Integration With Repository Hosting Services

Applies to Collaborator 14.5, last modified on May 06, 2024

Collaborator integrates with popular repository hosting services like GitHub, GitLab, Bitbucket or Azure DevOps. It automatically creates and updates reviews when changes occur in repositories hosted in these systems. This simplifies the process of review creation and help you make reviewing an integral part of your workflow.

This topic describes how the integration works.

Supported Hosting Services

Collaborator integrates with the following repository hosting services. It supports both online and installable editions:

  • GitHub ( and GitHub Enterprise)

  • GitLab (, GitLab Community, and GitLab Enterprise editions)

  • Bitbucket (, Bitbucket Server and Bitbucket Data Center)

  • Azure DevOps (, and Azure DevOps Server)

LFS is NOT supported for remote systems (supported for native Git only).

Set Up Integration Settings

To integrate Collaborator with repository hosting services, you need to configure settings of Collaborator and set certain options on the hosting service side. For complete information, follow these links:

How Integration Works

The integration works similarly for all the supported hosting services:

  • When you integrate Collaborator with a repo, Collaborator creates a webhook on the repo side.

  • When changes occur in the repo, the webhook sends notifications to Collaborator, and the latter automatically creates reviews for these changes, and attaches the changed files to it.

  • Collaborator tracks further changes in the repository and uploads newer file versions to the review until the corresponding pull request is closed (in some systems, pull requests are called merge requests). It can also close the pull/merge request automatically, if you complete the review.

See below for detailed information on all these actions.

When a review is created

After you configured integration settings, Collaborator tracks changes in one or several branches of your repository (you specify the branches to track and to ignore when configuring integration settings in Collaborator).

Collaborator automatically creates reviews in the following cases:

  • When it detects a pull request to the tracked branch (in some systems, pull requests are called merge requests).

  • When it detects push events (commits, not pull requests) to the tracked branch.

Collaborator uploads the copies of changed files to the review and assigns the review to the respective user. On the repository side, it registers the review as a CI test for the pull request (in GitHub terms, these are called status checks, in GitLab — pipelines, in Bitbucket and Bitbucket Server — builds). So, you can see the status of the created review in the pull request details:

See examples

For protected branches, you have to complete Collaborator reviews before closing the pull request.

Collaborator also automatically creates reviews for changes in submodules (or subrepositories). See below.

What data the review contains

The new review includes changes made to the remote repository. Namely —

  • When creating a new review, Collaborator automatically uploads copies of the pull request’s or commit’s files to the review. That is, the review contains the modified files, not the file links or commit IDs. You can see these files in the Review Materials section of the review.

  • The Remote System Links section contains the links to pull requests or commits, as well as their current statuses.

  • The Pull Request Merge Info section allows to check and change what action will be performed with pull request when current review will be accomplished.

  • The Chat section would display a link to the remote repository, names of pull request branches, pull request description (if provided) and comments that users made to pull request/commit on the remote repository side.

An example of review created on changes in GitHub repository

Click the image to enlarge it.

The initial phase of the newly created review will be Planning, so authors could check the review, add notes or upload additional materials before notifying other participants. Alternatively, Collaborator administrators can enable the Move pull request reviews to Inspection setting to start reviews automatically. In this case Collaborator will verify if the review meets the workflow requirements (for example, has minimal number of participants) and will move it to the Inspection phase on success.

Whom the review is assigned to

When Collaborator gets a notification about changes in a repository, it also retrieves information about the source-control user, who made these changes. So, it attempts to find a corresponding user in Collaborator to assign the new review to that user. In order for the search to be successful, you and your teammates need to link their Collaborator and source-control accounts in Collaborator settings. See Link User Accounts for details.

  • For direct commits, Collaborator retrieves the commit author from the source-control and assigns the matching Collaborator user as a review author and creator.

  • For pull/merge requests Collaborator tries to obtain information about its author from the source-control and assigns the matching Collaborator user as a review author and creator. Some repository hosting services do not provide e-mail addresses of pull request authors, even when source-control users made them public. Thus Collaborator could fail to find a user matching to pull request author. In this case Collaborator retrieves the author of pull request’s last commit and assigns the matching Collaborator user as a review author and creator.

If Collaborator does not find any matching user, it assigns the Collaborator administrator as a review author and creator.

Additionally, Collaborator can assign reviewers in the following cases:

  • GitHub, GitLab: If repository contains a CODEOWNERS file that defines users responsible for certain files in a repository and integration can match those GitHub/GitLab users with Collaborator users,
  • GitHub: If some team was added as reviewer when creating pull request on the GitHub side, or some team was specified in CODEOWNERS file and integration can match members of that team with Collaborator users, and the Auto assign reviewers option is on.
  • Bitbucket, Bitbucket Server: If some specific users were added as reviewers when creating pull request on the Bitbucket side and integration can match those Bitbucket users with Collaborator users.
  • Github, Gitlab, Bitbucket, Bitbucket Server, Azure DevOps: If some specific users were added as reviewers when creating pull request on the remote system side and integration can match those remote system users with Collaborator users, and the Auto assign reviewers option is on.

When further commits are made

  • If a review was created for a pull request

    If your teammates make more changes to the branch after a review was created, and if the pull request is not closed, Collaborator uploads new file versions to the created review. This works until the pull request is closed. If the review remains open after the pull request is closed, then Collaborator will not upload files from subsequent commits to the review.

  • If a review was created for a commit (push event)

    Collaborator will not upload new file versions to the review automatically.

When files conflict

By default the integration does not allow to complete a review when the respective pull request has some conflicts. This behavior is controlled by the Allow to complete review with conflicts in pull request setting.

If a file conflict can be resolved automatically, Collaborator will not add any new file copies to the review. If a file conflict needs to be resolved manually (that is, if some files are to be changed to complete the merge request), then Collaborator will update the review with newer file versions.

Note: If Collaborator’s User Preferences > Default Revision Comparison of Diff Viewer option is set to “Branch Only”, changes from merge commits will not be displayed in Diff Viewer.

When merge commit was added

... file changes made by merge commits will only be displayed in Separate view of the Review Materials section of the review. They will not be displayed in Overlay view. Besides, file changes made by merge commits are not taken into account when calculating overall LOC metrics and they do not affect the overall rework count of a file.

When commit history is modified (rebasing or squashing commits) ...

... Collaborator will process the outdated commits and will reorder the list of file revisions to keep it up-to-date.

  • If some file revisions have been removed, the comments or defects addressing that file revision will be promoted to resulting revision and will display a special icon indicating that the comment/defect could be outdated.
  • If some files have been removed, they will also be removed from the review materials. For audit purposes, comments and defects for removed files will be copied to the review's general chat.

When the review is completed ...

... Collaborator can automatically merge, squash or rebase changes. This behavior is controlled by the When review completed option and by the current merge strategy selected in the Pull Request Merge Info section:

Pull Request Merge Info section in Web Client

Click the image to enlarge it.

If integration fails to automatically merge pull request, it notifies the authors of the respective review, so they can resolve the issue manually.

When a review is completed and pull request is updated ...

... the review can be reopened. The Reopen a review when option allows selecting what events should reopen the review.

When the review is canceled, deleted or rejected ...

... Collaborator can automatically close the corresponding pull request. Additionally, it can automatically delete the corresponding branch. This behavior is controlled by the When Review Cancelled/Deleted/Rejected option that you set when integrating Collaborator with your repository.

When the pull request is closed or deleted ...

... Collaborator posts a comment and closes the corresponding review. Reviews in planning phase will be deleted, while in progress reviews will be cancelled.

For review with multiple linked pull requests all of them should be closed or deleted.

When the pull request is reopened

It is quite possible, that the pull request, for which a review was created, is reopened after that review was completed. In this case, Collaborator will reopen the review.

If review was canceled, deleted or rejected and if the pull request is reopened, Collaborator creates a new review.


  • By default, webhooks do not use SSL. This is done intentionally, in order to avoid handshake issues with self-signed or untrusted certificate authority (CA) root certificates on the Collaborator side. To enable SSL verification for existing webhooks, modify them on the repository server side (for more information on this, see your hosting service documentation). To enable SSL verification for all new webhooks, use the -Dcom.smartbear.collab.datamodel.remotesystem.webhooks.ssl.enable=true Java VM Option.

  • Collaborator creates reviews for any pull requests, including those that came from forked repositories.

  • If your repo contains a Git submodule, Collaborator will also create review for changes in submodule files.

    At that, the commits that add a new submodule, or remove an existing submodule will be represented as changes in the .gitmodules file. Other changes in the submodule folder will be ignored in this commit. Once submodule has been added, further changes in its files will be displayed as file changes in the submodule folder.

    Submodules must belong to the same owner/project/organization.

  • In order to decrease number of calls to repository hosting servers, Collaborator caches some of the most often retrieved entities from APIs (commits, pull request diffs, commit diffs). By default cache contains up to 20000 entities for each active remote system integration. To change the default cache size or disable caching, use the server's -Dcom.smartbear.collab.datamodel.remotesystem.cache.sizeJava VM Options.

    Usage statistics of cache and all outgoing API calls from Collaborator could be found in the remoteSystemApi.log when the debug logging level is enabled as described in Enable remote system logging section of Logging.

  • Currently, Collaborator incorrectly displays non-Latin characters in pull request names, branch names, and in pull request descriptions.

See Also

Source Control Integrations

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