ci: fix model runs

.github/workflows/test-models.yml

@@ -5,8 +5,7 @@ on:
     branches:
       - master
   pull_request:
-    branches:
-      - master
+    branches: ["*"]
   schedule:
     - cron: "0 5 * * *"
 
@@ -24,7 +23,7 @@ jobs:
       matrix:
         version:
           - master
-        # - latest # Activate when v0.14.0 is released
+        # - latest
 
     defaults:
       run:
@@ -43,6 +42,18 @@ jobs:
           latest_tag=$(git describe --tags `git rev-list --tags --max-count=1`)
           git checkout $latest_tag
 
+      - name: Setup Pixi
+        uses: prefix-dev/setup-pixi@v0.9.6
+        with:
+          pixi-version: v0.68.1
+          cache: true
+          # Do not cache in branches
+          cache-write: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
+
+      - name: Setup cache keys
+        run: |
+          echo "WEEK=$(date +'%Y%U')" >> $GITHUB_ENV # data and cutouts
+
       # Only run check if package is not pinned
       - name: Check if inhouse package is pinned
         run: |
@@ -87,17 +98,20 @@ jobs:
       - name: Install package from ref
         if: env.pinned == 'false'
         run: |
-          python -m pip install git+https://github.com/${{ github.repository }}@${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
+          pixi remove pypsa
+          pixi remove linopy
+          pixi add --pypi --git https://github.com/${{ github.repository }}.git ${{ github.event.repository.name }} --rev ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
+          pixi add --pypi pypsa
 
       - name: Run snakemake test workflows
         if: env.pinned == 'false'
         run: |
-          make test
+          pixi run integration-tests
 
       - name: Run unit tests
         if: env.pinned == 'false'
         run: |
-          make unit-test
+          pixi run unit-tests
 
       - name: Upload artifacts
         if: env.pinned == 'false'
@@ -109,3 +123,7 @@ jobs:
             .snakemake/log
             results
           retention-days: 3
+
+      - name: Show remaining disk space
+        if: always()
+        run: df -h