Azure/GitLab CI: Add the pylint checker

Add a check that new Python code does not regress the pylint score for
any module.

Signed-off-by: Simon Glass <sjg@chromium.org>

.azure-pipelines.yml

@@ -202,6 +202,28 @@ stages:
           export PATH=/opt/gcc-11.1.0-nolibc/arm-linux-gnueabi/bin:$PATH
           test/nokia_rx51_test.sh
 
+  - job: pylint
+    displayName: Check for any pylint regressions
+    pool:
+      vmImage: $(ubuntu_vm)
+    container:
+      image: $(ci_runner_image)
+      options: $(container_option)
+    steps:
+      - script: |
+          cd ${WORK_DIR}
+          export USER=azure
+          pip install -r test/py/requirements.txt
+          pip install asteval pylint pyopenssl
+          export PATH=${PATH}:~/.local/bin
+          echo "[MASTER]" >> .pylintrc
+          echo "load-plugins=pylint.extensions.docparams" >> .pylintrc
+          export UBOOT_TRAVIS_BUILD_DIR=/tmp/sandbox_spl
+          ./tools/buildman/buildman -T0 -o ${UBOOT_TRAVIS_BUILD_DIR} -w --board sandbox_spl
+          pylint --version
+          export PYTHONPATH=${UBOOT_TRAVIS_BUILD_DIR}/scripts/dtc/pylibfdt
+          make pylint_err
+
 - stage: test_py
   jobs:
   - job: test_py

.gitlab-ci.yml

@@ -215,6 +215,22 @@ Run tests for Nokia RX-51 (aka N900):
     - export PATH=/opt/gcc-11.1.0-nolibc/arm-linux-gnueabi/bin:$PATH;
       test/nokia_rx51_test.sh
 
+# Check for any pylint regressions
+Run pylint:
+  stage: testsuites
+  script:
+    - pip install -r test/py/requirements.txt
+    - pip install asteval pylint pyopenssl
+    - export PATH=${PATH}:~/.local/bin
+    - echo "[MASTER]" >> .pylintrc
+    - echo "load-plugins=pylint.extensions.docparams" >> .pylintrc
+    - export UBOOT_TRAVIS_BUILD_DIR=/tmp/sandbox_spl
+    - ./tools/buildman/buildman -T0 -o ${UBOOT_TRAVIS_BUILD_DIR} -w
+        --board sandbox_spl
+    - pylint --version
+    - export PYTHONPATH="${UBOOT_TRAVIS_BUILD_DIR}/scripts/dtc/pylibfdt"
+    - make pylint_err
+
 # Test sandbox with test.py
 sandbox test.py:
   variables: