Project Fails Compile outside of GOPATH

[bheatwole]

Expected Behaviour

If a project is created outside of the GOPATH and 'go mod init' is used, gqlgen should work.

Actual Behavior

gqlgen must be run from inside your $GOPATH
exit status 1

Steps to reproduce

aaaf94315952:~$ go version
go version go1.11.5 linux/amd64
aaaf94315952:~$ export GOPATH=
aaaf94315952:~$ mkdir -p ~/gqlgen-todos
aaaf94315952:~$ cd gqlgen-todos/
aaaf94315952:~/gqlgen-todos$ go mod init github.com/yourname/gqlgen-todos
go: creating new go.mod: module github.com/yourname/gqlgen-todos
aaaf94315952:~/gqlgen-todos$ mkdir scripts
aaaf94315952:~/gqlgen-todos$ cat > scripts/gqlgen.go << EOF
// +build ignore

package main

import "github.com/99designs/gqlgen/cmd"

func main() {
  cmd.Execute()
}
EOF
aaaf94315952:~/gqlgen-todos$ cat > schema.graphql << EOF
type Todo {
  id: ID!
  text: String!
  done: Boolean!
  user: User!
}

type User {
  id: ID!
  name: String!
}

type Query {
  todos: [Todo!]!
}

input NewTodo {
  text: String!
  userId: String!
}

type Mutation {
  createTodo(input: NewTodo!): Todo!
}
EOF
aaaf94315952:~/gqlgen-todos$ go run scripts/gqlgen.go init
go: finding github.com/99designs/gqlgen/cmd latest
go: finding github.com/vektah/gqlparser/ast latest
go: finding github.com/vektah/gqlparser/gqlerror latest
go: finding github.com/vektah/gqlparser/validator latest
go: finding github.com/vektah/gqlparser/parser latest
go: finding golang.org/x/tools/go/loader latest
go: finding golang.org/x/tools/go/ast/astutil latest
go: finding golang.org/x/tools/imports latest
go: finding golang.org/x/tools/go/ast latest
go: finding golang.org/x/tools/go latest
go: finding golang.org/x/tools latest
NAME:
   gqlgen - generate a graphql server based on schema

USAGE:
   gqlgen [global options] command [command options] [arguments...]

DESCRIPTION:
   This is a library for quickly creating strictly typed graphql servers in golang. See https://gqlgen.com/ for a getting started guide.

COMMANDS:
     generate  generate a graphql server based on schema
     init      create a new gqlgen project
     version   print the version string
     help, h   Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --verbose, -v             show logs
   --config value, -c value  the config filename
   --help, -h                show help
gqlgen must be run from inside your $GOPATH
exit status 1

Pull Request Coming

I am working on a pull request that fixes this issue

[vektah]

dupe of #226