I'm hitting a confusing interaction between filtering targets with

--changed-since

and piping it's output to another command with

--spec-files

. If your only working dir change is a BUILD file change, these two commands yield different results:

$ pants --changed-since=HEAD lint    # runs linter on the BUILD file and sources mapped inside

$ pants --changed-since=HEAD list > changed_targets.txt 
$ pants --spec-files=changed_targets.txt lint   # runs linter only on source mapped inside changed BUILD FILE, but not the BUILD file itself

Is this expected?

That doesn't sound expected. Would you mind opening an issue with a brief example? ex: where you

echo

some text to a BUILD file in https://github.com/pantsbuild/example-python