Build not triggered on Merge Request Approval in Gitlab

[evgeny-sureev]

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Which mobile framework are you using?

iOS (Swift, Objective-C)

Steps to reproduce

I have set up webhooks to be triggered by updates on merge requests.
Upon creation and for updates to MR, tests are run. This workflow works.
On MR approval I have set up building and deploying test build. This workfow does not triggers at all.

Sample workflow:

workflows:
  approve_me:
    name: MR Approval test
    max_build_duration: 120
    instance_type: mac_mini_m2
    triggering:
      events:
        - pull_request
      cancel_previous_builds: true
    when:
      condition: event.object_attributes.action == "approved"
    scripts:
      - name: "MR got approval"
        script: echo "SUCCESS"

Expected results

On MR approval workflow starts.

Actual results

Workflow does not start, in "Recent deliveries" section there are delivery with text "Welcome to Codemagic! Your builds will be started on branch push".

Build id (optional)

No response

[dam-ease]

Hello @evgeny-sureev,
To trigger the build after the pull request has been merged, you can target the destination branch. Setting source:true, pattern:main will trigger the build on the main branch once the pull request has been merged from the feature branch into the main branch.

triggering:
  events:
    - push
    - pull_request
  branch_patterns:
    - pattern: 'main'
      include: true
      source: true 

The above pattern is set for the main branch but you can set similar patterns for any branch depending on your workflow.

[evgeny-sureev]

Hello. I want to trigger build not after merging, but after approval of merge request.

[dam-ease]

Hello,
Apologies for the delayed response.
There seems to be currently no support for triggering workflows based on the approval of merge requests. If you check the "Recent Deliveries" section of your webhook settings, the pull_request.approve event doesn't get sent when a pull request is approved. Can you check this out to confirm on your end as well? If you have otherwise, kindly share a screenshot of what you have under this section when you approve a pull request.

[evgeny-sureev]

Here is screenshot. I circled in red "action": "approved" it is here, so why check event.object_attributes.action == "approved" does not work?

[dam-ease]

Hello @evgeny-sureev,
I want to give an update here, I'm currently investigating this as it seems the behavior is a bit different seeing that merge_request is the case in GitLab compared to others pull_request. I'll be sure to update you as soon as possible, please.

[dam-ease]

Hello @evgeny-sureev,
An update here, the case is the same with Gitlab and Github, and checking in on this, Pull Request/Merge Request approval event isn't the event Codemagic recognizes at the moment, the same is the case for PR comment, PR close, RP review requested, etc. Only a limited number of webhooks events: for example: push to a branch, push of a tag, open a pull_request and a push to a pull_request are currently supported as mentioned here:
https://docs.codemagic.io/yaml-running-builds/starting-builds-automatically/#build-triggers

[evgeny-sureev]

Sad news. Thank you for help.