package plugin import ( "log" "github.com/hashicorp/terraform/helper/schema" "github.com/hashicorp/terraform/plugin/convert" "github.com/hashicorp/terraform/plugin/proto" "github.com/hashicorp/terraform/terraform" "github.com/zclconf/go-cty/cty" ctyconvert "github.com/zclconf/go-cty/cty/convert" "github.com/zclconf/go-cty/cty/msgpack" context "golang.org/x/net/context" ) // NewGRPCProvisionerServerShim wraps a terraform.ResourceProvisioner in a // proto.ProvisionerServer implementation. If the provided provisioner is not a // *schema.Provisioner, this will return nil, func NewGRPCProvisionerServerShim(p terraform.ResourceProvisioner) *GRPCProvisionerServer { sp, ok := p.(*schema.Provisioner) if !ok { return nil } return &GRPCProvisionerServer{ provisioner: sp, } } type GRPCProvisionerServer struct { provisioner *schema.Provisioner } func (s *GRPCProvisionerServer) GetSchema(_ context.Context, req *proto.GetProvisionerSchema_Request) (*proto.GetProvisionerSchema_Response, error) { resp := &proto.GetProvisionerSchema_Response{} resp.Provisioner = &proto.Schema{ Block: convert.ConfigSchemaToProto(schema.InternalMap(s.provisioner.Schema).CoreConfigSchema()), } return resp, nil } func (s *GRPCProvisionerServer) ValidateProvisionerConfig(_ context.Context, req *proto.ValidateProvisionerConfig_Request) (*proto.ValidateProvisionerConfig_Response, error) { resp := &proto.ValidateProvisionerConfig_Response{} cfgSchema := schema.InternalMap(s.provisioner.Schema).CoreConfigSchema() configVal, err := msgpack.Unmarshal(req.Config.Msgpack, cfgSchema.ImpliedType()) if err != nil { resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err) return resp, nil } config := terraform.NewResourceConfigShimmed(configVal, cfgSchema) warns, errs := s.provisioner.Validate(config) resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, convert.WarnsAndErrsToProto(warns, errs)) return resp, nil } // stringMapFromValue converts a cty.Value to a map[stirng]string. // This will panic if the val is not a cty.Map(cty.String). func stringMapFromValue(val cty.Value) map[string]string { m := map[string]string{} if val.IsNull() || !val.IsKnown() { return m } for it := val.ElementIterator(); it.Next(); { ak, av := it.Element() name := ak.AsString() if !av.IsKnown() || av.IsNull() { continue } av, _ = ctyconvert.Convert(av, cty.String) m[name] = av.AsString() } return m } // uiOutput implements the terraform.UIOutput interface to adapt the grpc // stream to the legacy Provisioner.Apply method. type uiOutput struct { srv proto.Provisioner_ProvisionResourceServer } func (o uiOutput) Output(s string) { err := o.srv.Send(&proto.ProvisionResource_Response{ Output: s, }) if err != nil { log.Printf("[ERROR] %s", err) } } func (s *GRPCProvisionerServer) ProvisionResource(req *proto.ProvisionResource_Request, srv proto.Provisioner_ProvisionResourceServer) error { // We send back a diagnostics over the stream if there was a // provisioner-side problem. srvResp := &proto.ProvisionResource_Response{} cfgSchema := schema.InternalMap(s.provisioner.Schema).CoreConfigSchema() cfgVal, err := msgpack.Unmarshal(req.Config.Msgpack, cfgSchema.ImpliedType()) if err != nil { srvResp.Diagnostics = convert.AppendProtoDiag(srvResp.Diagnostics, err) srv.Send(srvResp) return nil } resourceConfig := terraform.NewResourceConfigShimmed(cfgVal, cfgSchema) connVal, err := msgpack.Unmarshal(req.Connection.Msgpack, cty.Map(cty.String)) if err != nil { srvResp.Diagnostics = convert.AppendProtoDiag(srvResp.Diagnostics, err) srv.Send(srvResp) return nil } conn := stringMapFromValue(connVal) instanceState := &terraform.InstanceState{ Ephemeral: terraform.EphemeralState{ ConnInfo: conn, }, } err = s.provisioner.Apply(uiOutput{srv}, instanceState, resourceConfig) if err != nil { srvResp.Diagnostics = convert.AppendProtoDiag(srvResp.Diagnostics, err) srv.Send(srvResp) } return nil } func (s *GRPCProvisionerServer) Stop(_ context.Context, req *proto.Stop_Request) (*proto.Stop_Response, error) { resp := &proto.Stop_Response{} err := s.provisioner.Stop() if err != nil { resp.Error = err.Error() } return resp, nil }