255 lines
7.0 KiB
Go
255 lines
7.0 KiB
Go
package jsonplan
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import (
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"encoding/json"
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"fmt"
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"sort"
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"github.com/zclconf/go-cty/cty"
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ctyjson "github.com/zclconf/go-cty/cty/json"
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"github.com/hashicorp/terraform/addrs"
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"github.com/hashicorp/terraform/configs/configschema"
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"github.com/hashicorp/terraform/plans"
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"github.com/hashicorp/terraform/terraform"
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)
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// stateValues is the common representation of resolved values for both the
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// prior state (which is always complete) and the planned new state.
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type stateValues struct {
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Outputs map[string]output `json:"outputs,omitempty"`
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RootModule module `json:"root_module,omitempty"`
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}
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// attributeValues is the JSON representation of the attribute values of the
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// resource, whose structure depends on the resource type schema.
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type attributeValues map[string]interface{}
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func marshalAttributeValues(value cty.Value, schema *configschema.Block) attributeValues {
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if value == cty.NilVal || value.IsNull() {
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return nil
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}
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ret := make(attributeValues)
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it := value.ElementIterator()
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for it.Next() {
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k, v := it.Element()
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vJSON, _ := ctyjson.Marshal(v, v.Type())
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ret[k.AsString()] = json.RawMessage(vJSON)
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}
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return ret
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}
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// marshalPlannedOutputs takes a list of changes and returns a map of output
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// values
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func marshalPlannedOutputs(changes *plans.Changes) (map[string]output, error) {
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if changes.Outputs == nil {
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// No changes - we're done here!
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return nil, nil
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}
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ret := make(map[string]output)
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for _, oc := range changes.Outputs {
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if oc.ChangeSrc.Action == plans.Delete {
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continue
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}
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var after []byte
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changeV, err := oc.Decode()
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if err != nil {
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return ret, err
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}
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if changeV.After != cty.NilVal {
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if changeV.After.IsWhollyKnown() {
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after, err = ctyjson.Marshal(changeV.After, changeV.After.Type())
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if err != nil {
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return ret, err
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}
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}
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}
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ret[oc.Addr.OutputValue.Name] = output{
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Value: json.RawMessage(after),
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Sensitive: oc.Sensitive,
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}
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}
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return ret, nil
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}
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func marshalPlannedValues(changes *plans.Changes, schemas *terraform.Schemas) (module, error) {
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var ret module
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// build two maps:
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// module name -> [resource addresses]
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// module -> [children modules]
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moduleResourceMap := make(map[string][]addrs.AbsResourceInstance)
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moduleMap := make(map[string][]addrs.ModuleInstance)
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seenModules := make(map[string]bool)
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for _, resource := range changes.Resources {
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// if the resource is being deleted, skip over it.
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if resource.Action != plans.Delete {
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containingModule := resource.Addr.Module.String()
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moduleResourceMap[containingModule] = append(moduleResourceMap[containingModule], resource.Addr)
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// the root module has no parents
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if !resource.Addr.Module.IsRoot() {
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parent := resource.Addr.Module.Parent().String()
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// we expect to see multiple resources in one module, so we
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// only need to report the "parent" module for each child module
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// once.
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if !seenModules[containingModule] {
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moduleMap[parent] = append(moduleMap[parent], resource.Addr.Module)
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seenModules[containingModule] = true
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}
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// If any given parent module has no resources, it needs to be
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// added to the moduleMap. This walks through the current
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// resources' modules' ancestors, taking advantage of the fact
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// that Ancestors() returns an ordered slice, and verifies that
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// each one is in the map.
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ancestors := resource.Addr.Module.Ancestors()
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for i, ancestor := range ancestors[:len(ancestors)-1] {
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aStr := ancestor.String()
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// childStr here is the immediate child of the current step
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childStr := ancestors[i+1].String()
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// we likely will see multiple resources in one module, so we
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// only need to report the "parent" module for each child module
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// once.
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if !seenModules[childStr] {
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moduleMap[aStr] = append(moduleMap[aStr], ancestors[i+1])
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seenModules[childStr] = true
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}
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}
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}
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}
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}
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// start with the root module
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resources, err := marshalPlanResources(changes, moduleResourceMap[""], schemas)
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if err != nil {
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return ret, err
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}
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ret.Resources = resources
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childModules, err := marshalPlanModules(changes, schemas, moduleMap[""], moduleMap, moduleResourceMap)
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if err != nil {
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return ret, err
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}
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sort.Slice(childModules, func(i, j int) bool {
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return childModules[i].Address < childModules[j].Address
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})
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ret.ChildModules = childModules
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return ret, nil
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}
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// marshalPlanResources
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func marshalPlanResources(changes *plans.Changes, ris []addrs.AbsResourceInstance, schemas *terraform.Schemas) ([]resource, error) {
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var ret []resource
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for _, ri := range ris {
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r := changes.ResourceInstance(ri)
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if r.Action == plans.Delete {
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continue
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}
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resource := resource{
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Address: r.Addr.String(),
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Type: r.Addr.Resource.Resource.Type,
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Name: r.Addr.Resource.Resource.Name,
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ProviderName: r.ProviderAddr.ProviderConfig.StringCompact(),
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Index: r.Addr.Resource.Key,
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}
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switch r.Addr.Resource.Resource.Mode {
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case addrs.ManagedResourceMode:
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resource.Mode = "managed"
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case addrs.DataResourceMode:
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resource.Mode = "data"
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default:
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return nil, fmt.Errorf("resource %s has an unsupported mode %s",
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r.Addr.String(),
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r.Addr.Resource.Resource.Mode.String(),
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)
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}
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schema, schemaVer := schemas.ResourceTypeConfig(
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r.ProviderAddr.ProviderConfig.LocalName,
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r.Addr.Resource.Resource.Mode,
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resource.Type,
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)
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if schema == nil {
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return nil, fmt.Errorf("no schema found for %s", r.Addr.String())
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}
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resource.SchemaVersion = schemaVer
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changeV, err := r.Decode(schema.ImpliedType())
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if err != nil {
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return nil, err
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}
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if changeV.After != cty.NilVal {
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if changeV.After.IsWhollyKnown() {
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resource.AttributeValues = marshalAttributeValues(changeV.After, schema)
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} else {
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knowns := omitUnknowns(changeV.After)
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resource.AttributeValues = marshalAttributeValues(knowns, schema)
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}
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}
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ret = append(ret, resource)
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}
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sort.Slice(ret, func(i, j int) bool {
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return ret[i].Address < ret[j].Address
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})
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return ret, nil
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}
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// marshalPlanModules iterates over a list of modules to recursively describe
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// the full module tree.
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func marshalPlanModules(
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changes *plans.Changes,
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schemas *terraform.Schemas,
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childModules []addrs.ModuleInstance,
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moduleMap map[string][]addrs.ModuleInstance,
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moduleResourceMap map[string][]addrs.AbsResourceInstance,
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) ([]module, error) {
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var ret []module
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for _, child := range childModules {
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moduleResources := moduleResourceMap[child.String()]
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// cm for child module, naming things is hard.
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var cm module
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// don't populate the address for the root module
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if child.String() != "" {
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cm.Address = child.String()
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}
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rs, err := marshalPlanResources(changes, moduleResources, schemas)
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if err != nil {
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return nil, err
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}
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cm.Resources = rs
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if len(moduleMap[child.String()]) > 0 {
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moreChildModules, err := marshalPlanModules(changes, schemas, moduleMap[child.String()], moduleMap, moduleResourceMap)
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if err != nil {
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return nil, err
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}
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cm.ChildModules = moreChildModules
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}
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ret = append(ret, cm)
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}
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return ret, nil
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}
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