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Using the GitHub package

The /whisk.system/github package offers a convenient way to use the GitHub APIs.

The package includes the following feed:

Entity Type Parameters Description
/whisk.system/github package username, repository, accessToken Interact with the GitHub API
/whisk.system/github/webhook feed events, username, repository, accessToken Fire trigger events on GitHub activity

Creating a package binding with the username, repository, and accessToken values is suggested. With binding, you don't need to specify the values each time that you use the feed in the package.

Firing a trigger event with GitHub activity

The /whisk.system/github/webhook feed configures a service to fire a trigger when there is activity in a specified GitHub repository. The parameters are as follows:

  • username: The user name of the GitHub repository.
  • repository: The GitHub repository.
  • accessToken: Your GitHub personal access token.
  • events: The GitHub event type of interest.
  • baseUrl: The GitHub api endpoint. Default value is 'https://api.github.com'.

The following is an example of creating a trigger that will be fired each time that there is a new commit to a GitHub repository.

  1. Generate a GitHub personal access token.
  • Important When creating your personal access token, be sure to select the following scopes:
    • repo: repo:status to allow access to commit status.
    • admin:repo_hook: write:repo_hook to allow the feed action to create your webhook.
  • Warning Make sure that you don't have any webhooks already defined for your repository or they may be overwritten.
  1. Create a package binding that is configured for your GitHub repository and with the personal access token created in step 1.
wsk package bind /whisk.system/github myGit \
  --param baseUrl https://github.myenterprise.com/api/v3 \
  --param username myGitUser \
  --param repository myGitRepo \
  --param accessToken aaaaa1111a1a1a1a1a111111aaaaaa1111aa1a1a
  1. Create a trigger for the GitHub push event type by using your myGit/webhook feed.
wsk trigger create myGitTrigger --feed myGit/webhook --param events push

A commit to the GitHub repository by using a git push causes the trigger to be fired by the webhook. If there is a rule that matches the trigger, then the associated action will be invoked.

The action receives the GitHub webhook payload as an input parameter. Each GitHub webhook event has a similar JSON schema, but is a unique payload object that is determined by its event type.

For more information about the payload content, see the GitHub events and payload API documentation.