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() 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 } // The values may be marked, but we must rely on the Sensitive flag // as the decoded value is only an intermediate step in transcoding // this to a json format. changeV.After, _ = changeV.After.UnmarkDeep() if changeV.After != cty.NilVal && 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) 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 } // The values may be marked, but we must rely on the Sensitive flag // as the decoded value is only an intermediate step in transcoding // this to a json format. changeV.Before, _ = changeV.Before.UnmarkDeep() changeV.After, _ = changeV.After.UnmarkDeep() 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 }