gogo.proto: File not found

protoc --gogofaster_out=. image.proto

I get this error message

>/home/abc/src/github.com/gogo/protobuf/gogoproto/gogo.proto: File not found.
>
>image.proto: Import "/home/abc/src/github.com/gogo/protobuf/gogoproto/gogo.proto" was not found or had errors.

The file is definitely there. I can reach it from the reported path in the error.

My proto file looks like this:

package image;

import "/home/abc/src/github.com/gogo/protobuf/gogoproto/gogo.proto";

message Frame {
required bool fragment = 1; 
required int32  fragmentID = 2; 
required bool lastFragment = 3; 
required bytes data = 4;
}

I have a Makefile in the dir where the proto file is. Looks like this:

regenerate:
--proto_path=../../github.com/gogo/protobuf/gogoproto:../../github.com/gogo/protobuf/protobuf/google/protobuf:. --gogofaster_out=. *.proto

What can I do to resolve the path error?

As in this issue, you could try and import only the relative path:

import "github.com/gogo/protobuf/gogoproto/gogo.proto";

Make sure that GOPATH is set to /home/abc first.

I mention protobuf PR 241, where the makefile defines the PATH to use:

regenerate: 
  protoc-min-version --version="3.0.0" 
    --proto_path=$(GOPATH)/src/image:
                 $(GOPATH)/src/github.com/go‌​go/protobuf/protobuf‌​:
                 $(GOPATH)/src/githu‌​b.com/gogo/protobuf/‌​protobuf/google/prot‌​obuf:
                 . --gogo_out=. *.proto 

The OP mention this thread, which points out:

> The dependencies call other dependencies in "google/protobuf/", so these need to be in the path correctly also.
The errors are pretty misleading

> Also when using gogoproto extensions you should use gogofast_out.
gofast_out is only for when you are not using any extensions, but want some extra speed.
gogofast_out / gofast_out has no side effects.
gogofaster_out makes most fields nullable=false.

1. Run <code>go get -u github.com/gogo/protobuf</code> to download the dependencies to local directory <code>$GOPATH/pkg/mod</code>
2. Run <code>go mod vendor</code> to packaging your module dependencies. After execute this cmd, there should be a directory "vendor" in your project and shall be referred in the Makefile.

The Makefile command should be:

regenerate: 
    protoc-min-version --version="3.0.0" \
    --proto_path=$(GOPATH)/src/image \
    -I vendor/github.com/go‌​go/protobuf/protobuf‌​ \
    -I vendor/githu‌​b.com/gogo/protobuf/‌​protobuf/google/prot‌​obuf \
    -I. --gogo_out=. *.proto 

Here, --pro_path and -I are the same.<br>
In case the absolute path contains variable then the pattern should be:<br>

-I=${path_variable}/a/sample \
-I=${path_variable}/b/sample \

Hope this might help someone!

You need to specify the gogo.proto directory to search for imports using --proto_path parameter.

protoc --go_out=. --go_opt=paths=source_relative \
--go-grpc_out=. --go-grpc_opt=paths=source_relative \
path/to/your/target/protofile --proto_path=$GOPATH/src/ --proto_path=.