112 lines
2.2 KiB
Go
112 lines
2.2 KiB
Go
package rpc
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import (
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"github.com/mitchellh/packer/packer"
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"net/rpc"
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)
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// An implementation of packer.Build where the build is actually executed
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// over an RPC connection.
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type build struct {
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client *rpc.Client
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}
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// BuildServer wraps a packer.Build implementation and makes it exportable
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// as part of a Golang RPC server.
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type BuildServer struct {
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build packer.Build
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}
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type BuildPrepareArgs struct {
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RPCAddress string
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}
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type BuildRunArgs struct {
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UiRPCAddress string
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}
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func Build(client *rpc.Client) *build {
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return &build{client}
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}
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func (b *build) Name() (result string) {
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b.client.Call("Build.Name", new(interface{}), &result)
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return
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}
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func (b *build) Prepare(ui packer.Ui) (err error) {
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// Create and start the server for the UI
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// TODO: Error handling
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server := rpc.NewServer()
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RegisterUi(server, ui)
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args := &BuildPrepareArgs{serveSingleConn(server)}
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if err := b.client.Call("Build.Prepare", args, &err); err != nil {
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panic(err)
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}
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return
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}
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func (b *build) Run(ui packer.Ui) packer.Artifact {
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// Create and start the server for the UI
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// TODO: Error handling
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server := rpc.NewServer()
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RegisterUi(server, ui)
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args := &BuildRunArgs{serveSingleConn(server)}
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var reply string
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if err := b.client.Call("Build.Run", args, &reply); err != nil {
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panic(err)
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}
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client, err := rpc.Dial("tcp", reply)
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if err != nil {
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panic(err)
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}
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return Artifact(client)
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}
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func (b *build) Cancel() {
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if err := b.client.Call("Build.Cancel", new(interface{}), new(interface{})); err != nil {
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panic(err)
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}
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}
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func (b *BuildServer) Name(args *interface{}, reply *string) error {
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*reply = b.build.Name()
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return nil
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}
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func (b *BuildServer) Prepare(args *BuildPrepareArgs, reply *error) error {
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client, err := rpc.Dial("tcp", args.RPCAddress)
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if err != nil {
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return err
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}
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*reply = b.build.Prepare(&Ui{client})
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return nil
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}
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func (b *BuildServer) Run(args *BuildRunArgs, reply *string) error {
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client, err := rpc.Dial("tcp", args.UiRPCAddress)
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if err != nil {
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return err
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}
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artifact := b.build.Run(&Ui{client})
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// Wrap the artifact
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server := rpc.NewServer()
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RegisterArtifact(server, artifact)
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*reply = serveSingleConn(server)
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return nil
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}
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func (b *BuildServer) Cancel(args *interface{}, reply *interface{}) error {
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b.build.Cancel()
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return nil
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}
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