terraform/command/jsonplan/values.go

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package jsonplan
import (
"encoding/json"
"fmt"
"sort"
"github.com/zclconf/go-cty/cty"
ctyjson "github.com/zclconf/go-cty/cty/json"
"github.com/hashicorp/terraform/addrs"
"github.com/hashicorp/terraform/configs/configschema"
"github.com/hashicorp/terraform/plans"
"github.com/hashicorp/terraform/terraform"
)
// stateValues is the common representation of resolved values for both the
// prior state (which is always complete) and the planned new state.
type stateValues struct {
Outputs map[string]output `json:"outputs,omitempty"`
RootModule module `json:"root_module,omitempty"`
}
// attributeValues is the JSON representation of the attribute values of the
// resource, whose structure depends on the resource type schema.
type attributeValues map[string]interface{}
func marshalAttributeValues(value cty.Value, schema *configschema.Block) attributeValues {
if value == cty.NilVal || value.IsNull() {
return nil
}
ret := make(attributeValues)
it := value.ElementIterator()
for it.Next() {
k, v := it.Element()
mildwonkey/b-show-state (#20032) * command/show: properly marshal attribute values to json marshalAttributeValues in jsonstate and jsonplan packages was returning a cty.Value, which json/encoding could not marshal. These functions now convert those cty.Values into json.RawMessages. * command/jsonplan: planned values should include resources that are not changing * command/jsonplan: return a filtered list of proposed 'after' attributes Previously, proposed 'after' attributes were not being shown if the attributes were not WhollyKnown. jsonplan now iterates through all the `after` attributes, omitting those which are not wholly known. The same was roughly true for after_unknown, and that structure is now correctly populated. In the future we may choose to filter the after_unknown structure to _only_ display unknown attributes, instead of all attributes. * command/jsonconfig: use a unique key for providers so that aliased providers don't get munged together This now uses the same "provider" key from configs.Module, e.g. `providername.provideralias`. * command/jsonplan: unknownAsBool needs to iterate through objects that are not wholly known * command/jsonplan: properly display actions as strings according to the RFC, instead of a plans.Action string. For example: a plans.Action string DeleteThenCreate should be displayed as ["delete", "create"] Tests have been updated to reflect this. * command/jsonplan: return "null" for unknown list items. The length of a list could be meaningful on its own, so we will turn unknowns into "null". The same is less likely true for maps and objects, so we will continue to omit unknown values from those.
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vJSON, _ := ctyjson.Marshal(v, v.Type())
ret[k.AsString()] = json.RawMessage(vJSON)
}
return ret
}
// marshalPlannedOutputs takes a list of changes and returns a map of output
// values
func marshalPlannedOutputs(changes *plans.Changes) (map[string]output, error) {
if changes.Outputs == nil {
// No changes - we're done here!
return nil, nil
}
ret := make(map[string]output)
for _, oc := range changes.Outputs {
if oc.ChangeSrc.Action == plans.Delete {
continue
}
var after []byte
changeV, err := oc.Decode()
if err != nil {
return ret, err
}
if changeV.After != cty.NilVal {
if changeV.After.IsWhollyKnown() {
after, err = ctyjson.Marshal(changeV.After, changeV.After.Type())
if err != nil {
return ret, err
}
}
}
ret[oc.Addr.OutputValue.Name] = output{
Value: json.RawMessage(after),
Sensitive: oc.Sensitive,
}
}
return ret, nil
}
func marshalPlannedValues(changes *plans.Changes, schemas *terraform.Schemas) (module, error) {
var ret module
// build two maps:
// module name -> [resource addresses]
// module -> [children modules]
moduleResourceMap := make(map[string][]addrs.AbsResourceInstance)
moduleMap := make(map[string][]addrs.ModuleInstance)
seenModules := make(map[string]bool)
for _, resource := range changes.Resources {
// if the resource is being deleted, skip over it.
if resource.Action != plans.Delete {
containingModule := resource.Addr.Module.String()
moduleResourceMap[containingModule] = append(moduleResourceMap[containingModule], resource.Addr)
// the root module has no parents
if !resource.Addr.Module.IsRoot() {
parent := resource.Addr.Module.Parent().String()
// we expect to see multiple resources in one module, so we
// only need to report the "parent" module for each child module
// once.
if !seenModules[containingModule] {
moduleMap[parent] = append(moduleMap[parent], resource.Addr.Module)
seenModules[containingModule] = true
}
// If any given parent module has no resources, it needs to be
// added to the moduleMap. This walks through the current
// resources' modules' ancestors, taking advantage of the fact
// that Ancestors() returns an ordered slice, and verifies that
// each one is in the map.
ancestors := resource.Addr.Module.Ancestors()
for i, ancestor := range ancestors[:len(ancestors)-1] {
aStr := ancestor.String()
// childStr here is the immediate child of the current step
childStr := ancestors[i+1].String()
// we likely will see multiple resources in one module, so we
// only need to report the "parent" module for each child module
// once.
if !seenModules[childStr] {
moduleMap[aStr] = append(moduleMap[aStr], ancestors[i+1])
seenModules[childStr] = true
}
}
}
}
}
// start with the root module
resources, err := marshalPlanResources(changes, moduleResourceMap[""], schemas)
if err != nil {
return ret, err
}
ret.Resources = resources
childModules, err := marshalPlanModules(changes, schemas, moduleMap[""], moduleMap, moduleResourceMap)
if err != nil {
return ret, err
}
sort.Slice(childModules, func(i, j int) bool {
return childModules[i].Address < childModules[j].Address
})
ret.ChildModules = childModules
return ret, nil
}
// marshalPlanResources
func marshalPlanResources(changes *plans.Changes, ris []addrs.AbsResourceInstance, schemas *terraform.Schemas) ([]resource, error) {
var ret []resource
for _, ri := range ris {
r := changes.ResourceInstance(ri)
mildwonkey/b-show-state (#20032) * command/show: properly marshal attribute values to json marshalAttributeValues in jsonstate and jsonplan packages was returning a cty.Value, which json/encoding could not marshal. These functions now convert those cty.Values into json.RawMessages. * command/jsonplan: planned values should include resources that are not changing * command/jsonplan: return a filtered list of proposed 'after' attributes Previously, proposed 'after' attributes were not being shown if the attributes were not WhollyKnown. jsonplan now iterates through all the `after` attributes, omitting those which are not wholly known. The same was roughly true for after_unknown, and that structure is now correctly populated. In the future we may choose to filter the after_unknown structure to _only_ display unknown attributes, instead of all attributes. * command/jsonconfig: use a unique key for providers so that aliased providers don't get munged together This now uses the same "provider" key from configs.Module, e.g. `providername.provideralias`. * command/jsonplan: unknownAsBool needs to iterate through objects that are not wholly known * command/jsonplan: properly display actions as strings according to the RFC, instead of a plans.Action string. For example: a plans.Action string DeleteThenCreate should be displayed as ["delete", "create"] Tests have been updated to reflect this. * command/jsonplan: return "null" for unknown list items. The length of a list could be meaningful on its own, so we will turn unknowns into "null". The same is less likely true for maps and objects, so we will continue to omit unknown values from those.
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if r.Action == plans.Delete {
continue
}
resource := resource{
Address: r.Addr.String(),
Type: r.Addr.Resource.Resource.Type,
Name: r.Addr.Resource.Resource.Name,
ProviderName: r.ProviderAddr.Provider.String(),
Index: r.Addr.Resource.Key,
}
switch r.Addr.Resource.Resource.Mode {
case addrs.ManagedResourceMode:
resource.Mode = "managed"
case addrs.DataResourceMode:
resource.Mode = "data"
default:
return nil, fmt.Errorf("resource %s has an unsupported mode %s",
r.Addr.String(),
r.Addr.Resource.Resource.Mode.String(),
)
}
schema, schemaVer := schemas.ResourceTypeConfig(
r.ProviderAddr.Provider,
r.Addr.Resource.Resource.Mode,
resource.Type,
)
if schema == nil {
return nil, fmt.Errorf("no schema found for %s", r.Addr.String())
}
resource.SchemaVersion = schemaVer
changeV, err := r.Decode(schema.ImpliedType())
if err != nil {
return nil, err
}
if changeV.After != cty.NilVal {
if changeV.After.IsWhollyKnown() {
resource.AttributeValues = marshalAttributeValues(changeV.After, schema)
} else {
knowns := omitUnknowns(changeV.After)
resource.AttributeValues = marshalAttributeValues(knowns, schema)
}
}
ret = append(ret, resource)
}
sort.Slice(ret, func(i, j int) bool {
return ret[i].Address < ret[j].Address
})
return ret, nil
}
// marshalPlanModules iterates over a list of modules to recursively describe
// the full module tree.
func marshalPlanModules(
changes *plans.Changes,
schemas *terraform.Schemas,
childModules []addrs.ModuleInstance,
moduleMap map[string][]addrs.ModuleInstance,
moduleResourceMap map[string][]addrs.AbsResourceInstance,
) ([]module, error) {
var ret []module
for _, child := range childModules {
moduleResources := moduleResourceMap[child.String()]
// cm for child module, naming things is hard.
var cm module
// don't populate the address for the root module
if child.String() != "" {
cm.Address = child.String()
}
rs, err := marshalPlanResources(changes, moduleResources, schemas)
if err != nil {
return nil, err
}
cm.Resources = rs
if len(moduleMap[child.String()]) > 0 {
moreChildModules, err := marshalPlanModules(changes, schemas, moduleMap[child.String()], moduleMap, moduleResourceMap)
if err != nil {
return nil, err
}
cm.ChildModules = moreChildModules
}
ret = append(ret, cm)
}
return ret, nil
}