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schema.go
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schema.go
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package convert
import (
"encoding/json"
"reflect"
"sort"
"github.com/hashicorp/terraform/internal/configs/configschema"
"github.com/hashicorp/terraform/internal/providers"
proto "github.com/hashicorp/terraform/internal/tfplugin5"
)
// ConfigSchemaToProto takes a *configschema.Block and converts it to a
// proto.Schema_Block for a grpc response.
func ConfigSchemaToProto(b *configschema.Block) *proto.Schema_Block {
block := &proto.Schema_Block{
Description: b.Description,
DescriptionKind: protoStringKind(b.DescriptionKind),
Deprecated: b.Deprecated,
}
for _, name := range sortedKeys(b.Attributes) {
a := b.Attributes[name]
attr := &proto.Schema_Attribute{
Name: name,
Description: a.Description,
DescriptionKind: protoStringKind(a.DescriptionKind),
Optional: a.Optional,
Computed: a.Computed,
Required: a.Required,
Sensitive: a.Sensitive,
Deprecated: a.Deprecated,
}
ty, err := json.Marshal(a.Type)
if err != nil {
panic(err)
}
attr.Type = ty
block.Attributes = append(block.Attributes, attr)
}
for _, name := range sortedKeys(b.BlockTypes) {
b := b.BlockTypes[name]
block.BlockTypes = append(block.BlockTypes, protoSchemaNestedBlock(name, b))
}
return block
}
func protoStringKind(k configschema.StringKind) proto.StringKind {
switch k {
default:
return proto.StringKind_PLAIN
case configschema.StringMarkdown:
return proto.StringKind_MARKDOWN
}
}
func protoSchemaNestedBlock(name string, b *configschema.NestedBlock) *proto.Schema_NestedBlock {
var nesting proto.Schema_NestedBlock_NestingMode
switch b.Nesting {
case configschema.NestingSingle:
nesting = proto.Schema_NestedBlock_SINGLE
case configschema.NestingGroup:
nesting = proto.Schema_NestedBlock_GROUP
case configschema.NestingList:
nesting = proto.Schema_NestedBlock_LIST
case configschema.NestingSet:
nesting = proto.Schema_NestedBlock_SET
case configschema.NestingMap:
nesting = proto.Schema_NestedBlock_MAP
default:
nesting = proto.Schema_NestedBlock_INVALID
}
return &proto.Schema_NestedBlock{
TypeName: name,
Block: ConfigSchemaToProto(&b.Block),
Nesting: nesting,
MinItems: int64(b.MinItems),
MaxItems: int64(b.MaxItems),
}
}
// ProtoToProviderSchema takes a proto.Schema and converts it to a providers.Schema.
func ProtoToProviderSchema(s *proto.Schema) providers.Schema {
return providers.Schema{
Version: s.Version,
Block: ProtoToConfigSchema(s.Block),
}
}
// ProtoToConfigSchema takes the GetSchcema_Block from a grpc response and converts it
// to a terraform *configschema.Block.
func ProtoToConfigSchema(b *proto.Schema_Block) *configschema.Block {
block := &configschema.Block{
Attributes: make(map[string]*configschema.Attribute),
BlockTypes: make(map[string]*configschema.NestedBlock),
Description: b.Description,
DescriptionKind: schemaStringKind(b.DescriptionKind),
Deprecated: b.Deprecated,
}
for _, a := range b.Attributes {
attr := &configschema.Attribute{
Description: a.Description,
DescriptionKind: schemaStringKind(a.DescriptionKind),
Required: a.Required,
Optional: a.Optional,
Computed: a.Computed,
Sensitive: a.Sensitive,
Deprecated: a.Deprecated,
}
if err := json.Unmarshal(a.Type, &attr.Type); err != nil {
panic(err)
}
block.Attributes[a.Name] = attr
}
for _, b := range b.BlockTypes {
block.BlockTypes[b.TypeName] = schemaNestedBlock(b)
}
return block
}
func schemaStringKind(k proto.StringKind) configschema.StringKind {
switch k {
default:
return configschema.StringPlain
case proto.StringKind_MARKDOWN:
return configschema.StringMarkdown
}
}
func schemaNestedBlock(b *proto.Schema_NestedBlock) *configschema.NestedBlock {
var nesting configschema.NestingMode
switch b.Nesting {
case proto.Schema_NestedBlock_SINGLE:
nesting = configschema.NestingSingle
case proto.Schema_NestedBlock_GROUP:
nesting = configschema.NestingGroup
case proto.Schema_NestedBlock_LIST:
nesting = configschema.NestingList
case proto.Schema_NestedBlock_MAP:
nesting = configschema.NestingMap
case proto.Schema_NestedBlock_SET:
nesting = configschema.NestingSet
default:
// In all other cases we'll leave it as the zero value (invalid) and
// let the caller validate it and deal with this.
}
nb := &configschema.NestedBlock{
Nesting: nesting,
MinItems: int(b.MinItems),
MaxItems: int(b.MaxItems),
}
nested := ProtoToConfigSchema(b.Block)
nb.Block = *nested
return nb
}
// sortedKeys returns the lexically sorted keys from the given map. This is
// used to make schema conversions are deterministic. This panics if map keys
// are not a string.
func sortedKeys(m interface{}) []string {
v := reflect.ValueOf(m)
keys := make([]string, v.Len())
mapKeys := v.MapKeys()
for i, k := range mapKeys {
keys[i] = k.Interface().(string)
}
sort.Strings(keys)
return keys
}