ChkTeX is a LaTeX linter. A linter is a program that checks your work for potential stylistic or formatting issues. For LaTeX, this includes soft errors (e.g., missing braces or alignment problems) and choices that could lead to rendering inconsistencies.

This Action runs ChkTeX version 1.7.9 on .tex files in your repository.

To customize ChkTeX's behavior, add a .chktexrc configuration file to your repository's root. This file allows you to define specific rules and exclusions for the linter. Refer to the ChkTeX documentation for details on how to create and configure this file. If no local repository .chktexrc file can be found, the action will use the global ChkTeX configuration distributed as part of the ChkTeX software that runs in the Action container.

ChkTeX Action reviews your pull requests when used with the pull_request event. If ChkTeX reports errors or warnings, the Action will request changes:

When this happens, the files changed will be annotated with the error and warning messages from ChkTeX:

Once you fix all the issues and trigger the Action again, the Action will approve your pull request:

ChkTeX Action also posts a step summary under Actions > [workflow run] > Summary:

To use this Action in your repository, add it to your custom workflow.

By default, the Action will only lint the files in the latest pushed commit when used with the push event. If you want to override this behavior, set lint-all: true to lint all .tex files in your repository.

When used with the pull_request event, the Action only lints the .tex files that are part of the pull request.

• push: Lints .tex files in the latest pushed commit.
• pull_request: Lints .tex files that are part of the pull request.

• For the push event, set:
  • contents: read
• For the pull_request event, set:
  • pull-requests: write
  • checks: write
  • Additionally, enable Allow GitHub Actions to create and approve pull requests under Repository > Settings > Actions > General > Workflow permissions

• lint-all: Force lint of all files in the repository.
  • Default: false

name: Lint
on: push # Or `pull_request`
permissions:
  contents: read
  pull-requests: write # When using the `pull_request` event
  checks: write # When using the `pull_request` event
jobs:
  lint:
    name: Lint
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Run ChkTeX
        uses: j2kun/chktex-action@v2
        with:
          lint-all: true # Default: `false`