Disable GVM GOPATH handling

gvm_disable_gopath_handling.go

// This Go script will disable annoying GVM GOPATH management.
// Based on https://github.com/e-nikolov/gvm repository
//
// MIT License

package main

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"os"
	"path/filepath"
)

func main() {
	if len(os.Args) != 2 {
		fmt.Println("Invalid number of arguments")
		os.Exit(1)
	}
	gvmHome := os.ExpandEnv(os.Args[1])
	gvmInstaller := filepath.Join(gvmHome, "binscripts", "gvm-installer")
	gvmDefault := filepath.Join(gvmHome, "scripts", "gvm-default")
	gvmEnvironments, err := filepath.Glob(filepath.Join(gvmHome, "environments", "*"))
	if err != nil {
		panic(err)
	}

	// ========

	for _, p := range append(gvmEnvironments, gvmInstaller) {
		data, err := ioutil.ReadFile(p)
		if err != nil {
			fmt.Println(err)
			os.Exit(1)
		}

		data = bytes.Replace(
			data,
			[]byte(`export GOPATH; GOPATH="`),
			[]byte(`# export GOPATH; GOPATH="`),
			-1,
		)

		f, err := os.Create(p)
		if err != nil {
			panic(err)
		}

		_, err = f.Write(data)
		if err != nil {
			panic(err)
		}

		err = f.Close()
		if err != nil {
			panic(err)
		}
	}

	// ========

	gdefault, err := ioutil.ReadFile(gvmDefault)
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}

	gdefault = bytes.Replace(
		gdefault,
		[]byte(`unset GOPATH`),
		[]byte(`# unset GOPATH`),
		-1,
	)

	f, err := os.Create(gvmDefault)
	if err != nil {
		panic(err)
	}

	_, err = f.Write(gdefault)
	if err != nil {
		panic(err)
	}

	err = f.Close()
	if err != nil {
		panic(err)
	}
}