Project

prophet

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Prophet runs custom code (i.e. your project's test suite) on open pull requests on GitHub. Afterwards it posts the result as a comment to the respective request. This should give you an outlook on the future state of your repository in case you accept the request and merge the code.
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 Dependencies

Runtime

~> 0.11.0
~> 4.0
 Project Readme

Prophet

Build Status

Loops through open pull requests on a GitHub hosted repository and runs your code (i.e. tests) on the merged branch. After the run has finished, Prophet will post a comment to the pull request stating whether the execution succeeded or failed.

Ever since GitHub released their awesome commit status API, Prophet also makes use of that and sets statuses according to the execution of your code to 'pending', 'failure' or 'success'. However, keep in mind that the account you are using to run Prophet needs to have write access to your GitHub repository, to set statuses.

Rails projects

Installation is quite easy. If you are using bundler (i.e. for a Rails project), just add the following to your Gemfile:

gem 'prophet'

To configure Prophet for your Rails project, just create a new initializer:

touch config/initializers/prophet.rb

Inside that initializer you can easily change Prophet's behavior to fit your needs.

Prophet.setup do |config|
  # ...
  # Add custom config block.
  # ...
end

Please read this README's configuration section for further details on customization.

Finally, to run Prophet, just call the corresponding rake task either manually or inside your CI (i.e. Jenkins).

rake prophet

Other projects

Since you are able to run any command inside Prophet's execution block, you can use it for any project and programming language. The only requirement would be to have Ruby and RubyGems installed, such that you can run Prophet itself.

Installing the gem manually (without bundler), is simple and straight forward, too.

gem install prophet

Afterwards, create an executable file where you require the gem, maybe configure it and in the end just call Prophet manually.

#!/usr/bin/env ruby

require 'prophet'

Prophet.setup do |config|
  # ...
  # Add custom config block.
  # ...
end

Prophet.run

Please read this README's configuration section for further details on customization.

Configuration

Even though you don't really need to configure Prophet, as it ships with some default values for everything, there is an easy way to override all these settings and customize Prophet to fit your needs perfectly.

Inside your configuration file - either the initializer in your Rails project or the executable script you manually created for your non-Rails project - you can set options like this:

Prophet.setup do |config|

  # Setup custom logger.
  config.logger = log = Logger.new(STDOUT)
  log.level = Logger::INFO

  # Custom GitHub (GH) username/password to use for commenting on a successful run.
  # These credentials are also used for setting the status of the pull request.
  config.username = 'foo-success'
  config.password = 'bar'

  # Custom GH credentials for commenting on failing runs.
  # NOTE: If you specify two different accounts with different avatars,
  # it's a lot easier to spot failing runs at first glance.
  config.username_fail = 'foo-fail'
  config.password_fail = 'baz'

  # Specify when to run your code.
  # By default your code will run every time either the pull request or its
  # target (i.e. master) changes.
  config.rerun_on_source_change = true
  config.rerun_on_target_change = true

  # In order to reuse noise, you can choose to reuse & update existing comments.
  config.reuse_comments = false

  # In some cases it might also be desirable to disable the comments completely.
  config.disable_comments = false

  # Configure status context, e.g. in order to distinguish different prophets.
  config.status_context = 'prophet/unit'

  # Add custom messages for comments and statuses.
  config.comment_success = 'Well Done! Your tests are still passing.'
  config.comment_failure = 'Unfortunately your tests are failing.'
  config.status_pending = 'Tests are still running.'
  config.status_success = 'Tests are passing.'
  config.status_failure = 'Tests are failing.'
  config.status_target_url = 'http://ci.example.com/'

  # If you need to make some system calls before looping through the pull requests,
  # you specify them here. This block will only be executed once and defaults to an
  # empty block.
  config.preparation do
    # Example: Setup jenkins.
    # `rake -f /usr/lib/ruby/gems/1.9.1/gems/ci_reporter-1.7.0/stub.rake`
    # `rake ci:setup:testunit`
  end

  # Finally, specify which code to run. (Defaults to `rake`.)
  # NOTE: If you don't set config.success manually to a boolean value,Prophet
  # will try to determine it by looking at whether the last system call returned
  # 0 (= success).
  config.execution do
    log 'Running tests ...'
    `rake test:all`
    config.success = ($? == 0)
    log "Tests are #{config.success ? 'passing' : 'failing'}."
  end

end

If you don't specify anything (or don't even create an initializer), Prophet would fall back to its defaults, thereby trying to take the username/password from git config. To set or change these values you can use the following commands:

git config --global github.login your_github_login_1234567890
git config --global github.password your_github_password_1234567890

Prophet runs git gc after every run to clean up potential remains and start the garbage collector. If you are making heavy use of Prophet, think about running something like git gc --aggressive --prune=now every now and then.

Thanks

A big "Thank you" goes out to Konstantin Haase (rkh / @konstantinhaase) who told us about this idea at Railsberry 2012 in Krakow.

http://www.youtube.com/watch?v=YFzloW8F-nE

If you are using Prophet to run your tests, it therefore only mimics one of TravisCI's features (to a certain degree at least). If you want the full experience, go to

http://travis-ci.org

and sign in, using your GitHub account.

Prophet is getting tested with Travis, too.

https://secure.travis-ci.org/b4mboo/prophet