[ci] Added pre-commit and git diff check.

.gitlab-ci.yml

 stages:
+  - pre-checks
   - test
   - checks
   - package
@@ -6,9 +7,11 @@ stages:
 variables:
   CONTAINER_GCC_IMAGE: $CI_REGISTRY_IMAGE/gcc:$CI_COMMIT_REF_SLUG
   XUNIT_TO_JUNIT_IMAGE: $CI_REGISTRY_IMAGE/xunit-to-junit
+  PRECOMMIT_IMAGE: $CI_REGISTRY_IMAGE/pre-commit
 
 include:
   - local: '/scripts/ci/extends/container-maker-setup.yml'
+  - local: '/scripts/ci/jobs/pre-commit.yml'
   - local: '/scripts/ci/jobs/build_image.yml'
   - local: '/scripts/ci/jobs/build.yml'
   - local: '/scripts/ci/jobs/build-win.yml'

MaterialLib/SolidModels/MFront/DruckerPrager.mfront

@@ -90,4 +90,3 @@ lam.setGlossaryName("EquivalentPlasticStrain");
         dflam_ddeel = theta * (nF | D) / D(0, 0);
     }
 }
-

scripts/ci/jobs/build_image.yml

@@ -25,3 +25,17 @@ build xunit-to-junit image:
     - docker pull $XUNIT_TO_JUNIT_IMAGE:latest || true
     - docker build --cache-from $XUNIT_TO_JUNIT_IMAGE:latest -t $XUNIT_TO_JUNIT_IMAGE:latest -f scripts/docker/saxon/Dockerfile scripts/docker/saxon
     - docker push $XUNIT_TO_JUNIT_IMAGE:latest
+
+
+build pre-commit image:
+  stage: .pre
+  only:
+    changes:
+      - scripts/docker/Dockerfile.pre-commit
+  tags:
+    - docker-shell
+  script:
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+    - docker pull $PRECOMMIT_IMAGE:latest || true
+    - docker build --cache-from $PRECOMMIT_IMAGE:latest -t $PRECOMMIT_IMAGE:latest -f scripts/docker/Dockerfile.pre-commit scripts/docker
+    - docker push $PRECOMMIT_IMAGE:latest

scripts/ci/jobs/pre-commit.yml

+pre commit:
+  stage: pre-checks
+  image:
+    name: $PRECOMMIT_IMAGE
+
+  script:
+    - pre-commit install
+    - pre-commit run --all-files
+    - git diff --check `git merge-base origin/master HEAD` HEAD -- . ':!*.md' ':!*.pandoc' ':!*.asc' ':!*.dat' ':!*.ts'

scripts/docker/Dockerfile.pre-commit

+FROM python:slim
+
+RUN pip install pre-commit
+CMD ["bash"]
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends git curl \
+ && curl -s https://packagecloud.io/install/repositories/github/git-lfs/script.deb.sh | bash \
+ && apt-get install git-lfs \
+ && rm -rf /var/lib/apt/lists/*