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:title: GitHub Driver
GitHub
======
The GitHub driver supports sources, triggers, and reporters. It can
interact with the public GitHub service as well as site-local
installations of GitHub enterprise.
.. TODO: make this section more user friendly
Configure GitHub `webhook events
<https://developer.github.com/webhooks/creating/>`_.
Set *Payload URL* to
``http://<zuul-hostname>/connection/<connection-name>/payload``.
Set *Content Type* to ``application/json``.
Select *Events* you are interested in. See below for the supported events.
Connection Configuration
------------------------
There are two forms of operation. Either the Zuul installation can be
configured as a `Github App`_ or it can be configured as a Webhook.
If the `Github App`_ approach is taken, the config settings ``app_id`` and
``app_key`` are required. If the Webhook approach is taken, the ``api_token``
setting is required.
The supported options in ``zuul.conf`` connections are:
.. attr:: <github connection>
.. attr:: driver
:required:
.. value:: github
The connection must set ``driver=github`` for GitHub connections.
.. attr:: app_id
App ID if you are using a *GitHub App*. Can be found under the
**Public Link** on the right hand side labeled **ID**.
.. attr:: app_key
Path to a file containing the secret key Zuul will use to create
tokens for the API interactions. In Github this is known as
**Private key** and must be collected when generated.
.. attr:: api_token
API token for accessing GitHub if Zuul is configured with
Webhooks. See `Creating an access token for command-line use
<https://help.github.com/articles/creating-an-access-token-for-command-line-use/>`_.
.. attr:: webhook_token
Required token for validating the webhook event payloads. In
the GitHub App Configuration page, this is called **Webhook
secret**. See `Securing your webhooks
<https://developer.github.com/webhooks/securing/>`_.
.. attr:: sshkey
:default: ~/.ssh/id_rsa
Path to SSH key to use when cloning github repositories.
.. attr:: server
:default: github.com
Hostname of the github install (such as a GitHub Enterprise).
.. attr:: canonical_hostname
The canonical hostname associated with the git repos on the
GitHub server. Defaults to the value of :attr:`<github
connection>.server`. This is used to identify projects from
this connection by name and in preparing repos on the filesystem
for use by jobs. Note that Zuul will still only communicate
with the GitHub server identified by **server**; this option is
useful if users customarily use a different hostname to clone or
pull git repos so that when Zuul places them in the job's
working directory, they appear under this directory name.
.. attr:: verify_ssl
:default: true
Enable or disable ssl verification for GitHub Enterprise. This
is useful for a connection to a test installation.
Trigger Configuration
---------------------
GitHub webhook events can be configured as triggers.
A connection name with the GitHub driver can take multiple events with
the following options.
.. attr:: pipeline.trigger.<github source>
The dictionary passed to the GitHub pipeline ``trigger`` attribute
supports the following attributes:
.. attr:: event
:required:
The event from github. Supported events are:
.. value:: pull_request
.. value:: pull_request_review
.. value:: push
.. attr:: action
A :value:`pipeline.trigger.<github source>.event.pull_request`
event will have associated action(s) to trigger from. The
supported actions are:
.. value:: opened
Pull request opened.
.. value:: changed
Pull request synchronized.
.. value:: closed
Pull request closed.
.. value:: reopened
Pull request reopened.
.. value:: comment
Comment added to pull request.
.. value:: labeled
Label added to pull request.
.. value:: unlabeled
Label removed from pull request.
.. value:: status
Status set on commit.
A :value:`pipeline.trigger.<github
source>.event.pull_request_review` event will have associated
action(s) to trigger from. The supported actions are:
.. value:: submitted
Pull request review added.
.. value:: dismissed
Pull request review removed.
.. attr:: branch
The branch associated with the event. Example: ``master``. This
field is treated as a regular expression, and multiple branches
may be listed. Used for ``pull_request`` and
``pull_request_review`` events.
.. attr:: comment
This is only used for ``pull_request`` ``comment`` actions. It
accepts a list of regexes that are searched for in the comment
string. If any of these regexes matches a portion of the comment
string the trigger is matched. ``comment: retrigger`` will
match when comments containing 'retrigger' somewhere in the
comment text are added to a pull request.
.. attr:: label
This is only used for ``labeled`` and ``unlabeled``
``pull_request`` actions. It accepts a list of strings each of
which matches the label name in the event literally. ``label:
recheck`` will match a ``labeled`` action when pull request is
labeled with a ``recheck`` label. ``label: 'do not test'`` will
match a ``unlabeled`` action when a label with name ``do not
test`` is removed from the pull request.
.. attr:: state
This is only used for ``pull_request_review`` events. It
accepts a list of strings each of which is matched to the review
state, which can be one of ``approved``, ``comment``, or
``request_changes``.
.. attr:: status
This is used for ``pull-request`` and ``status`` actions. It
accepts a list of strings each of which matches the user setting
the status, the status context, and the status itself in the
format of ``user:context:status``. For example,
``zuul_github_ci_bot:check_pipeline:success``.
.. attr:: ref
This is only used for ``push`` events. This field is treated as
a regular expression and multiple refs may be listed. GitHub
always sends full ref name, eg. ``refs/tags/bar`` and this
string is matched against the regular expression.
Reporter Configuration
----------------------
Zuul reports back to GitHub via GitHub API. Available reports include a PR
comment containing the build results, a commit status on start, success and
failure, an issue label addition/removal on the PR, and a merge of the PR
itself. Status name, description, and context is taken from the pipeline.
.. attr:: pipeline.<reporter>.<github source>
To report to GitHub, the dictionaries passed to any of the pipeline
:ref:`reporter<reporters>` attributes support the following
attributes:
.. attr:: status
String value (``pending``, ``success``, ``failure``) that the
reporter should set as the commit status on github.
.. TODO support role markup in :default: so we can xref
:attr:`webapp.status_url` below
.. attr:: status-url
:default: webapp.status_url or the empty string
String value for a link url to set in the github
status. Defaults to the zuul server status_url, or the empty
string if that is unset.
.. attr:: comment
:default: true
Boolean value that determines if the reporter should add a
comment to the pipeline status to the github pull request. Only
used for Pull Request based items.
.. attr:: merge
:default: false
Boolean value that determines if the reporter should merge the
pull reqeust. Only used for Pull Request based items.
.. attr:: label
List of strings each representing an exact label name which
should be added to the pull request by reporter. Only used for
Pull Request based items.
.. attr:: unlabel
List of strings each representing an exact label name which
should be removed from the pull request by reporter. Only used
for Pull Request based items.
.. _Github App: https://developer.github.com/apps/
Requirements Configuration
--------------------------
As described in :attr:`pipeline.require` and :attr:`pipeline.reject`,
pipelines may specify that items meet certain conditions in order to
be enqueued into the pipeline. These conditions vary according to the
source of the project in question. To supply requirements for changes
from a GitHub source named ``my-github``, create a congfiguration such
as the following::
pipeline:
require:
my-github:
review:
- type: approval
This indicates that changes originating from the GitHub connection
named ``my-github`` must have an approved code review in order to be
enqueued into the pipeline.
.. attr:: pipeline.require.<github source>
The dictionary passed to the GitHub pipeline `require` attribute
supports the following attributes:
.. attr:: review
This requires that a certain kind of code review be present for
the pull request (it could be added by the event in question).
It takes several sub-parameters, all of which are optional and
are combined together so that there must be a code review
matching all specified requirements.
.. attr:: username
If present, a code review from this username is required. It
is treated as a regular expression.
.. attr:: email
If present, a code review with this email address is
required. It is treated as a regular expression.
.. attr:: older-than
If present, the code review must be older than this amount of
time to match. Provide a time interval as a number with a
suffix of "w" (weeks), "d" (days), "h" (hours), "m"
(minutes), "s" (seconds). Example ``48h`` or ``2d``.
.. attr:: newer-than
If present, the code review must be newer than this amount of
time to match. Same format as "older-than".
.. attr:: type
If present, the code review must match this type (or types).
.. TODO: what types are valid?
.. attr:: permission
If present, the author of the code review must have this
permission (or permissions). The available values are
``read``, ``write``, and ``admin``.
.. attr:: open
A boolean value (``true`` or ``false``) that indicates whether
the change must be open or closed in order to be enqueued.
.. attr:: current-patchset
A boolean value (``true`` or ``false``) that indicates whether
the item must be associated with the latest commit in the pull
request in order to be enqueued.
.. TODO: this could probably be expanded upon -- under what
circumstances might this happen with github
.. attr:: status
A string value that corresponds with the status of the pull
request. The syntax is ``user:status:value``.
.. attr:: label
A string value indicating that the pull request must have the
indicated label (or labels).
.. attr:: pipeline.reject.<github source>
The `reject` attribute is the mirror of the `require` attribute. It
also accepts a dictionary under the connection name. This
dictionary supports the following attributes:
.. attr:: review
This takes a list of code reviews. If a code review matches the
provided criteria the pull request can not be entered into the
pipeline. It follows the same syntax as
:attr:`pipeline.require.<github source>.review`