Pronto runs analysis quickly by checking only the relevant changes. Created to be used on GitHub pull requests, but also works locally and integrates with GitLab and Bitbucket. Perfect if you want to find out quickly if a branch introduces changes that conform to your styleguide, are DRY, don't introduce security holes and more.

This README might be ahead of the latest release. Find the README for v0.9.2 here.

• Installation
• Usage
  • Local Changes
  • GitHub Integration
  • GitLab Integration
  • Bitbucket Integration
• Configuration
• Runners
• Articles
• Changelog
• Copyright

Pronto's installation is standard for a Ruby gem:

$ gem install pronto

You'll also want to install some runners to go along with the main gem:

$ gem install pronto-rubocop
$ gem install pronto-flay

If you'd rather install Pronto using bundler, you don't need to require it, unless you're gonna run it from Ruby (via Rake task, for example):

gem 'pronto'
gem 'pronto-rubocop', require: false
gem 'pronto-flay', require: false

Pronto runs the checks on a diff between the current HEAD and the provided commit-ish (default is master).

Navigate to the repository you want to run Pronto on, and:

git checkout feature/branch

# Analyze diff of committed changes on current branch and master:
pronto run

# Analyze changes in git staging area
pronto run --staged

# Analyze diff of uncommitted changes and master:
pronto run --unstaged

# Analyze *all* changes since the *initial* commit (may take some time):
pronto run --commit=$(git log --pretty=format:%H | tail -1)

Just run pronto without any arguments to see what Pronto is capable of.

Available Options

You can run Pronto as a step of your CI builds and get the results as comments on GitHub commits using GithubFormatter or GithubPullRequestFormatter.

Add Pronto runners you want to use to your Gemfile:

Set the PRONTO_GITHUB_ACCESS_TOKEN environment variable or value in .pronto.yml to OAuth token that has access to the repository.

Then just run it:

$ PRONTO_GITHUB_ACCESS_TOKEN=token pronto run -f github -c origin/master

If you want comments to appear on pull request diff, instead of commit:

$ PRONTO_GITHUB_ACCESS_TOKEN=token pronto run -f github_pr -c origin/master

If you want review to appear on pull request diff, instead of separate comments:

$ PRONTO_GITHUB_ACCESS_TOKEN=token pronto run -f github_pr_review -c origin/master

All the N pending comments will be now separated into X number of PR reviews. The number of the PR reviews will be controlled by an additional environment variable or with the help of a config setting. This way, by a single pronto run, all the comments will be published to the PR, but divided into small reviews in order to avoid the rate limit of the providers.

X = N / {PRONTO_WARNINGS_PER_REVIEW || warnings_per_review || 30})

Note: In case no environment variable or config setting is specified in .pronto.yml, a default value of 30 will be used.

$ PRONTO_WARNINGS_PER_REVIEW=30 PRONTO_GITHUB_ACCESS_TOKEN=token pronto run -f github_pr_review -c origin/master

Use GithubStatusFormatter to submit commit status:

$ PRONTO_GITHUB_ACCESS_TOKEN=token pronto run -f github_status -c origin/master

If you want to show a one single status for all runners, instead of status per runner:

$ PRONTO_GITHUB_ACCESS_TOKEN=token pronto run -f github_combined_status -c origin/master

It's possible to combine multiple formatters. To get both pull request comments and commit status summary use:

$ PRONTO_GITHUB_ACCESS_TOKEN=token PRONTO_PULL_REQUEST_ID=id pronto run -f github_status github_pr -c origin/master

As an alternative, you can also set up a rake task:

Pronto::GemNames.new.to_a.each { |gem_name| require "pronto/#{gem_name}" }

formatter = Pronto::Formatter::GithubFormatter.new # also possible: GithubPullRequestFormatter, GithubPullRequestReviewFormatter
status_formatter = Pronto::Formatter::GithubStatusFormatter.new
formatters = [formatter, status_formatter]
Pronto.run('origin/master', '.', formatters)

You can also run Pronto as a GitHub action.

Here's an example .github/workflows/pronto.yml workflow file using the github_status and github_pr formatters and running on each GitHub PR, with pronto-rubocop as the runner:

name: Pronto
on: [pull_request]

jobs:
  pronto:

    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - run: |
          git fetch --no-tags --prune --depth=10 origin +refs/heads/*:refs/remotes/origin/*
      - name: Setup Ruby
        uses: ruby/setup-ruby@v1
      - name: Setup pronto
        run: gem install pronto pronto-rubocop
      - name: Run Pronto
        run: pronto run -f github_status github_pr -c origin/${{ github.base_ref }}
        env:
          PRONTO_PULL_REQUEST_ID: ${{ github.event.pull_request.number }}
          PRONTO_GITHUB_ACCESS_TOKEN: "${{ github.token }}"

check Wiki on GitHub Actions Integration for more info.

You can run Pronto as a step of your CI builds and get the results as comments on GitLab commits using GitlabFormatter.

note: this requires at least GitLab v7.5.0

Set the PRONTO_GITLAB_API_ENDPOINT environment variable or value in .pronto.yml to your API endpoint URL. If you are using Gitlab.com's hosted service your endpoint will be set by default. Set the PRONTO_GITLAB_API_PRIVATE_TOKEN environment variable or value in .pronto.yml to your Gitlab private token which you can find in your account settings.

Then just run it:

$ PRONTO_GITLAB_API_PRIVATE_TOKEN=token pronto run -f gitlab -c origin/master

note: this requires at least Gitlab 11.6+

Merge request integration:

$ PRONTO_GITLAB_API_PRIVATE_TOKEN=token PRONTO_PULL_REQUEST_ID=id pronto run -f gitlab_mr -c origin/master

On GitLabCI, make sure to run Pronto in a merge request pipeline:

lint:
  image: ruby:3.3.0 # change to your app's ruby version
  variables:
    PRONTO_GITLAB_API_ENDPOINT: "https://gitlab.com/api/v4" # required if you are using self hosted Gitlab
    PRONTO_GITLAB_API_PRIVATE_TOKEN: $ACCESS_TOKEN # configure as a variable in Gitlab CI settings
  only:
    - merge_requests
  script:
    - apt-get update && apt-get install -y cmake # Install cmake required for rugged gem (Pronto depends on it)
    - bundle install
    # Pronto fails with the error "revspec 'origin/{target_branch}' because Gitlab fetches changes with git depth set to 20 by default. You can remove this line if you update Gitlab CI setting to clone the full project.
    - git fetch origin $CI_MERGE_REQUEST_TARGET_BRANCH_NAME
    # Run pronto on branch of current merge request
    - bundle exec pronto run -f gitlab_mr -c origin/$CI_MERGE_REQUEST_TARGET_BRANCH_NAME

You can run Pronto as a step of your CI builds and get the results as comments on Bitbucket commits using BitbucketFormatter or BitbucketPullRequestFormatter.

Add Pronto runners you want to use to your Gemfile:

Set the PRONTO_BITBUCKET_USERNAME and PRONTO_BITBUCKET_PASSWORD environment variables or values in .pronto.yml.

Then just run it:

$ PRONTO_BITBUCKET_USERNAME=user PRONTO_BITBUCKET_PASSWORD=pass pronto run -f bitbucket -c origin/master

or, if you want comments to appear on pull request diff, instead of commit:

$ PRONTO_BITBUCKET_USERNAME=user PRONTO_BITBUCKET_PASSWORD=pass pronto run -f bitbucket_pr -c origin/master

The behavior of Pronto can be controlled via the .pronto.yml configuration file. It can either be placed in the working directory (*) or specified using the environment variable PRONTO_CONFIG_FILE.

(*) The working directory is where you run the command from, which is typically your project directory.

If this file cannot be found, then the default configuration in Pronto::ConfigFile::EMPTY applies.

The file has the following format:

all:
  exclude:
    - 'spec/**/*'
# exclude files for single runner
eslint:
  exclude:
    - 'app/assets/**/*'
github:
  slug: prontolabs/pronto
  access_token: B26354
  api_endpoint: https://api.github.com/
  web_endpoint: https://github.com/
gitlab:
  slug: 1234567 # gitlab's project ID
  api_private_token: 46751
  api_endpoint: https://api.vinted.com/gitlab
bitbucket:
  slug: prontolabs/pronto
  username: user
  password: pass
  web_endpoint: https://bitbucket.org/
max_warnings: 150
warnings_per_review: 30
verbose: false
runners: [rubocop, eslint] # only listed runners will be executed
skip_runners: [reek] # all, except listed runners will be executed

All properties that can be specified via .pronto.yml, can also be specified via environment variables. Their names will be the upcased path to the property. For example: PRONTO_GITHUB_SLUG or PRONTO_GITLAB_API_PRIVATE_TOKEN. Environment variables will always take precedence over values in configuration file.

Pronto allows you to configure the format of the messages that are produced. You can set a default format that will be used by all formatters, or you can configure a separate format per formatter, if you are using several.

To change the default format:

format: "%{runner} %{level} %{msg}"

To add the title of the Runner to the GitHub Pull Request formatter only:

github_pr:
  format: "%{runner} - %{msg}"

The available values to be interpolated into the message are:

The following values are available only to the text formatter:

Pronto can run various tools and libraries, as long as there's a runner for it. Currently available:

• pronto-bigfiles
• pronto-blacklist
• pronto-brakeman
• pronto-checkstyle
• pronto-coffeelint
• pronto-clang_format
• pronto-clang_tidy
• pronto-clippy
• pronto-credo
• pronto-dialyxir
• pronto-dialyzer
• pronto-dirty_words
• pronto-dogma
• pronto-erb_lint
• pronto-eslint (uses eslintrb)
• pronto-eslint_npm (uses eslint installed from npm)
• pronto-fasterer
• pronto-findbugs
• pronto-flake8
• pronto-flay
• pronto-flow
• pronto-foodcritic
• pronto-goodcheck
• pronto-haml
• pronto-hlint (uses Haskell code suggestions hlint)
• pronto-infer
• pronto-inspec
• pronto-jscs
• pronto-jshint
• pronto-json
• pronto-luacheck
• pronto-perl_lint
• pronto-phpcs
• pronto-phpmd
• pronto-phpstan
• pronto-poper
• pronto-punchlist
• pronto-rails_best_practices
• pronto-rails_data_schema
• pronto-rails_schema
• pronto-reek
• pronto-rubocop
• pronto-scss
• pronto-shellcheck
• pronto-slim
• pronto-slim_lint
• pronto-sorbet
• pronto-spell
• pronto-standardrb
• pronto-stylelint
• pronto-swiftlint
• pronto-tailor
• pronto-textlint
• pronto-tslint_npm
• pronto-yamllint
• pronto-undercover
• pronto-xmllint

Articles to help you to get started:

• Effortless Code Conventions Review for Pull Request Changes
• Automating code review with Pronto (and friends)
• Setup Pronto with CircleCI
• Continuous Static Analysis using Pronto
• Pronto and git hooks
• How to end fruitless dev discussions about your project’s code style?
• Free automated code reviews using Pronto
• Automated Elixir code review with Github, Credo and Travis CI
• Running Rubocop before git commit
• Pronto, Codeship and GitHub for automatic code review
• How to automatically review your PRs for style violations with Pronto and RuboCop
• Create your own Pronto Runner
• Make Code Reviews A Little Bit Better With Automation
• Stop shipping untested Ruby code with undercover
• Automatic code review with Pronto and GitHub Actions
• Integrate Pronto with Gitlab CI for Rails App

Make a Pull Request to add something you wrote or found useful.

Pronto's changelog is available here.

Copyright (c) 2013-2018 Mindaugas Mozūras. See LICENSE for further details.