Reapply "switch back to py action"

This reverts commit f366480.

Author: vszakats

.github/workflows/build.yml

@@ -67,12 +67,12 @@ jobs:
         with:
           persist-credentials: false
 
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6
+        with:
+          python-version: '3.12'
+
       - name: Install test dependencies
-        run: |
-          python3 -m venv ~/venv
-          ~/venv/bin/pip --disable-pip-version-check --no-input --no-cache-dir install --progress-bar off --prefer-binary '.[python-tests]'
+        run: pip --disable-pip-version-check --no-input --no-cache-dir install --progress-bar off --prefer-binary '.[python-tests]'
 
       - name: Run TLV constants sync test
-        run: |
-          source ~/venv/bin/activate
-          pytest tests/test_tlv_constants_sync.py
+        run: pytest tests/test_tlv_constants_sync.py

.github/workflows/checksrc.yml

@@ -27,11 +27,14 @@ jobs:
         with:
           persist-credentials: false
 
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6
+        with:
+          python-version: '3.12'
+
       - name: 'install prereqs'
         run: |
           /home/linuxbrew/.linuxbrew/bin/brew install zizmor
-          python3 -m venv ~/venv
-          ~/venv/bin/pip --disable-pip-version-check --no-input --no-cache-dir install --progress-bar off --prefer-binary '.[ci-tests]'
+          pip --disable-pip-version-check --no-input --no-cache-dir install --progress-bar off --prefer-binary '.[ci-tests]'
 
       - name: 'zizmor GHA'
         env:
@@ -42,7 +45,6 @@ jobs:
 
       - name: 'ruff'
         run: |
-          source ~/venv/bin/activate
           ruff --version
           # shellcheck disable=SC2046
           ruff check $(git ls-files '*.py')

.github/workflows/ci.yml

@@ -69,13 +69,13 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix: ${{ fromJSON(needs.DetermineMatrix.outputs.matrix) }}
-    env:
-      MATRIX_FUZZER: '${{ matrix.fuzzer }}'
     steps:
       - uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
         with:
           name: fuzz_tar
       - name: Unpack fuzzer ${{ matrix.fuzzer }}
+        env:
+          MATRIX_FUZZER: '${{ matrix.fuzzer }}'
         run: tar xvf fuzz.tar build-out/"${MATRIX_FUZZER}" build-out/"${MATRIX_FUZZER}"_seed_corpus.zip
       - name: Display extracted files
         run: ls -laR build-out/

.github/workflows/pages-ci.yml

@@ -24,21 +24,20 @@ jobs:
         with:
           persist-credentials: false
 
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6
+        with:
+          python-version: '3.12'
+
       - name: Install dependencies
         run: |
-          python3 -m venv ~/venv
-          ~/venv/bin/pip --disable-pip-version-check --no-input --no-cache-dir install --progress-bar off --prefer-binary '.[page-gen,browser-tests]'
-          source ~/venv/bin/activate
+          pip --disable-pip-version-check --no-input --no-cache-dir install --progress-bar off --prefer-binary '.[page-gen,browser-tests]'
           python -m playwright install
 
       - name: Install Playwright system dependencies
         run: |
           sudo rm -f /etc/apt/sources.list.d/microsoft-prod.list
           sudo rm -f /var/lib/man-db/auto-update
-          source ~/venv/bin/activate
           playwright install-deps
 
       - name: Run Playwright browser test
-        run: |
-          source ~/venv/bin/activate
-          pytest tests/browser/test_corpus_decoder.py
+        run: pytest tests/browser/test_corpus_decoder.py

.github/workflows/pages.yml

@@ -21,15 +21,15 @@ jobs:
         with:
           persist-credentials: false
 
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6
+        with:
+          python-version: '3.12'
+
       - name: Install dependencies
-        run: |
-          python3 -m venv ~/venv
-          ~/venv/bin/pip --disable-pip-version-check --no-input --no-cache-dir install --progress-bar off --prefer-binary '.[page-gen]'
+        run: pip --disable-pip-version-check --no-input --no-cache-dir install --progress-bar off --prefer-binary '.[page-gen]'
 
       - name: Generate decoder HTML
-        run: |
-          source ~/venv/bin/activate
-          python -m curl_fuzzer_tools.generate_decoder_html
+        run: python -m curl_fuzzer_tools.generate_decoder_html
 
       - name: Upload artifact
         uses: actions/upload-pages-artifact@7b1f4a764d45c48632c6b24a0339c27f5614fb0b # v4.0.0