Add warnings to deprecate Mambaforge

.github/workflows/ci.yml

@@ -195,6 +195,17 @@ jobs:
           miniforge-variant: Mambaforge
           use-mamba: true
         if: ${{ ! contains(matrix.OS_NAME, 'Linux') }}
+
+      - name: Patch license for Mambaforge deprecation
+        if: matrix.MINIFORGE_NAME == 'Mambaforge' || matrix.MINIFORGE_NAME == 'Mambaforge-pypy3'
+        run: |
+          echo "!!!!!! Mambaforge is now deprecated !!!!!" > Miniforge3/MAMBAFORGE_LICENSE.txt
+          echo "Future Miniforge releases will NOT build Mambaforge installers." >> Miniforge3/MAMBAFORGE_LICENSE.txt
+          echo "We advise you switch to Miniforge at your earliest convenience." >> Miniforge3/MAMBAFORGE_LICENSE.txt
+          echo "More details at https://conda-forge.org/news/2024/07/29/sunsetting-mambaforge/." >> Miniforge3/MAMBAFORGE_LICENSE.txt
+          echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" >> Miniforge3/MAMBAFORGE_LICENSE.txt
+          cat LICENSE >> Miniforge3/MAMBAFORGE_LICENSE.txt
+          echo "MINIFORGE_LICENSE_OVERRIDE=MAMBAFORGE_LICENSE.txt" >> $GITHUB_ENV
 
       - name: Build and test miniforge
         env:

Miniforge3/construct.yaml

@@ -17,7 +17,7 @@ write_condarc: True
 # keep pkgs for space-saving implications for hardlinks when create new environments
 # and keep the same with Miniconda
 keep_pkgs: True
-license_file: ../LICENSE
+license_file: {{ os.environ.get("MINIFORGE_LICENSE_OVERRIDE", "../LICENSE") }}
 
 # During the interactive installation, these variables are checked.
 # During batch installation, conda is never initialized
@@ -48,3 +48,6 @@ specs:
 
   - pip
   - miniforge_console_shortcut 1.*  # [win]
+
+pre_install: mambaforge_deprecation.sh  # [unix]
+pre_install: mambaforge_deprecation.bat  # [win]

Miniforge3/mambaforge_deprecation.bat

@@ -0,0 +1,25 @@
+if "%GITHUB_ACTIONS%"=="true" (
+    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 (
+    msg "%sessionname%" 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/.
+)
+
+for /f "delims=" %%# in ('powershell get-date -format "{yyyy-MM-dd}"') do @set _date=%%#
+if "%_date%"=="2024-10-01" exit 1
+if "%_date%"=="2024-10-15" exit 1
+if "%_date%"=="2024-11-01" exit 1
+if "%_date%"=="2024-11-10" exit 1
+if "%_date%"=="2024-11-20" exit 1
+if "%_date%"=="2024-11-30" exit 1
+if "%_date%"=="2024-12-05" exit 1
+if "%_date%"=="2024-12-10" exit 1
+if "%_date%"=="2024-12-15" exit 1
+if "%_date%"=="2024-12-20" exit 1
+if "%_date%"=="2024-12-25" exit 1
+if "%_date%"=="2024-12-30" exit 1
+if "%_date%"=="2024-12-31" exit 1
+if "%_date:~0,4%"=="2025"  exit 1
+
+echo Sleeping for 30s...
+powershell -nop -c "& {sleep 30}"

Miniforge3/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

README.md

@@ -49,7 +49,9 @@ Latest installers with PyPy 3.9 in the base environment:
 | OS X    | x86_64             | macOS >= 10.13   | [Miniforge-pypy3-MacOSX-x86_64](https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge-pypy3-MacOSX-x86_64.sh) |
 | Windows | x86_64             | Windows >= 7     | [Miniforge-pypy3-Windows-x86_64](https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge-pypy3-Windows-x86_64.exe) |
 
-<details><summary>Mambaforge (Discouraged as of September 2023)</summary>
+<details>
+
+<summary>🚨 Mambaforge (<b>Deprecated</b> as of July 2024) 🚨</summary>
 
 With the [release](https://github.com/conda-forge/miniforge/releases/tag/23.3.1-0) of
 `Miniforge3-23.3.1-0`, that incorporated the changes in
@@ -58,12 +60,14 @@ configuration of `Mambaforge` and `Miniforge3` are now **identical**. The
 only difference between the two is the name of the installer and, subsequently,
 the default installation directory.
 
-Given its wide usage, there are no plans to deprecate Mambaforge. If at some
-point we decide to deprecate Mambaforge, it will be appropriately announced and
-communicated with sufficient time in advance.
+We recommend switching to `Miniforge3` immediately. These installers will be 
+retired in January 2025. To assist in the migration to Miniforge3 for CI users, we've stopped
+the latest Mambaforge (24.5+) installer from proceeding with following schedule
 
-As of September 2023, the new usage of Mambaforge is thus discouraged. Bug
-reports specific to Mambaforge will be closed as won't fix.
+* Every two weeks in October
+* Every ten days in November
+* Every five days in December
+* Never in 2025
 
 #### Mambaforge
 

build_miniforge.sh

@@ -30,7 +30,7 @@ docker run --privileged --rm tonistiigi/binfmt --install all
 
 echo "============= Build the installer ============="
 docker run --rm -v "$(pwd):/construct" \
-  -e CONSTRUCT_ROOT -e MINIFORGE_VERSION -e MINIFORGE_NAME -e TARGET_PLATFORM \
+  -e CONSTRUCT_ROOT -e MINIFORGE_VERSION -e MINIFORGE_NAME -e TARGET_PLATFORM -e MINIFORGE_LICENSE_OVERRIDE \
   "${DOCKERIMAGE}" /construct/scripts/build.sh
 
 echo "============= Test the installer ============="