title: cannot import proto file
body: <p>I have spent hours trying to read blogs on how to use simple proto file in Golang. I generated the .pb.go files. All internet examples are littered with doing import from some random <code>"github...</code> urls for proto import. I am not able to find any example on how to import a simple proto file that exists in same dir as my .go file or diff directory. How do I use proto files from local file systems.</p>
  
  <pre><code>go build hello.go
  hello.go:5:2: cannot find package "customer" in any of:
      /usr/local/go/src/customer (from $GOROOT)
      /Users/myhomedir/go/src/customer (from $GOPATH)
  </code></pre>
  
  <p>Contentes of <code>hello.go</code>in $SOME_DIR/customer</p>
  
  <pre><code>package main
  
  import  (
      "fmt"
      pb "customer"
  )
  
  func main() {
      fmt.Println("hello test message\n")
  }
  </code></pre>
  
  <p>Contents of <code>customer.proto</code></p>
  
  <pre><code>syntax = "proto3";
  package customer;
  
  
  // The Customer service definition.
  service Customer {
    // Get all Customers with filter - A server-to-client streaming RPC.
    rpc GetCustomers(CustomerFilter) returns (stream CustomerRequest) {}
    // Create a new Customer - A simple RPC
    rpc CreateCustomer (CustomerRequest) returns (CustomerResponse) {}
  }
  
  // Request message for creating a new customer
  message CustomerRequest {
    int32 id = 1;  // Unique ID number for a Customer.
    string name = 2;
    string email = 3;
    string phone= 4;
  
    message Address {
      string street = 1;
      string city = 2;
      string state = 3;
      string zip = 4;
      bool isShippingAddress = 5;
    }
  
    repeated Address addresses = 5;
  }
  
  message CustomerResponse {
    int32 id = 1;
    bool success = 2;
  }
  message CustomerFilter {
    string keyword = 1;
  }
  </code></pre>