Webhooks

Your application can use webhooks to subscribe to events happening on your Aviator account.

When configuring a webhook, you can use the UI to choose which event actions will send you payloads. Only subscribing to the specific events you plan on handling limits the number of HTTP requests to your server. You can also subscribe to all current and future event actions. You can change the list of subscribed events anytime.

Each event corresponds to a certain set of actions that can happen on your organization’s repository. For example, if you subscribe to the merge failure event you'll receive detailed payloads every time a PR fails to merge.

PullRequest events

Payload

Each PullRequest webhook event payload contains the following properties.

KeyDescription

action

All webhook payloads contain an action property that contains the specific activity that triggered the event.

repository

Name of GitHub repository associated with the action.

organization

Name of the GitHub organization associated with the action.

pr_number

Integer. PR Number associated with the action.

author

GitHub handle of the author of the PR.

status

Current status of the PR. Valid options: open, pending, queued, blocked, merged

skip_line

Boolean. Represents whether the skip line label is present for the PR.

status_code

Integer. Represents the reason for failure, if there was a failure. See Status Codes section for all possible options.

status_code_text

String. Represents the reason for failure, if there was a failure. See Status Codes section for all possible options.

message

Optional. Present if there is an additional message provided by GitHub on the reason for failure.

failed_ci_list

Optional. List. List of CI names that failed in case of CI failure.

pr_reset_count

Optional. Integer. Number of PRs that were reset due to a reset. This property only exists in a reset action.

closed_bot_pr_count

Optional. Integer. Number of Bot PRs that were closed due to a reset. This property only exists in a reset action.

bot_pull_request

Optional. BotPR. This property only exists in a reset action that is caused by a test failure of a Bot PR.

Actions

Below is the list of actions that can be configured in the MQ UI to receive webhook events.

NameWhen it is triggered

opened

When the PR is opened.

labeled

When the Aviator trigger label was added to a PR.

queued

When the PR is queued. This typically happens when the PR is in an approved state and the Aviator trigger label is associated with the PR.

dequeued

When the Aviator label is manually removed from the PR. It is not reported in case of PR failing to merge.

top_of_queue

When the PR reaches the top of the queue for processing.

merged

When the PR is successfully merged.

blocked

When the PR fails to merge and is blocked. The typical reason for failures can be retrieved from status_code, including CI failure or merge conflict.

stuck

(Parallel mode only) When a PR is stuck if the original PR is still running the checks after the specified timeout.

reset

(Parallel mode only) When a parallel PR queue is reset.

BotPR

Below is the BotPR schema embedded in the payload.

KeyDescription

github_url

String. The GitHub URL to the Bot PR.

number

Integer. PR Number of the Bot PR.

head_branch_oid

String. The commit hash of the Bot PR.

Batch events

Batch events contain one or more PullRequests that are queued together in a single batch. These events are triggered regardless of configured batch_size.

Payload

KeyDescription

action

All webhook payloads contain an action property that contains the specific activity that triggered the event.

repository

Name of GitHub repository associated with the action.

organization

Name of the GitHub organization associated with the action.

pull_requests

A list of pull_requests associated with the batch. Each pull_request object contains pr_number, author, status, skip_line, status_code

message

Optional. Present if there is an additional message provided by GitHub on the reason for failure.

Actions

NameWhen it's triggered

batch_merged

When a batch of PRs are merged.

batch_failed

When a batch failed to merge.

batch_bisected

When a batch is bisected after a failure. Typically CI check failure in the batch PR would result in bisection when batch_size > 1

Config change event

This webhook is triggered when configuration for a repository is changed. To listen to these webhook events, subscribe to config_change webhook.

Sample payload

{
  "action": "config_change",
  "repository": {
    "name": "mergeit",
    "org": "aviator"
  },
  "history": {
    "modified_by": {
      "email": "email@email.com",
      "gh_username": "jainankit"
    },
    "modified_at": "2022-11-16T17:21:41.350499Z"
    "commit_sha": "85d419bbca585f04456083fd98b7858c0f1e4d13",
    "diff": "-     publish: \"always\"\n+     publish: \"ready\"",
  }
}

The modified_by property contains email and gh_username. If the config was modified from the Dashboard, email of the user would be present, and if the config was modified from the GitHub repo change, a gh_username would be present. commit_sha property may also be only present if the change was made from the GitHub repository.

Webhook Signatures

All webhooks sent by Aviator include a digest signature to verify that the webhook was sent by Aviator itself. The signature is included in a X-Aviator-Signature-SHA256 header and is calculated as the SHA256 of the webhook body using the Aviator account API token as the HMAC key.

In Python, this can be calculated as follows.

compare_signature.py
# The exact HTTP body of the webhook
message_body = "{...}"

# The Aviator API token associated with the account
api_token = "av_live_xxxyyyzzz"

# The signature received in the headers of the webhook request
received_signature = "bbbf25d449dc5f1101d36085b7913dfccce6a9307048ed110d4c70afd83eafd5"

import hashlib
import hmac

signature = hmac.new(
    api_token.encode(), message_body.encode(), hashlib.sha256
).hexdigest()

# Use compare_digest rather than == to prevent timing attacks.
if hmac.compare_digest(received_signature, signature):
    print("Signatures match!")
else:
    raise ValueError("Signatures do not match!")

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