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package rpc
import (
"io"
"log"
"net/rpc"
packersdk "github.com/hashicorp/packer/packer-plugin-sdk/packer"
"github.com/ugorji/go/codec"
)
// Client is the client end that communicates with a Packer RPC server.
// Establishing a connection is up to the user. The Client can communicate over
// any ReadWriteCloser. In Packer, each "plugin" (builder, provisioner,
// and post-processor) creates and launches a server. The the packer "core"
// creates and uses the client.
type Client struct {
mux *muxBroker
client *rpc.Client
closeMux bool
}
func NewClient(rwc io.ReadWriteCloser) (*Client, error) {
mux, err := newMuxBrokerClient(rwc)
if err != nil {
return nil, err
}
go mux.Run()
result, err := newClientWithMux(mux, 0)
if err != nil {
mux.Close()
return nil, err
}
result.closeMux = true
return result, err
}
func newClientWithMux(mux *muxBroker, streamId uint32) (*Client, error) {
clientConn, err := mux.Dial(streamId)
if err != nil {
return nil, err
}
h := &codec.MsgpackHandle{
WriteExt: true,
}
clientCodec := codec.GoRpc.ClientCodec(clientConn, h)
return &Client{
mux: mux,
client: rpc.NewClientWithCodec(clientCodec),
closeMux: false,
}, nil
}
func (c *Client) Close() error {
if err := c.client.Close(); err != nil {
return err
}
if c.closeMux {
log.Printf("[WARN] Client is closing mux")
return c.mux.Close()
}
return nil
}
func (c *Client) Artifact() packersdk.Artifact {
return &artifact{
commonClient: commonClient{
endpoint: DefaultArtifactEndpoint,
client: c.client,
},
}
}
func (c *Client) Build() packersdk.Build {
return &build{
commonClient: commonClient{
endpoint: DefaultBuildEndpoint,
client: c.client,
mux: c.mux,
},
}
}
func (c *Client) Builder() packersdk.Builder {
return &builder{
commonClient: commonClient{
endpoint: DefaultBuilderEndpoint,
client: c.client,
mux: c.mux,
},
}
}
func (c *Client) Communicator() packersdk.Communicator {
return &communicator{
commonClient: commonClient{
endpoint: DefaultCommunicatorEndpoint,
client: c.client,
mux: c.mux,
},
}
}
func (c *Client) Hook() packersdk.Hook {
return &hook{
commonClient: commonClient{
endpoint: DefaultHookEndpoint,
client: c.client,
mux: c.mux,
},
}
}
func (c *Client) PostProcessor() packersdk.PostProcessor {
return &postProcessor{
commonClient: commonClient{
endpoint: DefaultPostProcessorEndpoint,
client: c.client,
mux: c.mux,
},
}
}
func (c *Client) Provisioner() packersdk.Provisioner {
return &provisioner{
commonClient: commonClient{
endpoint: DefaultProvisionerEndpoint,
client: c.client,
mux: c.mux,
},
}
}
func (c *Client) Ui() packersdk.Ui {
return &Ui{
commonClient: commonClient{
endpoint: DefaultUiEndpoint,
client: c.client,
},
endpoint: DefaultUiEndpoint,
}
}
|
