Is it possible to run a pipeline script on only the updated files in the pull request?

[Joseph Thayne]

I have a PHP project that i am wanting to add CodeSniffer (phpcs) to via a pipeline. I currently have it running unit tests, so I am not worried about getting it working generally. I will have no issues being able to run the code sniffer over all files. However, there are will over 1000 files in the project, so it will take a while to run. I would love to be able to run the sniffer only over those files that were changed in the pull request. Is there a way to do that? I can't seem to locate any information on this.

I have these two git commands that should give me what I am looking for, but haven't determined which is more consistent:

git diff --name-only HEAD...master

and

git --no-pager diff --name-only FETCH_HEAD $(git merge-base FETCH_HEAD master)

Any help on how to get that information inside a pipeline would be greatly appreciated. Thank you.

[mkleint]

You might want to check this bitbucket API that should return you the files changed in the pullrequest

https://developer.atlassian.com/bitbucket/api/2/reference/resource/repositories/%7Bworkspace%7D/%7Brepo_slug%7D/pullrequests/%7Bpull_request_id%7D/diffstat

in PR triggered builds you get the pull request's ID as environment variable - BITBUCKET_PR_ID (https://confluence.atlassian.com/bitbucket/variables-in-pipelines-794502608.html)