CI warning: "Failed to write to remote cache (1 occurrences so far): Declared output directory path RelativePath("3rdparty/tools/act/act") in output digest ... contained a file instead."

[huonw]

Describe the bug

Test shard 4 in CI currently has a warning:

[WARN] Failed to write to remote cache (1 occurrences so far): Declared output directory path RelativePath("3rdparty/tools/act/act") in output digest Digest { hash: Fingerprint<266c7e02f8705703f1c3df8f3dc12719ef360d5b945b04108cd675f2db6df8d5>, size_bytes: 82 } contained a file instead.

https://github.com/pantsbuild/pants/actions/runs/6216412029/job/16870266029#step:11:243

We can fix the specific instance, but the problem here should be caught earlier than uploading to remote source, probably:

pants/3rdparty/tools/act/BUILD

Lines 38 to 44 in a064a6b

	shell_command(
	name="extracted-act",
	command="tar -xf act.tar.gz",
	tools=["tar", "gzip"],
	execution_dependencies=[":downloaded-act"],
	output_directories=["act"],
	)

Pants version

main a064a6b

OS
Linux

Additional info
N/A