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What is this add-on for?

Submodule Changes for Bitbucket helps visualize modified lines of code in commits and pull requests for repositories with submodules.

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Submodule Changes for Bitbucket also gives an ability to watch Blame, leave comments on the entire pull request, a particular file, or on specific lines of code in a file for more convenient pull requests review. 

There are several exceptions when the app doesn't show changes committed to a submodule:

• When a submodule is placed not in the current Bitbucket instance
• When a submodule is just added or deleted in shown changes
• When there is a submodule conflict

Submodule Changes for Bitbucket includes a merge check Submodules fast-forward merge to ensure that all submodules can be merged to the default branch in fast-forward mode. If we didn't merge the submodule before merging the super-repository, we'd be able to do it afterward in fast-forward mode, and the link to the submodule will remain unchanged.

Merge-check must first be enabled in the project or repository settings.

Merge check restrictions:

• Merge check is performed only at the first level of a submodule, and nested submodules will not be checked
• Merge check only works for submodules hosted in Bitbucket it's been enabled in
• Merge check may skip submodules that are a part of truncated changes when the changes list is too big to be shown

How to install and configure the app?

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How to turn off the app for a certain submodule?

In some cases, the number of changes in a pull request with a submodule can exceed the page.max.changes limit. For instance, when a dependency on some large project is used as a submodule. That resulted in an incomplete displaying of changes in the pull request diff view.

To disable the Submodule Changes for Bitbucket app for a specific submodule in a repository, you need to add a special property in the .gitmodules file using the following Git command:

git config --file .gitmodules submodule.<name>.ignoreChanges true

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