The help page mentions

SpecsPaths

for this, which is exactly what I need; however, I'd like to either raise an exception or log an error if a glob doesn't expand to any source file. I have a custom

Target

with a custom field containing a list of globs, so I don't think I can take advantage of the unmatched_build_file_globs global option? 😕 I can solve this by doing

glob.glob

in plain Python (to expand a glob pattern and see if any files are found) and I could even do that with

async def

/

await

so that Python doesn't wait on a massive glob like

***/**

and can continue with the rest of the globs in the loop. However, it may make more sense to do with Pants engine instead?

specs parser is just: https://github.com/pantsbuild/pants/blob/15750dbd534028ee17b16401eb49cd79d8495896/src/python/pants/explorer/server/graphql/query/targets.py#L21