So, we have a project where duplicate code is getting identified. It is actually not an unreasonable use-case so we’d like to exempt that file from that metric without having to adjust the threshold for the entire project?
In Narrowing the Focus page, you can have a general look at all ways the scope of the analysis can be configured. As written there:
You can prevent some files from being checked for duplications.
To do so, go to Project Settings > General Settings > Analysis Scope > Duplications and set the Duplication Exclusions property. See the Patterns section for more details on the syntax.