Revert "Test installation along with build"

This reverts commit cd2432b.

Author: shsms

.github/workflows/ci.yaml

@@ -108,32 +108,81 @@ jobs:
       - name: Build the source and binary distribution
         run: python -m build
 
-      - name: Test installing wheel
-        shell: bash
-        run: |
-          python --version
-          python -m pip install dist/*.whl
-
       - name: Upload distribution files
         uses: actions/upload-artifact@v5
         with:
           name: dist-packages-${{ matrix.target }}-${{ matrix.python }}
           path: dist/
           if-no-files-found: error
 
-  # This job runs if all the `build` matrix jobs ran and succeeded.
+  test-installation:
+    name: Test package installation
+    needs: ["build"]
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - target: ubuntu-24.04
+          - target: ubuntu-24.04-arm
+          - target: windows-latest
+          - target: macos-15-intel
+          - target: macos-15
+        python:
+          - "3.11"
+          - "3.12"
+          - "3.13"
+          - "3.14"
+    runs-on: ${{ matrix.target }}
+
+    steps:
+      - name: Setup Git
+        uses: frequenz-floss/[email protected]
+
+      - name: Print environment (debug)
+        run: env
+
+      - name: Download package
+        uses: actions/download-artifact@v6
+        with:
+          name: dist-packages-${{ matrix.platform.target }}-${{ matrix.python }}
+          path: dist
+
+      # This is necessary for the `pip` caching in the setup-python action to work
+      - name: Fetch the pyproject.toml file for this action hash
+        env:
+          GH_TOKEN: ${{ github.token }}
+          REPO: ${{ github.repository }}
+          REF: ${{ github.sha }}
+        run: |
+          set -ux
+          gh api \
+              -X GET \
+              -H "Accept: application/vnd.github.raw" \
+              "/repos/$REPO/contents/pyproject.toml?ref=$REF" \
+            > pyproject.toml
+
+      - name: Setup Python
+        uses: frequenz-floss/[email protected]
+        with:
+          python-version: ${{ matrix.python }}
+          dependencies: dist/*.whl
+
+      - name: Print installed packages (debug)
+        run: python -m pip freeze
+
+  # This job runs if all the `test-installation` matrix jobs ran and succeeded.
   # It is only used to have a single job that we can require in branch
   # protection rules, so we don't have to update the protection rules each time
   # we add or remove a job from the matrix.
-  build-all:
-    # The job name should match the name of the `build` job.
-    name: Build distribution packages
-    needs: ["build"]
-    # We skip this job only if build was also skipped
-    if: always() && needs.build.result != 'skipped'
+  test-installation-all:
+    # The job name should match the name of the `test-installation` job.
+    name: Test package installation
+    needs: ["test-installation"]
+    # We skip this job only if test-installation was also skipped
+    if: always() && needs.test-installation.result != 'skipped'
     runs-on: ubuntu-24.04
     env:
-      DEPS_RESULT: ${{ needs.build.result }}
+      DEPS_RESULT: ${{ needs.test-installation.result }}
     steps:
       - name: Check matrix job result
         run: test "$DEPS_RESULT" = "success"
@@ -173,7 +222,7 @@ jobs:
 
   publish-docs:
     name: Publish documentation website to GitHub pages
-    needs: ["nox-all", "build-all"]
+    needs: ["nox-all", "test-installation-all"]
     if: github.event_name == 'push'
     runs-on: ubuntu-24.04
     permissions: