Fix caching of conda environment (#794)

Author: dokempf

.github/workflows/ci.yml

@@ -43,25 +43,30 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Restore conda environment cache
-        id: conda-cache
-        uses: actions/cache@v4
-        with:
-          path: ${{ env.CONDA_INSTALL_DIR }}
-          key: conda-${{ runner.os }}-py${{ matrix.python }}-${{ hashFiles('environment-dev.yml') }}
-
-      - name: Create Helios dev environment
+      - name: Setup Miniconda
         uses: conda-incubator/setup-miniconda@v3
         with:
           installation-dir: ${{ env.CONDA_INSTALL_DIR }}
           auto-update-conda: true
           conda-remove-defaults: true
+          channels: conda-forge
           auto-activate: false
           activate-environment: helios-dev
-          environment-file: environment-dev.yml
           python-version: ${{ matrix.python }}
           miniconda-version: "latest"
 
+      - name: Restore conda environment cache
+        id: conda-cache
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.CONDA_INSTALL_DIR }}/envs/helios-dev
+          key: conda-env-v2-${{ runner.os }}-py${{ matrix.python }}-${{ hashFiles('environment-dev.yml') }}
+
+      - name: Create Helios dev environment
+        if: steps.conda-cache.outputs.cache-hit != 'true'
+        run: |
+          conda env update -n helios-dev -f environment-dev.yml --prune || conda env create -n helios-dev -f environment-dev.yml
+
       - name: Install Conda GCC
         if: runner.os == 'Linux'
         run: |
@@ -110,25 +115,30 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Restore conda environment cache
-        id: conda-cache
-        uses: actions/cache@v4
-        with:
-          path: ${{ env.CONDA_INSTALL_DIR }}
-          key: conda-${{ runner.os }}-py3.10-${{ hashFiles('environment-dev.yml') }}
-
-      - name: Create Helios dev environment
+      - name: Setup Miniconda
         uses: conda-incubator/setup-miniconda@v3
         with:
           installation-dir: ${{ env.CONDA_INSTALL_DIR }}
           auto-update-conda: true
           conda-remove-defaults: true
+          channels: conda-forge
           auto-activate: false
           activate-environment: helios-dev
-          environment-file: environment-dev.yml
           python-version: "3.10"
           miniconda-version: "latest"
 
+      - name: Restore conda environment cache
+        id: conda-cache
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.CONDA_INSTALL_DIR }}/envs/helios-dev
+          key: conda-env-v2-${{ runner.os }}-py3.10-${{ hashFiles('environment-dev.yml') }}
+
+      - name: Create Helios dev environment
+        if: steps.conda-cache.outputs.cache-hit != 'true'
+        run: |
+          conda env update -n helios-dev -f environment-dev.yml --prune || conda env create -n helios-dev -f environment-dev.yml
+
       - name: Install Conda GCC
         run: |
           conda install -y -c conda-forge gcc gxx

.github/workflows/coverage.yml

@@ -29,25 +29,30 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Restore conda environment cache
-        id: conda-cache
-        uses: actions/cache@v4
-        with:
-          path: ${{ env.CONDA_INSTALL_DIR }}
-          key: conda-${{ runner.os }}-py3.14-${{ hashFiles('environment-dev.yml') }}
-
-      - name: Create Helios dev environment
+      - name: Setup Miniconda
         uses: conda-incubator/setup-miniconda@v3
         with:
           installation-dir: ${{ env.CONDA_INSTALL_DIR }}
           auto-update-conda: true
           conda-remove-defaults: true
+          channels: conda-forge
           auto-activate: false
           activate-environment: helios-dev
-          environment-file: environment-dev.yml
           python-version: "3.14"
           miniconda-version: "latest"
 
+      - name: Restore conda environment cache
+        id: conda-cache
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.CONDA_INSTALL_DIR }}/envs/helios-dev
+          key: conda-env-v2-${{ runner.os }}-py3.14-${{ hashFiles('environment-dev.yml') }}
+
+      - name: Create Helios dev environment
+        if: steps.conda-cache.outputs.cache-hit != 'true'
+        run: |
+          conda env update -n helios-dev -f environment-dev.yml --prune || conda env create -n helios-dev -f environment-dev.yml
+
       - name: Install Conda GCC
         run: |
           conda install -y -c conda-forge gcc gxx