Add gitlab-ci configuration

.gitignore

@@ -1,5 +1,6 @@
 *~
 .~*#
+.cache/**
 
 # ---> TeX
 ## Core latex/pdflatex auxiliary files:

.gitlab-ci.yml

@@ -0,0 +1,16 @@
+# Based on https://pre-commit.com
+image: python:alpine
+gitlab-ci-pre-commit:
+  stage: build
+  before_script:
+    - apk add --no-cache git gcc musl-dev go texlive
+    - pip install pre-commit
+  script:
+    - pre-commit run --all-files --show-diff-on-failure
+  variables:
+    # Remember to gitignore .cache/**
+    PRE_COMMIT_HOME: ${CI_PROJECT_DIR}/.cache/pre-commit
+    TERM: dumb
+  cache:
+    paths:
+      - ${PRE_COMMIT_HOME}

.pre-commit-config.yaml

@@ -30,6 +30,13 @@ repos:
     hooks:
       - id: doctoc
         args: [--update-only, --notitle]
+  - repo: https://github.com/python-jsonschema/check-jsonschema
+    rev: 0.23.0
+    hooks:
+      #- id: check-dependabot
+      #- id: check-github-actions
+      #- id: check-github-workflows
+      - id: check-gitlab-ci
   - repo: https://github.com/pre-commit/mirrors-prettier
     rev: "v3.0.0-alpha.9-for-vscode"
     hooks: