Failed to process proto source files.: given files include multiple copies of "common.proto" starting with v1.8.8

[mariemat]

When I execute a grpcurl command to execute a call, and I provide multiple proto files that each import the same common.proto, then I get the error :

Failed to process proto source files.: given files include multiple copies of "common.proto" 

This happens only with 1.8.8 (not with 1.8.6, nor 1.8.7)
I believe this is common for multiple proto files to import the same utilities, and grpcurl should not enforce that condition

[jhump]

I believe this is common for multiple proto files to import the same utilities

@mariemat, multiple proto files merely importing the same other files wouldn't be the issue. Something else is going awry that causes the same file to be processed 2x (and just importing a file doesn't cause it to be re-processed).

Could you provide more details about the actual command-line arguments you are providing and perhaps a snippet (mainly the precise import statements) from at least two of the files that import "common.proto"?

Also, could you try installing the latest from head (go install github.com/fullstorydev/grpcurl@master) to see if this still occurs? (It's possible this may have been fixed in #416.)

[mariemat]

Thanks @jhump,

I checked with grpcurl version "v1.8.8-2-g7a845ca" (#416) and I do see the same error.

There is not trick around the imports.
The hierarchy of import is like (sorry I can not share a lot):

• g.proto
  • n.proto
    • common.proto
    • k.proto
      • common.proto

The g.proto and 'common.proto' are provided on the cli with many more, but only those described here are involved with common.proto.

If I remove the common.proto from the CLI params, then it does work (with all versions).

[jhump]

If I remove the common.proto from the CLI params, then it does work (with all versions).

Ah. What does the actual import line look like then? I suspect you have a mismatch between the relative path used on the command-line and the import statements in referring files. So the tool doesn't know that the two paths are the same file and thus tries to load both.

The changes I mentioned (in #416) should have helped to match the behavior of the older versions more closely. But if they did not, then can you provide more info about:

1. The actual command-line arguments you are providing. In particular, what are the -proto and -import-path values you are sending. (Anonymized like above, to not reveal details of your codebase/schema is fine.)
2. The actual layout on disk of the relevant source files. Are they all in a single tree with one import path, split across directories with multiple import paths, etc. Showing the absolute paths for each file in the schema (anonymized of course) would help.

[iwittkau]

I got the same error.

I think the reason is that grpcui now resolves all imported proto packages from -import-path.

Example:

example
├── service1
│   └── service1.proto # imports service2/service2.proto
└── service2
    └── service2.proto

If you now run grpcui like this

cd example
grpcui -import-path=. \
    -proto=service1/service1.proto \ 
    -proto=service2/service2.proto \ 
    host:port

it will produce the output:

Failed to process proto source files.: given files include multiple copies of "service2/service2.proto"

Not sure if this is intended behavior, but the workaround for now is to remove -proto=service2/service2.proto flag.

[jhump]

Not sure if this is intended behavior

Definitely not. That is surprising that so simple an example triggers it with the latest (merged but unreleased) code, given the tests I added to the underlying function in protoreflect 😕. I'll see if I can repro the issue with the suggested layout and arguments and debug a little further if so.