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package plugin
import (
"log"
"github.com/hashicorp/terraform/helper/schema"
proto "github.com/hashicorp/terraform/internal/tfplugin5"
"github.com/hashicorp/terraform/plugin/convert"
"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,
},
Meta: make(map[string]interface{}),
}
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
}
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