go_sample.sh does not work with recent versions of Go

[jdemeyer]

With current flatbuffers master and Go 1.20, I tried to run go_sample.sh but it doesn't work because of Go's now mandatory module system:

12:20 ~/src/flatbuffers/samples $ sh go_sample.sh 
Compiling and running the Go sample.
sample_binary.go:22:2: package MyGame/Sample is not in GOROOT (/usr/lib/go/src/MyGame/Sample)
sample_binary.go:24:2: no required module provides package github.com/google/flatbuffers/go: go.mod file not found in current directory or any parent directory; see 'go help modules'
go_sample.sh: line 58: ./go_sample: No such file or directory
rm: cannot remove 'go_sample': No such file or directory

It's also obviously related to #7783 @le-michael

[le-michael]

The go.mod file was removed after I attempted to add it for the go library (#7720). The go sample was last updated 7 years ago and isn't a part of the CI so we probably didn't catch the go.mod requirement change.

We have a go example that was written recently feel free to experiment with that.
https://github.com/google/flatbuffers/tree/master/examples/go-echo