Update github actions for build and readthedocs config (#418)

This PR removes mamba with conda-incubator/setup-miniconda@v3, remove the github cache action (seems broken), and updates the readthedocs configuration. This was causing broken CI workflows

Co-authored-by: Evan Goetz <[email protected]>

.github/workflows/build.yml

@@ -53,39 +53,42 @@ jobs:
       with:
         fetch-depth: 0
 
-    - name: Cache conda packages
-      uses: actions/cache@v4
-      env:
-        # increment to reset cache
-        CACHE_NUMBER: 0
-      with:
-        path: ~/conda_pkgs_dir
-        key: ${{ runner.os }}-conda-${{ matrix.python-version }}-${{ env.CACHE_NUMBER }}
-        restore-keys: ${{ runner.os }}-conda-${{ matrix.python-version }}-
+    # EG 13 Dec 2024: commenting out broken cache
+    # - name: Cache conda packages
+    #   uses: actions/cache@v4
+    #   env:
+    #     # increment to reset cache
+    #     CACHE_NUMBER: 0
+    #   with:
+    #     path: ~/conda_pkgs_dir
+    #     key: ${{ runner.os }}-conda-${{ matrix.python-version }}-${{ env.CACHE_NUMBER }}
+    #     restore-keys: ${{ runner.os }}-conda-${{ matrix.python-version }}-
 
     - name: Configure conda
       uses: conda-incubator/setup-miniconda@v3
       with:
-        activate-environment: test
-        miniforge-variant: Mambaforge
+        auto-update-conda: true
+        channels: conda-forge
         python-version: ${{ matrix.python-version }}
-        use-mamba: true
+        # this is needed for caching to work properly:
+        # EG 13 Dec 2024: commenting out broken cache
+        # use-only-tar-bz2: true
 
     - name: Conda info
       run: conda info --all
 
     - name: Install dependencies
       run: |
         # parse requirements to install as much as possible with conda
-        mamba create --name pip2conda pip2conda
-        mamba run -n pip2conda pip2conda \
+        conda create --name pip2conda pip2conda
+        conda run -n pip2conda pip2conda \
             --all \
             --output environment.txt \
             --python-version ${{ matrix.python-version }}
         echo "-----------------"
         cat environment.txt
         echo "-----------------"
-        mamba install --quiet --yes --name test --file environment.txt
+        conda install --quiet --yes --name test --file environment.txt
 
     - name: Install GWSumm
       run: python -m pip install . --no-build-isolation -vv

.readthedocs.yaml

@@ -7,9 +7,9 @@ version: 2
 
 # Set the OS, Python version and other tools you might need
 build:
-  os: "ubuntu-22.04"
+  os: "ubuntu-24.04"
   tools:
-    python: "mambaforge-22.9"
+    python: "miniconda-latest"
 
 conda:
   environment: docs/environment.yml