NX Release - default value for {releaseGroupName} and {projectName}

[mfrieling]

In the NX Release recipe it says:

When using release groups in which the member projects are versioned together, you can also leverage {releaseGroupName} and it will be interpolated appropriately in the commit/tag that gets created for that release group.

This is problematic when you mixed release groups with some versioning member projects together and others individually. Then for the ones versioning individually, the {releaseGroupName} will rendered into the output (commit message, tag name, ...) as is. The same behavior applies to {projectName} when it cannot be interpolated, i. e. for releaseTagPattern of release groups versioning member projects together.

Defaulting them to an empty string if they cannot be interpolated doesn't work because that can lead to invalid results, i.e.

{"releaseTagPattern": "release/{projectName}/{version}"} // --> release//[interpolated-version]

A possible solution would be providing an optional default value separaed by : after the placeholder name: {placeholder-name:optional-default-string}

{"releaseTagPattern": "release/{projectName:my-project}/{version}"} // --> release/my-project/[interpolated-version]

If no default value is provided and the placeholder cannot be interpolated, they current behavior should be used.

[mfrieling]

This would apply to {packageName} or {customName} of #28519 as well.