name: LaTeX Lint

on:
  push:
    branches:
      - main
      - dev

jobs:
  lint:
    runs-on: ubuntu-latest

    steps:
      - name: Check out repository
        uses: actions/checkout@v4

      - name: Install chktex and dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y chktex

      - name: Find all .tex files and run chktex
        run: |
          # Exit with non-zero if any .tex file ha​s a lint error
          files=$(find latex -type f -name "*.tex")
          if [ -z "$files" ]; then
            echo "No .tex files found under latex/—skipping lint."
            exit 0
          fi

          echo "Running chktex on:"
          echo "$files" | tr ' ' '\n'

          # Run chktex on each file; fail if any issues reported
          # -q suppresses info messages; -n1 treats warnings/errors as fatal
          FAIL=0
          for f in $files; do
            chktex -q -n1 "$f" || FAIL=1
          done

          if [ $FAIL -ne 0 ]; then
            echo "::error::Lint errors detected in one or more .tex files."
            exit 1
          fi

      - name: Success message
        if: ${{ always() && success() }}
        run: echo "✅ All .tex files passed chktex lint."