025-*)
+        exit 1
+    ;;
+    *)
+        echo "Sleeping for 30s..."
+        sleep 30
+    ;;
+esac