In the example-python, if I modify

helloworld/translator/translator.py

and run:

❯ ./pants --changed-since=HEAD --changed-dependees=direct list
helloworld/greet/greeting.py:lib
helloworld/translator/translator.py:lib
helloworld/translator/translator_test.py:tests

The

greeting.py

is reported as changed because it depends on `translator.py`:

❯ ./pants paths --from=helloworld/greet/greeting.py --to=helloworld/translator/translator.py   
[
  [
    "helloworld/greet/greeting.py:lib",
    "helloworld/translator/translator.py:lib"
  ]
]

Is it possible when asking for changed targets to tell Pants to ignore certain areas of the dependency graph, e.g. "pretend" that the only source location is

helloworld/greet

? With this limit set, there would be no changes reported as

helloworld/translator

is not taken into account. The

list --filter-address-regex=...

filters the output only, not the "discoverable" targets. The

--source-root-patterns=[]

doesn't seem to work either, I am not sure if that's even valid to set roots at runtime? 😕

it looks plausible to do a few

./pants dependees

calls to determine who depends on what and then do filtering in multiple

./pants

calls, but was hoping to get a more concise solution?

yes, you got it right in the issue, Eric. It's not the filtering of the output targets that I am interested in, but rather filtering what locations Pants should explore when searching for dependencies. Some kind of patching of what are dependencies of some target are at runtime.

With

->

indicating "importing from", e.g.

file2.py

imports from

file1.py

dir1/
  file2.py -> file1.py
  file1.py (with changes made) -> main.py
  main.py -> dir2/lib.py
dir2/
  lib.py (with changes made)

Running

./pants --changed-since=HEAD --changed-dependees=direct list --option-setting-roots-locations="dir1/"

should report

file1.py

and

file2.py

only

Perhaps we could rephrase the question to be: "Can Pants tell me the changed files considering dependencies only within a single target?" i.e.

dir1/BUILD/python_sources()

only target