From 84cc10595ce8e4735c5943e2fe54aac41a911962 Mon Sep 17 00:00:00 2001
From: Jack Christensen <jack@jackchristensen.com>
Date: Tue, 22 Apr 2014 21:00:13 -0500
Subject: [PATCH] Connect as OS user if no user specified

---
 connection.go | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/connection.go b/connection.go
index c0faa067..36699844 100644
--- a/connection.go
+++ b/connection.go
@@ -14,6 +14,7 @@ import (
 	"fmt"
 	"io"
 	"net"
+	"os/user"
 	"time"
 )
 
@@ -23,7 +24,7 @@ type ConnectionParameters struct {
 	Host       string // url (e.g. localhost)
 	Port       uint16 // default: 5432
 	Database   string
-	User       string
+	User       string // default: OS user name
 	Password   string
 	MsgBufSize int         // Size of work buffer used for transcoding messages. For optimal performance, it should be large enough to store a single row from any result set. Default: 1024
 	TLSConfig  *tls.Config // config for TLS connection -- nil disables TLS
@@ -90,8 +91,8 @@ func (e ProtocolError) Error() string {
 }
 
 // Connect establishes a connection with a PostgreSQL server using parameters. One
-// of parameters.Socket or parameters.Host must be specified. parameters.User must
-// also the included. Other parameters fields are optional.
+// of parameters.Socket or parameters.Host must be specified. parameters.User
+// will default to the OS user name. Other parameters fields are optional.
 func Connect(parameters ConnectionParameters) (c *Connection, err error) {
 	c = new(Connection)
 
@@ -102,6 +103,15 @@ func Connect(parameters ConnectionParameters) (c *Connection, err error) {
 		c.logger = nullLogger("null")
 	}
 
+	if c.parameters.User == "" {
+		user, err := user.Current()
+		if err != nil {
+			return nil, err
+		}
+		c.logger.Debug("Using default User " + user.Username)
+		c.parameters.User = user.Username
+	}
+
 	if c.parameters.Port == 0 {
 		c.logger.Debug("Using default Port")
 		c.parameters.Port = 5432