Merge 3236e58 into e2df1b9

.github/workflows/CI.yml

@@ -143,6 +143,9 @@ jobs:
         with:
           auto-update-conda: true
           python-version: ${{ matrix.python-version }}
+          mamba-version: "*"
+          channels: conda-forge,defaults
+          channel-priority: true
           activate-environment: elephant
           environment-file: requirements/environment-tests.yml
           auto-activate-base: false
@@ -152,10 +155,9 @@ jobs:
         shell: bash -l {0}
         run: |
           python --version
-          conda env list
-          conda install mpi4py openmpi
-          conda install pytest
-          conda install pytest-cov coveralls
+          mamba install mpi4py openmpi
+          mamba install pytest
+          mamba install pytest-cov coveralls
           pip install -e .[extras]
 
       - name: List packages
@@ -379,11 +381,6 @@ jobs:
 
       - uses: actions/checkout@v3
 
-      - name: Add conda to system path
-        run: |
-          # $CONDA is an environment variable pointing to the root of the miniconda directory
-          echo $CONDA/bin >> $GITHUB_PATH
-
       - name: Cache pip
         uses: actions/cache@v3
         with:
@@ -392,15 +389,22 @@ jobs:
           key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements-docs.txt') }}-${{ hashFiles('**/requirements-tutorials.txt') }}-${{ hashFiles('**/environment-docs.yml') }}
            -${{ hashFiles('**/CI.yml') }}-${{ steps.date.outputs.date }}
 
+      - uses: conda-incubator/setup-miniconda@3b0f2504dd76ef23b6d31f291f4913fb60ab5ff3 # corresponds to v2.2.0
+        with:
+          auto-update-conda: true
+          python-version: 3.9
+          activate-environment: elephant
+          environment-file: requirements/environment.yml
+          auto-activate-base: false
+          use-only-tar-bz2: true # IMPORTANT: This needs to be set for caching to work properly!
+
       - name: Install dependencies
+        shell: bash -l {0}
         run: |
-          conda config --add channels conda-forge # bugfix with scipy==1.8.1: libstdcxx-ng 12.1.0 required
           sudo apt-get update
           sudo apt install -y libopenmpi-dev openmpi-bin
-          conda update conda
-          conda install -c conda-forge openmpi pandoc libstdcxx-ng # fix libstdc++.so.6: version for new scipy versions > 1.9.1
-          conda env update --file requirements/environment-docs.yml --name base
-          activate base
+          
+          conda install -c conda-forge openmpi pandoc
           python -m pip install --upgrade pip
           pip install -r requirements/requirements-docs.txt
           pip install -r requirements/requirements-tutorials.txt
@@ -409,15 +413,15 @@ jobs:
           sed -i -E "s/nbsphinx_execute *=.*/nbsphinx_execute = 'always'/g" doc/conf.py
 
       - name: List packages
+        shell: bash -l {0}
         run: |
-          activate base
           pip list
           conda list
           python --version
 
       - name: make html
+        shell: bash -l {0}
         run: |
-          activate base
           cd doc
           make html