packer-cn/packer/rpc/ui.go

146 lines
3.2 KiB
Go

package rpc
import (
"io"
"log"
"net/rpc"
"github.com/hashicorp/packer/packer"
)
// An implementation of packer.Ui where the Ui is actually executed
// over an RPC connection.
type Ui struct {
client *rpc.Client
endpoint string
}
var _ packer.Ui = new(Ui)
// UiServer wraps a packer.Ui implementation and makes it exportable
// as part of a Golang RPC server.
type UiServer struct {
ui packer.Ui
register func(name string, rcvr interface{}) error
}
// The arguments sent to Ui.Machine
type UiMachineArgs struct {
Category string
Args []string
}
func (u *Ui) Ask(query string) (result string, err error) {
err = u.client.Call("Ui.Ask", query, &result)
return
}
func (u *Ui) Error(message string) {
if err := u.client.Call("Ui.Error", message, new(interface{})); err != nil {
log.Printf("Error in Ui RPC call: %s", err)
}
}
func (u *Ui) Machine(t string, args ...string) {
rpcArgs := &UiMachineArgs{
Category: t,
Args: args,
}
if err := u.client.Call("Ui.Machine", rpcArgs, new(interface{})); err != nil {
log.Printf("Error in Ui RPC call: %s", err)
}
}
func (u *Ui) Message(message string) {
if err := u.client.Call("Ui.Message", message, new(interface{})); err != nil {
log.Printf("Error in Ui RPC call: %s", err)
}
}
func (u *Ui) Say(message string) {
if err := u.client.Call("Ui.Say", message, new(interface{})); err != nil {
log.Printf("Error in Ui RPC call: %s", err)
}
}
func (u *Ui) ProgressBar() packer.ProgressBar {
if err := u.client.Call("Ui.ProgressBar", new(interface{}), new(interface{})); err != nil {
log.Printf("Error in Ui RPC call: %s", err)
}
return u // Ui is also a progress bar !!
}
var _ packer.ProgressBar = new(Ui)
func (pb *Ui) Start(total int64) {
pb.client.Call("Ui.Start", total, new(interface{}))
}
func (pb *Ui) Add(current int64) {
pb.client.Call("Ui.Add", current, new(interface{}))
}
func (pb *Ui) Finish() {
pb.client.Call("Ui.Finish", nil, new(interface{}))
}
func (pb *Ui) NewProxyReader(r io.Reader) io.Reader {
return &packer.ProxyReader{Reader: r, ProgressBar: pb}
}
func (u *UiServer) Ask(query string, reply *string) (err error) {
*reply, err = u.ui.Ask(query)
return
}
func (u *UiServer) Error(message *string, reply *interface{}) error {
u.ui.Error(*message)
*reply = nil
return nil
}
func (u *UiServer) Machine(args *UiMachineArgs, reply *interface{}) error {
u.ui.Machine(args.Category, args.Args...)
*reply = nil
return nil
}
func (u *UiServer) Message(message *string, reply *interface{}) error {
u.ui.Message(*message)
*reply = nil
return nil
}
func (u *UiServer) Say(message *string, reply *interface{}) error {
u.ui.Say(*message)
*reply = nil
return nil
}
func (u *UiServer) ProgressBar(_ *string, reply *interface{}) error {
// No-op for now, this function might be
// used in the future if we want to use
// different progress bars with identifiers.
u.ui.ProgressBar()
return nil
}
func (pb *UiServer) Finish(_ string, _ *interface{}) error {
pb.ui.ProgressBar().Finish()
return nil
}
func (pb *UiServer) Start(total int64, _ *interface{}) error {
pb.ui.ProgressBar().Start(total)
return nil
}
func (pb *UiServer) Add(current int64, _ *interface{}) error {
pb.ui.ProgressBar().Add(current)
return nil
}