Add 'make venv' target (#6775)

Fixes #6775

.github/workflows/format.yml

@@ -28,16 +28,16 @@ jobs:
         env:
           CI_BUILD_STAGE_NAME: build
         run: |
-          bash ci/ci-install.bash &&
-          sudo apt-get install clang-format-18 yapf3 &&
-          sudo pip3 install gersemi==0.23.1 mbake &&
-          git config --global user.email "[email protected]" &&
+          sudo apt install clang-format-18
+          git config --global user.email "[email protected]"
           git config --global user.name "github action"
       - name: Format code
         run: |
-          autoconf &&
-          ./configure &&
-          make -j 2 format CLANGFORMAT=clang-format-18 &&
+          autoconf
+          ./configure
+          make venv
+          source .venv/bin/activate
+          make -j 2 format CLANGFORMAT=clang-format-18
           git status
       - name: Push
         run: |-

.github/workflows/reusable-lint-py.yml

@@ -34,13 +34,17 @@ jobs:
       - name: Install packages for build
         run: ./ci/ci-install.bash
 
-    # We use specific version numbers, otherwise a Python package
-    # update may add a warning and break our build
-      - name: Install packages for lint
-        run: sudo pip3 install mypy==1.18.2 pylint==3.0.2 ruff==0.1.3 clang sphinx sphinx_rtd_theme sphinxcontrib-spelling breathe ruff
-
       - name: Configure
-        run: autoconf && ./configure --enable-longtests --enable-ccwarn
+        run: |
+          autoconf
+          ./configure --enable-longtests --enable-ccwarn
+
+      - name: Install python dependencies
+        run: |
+          sudo apt install python3-clang
+          make venv
 
       - name: Lint
-        run: make -k lint-py
+        run: |
+          source .venv/bin/activate
+          make -k lint-py

.github/workflows/reusable-test.yml

@@ -77,14 +77,18 @@ jobs:
             ${{ env.CACHE_KEY }}-
 
       - name: Install test dependencies
-        run: ./ci/ci-install.bash
+        run: |
+          ./ci/ci-install.bash
+          make venv
 
       - name: Test
         id: run-test
         continue-on-error: true
         env:
           TESTS: ${{ inputs.suite }}
-        run: ./ci/ci-script.bash
+        run: |
+          source .venv/bin/activate
+          ./ci/ci-script.bash
 
       - name: Combine code coverage data
         if: ${{ inputs.dev-gcov }}