ci: dump the style patch to the log

.gitlab-ci.yml

@@ -39,34 +39,10 @@ Check licenses:
   interruptible: true
 
 Check style:
-  extends: .colorized
-  variables:
-    STYLE_PATCH: ${CI_PROJECT_DIR}/style.patch
   before_script:
     - apk add git pre-commit
   script:
-    - pre-commit run --color=always --all-files
-
-    - git -C "${CI_PROJECT_DIR}" diff --patch-with-raw > "${STYLE_PATCH}"
-    - |
-      # Test if patching is necessary
-      test -s "${STYLE_PATCH}" && {
-        printf "${RED}The source code does not meet the style requirements. \
-      Please, apply the patch (see artifacts).\nNote that the result of the \
-      formatting might depend on the versions of the formatting tools \
-      (clang-format and fprettify). In this project, whatever formatting this \
-      CI job produces is the correct one. If it expects you to re-format parts \
-      of the source code that you did not modify, do so in a separate commit, \
-      which must not be squashed, and list the commit in the \
-      '.git-blame-ignore-revs' file.\n${DEFAULT}"
-        exit 1
-      } || rm -rf "${STYLE_PATCH}"
-  artifacts:
-    paths:
-      - ${STYLE_PATCH}
-    expire_in: 60min
-    expose_as: 'Style Patch'
-    when: on_failure
+    - pre-commit run --show-diff-on-failure --color=always --all-files
   tags:
     -  alpine
   rules: