Modern development is so complex that it is simply impossible to keep everything in mind, especially various practices for writing code. This is where linters come to the rescue. They help maintain certain standards in the project and keep the code base in order. At Evrone, we develop in a variety of programming languages, including Ruby, Go, Rust, Python, Elixir, etc., and we connect different linters to each project. To make sure our code meets all quality standards, we run linters using CI services for every commit submitted to GitHub. projects Reviewdog It is very important to us that the result of linters' work is always visible on GitHub, for example, in the form of comments to pull requests. To do this, we use reviewdog, which automates code review and provides seamless integration of any linter with GitHub. Here’s why reviewdog is so good: It is written in Go and can be compiled into a binary file and connected to any project, regardless of the programming language. It can work with any linters, you just need to redirect the linter result to the reviewdog input and define the linter output format, for example, " $ dotenv-linter | reviewdog -efm="%f:%l %m It supports a large number of linters out of the box, such as , rubocop and others. dotenv-linter GitHub Actions As cool as reviewdog is, we still had to spend time setting up CI services to run linters for each project. But that all changed when GitHub announced , a new tool for automating workflows. Simply put, this is a full-fledged CI/CD service with great capabilities that allows you to create your own actions and share them with the community. GitHub Actions Having switched to GitHub Actions, we decided to write our own actions to run popular linters. By doing this, we could simplify the process of connecting linters to any project. This is what we ended up with: action-rubocop action-brakeman action-reek action-fasterer action-hadolint action-dotenv-linter All of our actions can publish linter comments in two modes. 1. As an annotation in the code ( ) github-pr-check 2. And in the form of comments to pull requests ( ) github-pr-review Ruby Actions The first 4 actions (action-rubocop, action-brakeman, action-reek, and action-fasterer) allow you to run popular linters from the Ruby community: rubocop, brakeman, reek, and fasterer. To connect these actions to your project, you just need to create a file with the following content: .github/workflows/linters.yml # .github/workflows/linters.yml
name: linters
on: [pull_request]
jobs:
  linters:
    name: runner / linters
    runs-on: ubuntu-latest
    steps:
      - name: Check out code
        uses: actions/checkout@v1
      - name: rubocop
        uses: reviewdog/action-rubocop@v1 :
          rubocop_version: gemfile
          rubocop_extensions: rubocop-rails:gemfile rubocop-rspec:gemfile
          github_token: ${{ secrets.github_token }}
      - name: brakeman
        uses: reviewdog/action-brakeman@v1 :
          brakeman_version: gemfile
          github_token: ${{ secrets.github_token }}
      - name: reek
        uses: reviewdog/action-reek@v1 :
          reek_version: gemfile
          github_token: ${{ secrets.github_token }}
      - name: fasterer
        uses: vk26/action-fasterer@v1 :
          github_token: ${{ secrets.github_token }} with with with with For action-rubocop, action-brakeman, and action-reek, it is possible to specify the linter version. There are 3 options available: An empty value or no version - the latest version will be installed. - the version from Gemfile.lock will be installed. gemfile 1.0.0 - the specified version will be installed. Action-rubocop also provides the ability to install additional extensions. The following extensions are installed by default: . But this can be overridden using the attribute. rubocop-rails, rubocop-performance, rubocop-rspec, rubocop-i18n, rubocop-rake rubocop_extensions Dockerfile Action The next action, action-hadolint, looks for all in the project and checks them using the hadolint linter. Usage example: Dockerfile # .github/workflows/hadolint.yml
name: hadolint
on: [pull_request]
jobs:
 hadolint:
   name: runner / hadolint
   runs-on: ubuntu-latest
   steps:
     - name: Check out code
       uses: actions/checkout@v1
     - name: hadolint
        uses: reviewdog/action-hadolint@v1 :
         github_token: ${{ secrets.github_token }}
         hadolint_ignore: DL3008 with Dotenv-linter Action And last but not least, is action-dotenv-linter. It allows you to easily and simply check all files on the project. Usage example: .env # .github/workflows/dotenv_linter.yml
name: dotenv-linter
on: [pull_request]
jobs:
  dotenv-linter:
    name: runner / dotenv-linter
    runs-on: ubuntu-latest
    steps:
      - name: Check out code
        uses: actions/checkout@v1
      - name: dotenv-linter
        uses: dotenv-linter/action-dotenv-linter@v2 :
          github_token: ${{ secrets.github_token }}
          dotenv_linter_flags: --skip UnorderedKey with Find more GitHub Actions on the page and reach out to us if you need help with the development of your project. GitHub Marketplace . Previously published at https://evrone.com/github-actions. The author of the story is the Chief Editor at Evrone

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Elizabeth is a Chief Editor @Evrone.com, a top-notch tech writer, and a programming world celebrities interviewer. 

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