Support Bitbucket webhook pull request event type

[magarvo]

Affected Puppet, Ruby, OS and module versions/distributions

• Puppet: 6.12.1-1.el7
• Ruby: 2.0.0p648
• Distribution: CentOS 7.8.2003
• Module version: 9.0.0

I have deployed r10k/webhook using the Puppet module provided in the Puppet forge (puppet-r10k ).

I'm looking to trigger a deployment based on webhooks from Bitbucket.

• During testing I've been able to trigger an environment deployment manually ('r10k deoploy environment').
• Also sucessful in triggering a webhook for a 'Repository' event (push, modified etc).
• But I've been without success using the 'Pull request' event (merge, opened etc).

The event payload for a pull request event type is different than a 'Repository' event type and needs to be handled separately.
https://support.atlassian.com/bitbucket-cloud/docs/event-payloads/

The problem is that the branch name can't be read and the script continues with a NilClass variable.

[2020-09-29 15:04:28] INFO  module or branch name '' had to be escaped!
[2020-09-29 15:04:28] INFO  Deploying environment '' in the background

    # Iterate the data structure to determine what's should be deployed
    branch = (
        data['ref']                                               ||  # github & gitlab
        data['refChanges'][0]['refId']                 rescue nil ||  # stash
        data['push']['changes'][0]['new']['name']      rescue nil ||  # bitbucket
        data['changes'][0]['ref']['displayId']         rescue nil ||  # bitbucket server repository event
        data['pullRequest']['fromRef']['displayId']    rescue nil ||  # bitbucket server pull request event  << Added this
        data['resource']['refUpdates'][0]['name']      rescue nil ||  # TFS/VisualStudio-Git
        data['repository']['default_branch']                          # github tagged release; no ref.
      ).sub('refs/heads/', '') rescue nil