Adrien Delorme ed091163be
HCL2 Parse packer.required_plugins block + packer init (#10304)
This adds the new `required_plugins` block to be nested under the packer block.

Example:
```hcl
packer {
  required_plugins {
    aws = {
      version = ">= 2.7.0"
      source = "azr/aws"
    }
    azure = ">= 2.7.0"
  }
}
```

For example on darwin_amd64 Packer will install those under :
* "${PACKER_HOME_DIR}/plugin/github.com/azr/amazon/packer-plugin-amazon_2.7.0_x5.0_darwin_amd64"
* "${PACKER_HOME_DIR}/plugin/github.com/hashicorp/azure/packer-plugin-azure_2.7.0_x5.0_darwin_amd64_x5"

+ docs
+ tests
2021-02-02 18:05:04 +01:00

130 lines
3.3 KiB
Go

package jsoniter
import (
"github.com/modern-go/reflect2"
"unsafe"
)
func decoderOfOptional(ctx *ctx, typ reflect2.Type) ValDecoder {
ptrType := typ.(*reflect2.UnsafePtrType)
elemType := ptrType.Elem()
decoder := decoderOfType(ctx, elemType)
return &OptionalDecoder{elemType, decoder}
}
func encoderOfOptional(ctx *ctx, typ reflect2.Type) ValEncoder {
ptrType := typ.(*reflect2.UnsafePtrType)
elemType := ptrType.Elem()
elemEncoder := encoderOfType(ctx, elemType)
encoder := &OptionalEncoder{elemEncoder}
return encoder
}
type OptionalDecoder struct {
ValueType reflect2.Type
ValueDecoder ValDecoder
}
func (decoder *OptionalDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
if iter.ReadNil() {
*((*unsafe.Pointer)(ptr)) = nil
} else {
if *((*unsafe.Pointer)(ptr)) == nil {
//pointer to null, we have to allocate memory to hold the value
newPtr := decoder.ValueType.UnsafeNew()
decoder.ValueDecoder.Decode(newPtr, iter)
*((*unsafe.Pointer)(ptr)) = newPtr
} else {
//reuse existing instance
decoder.ValueDecoder.Decode(*((*unsafe.Pointer)(ptr)), iter)
}
}
}
type dereferenceDecoder struct {
// only to deference a pointer
valueType reflect2.Type
valueDecoder ValDecoder
}
func (decoder *dereferenceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
if *((*unsafe.Pointer)(ptr)) == nil {
//pointer to null, we have to allocate memory to hold the value
newPtr := decoder.valueType.UnsafeNew()
decoder.valueDecoder.Decode(newPtr, iter)
*((*unsafe.Pointer)(ptr)) = newPtr
} else {
//reuse existing instance
decoder.valueDecoder.Decode(*((*unsafe.Pointer)(ptr)), iter)
}
}
type OptionalEncoder struct {
ValueEncoder ValEncoder
}
func (encoder *OptionalEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
if *((*unsafe.Pointer)(ptr)) == nil {
stream.WriteNil()
} else {
encoder.ValueEncoder.Encode(*((*unsafe.Pointer)(ptr)), stream)
}
}
func (encoder *OptionalEncoder) IsEmpty(ptr unsafe.Pointer) bool {
return *((*unsafe.Pointer)(ptr)) == nil
}
type dereferenceEncoder struct {
ValueEncoder ValEncoder
}
func (encoder *dereferenceEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
if *((*unsafe.Pointer)(ptr)) == nil {
stream.WriteNil()
} else {
encoder.ValueEncoder.Encode(*((*unsafe.Pointer)(ptr)), stream)
}
}
func (encoder *dereferenceEncoder) IsEmpty(ptr unsafe.Pointer) bool {
dePtr := *((*unsafe.Pointer)(ptr))
if dePtr == nil {
return true
}
return encoder.ValueEncoder.IsEmpty(dePtr)
}
func (encoder *dereferenceEncoder) IsEmbeddedPtrNil(ptr unsafe.Pointer) bool {
deReferenced := *((*unsafe.Pointer)(ptr))
if deReferenced == nil {
return true
}
isEmbeddedPtrNil, converted := encoder.ValueEncoder.(IsEmbeddedPtrNil)
if !converted {
return false
}
fieldPtr := unsafe.Pointer(deReferenced)
return isEmbeddedPtrNil.IsEmbeddedPtrNil(fieldPtr)
}
type referenceEncoder struct {
encoder ValEncoder
}
func (encoder *referenceEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
encoder.encoder.Encode(unsafe.Pointer(&ptr), stream)
}
func (encoder *referenceEncoder) IsEmpty(ptr unsafe.Pointer) bool {
return encoder.encoder.IsEmpty(unsafe.Pointer(&ptr))
}
type referenceDecoder struct {
decoder ValDecoder
}
func (decoder *referenceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
decoder.decoder.Decode(unsafe.Pointer(&ptr), iter)
}