[cmd][test] try to use sh -c but failed

- sh -c is not working properly, even for simple command
- $(glide novendor) does not even work when direct typed into gitbash,
  it seems the new line has stopped the command from executing

Issue #7

util/command.go

@@ -1,15 +1,21 @@
 package util
 
 import (
+	"fmt"
 	"os"
 	"os/exec"
 	"strings"
 )
 
 // Command return a Command struct from a full commad
 func Command(cmd string) *exec.Cmd {
-	segments := strings.Split(cmd, " ")
+	segments := strings.Fields(cmd)
 	name := segments[0]
+	if (name == "sh") && (segments[1] == "-c") {
+		// TODO: this does not support use like go test $(glide novendor)
+		fmt.Println(strings.Join(segments[2:], " "))
+		return exec.Command("sh", "-c", strings.Join(segments[2:], " "))
+	}
 	return exec.Command(name, segments[1:]...)
 }
 

util/command_test.go

@@ -10,6 +10,9 @@ func TestCommand(t *testing.T) {
 	assert := assert.New(t)
 	cmd := Command("ls")
 	assert.Equal(1, len(cmd.Args))
+	// FIXME: using $(glide novendor) will no work
+	// TODO: try sh -c "go test -v -cover $(glide novendor)"
 	cmd = Command("go test -v -cover $(glide novendor)")
 	assert.Equal("test", cmd.Args[1])
+	assert.Nil(RunCommand("sh -c \"echo Hi\""))
 }