108 lines
3.7 KiB
Go
108 lines
3.7 KiB
Go
package schema
|
|
|
|
import (
|
|
"encoding/json"
|
|
|
|
"github.com/hashicorp/terraform/config/hcl2shim"
|
|
"github.com/hashicorp/terraform/configs/configschema"
|
|
"github.com/hashicorp/terraform/terraform"
|
|
"github.com/zclconf/go-cty/cty"
|
|
|
|
ctyjson "github.com/zclconf/go-cty/cty/json"
|
|
)
|
|
|
|
// DiffFromValues takes the current state and desired state as cty.Values and
|
|
// derives a terraform.InstanceDiff to give to the legacy providers. This is
|
|
// used to take the states provided by the new ApplyResourceChange method and
|
|
// convert them to a state+diff required for the legacy Apply method.
|
|
func DiffFromValues(prior, planned cty.Value, res *Resource) (*terraform.InstanceDiff, error) {
|
|
return diffFromValues(prior, planned, res, nil)
|
|
}
|
|
|
|
// diffFromValues takes an additional CustomizeDiffFunc, so we can generate our
|
|
// test fixtures from the legacy tests. In the new provider protocol the diff
|
|
// only needs to be created for the apply operation, and any customizations
|
|
// have already been done.
|
|
func diffFromValues(prior, planned cty.Value, res *Resource, cust CustomizeDiffFunc) (*terraform.InstanceDiff, error) {
|
|
instanceState := InstanceStateFromStateValue(prior, res.SchemaVersion)
|
|
|
|
configSchema := res.CoreConfigSchema()
|
|
|
|
cfg := terraform.NewResourceConfigShimmed(planned, configSchema)
|
|
|
|
return schemaMap(res.Schema).Diff(instanceState, cfg, cust, nil)
|
|
}
|
|
|
|
// ApplyDiff takes a cty.Value state and applies a terraform.InstanceDiff to
|
|
// get a new cty.Value state. This is used to convert the diff returned from
|
|
// the legacy provider Diff method to the state required for the new
|
|
// PlanResourceChange method.
|
|
func ApplyDiff(state cty.Value, d *terraform.InstanceDiff, schemaBlock *configschema.Block) (cty.Value, error) {
|
|
return d.ApplyToValue(state, schemaBlock)
|
|
}
|
|
|
|
// StateValueToJSONMap converts a cty.Value to generic JSON map via the cty JSON
|
|
// encoding.
|
|
func StateValueToJSONMap(val cty.Value, ty cty.Type) (map[string]interface{}, error) {
|
|
js, err := ctyjson.Marshal(val, ty)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var m map[string]interface{}
|
|
if err := json.Unmarshal(js, &m); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return m, nil
|
|
}
|
|
|
|
// JSONMapToStateValue takes a generic json map[string]interface{} and converts it
|
|
// to the specific type, ensuring that the values conform to the schema.
|
|
func JSONMapToStateValue(m map[string]interface{}, block *configschema.Block) (cty.Value, error) {
|
|
var val cty.Value
|
|
|
|
js, err := json.Marshal(m)
|
|
if err != nil {
|
|
return val, err
|
|
}
|
|
|
|
val, err = ctyjson.Unmarshal(js, block.ImpliedType())
|
|
if err != nil {
|
|
return val, err
|
|
}
|
|
|
|
return block.CoerceValue(val)
|
|
}
|
|
|
|
// StateValueFromInstanceState converts a terraform.InstanceState to a
|
|
// cty.Value as described by the provided cty.Type, and maintains the resource
|
|
// ID as the "id" attribute.
|
|
func StateValueFromInstanceState(is *terraform.InstanceState, ty cty.Type) (cty.Value, error) {
|
|
if is == nil {
|
|
// if the state is nil, we need to construct a complete cty.Value with
|
|
// null attributes, rather than a single cty.NullVal(ty)
|
|
is = &terraform.InstanceState{}
|
|
}
|
|
|
|
// make sure ID is included in the attributes. The InstanceState.ID value
|
|
// takes precedent.
|
|
if is.Attributes == nil {
|
|
is.Attributes = map[string]string{}
|
|
}
|
|
|
|
if is.ID != "" {
|
|
is.Attributes["id"] = is.ID
|
|
}
|
|
|
|
return hcl2shim.HCL2ValueFromFlatmap(is.Attributes, ty)
|
|
}
|
|
|
|
// InstanceStateFromStateValue converts a cty.Value to a
|
|
// terraform.InstanceState. This function requires the schema version used by
|
|
// the provider, because the legacy providers used the private Meta data in the
|
|
// InstanceState to store the schema version.
|
|
func InstanceStateFromStateValue(state cty.Value, schemaVersion int) *terraform.InstanceState {
|
|
return terraform.NewInstanceStateShimmedFromValue(state, schemaVersion)
|
|
}
|