Unable to build protobuf to go endpoint

Solution 1:

protoc-gen-go needs to be in your shell path, i.e. one of the directories listed in the PATH environment variable, which is different from the Go path. You can test this by simply typing protoc-gen-go at the command line: If it says "command not found" (or similar) then it's not in your PATH.

Solution 2:

Using

$ go get -u github.com/golang/protobuf/{proto,protoc-gen-go}

is more safe than using

$ sudo apt-get install golang-goprotobuf-dev

Because the latest protoc-gen-go is using the lib github.com/golang/protobuf/proto, but protoc-gen-go in apt-get using the lib code.google.com/p/goprotobuf/proto which didn't exist now.

Solution 3:

You should properly define your GO_PATH - where your go packages live. In other words, GO_PATH is your go workspace. The GO_PATH should be ~/go.
protoc-gen-go should be in your PATH. While protoc-gen-go lives in $GO_PATH/bin after you installed it.

Add these 2 important lines to your ~/.bash_profile:

export GO_PATH=~/go
export PATH=$PATH:/$GO_PATH/bin

Then you need to start a new shell session or just type in this line:

$ source ~/.bash_profile

Solution 4:

On Ubuntu 18.04, this is verified working to solve this issue:

sudo apt-get install golang-goprotobuf-dev

Solution 5:

I have Ubuntu 18.04.02 LTS and installed protoc using

sudo apt install protobuf-compiler

I have my GOPATH and GOBIN set correctly, but still when I did a protoc --go_out=. <filename> I was getting

protoc-gen-go: program not found or is not executable
--go_out: protoc-gen-go: Plugin failed with status code 1.

After reading bunch of places, was able to find that doing

go get -u github.com/golang/protobuf/protoc-gen-go

was able to fix the issue. Hope this helps someone out there.