Module: Cyclid::API::Plugins::ApiExtension::GithubMethods::PullRequest

Included in:
Cyclid::API::Plugins::ApiExtension::GithubMethods
Defined in:
app/cyclid/plugins/api/github/pull_request.rb

Overview

Handle a Pull Request event

Instance Method Summary collapse

Instance Method Details

#event_pull_request(config) ⇒ Object

Handle a Github Pull Request event



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# File 'app/cyclid/plugins/api/github/pull_request.rb', line 31

def event_pull_request(config)
  # Safely load the JSON event data
  @payload = parse_request_body
  Cyclid.logger.debug "hook payload=#{@payload.inspect}"

  # Do we know what to do with this action?
  action = @payload['action'] || nil

  Cyclid.logger.debug "action=#{action}"
  return true unless action == 'opened' \
                  or action == 'reopened' \
                  or action == 'synchronize'

  # Get the list of files in the root of the repository in the
  # Pull Request branch
  clone_url = URI(pr_head_url)

  # Get the authentication key
  auth_token = find_oauth_token(config, clone_url)

  return_failure(400, "can not find a valid OAuth token for #{clone_url}") \
    if auth_token.nil?

  # Create an Octokit client
  @client = Octokit::Client.new(access_token: auth_token)

  # Set the PR to 'pending'
  @client.create_status(pr_repository, pr_sha, 'pending',
                        context: 'Cyclid', description: 'Preparing build')

  # Get the Pull Request
  tree = @client.tree(pr_repository, pr_sha, recursive: false)
  Cyclid.logger.debug "tree=#{tree.to_hash}"

  # Find the Cyclid job file (if it exists)
  job_sha, job_type = find_job_file(tree)
  Cyclid.logger.debug "job_sha=#{job_sha}"

  if job_sha.nil?
    @client.create_status(pr_repository, pr_sha, 'error',
                          context: 'Cyclid', description: 'No Cyclid job file found')

    return_failure(400, 'not a Cyclid repository')
  end

  # Get the job file
  begin
    job_definition = load_job_file(pr_repository, job_sha, job_type)

    # Insert this repository & branch into the sources
    clone_source = normalize(clone_url.to_s)
    clone_source['type'] = 'git'
    clone_source['branch'] = pr_ref
    clone_source['token'] = auth_token

    # We need to avoid causing a collision between the PR source
    # (which may be from a forked repo) and any source definitions
    # which may exist in the job file (which may be the "base"
    # repository.
    #
    # Compare everything and try to match any duplicates, and
    # flatten the sources.
    job_sources = insert_or_update_source(job_definition['sources'] || [], clone_source)
    job_definition['sources'] = job_sources

    Cyclid.logger.debug "sources=#{job_definition['sources']}"
  rescue StandardError => ex
    Cyclid.logger.error "failed to retrieve Github Pull Request job: #{ex}"

    @client.create_status(pr_repository, pr_sha, 'error',
                          context: 'Cyclid',
                          description: "Couldn't retrieve Cyclid job file")
    return_failure(400, 'not a Cyclid repository')
  end

  Cyclid.logger.debug "job_definition=#{job_definition}"

  begin
    # Retrieve the plugin configuration
    plugins_config = Cyclid.config.plugins
    github_config = load_github_config(plugins_config)

    ui_url = github_config[:ui_url]
    linkback_url = "#{ui_url}/#{organization_name}"

    # Inject some useful context data
    ctx = { github_event: 'pull_request',
            github_user: pull_request['user']['login'],
            github_ref: pr_ref,
            github_comment: pull_request['title'] }

    callback = GithubCallback.new(auth_token, pr_repository, pr_sha, linkback_url)
    job_from_definition(job_definition, callback, ctx)
  rescue StandardError
    @client.create_status(pr_repository, pr_sha, 'error',
                          context: 'Cyclid', description: 'An unknown error occurred')

    return_failure(500, 'job failed')
  end

  return true
end

#insert_or_update_source(sources, new_source) ⇒ Object

Either insert (append) the Pull Request head repository, or replace an existing definition; for example if the job contains a source definition for “github.com/foo/bar” and the PR head is “github.com/baz/bar”, replace “foo/bar” with “baz/bar”



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# File 'app/cyclid/plugins/api/github/pull_request.rb', line 139

def insert_or_update_source(sources, new_source)
  updated = false
  new_uri = URI.parse(new_source['url'])

  normalized = sources.map do |source|
    uri = URI.parse(source['url'])
    next unless uri.scheme =~ /\Ahttps?\z/

    # If the "humanish" components match, use the new definition.
    if humanish(uri) == humanish(new_uri)
      updated = true
      new_source
    else
      source
    end
  end

  # If we didn't update an existing source definition, insert the new one
  normalized << new unless updated

  normalized.compact
end