terraform/helper/plugin/grpc_provider.go

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package plugin
import (
"encoding/json"
"errors"
"regexp"
"sort"
"strconv"
"strings"
"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"
"github.com/hashicorp/terraform/config/hcl2shim"
"github.com/hashicorp/terraform/configs/configschema"
"github.com/hashicorp/terraform/helper/schema"
proto "github.com/hashicorp/terraform/internal/tfplugin5"
"github.com/hashicorp/terraform/plugin/convert"
"github.com/hashicorp/terraform/terraform"
)
// NewGRPCProviderServerShim wraps a terraform.ResourceProvider in a
// proto.ProviderServer implementation. If the provided provider is not a
// *schema.Provider, this will return nil,
func NewGRPCProviderServerShim(p terraform.ResourceProvider) *GRPCProviderServer {
sp, ok := p.(*schema.Provider)
if !ok {
return nil
}
return &GRPCProviderServer{
provider: sp,
}
}
// GRPCProviderServer handles the server, or plugin side of the rpc connection.
type GRPCProviderServer struct {
provider *schema.Provider
}
func (s *GRPCProviderServer) GetSchema(_ context.Context, req *proto.GetProviderSchema_Request) (*proto.GetProviderSchema_Response, error) {
resp := &proto.GetProviderSchema_Response{
ResourceSchemas: make(map[string]*proto.Schema),
DataSourceSchemas: make(map[string]*proto.Schema),
}
resp.Provider = &proto.Schema{
Block: convert.ConfigSchemaToProto(s.getProviderSchemaBlock()),
}
for typ, res := range s.provider.ResourcesMap {
resp.ResourceSchemas[typ] = &proto.Schema{
Version: int64(res.SchemaVersion),
Block: convert.ConfigSchemaToProto(res.CoreConfigSchema()),
}
}
for typ, dat := range s.provider.DataSourcesMap {
resp.DataSourceSchemas[typ] = &proto.Schema{
Version: int64(dat.SchemaVersion),
Block: convert.ConfigSchemaToProto(dat.CoreConfigSchema()),
}
}
return resp, nil
}
func (s *GRPCProviderServer) getProviderSchemaBlock() *configschema.Block {
return schema.InternalMap(s.provider.Schema).CoreConfigSchema()
}
func (s *GRPCProviderServer) getResourceSchemaBlock(name string) *configschema.Block {
res := s.provider.ResourcesMap[name]
return res.CoreConfigSchema()
}
func (s *GRPCProviderServer) getDatasourceSchemaBlock(name string) *configschema.Block {
dat := s.provider.DataSourcesMap[name]
return dat.CoreConfigSchema()
}
func (s *GRPCProviderServer) PrepareProviderConfig(_ context.Context, req *proto.PrepareProviderConfig_Request) (*proto.PrepareProviderConfig_Response, error) {
resp := &proto.PrepareProviderConfig_Response{}
block := s.getProviderSchemaBlock()
configVal, err := msgpack.Unmarshal(req.Config.Msgpack, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
// lookup any required, top-level attributes that are Null, and see if we
// have a Default value available.
configVal, _ = cty.Transform(configVal, func(path cty.Path, val cty.Value) (cty.Value, error) {
// we're only looking for top-level attributes
if len(path) != 1 {
return val, nil
}
// nothing to do if we already have a value
if !val.IsNull() {
return val, nil
}
// get the Schema definition for this attribute
getAttr, ok := path[0].(cty.GetAttrStep)
// these should all exist, but just ignore anything strange
if !ok {
return val, nil
}
attrSchema := s.provider.Schema[getAttr.Name]
// continue to ignore anything that doesn't match
if attrSchema == nil {
return val, nil
}
// this is deprecated, so don't set it
if attrSchema.Deprecated != "" || attrSchema.Removed != "" {
return val, nil
}
// find a default value if it exists
def, err := attrSchema.DefaultValue()
if err != nil {
return val, err
}
// no default
if def == nil {
return val, err
}
// create a cty.Value and make sure it's the correct type
tmpVal := hcl2shim.HCL2ValueFromConfigValue(def)
val, err = ctyconvert.Convert(tmpVal, val.Type())
return val, err
})
configVal, err = block.CoerceValue(configVal)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
config := terraform.NewResourceConfigShimmed(configVal, block)
warns, errs := s.provider.Validate(config)
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, convert.WarnsAndErrsToProto(warns, errs))
preparedConfigMP, err := msgpack.Marshal(configVal, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
resp.PreparedConfig = &proto.DynamicValue{Msgpack: preparedConfigMP}
return resp, nil
}
func (s *GRPCProviderServer) ValidateResourceTypeConfig(_ context.Context, req *proto.ValidateResourceTypeConfig_Request) (*proto.ValidateResourceTypeConfig_Response, error) {
resp := &proto.ValidateResourceTypeConfig_Response{}
block := s.getResourceSchemaBlock(req.TypeName)
configVal, err := msgpack.Unmarshal(req.Config.Msgpack, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
config := terraform.NewResourceConfigShimmed(configVal, block)
warns, errs := s.provider.ValidateResource(req.TypeName, config)
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, convert.WarnsAndErrsToProto(warns, errs))
return resp, nil
}
func (s *GRPCProviderServer) ValidateDataSourceConfig(_ context.Context, req *proto.ValidateDataSourceConfig_Request) (*proto.ValidateDataSourceConfig_Response, error) {
resp := &proto.ValidateDataSourceConfig_Response{}
block := s.getDatasourceSchemaBlock(req.TypeName)
configVal, err := msgpack.Unmarshal(req.Config.Msgpack, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
config := terraform.NewResourceConfigShimmed(configVal, block)
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warns, errs := s.provider.ValidateDataSource(req.TypeName, config)
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, convert.WarnsAndErrsToProto(warns, errs))
return resp, nil
}
func (s *GRPCProviderServer) UpgradeResourceState(_ context.Context, req *proto.UpgradeResourceState_Request) (*proto.UpgradeResourceState_Response, error) {
resp := &proto.UpgradeResourceState_Response{}
res := s.provider.ResourcesMap[req.TypeName]
block := res.CoreConfigSchema()
version := int(req.Version)
var jsonMap map[string]interface{}
var err error
// if there's a JSON state, we need to decode it.
if len(req.RawState.Json) > 0 {
err = json.Unmarshal(req.RawState.Json, &jsonMap)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
}
// We first need to upgrade a flatmap state if it exists.
// There should never be both a JSON and Flatmap state in the request.
if req.RawState.Flatmap != nil {
jsonMap, version, err = s.upgradeFlatmapState(version, req.RawState.Flatmap, res)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
}
// complete the upgrade of the JSON states
jsonMap, err = s.upgradeJSONState(version, jsonMap, res)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
// now we need to turn the state into the default json representation, so
// that it can be re-decoded using the actual schema.
val, err := schema.JSONMapToStateValue(jsonMap, block)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
// encode the final state to the expected msgpack format
newStateMP, err := msgpack.Marshal(val, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
resp.UpgradedState = &proto.DynamicValue{Msgpack: newStateMP}
return resp, nil
}
// upgradeFlatmapState takes a legacy flatmap state, upgrades it using Migrate
// state if necessary, and converts it to the new JSON state format decoded as a
// map[string]interface{}.
// upgradeFlatmapState returns the json map along with the corresponding schema
// version.
func (s *GRPCProviderServer) upgradeFlatmapState(version int, m map[string]string, res *schema.Resource) (map[string]interface{}, int, error) {
// this will be the version we've upgraded so, defaulting to the given
// version in case no migration was called.
upgradedVersion := version
// first determine if we need to call the legacy MigrateState func
requiresMigrate := version < res.SchemaVersion
schemaType := res.CoreConfigSchema().ImpliedType()
// if there are any StateUpgraders, then we need to only compare
// against the first version there
if len(res.StateUpgraders) > 0 {
requiresMigrate = version < res.StateUpgraders[0].Version
}
if requiresMigrate {
if res.MigrateState == nil {
return nil, 0, errors.New("cannot upgrade state, missing MigrateState function")
}
is := &terraform.InstanceState{
ID: m["id"],
Attributes: m,
Meta: map[string]interface{}{
"schema_version": strconv.Itoa(version),
},
}
is, err := res.MigrateState(version, is, s.provider.Meta())
if err != nil {
return nil, 0, err
}
// re-assign the map in case there was a copy made, making sure to keep
// the ID
m := is.Attributes
m["id"] = is.ID
// if there are further upgraders, then we've only updated that far
if len(res.StateUpgraders) > 0 {
schemaType = res.StateUpgraders[0].Type
upgradedVersion = res.StateUpgraders[0].Version
}
} else {
// the schema version may be newer than the MigrateState functions
// handled and older than the current, but still stored in the flatmap
// form. If that's the case, we need to find the correct schema type to
// convert the state.
for _, upgrader := range res.StateUpgraders {
if upgrader.Version == version {
schemaType = upgrader.Type
break
}
}
}
// now we know the state is up to the latest version that handled the
// flatmap format state. Now we can upgrade the format and continue from
// there.
newConfigVal, err := hcl2shim.HCL2ValueFromFlatmap(m, schemaType)
if err != nil {
return nil, 0, err
}
jsonMap, err := schema.StateValueToJSONMap(newConfigVal, schemaType)
return jsonMap, upgradedVersion, err
}
func (s *GRPCProviderServer) upgradeJSONState(version int, m map[string]interface{}, res *schema.Resource) (map[string]interface{}, error) {
var err error
for _, upgrader := range res.StateUpgraders {
if version != upgrader.Version {
continue
}
m, err = upgrader.Upgrade(m, s.provider.Meta())
if err != nil {
return nil, err
}
version++
}
return m, nil
}
func (s *GRPCProviderServer) Stop(_ context.Context, _ *proto.Stop_Request) (*proto.Stop_Response, error) {
resp := &proto.Stop_Response{}
err := s.provider.Stop()
if err != nil {
resp.Error = err.Error()
}
return resp, nil
}
func (s *GRPCProviderServer) Configure(_ context.Context, req *proto.Configure_Request) (*proto.Configure_Response, error) {
resp := &proto.Configure_Response{}
block := s.getProviderSchemaBlock()
configVal, err := msgpack.Unmarshal(req.Config.Msgpack, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
config := terraform.NewResourceConfigShimmed(configVal, block)
err = s.provider.Configure(config)
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
func (s *GRPCProviderServer) ReadResource(_ context.Context, req *proto.ReadResource_Request) (*proto.ReadResource_Response, error) {
resp := &proto.ReadResource_Response{}
res := s.provider.ResourcesMap[req.TypeName]
block := res.CoreConfigSchema()
stateVal, err := msgpack.Unmarshal(req.CurrentState.Msgpack, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
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instanceState, err := res.ShimInstanceStateFromValue(stateVal)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
newInstanceState, err := res.RefreshWithoutUpgrade(instanceState, s.provider.Meta())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
if newInstanceState == nil || newInstanceState.ID == "" {
// The old provider API used an empty id to signal that the remote
// object appears to have been deleted, but our new protocol expects
// to see a null value (in the cty sense) in that case.
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newStateMP, err := msgpack.Marshal(cty.NullVal(block.ImpliedType()), block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
}
resp.NewState = &proto.DynamicValue{
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Msgpack: newStateMP,
}
return resp, nil
}
// helper/schema should always copy the ID over, but do it again just to be safe
newInstanceState.Attributes["id"] = newInstanceState.ID
newInstanceState.Attributes = normalizeFlatmapContainers(instanceState.Attributes, newInstanceState.Attributes)
newStateVal, err := hcl2shim.HCL2ValueFromFlatmap(newInstanceState.Attributes, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
newStateVal = copyTimeoutValues(newStateVal, stateVal)
newStateMP, err := msgpack.Marshal(newStateVal, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
resp.NewState = &proto.DynamicValue{
Msgpack: newStateMP,
}
return resp, nil
}
func (s *GRPCProviderServer) PlanResourceChange(_ context.Context, req *proto.PlanResourceChange_Request) (*proto.PlanResourceChange_Response, error) {
resp := &proto.PlanResourceChange_Response{}
res := s.provider.ResourcesMap[req.TypeName]
block := res.CoreConfigSchema()
priorStateVal, err := msgpack.Unmarshal(req.PriorState.Msgpack, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
proposedNewStateVal, err := msgpack.Unmarshal(req.ProposedNewState.Msgpack, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
info := &terraform.InstanceInfo{
Type: req.TypeName,
}
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priorState, err := res.ShimInstanceStateFromValue(priorStateVal)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
priorPrivate := make(map[string]interface{})
if len(req.PriorPrivate) > 0 {
if err := json.Unmarshal(req.PriorPrivate, &priorPrivate); err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
}
priorState.Meta = priorPrivate
// turn the proposed state into a legacy configuration
cfg := terraform.NewResourceConfigShimmed(proposedNewStateVal, block)
diff, err := s.provider.SimpleDiff(info, priorState, cfg)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
if diff == nil {
// schema.Provider.Diff returns nil if it ends up making a diff with no
// changes, but our new interface wants us to return an actual change
// description that _shows_ there are no changes. This is usually the
// PriorSate, however if there was no prior state and no diff, then we
// use the ProposedNewState.
if !priorStateVal.IsNull() {
resp.PlannedState = req.PriorState
} else {
resp.PlannedState = req.ProposedNewState
}
return resp, nil
}
// strip out non-diffs
for k, v := range diff.Attributes {
if v.New == v.Old && !v.NewComputed && !v.NewRemoved {
delete(diff.Attributes, k)
}
}
if priorState == nil {
priorState = &terraform.InstanceState{}
}
// now we need to apply the diff to the prior state, so get the planned state
plannedAttrs, err := diff.Apply(priorState.Attributes, block)
plannedAttrs = normalizeFlatmapContainers(priorState.Attributes, plannedAttrs)
plannedStateVal, err := hcl2shim.HCL2ValueFromFlatmap(plannedAttrs, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
plannedStateVal, err = block.CoerceValue(plannedStateVal)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
plannedStateVal = copyTimeoutValues(plannedStateVal, proposedNewStateVal)
plannedMP, err := msgpack.Marshal(plannedStateVal, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
resp.PlannedState = &proto.DynamicValue{
Msgpack: plannedMP,
}
// the Meta field gets encoded into PlannedPrivate
if diff.Meta != nil {
plannedPrivate, err := json.Marshal(diff.Meta)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
resp.PlannedPrivate = plannedPrivate
}
// collect the attributes that require instance replacement, and convert
// them to cty.Paths.
var requiresNew []string
for attr, d := range diff.Attributes {
if d.RequiresNew {
requiresNew = append(requiresNew, attr)
}
}
// If anything requires a new resource already, or the "id" field indicates
// that we will be creating a new resource, then we need to add that to
// RequiresReplace so that core can tell if the instance is being replaced
// even if changes are being suppressed via "ignore_changes".
id := plannedStateVal.GetAttr("id")
if len(requiresNew) > 0 || id.IsNull() || !id.IsKnown() {
requiresNew = append(requiresNew, "id")
}
requiresReplace, err := hcl2shim.RequiresReplace(requiresNew, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
// convert these to the protocol structures
for _, p := range requiresReplace {
resp.RequiresReplace = append(resp.RequiresReplace, pathToAttributePath(p))
}
return resp, nil
}
func (s *GRPCProviderServer) ApplyResourceChange(_ context.Context, req *proto.ApplyResourceChange_Request) (*proto.ApplyResourceChange_Response, error) {
resp := &proto.ApplyResourceChange_Response{}
res := s.provider.ResourcesMap[req.TypeName]
block := res.CoreConfigSchema()
priorStateVal, err := msgpack.Unmarshal(req.PriorState.Msgpack, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
plannedStateVal, err := msgpack.Unmarshal(req.PlannedState.Msgpack, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
info := &terraform.InstanceInfo{
Type: req.TypeName,
}
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priorState, err := res.ShimInstanceStateFromValue(priorStateVal)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
private := make(map[string]interface{})
if len(req.PlannedPrivate) > 0 {
if err := json.Unmarshal(req.PlannedPrivate, &private); err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
}
var diff *terraform.InstanceDiff
destroy := false
// a null state means we are destroying the instance
if plannedStateVal.IsNull() {
destroy = true
diff = &terraform.InstanceDiff{
Attributes: make(map[string]*terraform.ResourceAttrDiff),
Meta: make(map[string]interface{}),
Destroy: true,
}
} else {
diff, err = schema.DiffFromValues(priorStateVal, plannedStateVal, res)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
}
if diff == nil {
diff = &terraform.InstanceDiff{
Attributes: make(map[string]*terraform.ResourceAttrDiff),
Meta: make(map[string]interface{}),
}
}
// strip out non-diffs
for k, v := range diff.Attributes {
if v.New == v.Old && !v.NewComputed && !v.NewRemoved {
delete(diff.Attributes, k)
}
}
if private != nil {
diff.Meta = private
}
newInstanceState, err := s.provider.Apply(info, priorState, diff)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
// here we use the planned state to check for unknown/zero containers values
// when normalizing the flatmap.
plannedState := hcl2shim.FlatmapValueFromHCL2(plannedStateVal)
if newInstanceState != nil {
newInstanceState.Attributes = normalizeFlatmapContainers(plannedState, newInstanceState.Attributes)
}
newStateVal := cty.NullVal(block.ImpliedType())
// We keep the null val if we destroyed the resource, otherwise build the
// entire object, even if the new state was nil.
if !destroy {
newStateVal, err = schema.StateValueFromInstanceState(newInstanceState, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
}
newStateVal = copyTimeoutValues(newStateVal, plannedStateVal)
newStateMP, err := msgpack.Marshal(newStateVal, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
resp.NewState = &proto.DynamicValue{
Msgpack: newStateMP,
}
if newInstanceState != nil {
meta, err := json.Marshal(newInstanceState.Meta)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
resp.Private = meta
}
return resp, nil
}
func (s *GRPCProviderServer) ImportResourceState(_ context.Context, req *proto.ImportResourceState_Request) (*proto.ImportResourceState_Response, error) {
resp := &proto.ImportResourceState_Response{}
block := s.getResourceSchemaBlock(req.TypeName)
info := &terraform.InstanceInfo{
Type: req.TypeName,
}
newInstanceStates, err := s.provider.ImportState(info, req.Id)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
for _, is := range newInstanceStates {
// copy the ID again just to be sure it wasn't missed
is.Attributes["id"] = is.ID
newStateVal, err := hcl2shim.HCL2ValueFromFlatmap(is.Attributes, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
newStateMP, err := msgpack.Marshal(newStateVal, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
meta, err := json.Marshal(is.Meta)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
// the legacy implementation could only import one type at a time
importedResource := &proto.ImportResourceState_ImportedResource{
TypeName: req.TypeName,
State: &proto.DynamicValue{
Msgpack: newStateMP,
},
Private: meta,
}
resp.ImportedResources = append(resp.ImportedResources, importedResource)
}
return resp, nil
}
func (s *GRPCProviderServer) ReadDataSource(_ context.Context, req *proto.ReadDataSource_Request) (*proto.ReadDataSource_Response, error) {
resp := &proto.ReadDataSource_Response{}
res := s.provider.DataSourcesMap[req.TypeName]
block := res.CoreConfigSchema()
configVal, err := msgpack.Unmarshal(req.Config.Msgpack, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
info := &terraform.InstanceInfo{
Type: req.TypeName,
}
config := terraform.NewResourceConfigShimmed(configVal, block)
// we need to still build the diff separately with the Read method to match
// the old behavior
diff, err := s.provider.ReadDataDiff(info, config)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
// now we can get the new complete data source
newInstanceState, err := s.provider.ReadDataApply(info, diff)
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
newStateVal, err := schema.StateValueFromInstanceState(newInstanceState, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
newStateVal = copyTimeoutValues(newStateVal, configVal)
newStateMP, err := msgpack.Marshal(newStateVal, block.ImpliedType())
if err != nil {
resp.Diagnostics = convert.AppendProtoDiag(resp.Diagnostics, err)
return resp, nil
}
resp.State = &proto.DynamicValue{
Msgpack: newStateMP,
}
return resp, nil
}
func pathToAttributePath(path cty.Path) *proto.AttributePath {
var steps []*proto.AttributePath_Step
for _, step := range path {
switch s := step.(type) {
case cty.GetAttrStep:
steps = append(steps, &proto.AttributePath_Step{
Selector: &proto.AttributePath_Step_AttributeName{
AttributeName: s.Name,
},
})
case cty.IndexStep:
ty := s.Key.Type()
switch ty {
case cty.Number:
i, _ := s.Key.AsBigFloat().Int64()
steps = append(steps, &proto.AttributePath_Step{
Selector: &proto.AttributePath_Step_ElementKeyInt{
ElementKeyInt: i,
},
})
case cty.String:
steps = append(steps, &proto.AttributePath_Step{
Selector: &proto.AttributePath_Step_ElementKeyString{
ElementKeyString: s.Key.AsString(),
},
})
}
}
}
return &proto.AttributePath{Steps: steps}
}
// normalizeFlatmapContainers removes empty containers, and fixes counts in a
// set of flatmapped attributes. The prior value is used to determine if there
// could be zero-length flatmap containers which we need to preserve. This
// allows a provider to set an empty computed container in the state without
// creating perpetual diff.
func normalizeFlatmapContainers(prior map[string]string, attrs map[string]string) map[string]string {
2018-11-16 21:12:16 +01:00
keyRx := regexp.MustCompile(`.\.[%#]$`)
// while we can't determine if the value was actually computed here, we will
// trust that our shims stored and retrieved a zero-value container
// correctly.
zeros := map[string]bool{}
for k, v := range prior {
if keyRx.MatchString(k) && (v == "0" || v == hcl2shim.UnknownVariableValue) {
zeros[k] = true
}
}
// find container keys
var keys []string
for k, v := range attrs {
if !keyRx.MatchString(k) {
continue
}
if v == hcl2shim.UnknownVariableValue {
// if the index value indicates the container is unknown, skip
// updating the counts.
continue
}
keys = append(keys, k)
}
// sort the keys in reverse, so that we check the longest subkeys first
sort.Slice(keys, func(i, j int) bool {
a, b := keys[i], keys[j]
if strings.HasPrefix(a, b) {
return true
}
if strings.HasPrefix(b, a) {
return false
}
return a > b
})
for _, k := range keys {
prefix := k[:len(k)-1]
indexes := map[string]int{}
for cand := range attrs {
if cand == k {
continue
}
if strings.HasPrefix(cand, prefix) {
idx := cand[len(prefix):]
dot := strings.Index(idx, ".")
if dot > 0 {
idx = idx[:dot]
}
indexes[idx]++
}
}
switch {
case len(indexes) == 0 && zeros[k]:
// if there were no keys, but the value was known to be zero, the provider
// must have set the computed value to an empty container, and we
// need to leave it in the flatmap.
attrs[k] = "0"
case len(indexes) > 0:
attrs[k] = strconv.Itoa(len(indexes))
default:
delete(attrs, k)
}
}
return attrs
}
// helper/schema throws away timeout values from the config and stores them in
// the Private/Meta fields. we need to copy those values into the planned state
// so that core doesn't see a perpetual diff with the timeout block.
func copyTimeoutValues(to cty.Value, from cty.Value) cty.Value {
// if `from` is null, then there are no attributes, and if `to` is null we
// are planning to remove it altogether.
if from.IsNull() || to.IsNull() {
return to
}
fromAttrs := from.AsValueMap()
timeouts, ok := fromAttrs[schema.TimeoutsConfigKey]
// no timeouts to copy
// timeouts shouldn't be unknown, but don't copy possibly invalid values
if !ok || timeouts.IsNull() || !timeouts.IsWhollyKnown() {
return to
}
toAttrs := to.AsValueMap()
toAttrs[schema.TimeoutsConfigKey] = timeouts
return cty.ObjectVal(toAttrs)
}