Protobuf: .pb.go import error: local import "." in non-local package

[ayrb13]

I wrote some proto files that one import others.
like this:
package myproto;
import "a.proto";
import "b.proto";
import "c.proto";
import "d.proto";
import "e.proto";
these files are all in package myproto;

When I generated pb.go files and import "myproto"
go compiler told:
import cycle not allowed
package .
imports myproto
imports .
imports .
echo.go:5:2: local import "." in non-local package

Is it a bug of protoc-gen-go?

[dsymonds]

If foo.proto imports bar.proto, they need to generate code in different Go packages, or else be run through protoc together. What commands did you run to get the generated .pb.go files?

[ayrb13]

protoc --go_out=. a.proto
protoc --go_out=. b.proto
protoc --go_out=. c.proto
protoc --go_out=. d.proto
protoc --go_out=. e.proto

I did similar script when i generated cpp files?
How to "be run through protoc together"

thanks for your reply

[dsymonds]

You haven't told protoc-gen-go how to map a.proto to a Go import path, which is why it ended up with a dot. Try protoc --go_out=. a.proto b.proto c.proto d.proto e.proto, or put them in different directories, or use the M parameter (carried in the --go_out flag) to specify what it should do.

[ayrb13]

I did what you told me to do and It works now, thank you very much

[icexin]

@dsymonds How to use the M parameter? I have two proto files: a.proto with package a and b.proto with package b, a.proto imports b. proto. When compiled with protoc --go_out=. a.proto b.proto, protoc failed with inconsistent package names: a b. Thanks!

[dsymonds]

If you've got two proto files that are going into the same package (implied by passing them on the command line together), they need to have the same package name.

[alecthomas]

Also see #39.