ci: Set up CI for TeX files

.github/workflows/format-tex.yaml

@@ -0,0 +1,18 @@
+name: format-tex
+
+on: [push, pull_request]
+
+jobs:
+  format-tex:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install Dependencies
+        run: |
+          sudo apt install chktex
+
+      - name: Run chktex
+        run: |
+          chktex --nowarn={1,2,8,11,12,36,39} docs/*.tex

scripts/pre-commit

@@ -50,6 +50,14 @@ if git diff --staged --name-only | grep '\.py$'; then
         || exit 1
 fi
 
+# TeX
+if git diff --staged --name-only | grep '\.tex$'; then
+    chktex --version \
+        || { echo HINT: Please install chktex, e.g. '$ sudo apt install chktex'; exit 1; }
+    chktex --nowarn={1,2,8,11,12,36,39} $(git ls-files | grep '\.tex$') \
+        || exit 1
+fi
+
 # Other files
 for ext in yml yaml json md html mjs; do
     if git diff --staged --name-only | grep '\.'$ext'$'; then