141 lines
3.0 KiB
Go
141 lines
3.0 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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mux *MuxConn
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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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mux *MuxConn
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}
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type BuildPrepareResponse struct {
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Warnings []string
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Error *BasicError
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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() ([]string, error) {
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var resp BuildPrepareResponse
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if cerr := b.client.Call("Build.Prepare", new(interface{}), &resp); cerr != nil {
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return nil, cerr
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}
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var err error = nil
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if resp.Error != nil {
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err = resp.Error
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}
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return resp.Warnings, err
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}
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func (b *build) Run(ui packer.Ui, cache packer.Cache) ([]packer.Artifact, error) {
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nextId := b.mux.NextId()
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server := newServerWithMux(b.mux, nextId)
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server.RegisterCache(cache)
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server.RegisterUi(ui)
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go server.Serve()
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var result []uint32
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if err := b.client.Call("Build.Run", nextId, &result); err != nil {
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return nil, err
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}
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artifacts := make([]packer.Artifact, len(result))
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for i, streamId := range result {
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client, err := newClientWithMux(b.mux, streamId)
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if err != nil {
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return nil, err
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}
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artifacts[i] = client.Artifact()
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}
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return artifacts, nil
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}
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func (b *build) SetDebug(val bool) {
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if err := b.client.Call("Build.SetDebug", val, new(interface{})); err != nil {
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panic(err)
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}
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}
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func (b *build) SetForce(val bool) {
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if err := b.client.Call("Build.SetForce", val, new(interface{})); err != nil {
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panic(err)
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}
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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 *interface{}, resp *BuildPrepareResponse) error {
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warnings, err := b.build.Prepare()
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*resp = BuildPrepareResponse{
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Warnings: warnings,
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Error: NewBasicError(err),
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}
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return nil
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}
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func (b *BuildServer) Run(streamId uint32, reply *[]uint32) error {
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client, err := newClientWithMux(b.mux, streamId)
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if err != nil {
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return NewBasicError(err)
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}
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defer client.Close()
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artifacts, err := b.build.Run(client.Ui(), client.Cache())
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if err != nil {
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return NewBasicError(err)
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}
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*reply = make([]uint32, len(artifacts))
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for i, artifact := range artifacts {
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streamId := b.mux.NextId()
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server := newServerWithMux(b.mux, streamId)
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server.RegisterArtifact(artifact)
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go server.Serve()
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(*reply)[i] = streamId
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}
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return nil
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}
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func (b *BuildServer) SetDebug(val *bool, reply *interface{}) error {
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b.build.SetDebug(*val)
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return nil
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}
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func (b *BuildServer) SetForce(val *bool, reply *interface{}) error {
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b.build.SetForce(*val)
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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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