"redundant inputs" failure when calling -I included User Op

[philrz]

Repro is with Zed commit 7ba4ecc.

The following all work ok.

$ zq -version
Version: v1.8.1-59-g7ba4ecc6

$ zq 'file sample.zng | count()'
31(uint64)

$ cat file_main.zed 
file sample.zng | count()

$ zq -I file_main.zed 
31(uint64)

$ cat file_in_op.zed
op CallMe(): (
  file sample.zng | count()
)
CallMe()

$ zq -I file_in_op.zed
31(uint64)

However, if I have just the User Op in my included Zed and attempt to make the call to it at the shell level, now I get an error.

$ cat file_in_op_no_call.zed
op CallMe(): (
  file sample.zng | count()
)

$ zq -I file_in_op_no_call.zed 'CallMe()'
redundant inputs specified: use either command-line files or a Zed source operator

I'd not be surprised if there's ways to trigger this that don't involve User Ops, but since I bumped into it accidentally while attempting some basic User Ops use cases, I'm opening it in that context.

[philrz]

Note to self: I called out this limitation in the User Ops docs, so make sure to remove that when this gets addressed.

[philrz]

It also should be noted that this problem doesn't show up with the lake, which I guess is unsurprising since zed query doesn't have the possible data input from a file to deal with.

$ zed -version
Version: v1.10.0-8-gda250959

$ zed -lake lake init
lake created: file:///Users/phil/work/zed-4701/lake

$ zed -lake lake create -use sample
pool created: sample 2WfdwOnwYrSk6ZoK3l9DyY9TRlU
Switched to branch "main" on pool "sample"

$ zed -lake lake load sample.zng 
(2/1) 4910B/4910B 4910B/s 100.00%
2WfdxViHlMToPMlRmxYbeQnkNkt committed

$ cat from_in_op_no_call.zed
op CallMe(): (
  from sample | count()
)

$ zed -lake lake query -I from_in_op_no_call.zed 'CallMe()'
31(uint64)

[philrz]

Verified in Zed commit e03665e.

I can now reference just the User Op that's in my included Zed and can make the call to it at the shell level without error.

$ zq -version
Version: v1.10.0-20-ge03665e6

$ cat file_in_op_no_call.zed
op CallMe(): (
  file sample.zng | count()
)

$ zq -I file_in_op_no_call.zed 'CallMe()'
31(uint64)

I've opened #4831 to update the docs.

Thanks @mattnibs!