Reuse conda build artifact in CI testing workflow

.github/workflows/CI.yml

@@ -20,6 +20,10 @@ jobs:
   conda-build:
     name: Conda Build
     runs-on: ubuntu-latest
+    env:
+      NAME: test-${{ github.event.repository.name }}
+    outputs:
+      artifact-name: ${{ env.NAME }}
     steps:
       - uses: actions/checkout@v4
 
@@ -35,32 +39,54 @@ jobs:
 
       - name: Run conda build
         shell: bash -el {0}
-        run: conda build . --no-anaconda-upload
+        id: build
+        run: |
+          echo "path=$(conda build . --no-anaconda-upload --output-folder=./build --output)" >> $GITHUB_OUTPUT
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: ${{ env.NAME }}
+          if-no-files-found: error
+          path: ${{ steps.build.outputs.path }}
 
   tests:
     name: Tests
     runs-on: ubuntu-latest
+    needs: conda-build
 
     # Run the job for different versions of python
     strategy:
       matrix:
         python-version: ["3.10", "3.11", "3.12"]
 
+    env:
+      ARTIFACT_LOCATION: ./conda-local
+
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
 
       - name: Checkout code
         uses: actions/[email protected]
 
+      - uses: actions/download-artifact@v4
+        with:
+          name: ${{ needs.conda-build.outputs.artifact-name }}
+          path: ${{ env.ARTIFACT_LOCATION }}
+
       - name: Setup conda environment
         uses: conda-incubator/setup-miniconda@v3
         with:
           miniconda-version: "latest"
           python-version: ${{ matrix.python-version }}
 
-      - name: Install source
+      - name: DEBUG - where are things
+        run: ls ${{ env.ARTIFACT_LOCATION }}
+
+      - name: Install conda package
         shell: bash -l {0}
-        run: python -m pip install -e .
+        run: |
+          conda index ${{ env.ARTIFACT_LOCATION }}
+          conda install -c file:///${{ env.ARTIFACT_LOCATION }} um2nc
 
       - name: List installed packages
         shell: bash -l {0}

conda/environment.yml

@@ -11,3 +11,4 @@ dependencies:
     - conda-build
     - conda-verify
     - versioneer
+    - pylint