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plans/planfile: Reading and writing the new plan format 

The new format is radically different in than the old in physical
structure, but still has the same logical parts: the plan itself, a
snapshot of the input configuration, and a snapshot of the state as it
existed when the plan was created.

Rather than creating plan-specific serializations of state and config, the
new format instead leans on the existing file formats implemented
elsewhere, wrapping the result up in a zip archive with some internal file
naming conventions.

The plan portion of the file is serialized with protobuf, consistent with
our general strategy of replacing all use of encoding/gob with protobuf
moving forward.
This commit is contained in:
Martin Atkins 2018-06-19 16:30:59 -07:00
parent 7357e7f734
commit a2eb462f5d
18 changed files with 2251 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
plans/internal/planproto/doc.go Normal file
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// Package planproto is home to the Go stubs generated from the tfplan protobuf
// schema.
//
// This is an internal package to be used only by Terraform's planfile package.
// From elsewhere in Terraform, use the API exported by the planfile package
// itself.
package planproto

3
plans/internal/planproto/generate.go Normal file
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package planproto
//go:generate protoc --go_out=paths=source_relative:. planfile.proto

868
plans/internal/planproto/planfile.pb.go Normal file
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// Code generated by protoc-gen-go. DO NOT EDIT.
// source: planfile.proto
package planproto // import "github.com/hashicorp/terraform/plans/internal/planproto"
import proto "github.com/golang/protobuf/proto"
import fmt "fmt"
import math "math"
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf
// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
// Action describes the type of action planned for an object.
// Not all action values are valid for all object types.
type Action int32
const (
Action_NOOP Action = 0
Action_CREATE Action = 1
Action_READ Action = 2
Action_UPDATE Action = 3
Action_REPLACE Action = 4
Action_DELETE Action = 5
)
var Action_name = map[int32]string{
0: "NOOP",
1: "CREATE",
2: "READ",
3: "UPDATE",
4: "REPLACE",
5: "DELETE",
}
var Action_value = map[string]int32{
"NOOP": 0,
"CREATE": 1,
"READ": 2,
"UPDATE": 3,
"REPLACE": 4,
"DELETE": 5,
}
func (x Action) String() string {
return proto.EnumName(Action_name, int32(x))
}
func (Action) EnumDescriptor() ([]byte, []int) {
return fileDescriptor_planfile_78f69d66ae9e7fdf, []int{0}
}
type ResourceInstanceChange_ResourceMode int32
const (
ResourceInstanceChange_managed ResourceInstanceChange_ResourceMode = 0
ResourceInstanceChange_data ResourceInstanceChange_ResourceMode = 1
)
var ResourceInstanceChange_ResourceMode_name = map[int32]string{
0: "managed",
1: "data",
}
var ResourceInstanceChange_ResourceMode_value = map[string]int32{
"managed": 0,
"data": 1,
}
func (x ResourceInstanceChange_ResourceMode) String() string {
return proto.EnumName(ResourceInstanceChange_ResourceMode_name, int32(x))
}
func (ResourceInstanceChange_ResourceMode) EnumDescriptor() ([]byte, []int) {
return fileDescriptor_planfile_78f69d66ae9e7fdf, []int{2, 0}
}
// Plan is the root message type for the tfplan file
type Plan struct {
// Version is incremented whenever there is a breaking change to
// the serialization format. Programs reading serialized plans should
// verify that version is set to the expected value and abort processing
// if not. A breaking change is any change that may cause an older
// consumer to interpret the structure incorrectly. This number will
// not be incremented if an existing consumer can either safely ignore
// changes to the format or if an existing consumer would fail to process
// the file for another message- or field-specific reason.
Version uint64 `protobuf:"varint,1,opt,name=version,proto3" json:"version,omitempty"`
// The variables that were set when creating the plan. Each value is
// a msgpack serialization of an HCL value.
Variables map[string]*DynamicValue `protobuf:"bytes,2,rep,name=variables,proto3" json:"variables,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
// An unordered set of proposed changes to resources throughout the
// configuration, including any nested modules. Use the address of
// each resource to determine which module it belongs to.
ResourceChanges []*ResourceInstanceChange `protobuf:"bytes,3,rep,name=resource_changes,json=resourceChanges,proto3" json:"resource_changes,omitempty"`
// An unordered set of proposed changes to outputs in the root module
// of the configuration. This set also includes "no action" changes for
// outputs that are not changing, as context for detecting inconsistencies
// at apply time.
OutputChanges []*OutputChange `protobuf:"bytes,4,rep,name=output_changes,json=outputChanges,proto3" json:"output_changes,omitempty"`
// The version string for the Terraform binary that created this plan.
TerraformVersion string `protobuf:"bytes,14,opt,name=terraform_version,json=terraformVersion,proto3" json:"terraform_version,omitempty"`
// SHA256 digests of all of the provider plugin binaries that were used
// in the creation of this plan.
ProviderHashes map[string]*Hash `protobuf:"bytes,15,rep,name=provider_hashes,json=providerHashes,proto3" json:"provider_hashes,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *Plan) Reset() { *m = Plan{} }
func (m *Plan) String() string { return proto.CompactTextString(m) }
func (*Plan) ProtoMessage() {}
func (*Plan) Descriptor() ([]byte, []int) {
return fileDescriptor_planfile_78f69d66ae9e7fdf, []int{0}
}
func (m *Plan) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_Plan.Unmarshal(m, b)
}
func (m *Plan) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
return xxx_messageInfo_Plan.Marshal(b, m, deterministic)
}
func (dst *Plan) XXX_Merge(src proto.Message) {
xxx_messageInfo_Plan.Merge(dst, src)
}
func (m *Plan) XXX_Size() int {
return xxx_messageInfo_Plan.Size(m)
}
func (m *Plan) XXX_DiscardUnknown() {
xxx_messageInfo_Plan.DiscardUnknown(m)
}
var xxx_messageInfo_Plan proto.InternalMessageInfo
func (m *Plan) GetVersion() uint64 {
if m != nil {
return m.Version
}
return 0
}
func (m *Plan) GetVariables() map[string]*DynamicValue {
if m != nil {
return m.Variables
}
return nil
}
func (m *Plan) GetResourceChanges() []*ResourceInstanceChange {
if m != nil {
return m.ResourceChanges
}
return nil
}
func (m *Plan) GetOutputChanges() []*OutputChange {
if m != nil {
return m.OutputChanges
}
return nil
}
func (m *Plan) GetTerraformVersion() string {
if m != nil {
return m.TerraformVersion
}
return ""
}
func (m *Plan) GetProviderHashes() map[string]*Hash {
if m != nil {
return m.ProviderHashes
}
return nil
}
// Change represents a change made to some object, transforming it from an old
// state to a new state.
type Change struct {
// Not all action values are valid for all object types. Consult
// the documentation for any message that embeds Change.
Action Action `protobuf:"varint,1,opt,name=action,proto3,enum=tfplan.Action" json:"action,omitempty"`
// msgpack-encoded HCL values involved in the change.
// - For update and replace, two values are provided that give the old and new values,
// respectively.
// - For create, one value is provided that gives the new value to be created
// - For delete, one value is provided that describes the value being deleted
// - For read, two values are provided that give the prior value for this object
// (or null, if no prior value exists) and the value that was or will be read,
// respectively.
// - For no-op, one value is provided that is left unmodified by this non-change.
Values []*DynamicValue `protobuf:"bytes,2,rep,name=values,proto3" json:"values,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *Change) Reset() { *m = Change{} }
func (m *Change) String() string { return proto.CompactTextString(m) }
func (*Change) ProtoMessage() {}
func (*Change) Descriptor() ([]byte, []int) {
return fileDescriptor_planfile_78f69d66ae9e7fdf, []int{1}
}
func (m *Change) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_Change.Unmarshal(m, b)
}
func (m *Change) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
return xxx_messageInfo_Change.Marshal(b, m, deterministic)
}
func (dst *Change) XXX_Merge(src proto.Message) {
xxx_messageInfo_Change.Merge(dst, src)
}
func (m *Change) XXX_Size() int {
return xxx_messageInfo_Change.Size(m)
}
func (m *Change) XXX_DiscardUnknown() {
xxx_messageInfo_Change.DiscardUnknown(m)
}
var xxx_messageInfo_Change proto.InternalMessageInfo
func (m *Change) GetAction() Action {
if m != nil {
return m.Action
}
return Action_NOOP
}
func (m *Change) GetValues() []*DynamicValue {
if m != nil {
return m.Values
}
return nil
}
type ResourceInstanceChange struct {
// module_path is an address to the module that defined this resource.
// module_path is omitted for resources in the root module. For descendent modules
// it is a string like module.foo.module.bar as would be seen at the beginning of a
// resource address. The format of this string is not yet frozen and so external
// callers should treat it as an opaque key for filtering purposes.
ModulePath string `protobuf:"bytes,1,opt,name=module_path,json=modulePath,proto3" json:"module_path,omitempty"`
// mode is the resource mode.
Mode ResourceInstanceChange_ResourceMode `protobuf:"varint,2,opt,name=mode,proto3,enum=tfplan.ResourceInstanceChange_ResourceMode" json:"mode,omitempty"`
// type is the resource type name, like "aws_instance".
Type string `protobuf:"bytes,3,opt,name=type,proto3" json:"type,omitempty"`
// name is the logical name of the resource as defined in configuration.
// For example, in aws_instance.foo this would be "foo".
Name string `protobuf:"bytes,4,opt,name=name,proto3" json:"name,omitempty"`
// instance_key is either an integer index or a string key, depending on which iteration
// attributes ("count" or "for_each") are being used for this resource. If none
// are in use, this field is omitted.
//
// Types that are valid to be assigned to InstanceKey:
// *ResourceInstanceChange_Str
// *ResourceInstanceChange_Int
InstanceKey isResourceInstanceChange_InstanceKey `protobuf_oneof:"instance_key"`
// deposed_key, if set, indicates that this change applies to a deposed
// object for the indicated instance with the given deposed key. If not
// set, the change applies to the instance's current object.
DeposedKey string `protobuf:"bytes,7,opt,name=deposed_key,json=deposedKey,proto3" json:"deposed_key,omitempty"`
// Description of the proposed change. May use "create", "read", "update",
// "replace" and "delete" actions. "no-op" changes are not currently used here
// but consumers must accept and discard them to allow for future expansion.
Change *Change `protobuf:"bytes,8,opt,name=change,proto3" json:"change,omitempty"`
// msgpack representation of an arbitrary object value provided by
// the resource provider as additional context for the change. Must
// be considered an opaque value for any consumer other than the
// provider that generated it.
Private *DynamicValue `protobuf:"bytes,9,opt,name=private,proto3" json:"private,omitempty"`
// An unordered set of paths that prompted the change action to be
// "replace" rather than "update". Empty for any action other than
// "replace".
RequiredReplace []*Path `protobuf:"bytes,10,rep,name=required_replace,json=requiredReplace,proto3" json:"required_replace,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *ResourceInstanceChange) Reset() { *m = ResourceInstanceChange{} }
func (m *ResourceInstanceChange) String() string { return proto.CompactTextString(m) }
func (*ResourceInstanceChange) ProtoMessage() {}
func (*ResourceInstanceChange) Descriptor() ([]byte, []int) {
return fileDescriptor_planfile_78f69d66ae9e7fdf, []int{2}
}
func (m *ResourceInstanceChange) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_ResourceInstanceChange.Unmarshal(m, b)
}
func (m *ResourceInstanceChange) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
return xxx_messageInfo_ResourceInstanceChange.Marshal(b, m, deterministic)
}
func (dst *ResourceInstanceChange) XXX_Merge(src proto.Message) {
xxx_messageInfo_ResourceInstanceChange.Merge(dst, src)
}
func (m *ResourceInstanceChange) XXX_Size() int {
return xxx_messageInfo_ResourceInstanceChange.Size(m)
}
func (m *ResourceInstanceChange) XXX_DiscardUnknown() {
xxx_messageInfo_ResourceInstanceChange.DiscardUnknown(m)
}
var xxx_messageInfo_ResourceInstanceChange proto.InternalMessageInfo
type isResourceInstanceChange_InstanceKey interface {
isResourceInstanceChange_InstanceKey()
}
type ResourceInstanceChange_Str struct {
Str string `protobuf:"bytes,5,opt,name=str,proto3,oneof"`
}
type ResourceInstanceChange_Int struct {
Int int64 `protobuf:"varint,6,opt,name=int,proto3,oneof"`
}
func (*ResourceInstanceChange_Str) isResourceInstanceChange_InstanceKey() {}
func (*ResourceInstanceChange_Int) isResourceInstanceChange_InstanceKey() {}
func (m *ResourceInstanceChange) GetInstanceKey() isResourceInstanceChange_InstanceKey {
if m != nil {
return m.InstanceKey
}
return nil
}
func (m *ResourceInstanceChange) GetModulePath() string {
if m != nil {
return m.ModulePath
}
return ""
}
func (m *ResourceInstanceChange) GetMode() ResourceInstanceChange_ResourceMode {
if m != nil {
return m.Mode
}
return ResourceInstanceChange_managed
}
func (m *ResourceInstanceChange) GetType() string {
if m != nil {
return m.Type
}
return ""
}
func (m *ResourceInstanceChange) GetName() string {
if m != nil {
return m.Name
}
return ""
}
func (m *ResourceInstanceChange) GetStr() string {
if x, ok := m.GetInstanceKey().(*ResourceInstanceChange_Str); ok {
return x.Str
}
return ""
}
func (m *ResourceInstanceChange) GetInt() int64 {
if x, ok := m.GetInstanceKey().(*ResourceInstanceChange_Int); ok {
return x.Int
}
return 0
}
func (m *ResourceInstanceChange) GetDeposedKey() string {
if m != nil {
return m.DeposedKey
}
return ""
}
func (m *ResourceInstanceChange) GetChange() *Change {
if m != nil {
return m.Change
}
return nil
}
func (m *ResourceInstanceChange) GetPrivate() *DynamicValue {
if m != nil {
return m.Private
}
return nil
}
func (m *ResourceInstanceChange) GetRequiredReplace() []*Path {
if m != nil {
return m.RequiredReplace
}
return nil
}
// XXX_OneofFuncs is for the internal use of the proto package.
func (*ResourceInstanceChange) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
return _ResourceInstanceChange_OneofMarshaler, _ResourceInstanceChange_OneofUnmarshaler, _ResourceInstanceChange_OneofSizer, []interface{}{
(*ResourceInstanceChange_Str)(nil),
(*ResourceInstanceChange_Int)(nil),
}
}
func _ResourceInstanceChange_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
m := msg.(*ResourceInstanceChange)
// instance_key
switch x := m.InstanceKey.(type) {
case *ResourceInstanceChange_Str:
b.EncodeVarint(5<<3 | proto.WireBytes)
b.EncodeStringBytes(x.Str)
case *ResourceInstanceChange_Int:
b.EncodeVarint(6<<3 | proto.WireVarint)
b.EncodeVarint(uint64(x.Int))
case nil:
default:
return fmt.Errorf("ResourceInstanceChange.InstanceKey has unexpected type %T", x)
}
return nil
}
func _ResourceInstanceChange_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
m := msg.(*ResourceInstanceChange)
switch tag {
case 5: // instance_key.str
if wire != proto.WireBytes {
return true, proto.ErrInternalBadWireType
}
x, err := b.DecodeStringBytes()
m.InstanceKey = &ResourceInstanceChange_Str{x}
return true, err
case 6: // instance_key.int
if wire != proto.WireVarint {
return true, proto.ErrInternalBadWireType
}
x, err := b.DecodeVarint()
m.InstanceKey = &ResourceInstanceChange_Int{int64(x)}
return true, err
default:
return false, nil
}
}
func _ResourceInstanceChange_OneofSizer(msg proto.Message) (n int) {
m := msg.(*ResourceInstanceChange)
// instance_key
switch x := m.InstanceKey.(type) {
case *ResourceInstanceChange_Str:
n += 1 // tag and wire
n += proto.SizeVarint(uint64(len(x.Str)))
n += len(x.Str)
case *ResourceInstanceChange_Int:
n += 1 // tag and wire
n += proto.SizeVarint(uint64(x.Int))
case nil:
default:
panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
}
return n
}
type OutputChange struct {
// Name of the output as defined in the root module.
Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
// Description of the proposed change. May use "no-op", "create",
// "update" and "delete" actions.
Change *Change `protobuf:"bytes,2,opt,name=change,proto3" json:"change,omitempty"`
// Sensitive, if true, indicates that one or more of the values given
// in "change" is sensitive and should not be shown directly in any
// rendered plan.
Sensitive bool `protobuf:"varint,3,opt,name=sensitive,proto3" json:"sensitive,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *OutputChange) Reset() { *m = OutputChange{} }
func (m *OutputChange) String() string { return proto.CompactTextString(m) }
func (*OutputChange) ProtoMessage() {}
func (*OutputChange) Descriptor() ([]byte, []int) {
return fileDescriptor_planfile_78f69d66ae9e7fdf, []int{3}
}
func (m *OutputChange) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_OutputChange.Unmarshal(m, b)
}
func (m *OutputChange) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
return xxx_messageInfo_OutputChange.Marshal(b, m, deterministic)
}
func (dst *OutputChange) XXX_Merge(src proto.Message) {
xxx_messageInfo_OutputChange.Merge(dst, src)
}
func (m *OutputChange) XXX_Size() int {
return xxx_messageInfo_OutputChange.Size(m)
}
func (m *OutputChange) XXX_DiscardUnknown() {
xxx_messageInfo_OutputChange.DiscardUnknown(m)
}
var xxx_messageInfo_OutputChange proto.InternalMessageInfo
func (m *OutputChange) GetName() string {
if m != nil {
return m.Name
}
return ""
}
func (m *OutputChange) GetChange() *Change {
if m != nil {
return m.Change
}
return nil
}
func (m *OutputChange) GetSensitive() bool {
if m != nil {
return m.Sensitive
}
return false
}
// DynamicValue represents a value whose type is not decided until runtime,
// often based on schema information obtained from a plugin.
//
// At present dynamic values are always encoded as msgpack, with extension
// id 0 used to represent the special "unknown" value indicating results
// that won't be known until after apply.
//
// In future other serialization formats may be used, possibly with a
// transitional period of including both as separate attributes of this type.
// Consumers must ignore attributes they don't support and fail if no supported
// attribute is present. The top-level format version will not be incremented
// for changes to the set of dynamic serialization formats.
type DynamicValue struct {
Msgpack []byte `protobuf:"bytes,1,opt,name=msgpack,proto3" json:"msgpack,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *DynamicValue) Reset() { *m = DynamicValue{} }
func (m *DynamicValue) String() string { return proto.CompactTextString(m) }
func (*DynamicValue) ProtoMessage() {}
func (*DynamicValue) Descriptor() ([]byte, []int) {
return fileDescriptor_planfile_78f69d66ae9e7fdf, []int{4}
}
func (m *DynamicValue) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_DynamicValue.Unmarshal(m, b)
}
func (m *DynamicValue) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
return xxx_messageInfo_DynamicValue.Marshal(b, m, deterministic)
}
func (dst *DynamicValue) XXX_Merge(src proto.Message) {
xxx_messageInfo_DynamicValue.Merge(dst, src)
}
func (m *DynamicValue) XXX_Size() int {
return xxx_messageInfo_DynamicValue.Size(m)
}
func (m *DynamicValue) XXX_DiscardUnknown() {
xxx_messageInfo_DynamicValue.DiscardUnknown(m)
}
var xxx_messageInfo_DynamicValue proto.InternalMessageInfo
func (m *DynamicValue) GetMsgpack() []byte {
if m != nil {
return m.Msgpack
}
return nil
}
// Hash represents a hash value.
//
// At present hashes always use the SHA256 algorithm. In future other hash
// algorithms may be used, possibly with a transitional period of including
// both as separate attributes of this type. Consumers must ignore attributes
// they don't support and fail if no supported attribute is present. The
// top-level format version will not be incremented for changes to the set of
// hash algorithms.
type Hash struct {
Sha256 []byte `protobuf:"bytes,1,opt,name=sha256,proto3" json:"sha256,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *Hash) Reset() { *m = Hash{} }
func (m *Hash) String() string { return proto.CompactTextString(m) }
func (*Hash) ProtoMessage() {}
func (*Hash) Descriptor() ([]byte, []int) {
return fileDescriptor_planfile_78f69d66ae9e7fdf, []int{5}
}
func (m *Hash) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_Hash.Unmarshal(m, b)
}
func (m *Hash) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
return xxx_messageInfo_Hash.Marshal(b, m, deterministic)
}
func (dst *Hash) XXX_Merge(src proto.Message) {
xxx_messageInfo_Hash.Merge(dst, src)
}
func (m *Hash) XXX_Size() int {
return xxx_messageInfo_Hash.Size(m)
}
func (m *Hash) XXX_DiscardUnknown() {
xxx_messageInfo_Hash.DiscardUnknown(m)
}
var xxx_messageInfo_Hash proto.InternalMessageInfo
func (m *Hash) GetSha256() []byte {
if m != nil {
return m.Sha256
}
return nil
}
// Path represents a set of steps to traverse into a data structure. It is
// used to refer to a sub-structure within a dynamic data structure presented
// separately.
type Path struct {
Steps []*Path_Step `protobuf:"bytes,1,rep,name=steps,proto3" json:"steps,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *Path) Reset() { *m = Path{} }
func (m *Path) String() string { return proto.CompactTextString(m) }
func (*Path) ProtoMessage() {}
func (*Path) Descriptor() ([]byte, []int) {
return fileDescriptor_planfile_78f69d66ae9e7fdf, []int{6}
}
func (m *Path) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_Path.Unmarshal(m, b)
}
func (m *Path) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
return xxx_messageInfo_Path.Marshal(b, m, deterministic)
}
func (dst *Path) XXX_Merge(src proto.Message) {
xxx_messageInfo_Path.Merge(dst, src)
}
func (m *Path) XXX_Size() int {
return xxx_messageInfo_Path.Size(m)
}
func (m *Path) XXX_DiscardUnknown() {
xxx_messageInfo_Path.DiscardUnknown(m)
}
var xxx_messageInfo_Path proto.InternalMessageInfo
func (m *Path) GetSteps() []*Path_Step {
if m != nil {
return m.Steps
}
return nil
}
type Path_Step struct {
// Types that are valid to be assigned to Selector:
// *Path_Step_AttributeName
// *Path_Step_ElementKey
Selector isPath_Step_Selector `protobuf_oneof:"selector"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *Path_Step) Reset() { *m = Path_Step{} }
func (m *Path_Step) String() string { return proto.CompactTextString(m) }
func (*Path_Step) ProtoMessage() {}
func (*Path_Step) Descriptor() ([]byte, []int) {
return fileDescriptor_planfile_78f69d66ae9e7fdf, []int{6, 0}
}
func (m *Path_Step) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_Path_Step.Unmarshal(m, b)
}
func (m *Path_Step) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
return xxx_messageInfo_Path_Step.Marshal(b, m, deterministic)
}
func (dst *Path_Step) XXX_Merge(src proto.Message) {
xxx_messageInfo_Path_Step.Merge(dst, src)
}
func (m *Path_Step) XXX_Size() int {
return xxx_messageInfo_Path_Step.Size(m)
}
func (m *Path_Step) XXX_DiscardUnknown() {
xxx_messageInfo_Path_Step.DiscardUnknown(m)
}
var xxx_messageInfo_Path_Step proto.InternalMessageInfo
type isPath_Step_Selector interface {
isPath_Step_Selector()
}
type Path_Step_AttributeName struct {
AttributeName string `protobuf:"bytes,1,opt,name=attribute_name,json=attributeName,proto3,oneof"`
}
type Path_Step_ElementKey struct {
ElementKey *DynamicValue `protobuf:"bytes,2,opt,name=element_key,json=elementKey,proto3,oneof"`
}
func (*Path_Step_AttributeName) isPath_Step_Selector() {}
func (*Path_Step_ElementKey) isPath_Step_Selector() {}
func (m *Path_Step) GetSelector() isPath_Step_Selector {
if m != nil {
return m.Selector
}
return nil
}
func (m *Path_Step) GetAttributeName() string {
if x, ok := m.GetSelector().(*Path_Step_AttributeName); ok {
return x.AttributeName
}
return ""
}
func (m *Path_Step) GetElementKey() *DynamicValue {
if x, ok := m.GetSelector().(*Path_Step_ElementKey); ok {
return x.ElementKey
}
return nil
}
// XXX_OneofFuncs is for the internal use of the proto package.
func (*Path_Step) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
return _Path_Step_OneofMarshaler, _Path_Step_OneofUnmarshaler, _Path_Step_OneofSizer, []interface{}{
(*Path_Step_AttributeName)(nil),
(*Path_Step_ElementKey)(nil),
}
}
func _Path_Step_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
m := msg.(*Path_Step)
// selector
switch x := m.Selector.(type) {
case *Path_Step_AttributeName:
b.EncodeVarint(1<<3 | proto.WireBytes)
b.EncodeStringBytes(x.AttributeName)
case *Path_Step_ElementKey:
b.EncodeVarint(2<<3 | proto.WireBytes)
if err := b.EncodeMessage(x.ElementKey); err != nil {
return err
}
case nil:
default:
return fmt.Errorf("Path_Step.Selector has unexpected type %T", x)
}
return nil
}
func _Path_Step_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
m := msg.(*Path_Step)
switch tag {
case 1: // selector.attribute_name
if wire != proto.WireBytes {
return true, proto.ErrInternalBadWireType
}
x, err := b.DecodeStringBytes()
m.Selector = &Path_Step_AttributeName{x}
return true, err
case 2: // selector.element_key
if wire != proto.WireBytes {
return true, proto.ErrInternalBadWireType
}
msg := new(DynamicValue)
err := b.DecodeMessage(msg)
m.Selector = &Path_Step_ElementKey{msg}
return true, err
default:
return false, nil
}
}
func _Path_Step_OneofSizer(msg proto.Message) (n int) {
m := msg.(*Path_Step)
// selector
switch x := m.Selector.(type) {
case *Path_Step_AttributeName:
n += 1 // tag and wire
n += proto.SizeVarint(uint64(len(x.AttributeName)))
n += len(x.AttributeName)
case *Path_Step_ElementKey:
s := proto.Size(x.ElementKey)
n += 1 // tag and wire
n += proto.SizeVarint(uint64(s))
n += s
case nil:
default:
panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
}
return n
}
func init() {
proto.RegisterType((*Plan)(nil), "tfplan.Plan")
proto.RegisterMapType((map[string]*Hash)(nil), "tfplan.Plan.ProviderHashesEntry")
proto.RegisterMapType((map[string]*DynamicValue)(nil), "tfplan.Plan.VariablesEntry")
proto.RegisterType((*Change)(nil), "tfplan.Change")
proto.RegisterType((*ResourceInstanceChange)(nil), "tfplan.ResourceInstanceChange")
proto.RegisterType((*OutputChange)(nil), "tfplan.OutputChange")
proto.RegisterType((*DynamicValue)(nil), "tfplan.DynamicValue")
proto.RegisterType((*Hash)(nil), "tfplan.Hash")
proto.RegisterType((*Path)(nil), "tfplan.Path")
proto.RegisterType((*Path_Step)(nil), "tfplan.Path.Step")
proto.RegisterEnum("tfplan.Action", Action_name, Action_value)
proto.RegisterEnum("tfplan.ResourceInstanceChange_ResourceMode", ResourceInstanceChange_ResourceMode_name, ResourceInstanceChange_ResourceMode_value)
}
func init() { proto.RegisterFile("planfile.proto", fileDescriptor_planfile_78f69d66ae9e7fdf) }
var fileDescriptor_planfile_78f69d66ae9e7fdf = []byte{
// 794 bytes of a gzipped FileDescriptorProto
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}

183
plans/internal/planproto/planfile.proto Normal file
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@ -0,0 +1,183 @@
syntax = "proto3";
package tfplan;
// For Terraform's own parsing, the proto stub types go into an internal Go
// package. The public API is in github.com/hashicorp/terraform/plans/planfile .
option go_package = "github.com/hashicorp/terraform/plans/internal/planproto";
// Plan is the root message type for the tfplan file
message Plan {
// Version is incremented whenever there is a breaking change to
// the serialization format. Programs reading serialized plans should
// verify that version is set to the expected value and abort processing
// if not. A breaking change is any change that may cause an older
// consumer to interpret the structure incorrectly. This number will
// not be incremented if an existing consumer can either safely ignore
// changes to the format or if an existing consumer would fail to process
// the file for another message- or field-specific reason.
uint64 version = 1;
// The variables that were set when creating the plan. Each value is
// a msgpack serialization of an HCL value.
map<string, DynamicValue> variables = 2;
// An unordered set of proposed changes to resources throughout the
// configuration, including any nested modules. Use the address of
// each resource to determine which module it belongs to.
repeated ResourceInstanceChange resource_changes = 3;
// An unordered set of proposed changes to outputs in the root module
// of the configuration. This set also includes "no action" changes for
// outputs that are not changing, as context for detecting inconsistencies
// at apply time.
repeated OutputChange output_changes = 4;
// The version string for the Terraform binary that created this plan.
string terraform_version = 14;
// SHA256 digests of all of the provider plugin binaries that were used
// in the creation of this plan.
map<string, Hash> provider_hashes = 15;
}
// Action describes the type of action planned for an object.
// Not all action values are valid for all object types.
enum Action {
NOOP = 0;
CREATE = 1;
READ = 2;
UPDATE = 3;
REPLACE = 4;
DELETE = 5;
}
// Change represents a change made to some object, transforming it from an old
// state to a new state.
message Change {
// Not all action values are valid for all object types. Consult
// the documentation for any message that embeds Change.
Action action = 1;
// msgpack-encoded HCL values involved in the change.
// - For update and replace, two values are provided that give the old and new values,
// respectively.
// - For create, one value is provided that gives the new value to be created
// - For delete, one value is provided that describes the value being deleted
// - For read, two values are provided that give the prior value for this object
// (or null, if no prior value exists) and the value that was or will be read,
// respectively.
// - For no-op, one value is provided that is left unmodified by this non-change.
repeated DynamicValue values = 2;
}
message ResourceInstanceChange {
// module_path is an address to the module that defined this resource.
// module_path is omitted for resources in the root module. For descendent modules
// it is a string like module.foo.module.bar as would be seen at the beginning of a
// resource address. The format of this string is not yet frozen and so external
// callers should treat it as an opaque key for filtering purposes.
string module_path = 1;
// mode is the resource mode.
ResourceMode mode = 2;
enum ResourceMode {
managed = 0; // for "resource" blocks in configuration
data = 1; // for "data" blocks in configuration
}
// type is the resource type name, like "aws_instance".
string type = 3;
// name is the logical name of the resource as defined in configuration.
// For example, in aws_instance.foo this would be "foo".
string name = 4;
// instance_key is either an integer index or a string key, depending on which iteration
// attributes ("count" or "for_each") are being used for this resource. If none
// are in use, this field is omitted.
oneof instance_key {
string str = 5;
int64 int = 6;
};
// deposed_key, if set, indicates that this change applies to a deposed
// object for the indicated instance with the given deposed key. If not
// set, the change applies to the instance's current object.
string deposed_key = 7;
// Description of the proposed change. May use "create", "read", "update",
// "replace" and "delete" actions. "no-op" changes are not currently used here
// but consumers must accept and discard them to allow for future expansion.
Change change = 8;
// msgpack representation of an arbitrary object value provided by
// the resource provider as additional context for the change. Must
// be considered an opaque value for any consumer other than the
// provider that generated it.
DynamicValue private = 9;
// An unordered set of paths that prompted the change action to be
// "replace" rather than "update". Empty for any action other than
// "replace".
repeated Path required_replace = 10;
}
message OutputChange {
// Name of the output as defined in the root module.
string name = 1;
// Description of the proposed change. May use "no-op", "create",
// "update" and "delete" actions.
Change change = 2;
// Sensitive, if true, indicates that one or more of the values given
// in "change" is sensitive and should not be shown directly in any
// rendered plan.
bool sensitive = 3;
}
// DynamicValue represents a value whose type is not decided until runtime,
// often based on schema information obtained from a plugin.
//
// At present dynamic values are always encoded as msgpack, with extension
// id 0 used to represent the special "unknown" value indicating results
// that won't be known until after apply.
//
// In future other serialization formats may be used, possibly with a
// transitional period of including both as separate attributes of this type.
// Consumers must ignore attributes they don't support and fail if no supported
// attribute is present. The top-level format version will not be incremented
// for changes to the set of dynamic serialization formats.
message DynamicValue {
bytes msgpack = 1;
}
// Hash represents a hash value.
//
// At present hashes always use the SHA256 algorithm. In future other hash
// algorithms may be used, possibly with a transitional period of including
// both as separate attributes of this type. Consumers must ignore attributes
// they don't support and fail if no supported attribute is present. The
// top-level format version will not be incremented for changes to the set of
// hash algorithms.
message Hash {
bytes sha256 = 1;
}
// Path represents a set of steps to traverse into a data structure. It is
// used to refer to a sub-structure within a dynamic data structure presented
// separately.
message Path {
message Step {
oneof selector {
// Set "attribute_name" to represent looking up an attribute
// in the current object value.
string attribute_name = 1;
// Set "element_key" to represent looking up an element in
// an indexable collection type.
DynamicValue element_key = 2;
}
}
repeated Step steps = 1;
}

218
plans/planfile/config_snapshot.go Normal file
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@ -0,0 +1,218 @@
package planfile
import (
"archive/zip"
"encoding/json"
"fmt"
"io/ioutil"
"path"
"sort"
"strings"
"time"
version "github.com/hashicorp/go-version"
"github.com/hashicorp/terraform/configs/configload"
)
const configSnapshotPrefix = "tfconfig/"
const configSnapshotManifestFile = configSnapshotPrefix + "modules.json"
const configSnapshotModulePrefix = configSnapshotPrefix + "m-"
type configSnapshotModuleRecord struct {
Key string `json:"Key"`
SourceAddr string `json:"Source,omitempty"`
VersionStr string `json:"Version,omitempty"`
Dir string `json:"Dir"`
}
type configSnapshotModuleManifest []configSnapshotModuleRecord
func readConfigSnapshot(z *zip.Reader) (*configload.Snapshot, error) {
// Errors from this function are expected to be reported with some
// additional prefix context about them being in a config snapshot,
// so they should not themselves refer to the config snapshot.
// They are also generally indicative of an invalid file, and so since
// plan files should not be hand-constructed we don't need to worry
// about making the messages user-actionable.
snap := &configload.Snapshot{
Modules: map[string]*configload.SnapshotModule{},
}
var manifestSrc []byte
// For processing our source files, we'll just sweep over all the files
// and react to the one-by-one to start, and then clean up afterwards
// when we'll presumably have found the manifest file.
for _, file := range z.File {
switch {
case file.Name == configSnapshotManifestFile:
// It's the manifest file, so we'll just read it raw into
// manifestSrc for now and process it below.
r, err := file.Open()
if err != nil {
return nil, fmt.Errorf("failed to open module manifest: %s", r)
}
manifestSrc, err = ioutil.ReadAll(r)
if err != nil {
return nil, fmt.Errorf("failed to read module manifest: %s", r)
}
case strings.HasPrefix(file.Name, configSnapshotModulePrefix):
relName := file.Name[len(configSnapshotModulePrefix):]
moduleKey, fileName := path.Split(relName)
// moduleKey should currently have a trailing slash on it, which we
// can use to recognize the difference between the root module
// (just a trailing slash) and no module path at all (empty string).
if moduleKey == "" {
// ignore invalid config entry
continue
}
moduleKey = moduleKey[:len(moduleKey)-1] // trim trailing slash
r, err := file.Open()
if err != nil {
return nil, fmt.Errorf("failed to open snapshot of %s from module %q: %s", fileName, moduleKey, err)
}
fileSrc, err := ioutil.ReadAll(r)
if err != nil {
return nil, fmt.Errorf("failed to read snapshot of %s from module %q: %s", fileName, moduleKey, err)
}
if _, exists := snap.Modules[moduleKey]; !exists {
snap.Modules[moduleKey] = &configload.SnapshotModule{
Files: map[string][]byte{},
// Will fill in everything else afterwards, when we
// process the manifest.
}
}
snap.Modules[moduleKey].Files[fileName] = fileSrc
}
}
if manifestSrc == nil {
return nil, fmt.Errorf("config snapshot does not have manifest file")
}
var manifest configSnapshotModuleManifest
err := json.Unmarshal(manifestSrc, &manifest)
if err != nil {
return nil, fmt.Errorf("invalid module manifest: %s", err)
}
for _, record := range manifest {
modSnap, exists := snap.Modules[record.Key]
if !exists {
// We'll allow this, assuming that it's a module with no files.
// This is still weird, since we generally reject modules with
// no files, but we'll allow it because downstream errors will
// catch it in that case.
modSnap = &configload.SnapshotModule{
Files: map[string][]byte{},
}
snap.Modules[record.Key] = modSnap
}
modSnap.SourceAddr = record.SourceAddr
modSnap.Dir = record.Dir
if record.VersionStr != "" {
v, err := version.NewVersion(record.VersionStr)
if err != nil {
return nil, fmt.Errorf("manifest has invalid version string %q for module %q", record.VersionStr, record.Key)
}
modSnap.Version = v
}
}
// Finally, we'll make sure we don't have any errant files for modules that
// aren't in the manifest.
for k := range snap.Modules {
found := false
for _, record := range manifest {
if record.Key == k {
found = true
break
}
}
if !found {
return nil, fmt.Errorf("found files for module %q that isn't recorded in the manifest", k)
}
}
return snap, nil
}
// writeConfigSnapshot adds to the given zip.Writer one or more files
// representing the given snapshot.
//
// This file creates new files in the writer, so any already-open writer
// for the file will be invalidated by this call. The writer remains open
// when this function returns.
func writeConfigSnapshot(snap *configload.Snapshot, z *zip.Writer) error {
// Errors from this function are expected to be reported with some
// additional prefix context about them being in a config snapshot,
// so they should not themselves refer to the config snapshot.
// They are also indicative of a bug in the caller, so they do not
// need to be user-actionable.
var manifest configSnapshotModuleManifest
keys := make([]string, 0, len(snap.Modules))
for k := range snap.Modules {
keys = append(keys, k)
}
sort.Strings(keys)
// We'll re-use this fileheader for each Create we do below.
for _, k := range keys {
snapMod := snap.Modules[k]
record := configSnapshotModuleRecord{
Dir: snapMod.Dir,
Key: k,
SourceAddr: snapMod.SourceAddr,
}
if snapMod.Version != nil {
record.VersionStr = snapMod.Version.String()
}
manifest = append(manifest, record)
pathPrefix := fmt.Sprintf("%s%s/", configSnapshotModulePrefix, k)
for filename, src := range snapMod.Files {
zh := &zip.FileHeader{
Name: pathPrefix + filename,
Method: zip.Deflate,
Modified: time.Now(),
}
w, err := z.CreateHeader(zh)
if err != nil {
return fmt.Errorf("failed to create snapshot of %s from module %q: %s", zh.Name, k, err)
}
_, err = w.Write(src)
if err != nil {
return fmt.Errorf("failed to write snapshot of %s from module %q: %s", zh.Name, k, err)
}
}
}
// Now we'll write our manifest
{
zh := &zip.FileHeader{
Name: configSnapshotManifestFile,
Method: zip.Deflate,
Modified: time.Now(),
}
src, err := json.MarshalIndent(manifest, "", " ")
if err != nil {
return fmt.Errorf("failed to serialize module manifest: %s", err)
}
w, err := z.CreateHeader(zh)
if err != nil {
return fmt.Errorf("failed to create module manifest: %s", err)
}
_, err = w.Write(src)
if err != nil {
return fmt.Errorf("failed to write module manifest: %s", err)
}
}
return nil
}

52
plans/planfile/config_snapshot_test.go Normal file
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package planfile
import (
"archive/zip"
"bytes"
"path/filepath"
"reflect"
"testing"
"github.com/davecgh/go-spew/spew"
"github.com/hashicorp/terraform/configs/configload"
)
func TestConfigSnapshotRoundtrip(t *testing.T) {
fixtureDir := filepath.Join("testdata", "test-config")
loader, err := configload.NewLoader(&configload.Config{
ModulesDir: filepath.Join(fixtureDir, ".terraform", "modules"),
})
if err != nil {
t.Fatal(err)
}
_, snapIn, diags := loader.LoadConfigWithSnapshot(fixtureDir)
if diags.HasErrors() {
t.Fatal(diags.Error())
}
var buf bytes.Buffer
zw := zip.NewWriter(&buf)
err = writeConfigSnapshot(snapIn, zw)
if err != nil {
t.Fatalf("failed to write snapshot: %s", err)
}
zw.Close()
raw := buf.Bytes()
r := bytes.NewReader(raw)
zr, err := zip.NewReader(r, int64(len(raw)))
if err != nil {
t.Fatal(err)
}
snapOut, err := readConfigSnapshot(zr)
if err != nil {
t.Fatalf("failed to read snapshot: %s", err)
}
if !reflect.DeepEqual(snapIn, snapOut) {
t.Errorf("result does not match input\nresult: %sinput: %s", spew.Sdump(snapOut), spew.Sdump(snapIn))
}
}

6
plans/planfile/doc.go Normal file
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// Package planfile deals with the file format used to serialize plans to disk
// and then deserialize them back into memory later.
//
// A plan file contains the planned changes along with the configuration and
// state snapshot that they are based on.
package planfile

112
plans/planfile/planfile_test.go Normal file
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package planfile
import (
"io/ioutil"
"path/filepath"
"reflect"
"testing"
"github.com/davecgh/go-spew/spew"
"github.com/hashicorp/terraform/plans"
version "github.com/hashicorp/go-version"
"github.com/hashicorp/terraform/configs/configload"
"github.com/hashicorp/terraform/states"
"github.com/hashicorp/terraform/states/statefile"
)
func TestRoundtrip(t *testing.T) {
fixtureDir := filepath.Join("testdata", "test-config")
loader, err := configload.NewLoader(&configload.Config{
ModulesDir: filepath.Join(fixtureDir, ".terraform", "modules"),
})
if err != nil {
t.Fatal(err)
}
_, snapIn, diags := loader.LoadConfigWithSnapshot(fixtureDir)
if diags.HasErrors() {
t.Fatal(diags.Error())
}
// Just a minimal state file so we can test that it comes out again at all.
// We don't need to test the entire thing because the state file
// serialization is already tested in its own package.
stateFileIn := &statefile.File{
TerraformVersion: version.Must(version.NewVersion("1.0.0")),
Serial: 1,
Lineage: "abc123",
State: states.NewState(),
}
// Minimal plan too, since the serialization of the tfplan portion of the
// file is tested more fully in tfplan_test.go .
planIn := &plans.Plan{
Changes: &plans.Changes{
Resources: []*plans.ResourceInstanceChange{},
RootOutputs: map[string]*plans.OutputChange{},
},
ProviderSHA256s: map[string][]byte{},
VariableValues: map[string]plans.DynamicValue{
"foo": plans.DynamicValue([]byte("foo placeholder")),
},
}
workDir, err := ioutil.TempDir("", "tf-planfile")
if err != nil {
t.Fatal(err)
}
planFn := filepath.Join(workDir, "tfplan")
err = Create(planFn, snapIn, stateFileIn, planIn)
if err != nil {
t.Fatalf("failed to create plan file: %s", err)
}
pr, err := Open(planFn)
if err != nil {
t.Fatalf("failed to open plan file for reading: %s", err)
}
t.Run("ReadPlan", func(t *testing.T) {
planOut, err := pr.ReadPlan()
if err != nil {
t.Fatalf("failed to read plan: %s", err)
}
if !reflect.DeepEqual(planIn, planOut) {
t.Errorf("plan did not survive round-trip\nresult: %sinput: %s", spew.Sdump(planOut), spew.Sdump(planIn))
}
})
t.Run("ReadStateFile", func(t *testing.T) {
stateFileOut, err := pr.ReadStateFile()
if err != nil {
t.Fatalf("failed to read state: %s", err)
}
if !reflect.DeepEqual(stateFileIn, stateFileOut) {
t.Errorf("state file did not survive round-trip\nresult: %sinput: %s", spew.Sdump(stateFileOut), spew.Sdump(stateFileIn))
}
})
t.Run("ReadConfigSnapshot", func(t *testing.T) {
snapOut, err := pr.ReadConfigSnapshot()
if err != nil {
t.Fatalf("failed to read config snapshot: %s", err)
}
if !reflect.DeepEqual(snapIn, snapOut) {
t.Errorf("config snapshot did not survive round-trip\nresult: %sinput: %s", spew.Sdump(snapOut), spew.Sdump(snapIn))
}
})
t.Run("ReadConfig", func(t *testing.T) {
// Reading from snapshots is tested in the configload package, so
// here we'll just test that we can successfully do it, to see if the
// glue code in _this_ package is correct.
_, diags := pr.ReadConfig()
if diags.HasErrors() {
t.Errorf("when reading config: %s", diags.Err())
}
})
}

148
plans/planfile/reader.go Normal file
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package planfile
import (
"archive/zip"
"bytes"
"fmt"
"io/ioutil"
"github.com/hashicorp/terraform/configs"
"github.com/hashicorp/terraform/configs/configload"
"github.com/hashicorp/terraform/plans"
"github.com/hashicorp/terraform/states/statefile"
"github.com/hashicorp/terraform/tfdiags"
)
const tfstateFilename = "tfstate"
// Reader is the main type used to read plan files. Create a Reader by calling
// Open.
//
// A plan file is a random-access file format, so methods of Reader must
// be used to access the individual portions of the file for further
// processing.
type Reader struct {
zip *zip.ReadCloser
}
// Open creates a Reader for the file at the given filename, or returns an
// error if the file doesn't seem to be a planfile.
func Open(filename string) (*Reader, error) {
r, err := zip.OpenReader(filename)
if err != nil {
// To give a better error message, we'll sniff to see if this looks
// like our old plan format from versions prior to 0.12.
if b, sErr := ioutil.ReadFile(filename); sErr == nil {
if bytes.HasPrefix(b, []byte("tfplan")) {
return nil, fmt.Errorf("the given plan file was created by an earlier version of Terraform; plan files cannot be shared between different Terraform versions")
}
}
return nil, err
}
// Sniff to make sure this looks like a plan file, as opposed to any other
// random zip file the user might have around.
var planFile *zip.File
for _, file := range r.File {
if file.Name == tfplanFilename {
planFile = file
break
}
}
if planFile == nil {
return nil, fmt.Errorf("the given file is not a valid plan file")
}
// For now, we'll just accept the presence of the tfplan file as enough,
// and wait to validate the version when the caller requests the plan
// itself.
return &Reader{
zip: r,
}, nil
}
// ReadPlan reads the plan embedded in the plan file.
//
// Errors can be returned for various reasons, including if the plan file
// is not of an appropriate format version, if it was created by a different
// version of Terraform, if it is invalid, etc.
func (r *Reader) ReadPlan() (*plans.Plan, error) {
var planFile *zip.File
for _, file := range r.zip.File {
if file.Name == tfplanFilename {
planFile = file
break
}
}
if planFile == nil {
// This should never happen because we checked for this file during
// Open, but we'll check anyway to be safe.
return nil, fmt.Errorf("the plan file is invalid")
}
pr, err := planFile.Open()
if err != nil {
return nil, fmt.Errorf("failed to retrieve plan from plan file: %s", err)
}
defer pr.Close()
return readTfplan(pr)
}
// ReadStateFile reads the state file embedded in the plan file.
//
// If the plan file contains no embedded state file, the returned error is
// statefile.ErrNoState.
func (r *Reader) ReadStateFile() (*statefile.File, error) {
for _, file := range r.zip.File {
if file.Name == tfstateFilename {
r, err := file.Open()
if err != nil {
return nil, fmt.Errorf("failed to extract state from plan file: %s", err)
}
return statefile.Read(r)
}
}
return nil, statefile.ErrNoState
}
// ReadConfigSnapshot reads the configuration snapshot embedded in the plan
// file.
//
// This is a lower-level alternative to ReadConfig that just extracts the
// source files, without attempting to parse them.
func (r *Reader) ReadConfigSnapshot() (*configload.Snapshot, error) {
return readConfigSnapshot(&r.zip.Reader)
}
// ReadConfig reads the configuration embedded in the plan file.
//
// Internally this function delegates to the configs/configload package to
// parse the embedded configuration and so it returns diagnostics (rather than
// a native Go error as with other methods on Reader).
func (r *Reader) ReadConfig() (*configs.Config, tfdiags.Diagnostics) {
var diags tfdiags.Diagnostics
snap, err := r.ReadConfigSnapshot()
if err != nil {
diags = diags.Append(tfdiags.Sourceless(
tfdiags.Error,
"Failed to read configuration from plan file",
fmt.Sprintf("The configuration file snapshot in the plan file could not be read: %s.", err),
))
return nil, diags
}
loader := configload.NewLoaderFromSnapshot(snap)
rootDir := snap.Modules[""].Dir // Root module base directory
config, configDiags := loader.LoadConfig(rootDir)
diags = diags.Append(configDiags)
return config, diags
}
// Close closes the file, after which no other operations may be performed.
func (r *Reader) Close() error {
return r.zip.Close()
}

4
plans/planfile/testdata/test-config/.terraform/modules/child_a/child_a.tf vendored Normal file
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@ -0,0 +1,4 @@
module "child_c" {
source = "./child_c"
}

4
plans/planfile/testdata/test-config/.terraform/modules/child_a/child_c/child_c.tf vendored Normal file
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@ -0,0 +1,4 @@
output "hello" {
value = "Hello from child_c"
}

4
plans/planfile/testdata/test-config/.terraform/modules/child_b.child_d/child_d.tf vendored Normal file
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@ -0,0 +1,4 @@
output "hello" {
value = "Hello from child_d"
}

5
plans/planfile/testdata/test-config/.terraform/modules/child_b/child_b.tf vendored Normal file
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@ -0,0 +1,5 @@
module "child_d" {
source = "example.com/foo/bar_d/baz"
# Intentionally no version here
}

32
plans/planfile/testdata/test-config/.terraform/modules/modules.json vendored Normal file
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@ -0,0 +1,32 @@
{
"Modules": [
{
"Key": "",
"Source": "",
"Dir": "testdata/test-config"
},
{
"Key": "child_a",
"Source": "example.com/foo/bar_a/baz",
"Version": "1.0.1",
"Dir": "testdata/test-config/.terraform/modules/child_a"
},
{
"Key": "child_b",
"Source": "example.com/foo/bar_b/baz",
"Version": "1.0.0",
"Dir": "testdata/test-config/.terraform/modules/child_b"
},
{
"Key": "child_a.child_c",
"Source": "./child_c",
"Dir": "testdata/test-config/.terraform/modules/child_a/child_c"
},
{
"Key": "child_b.child_d",
"Source": "example.com/foo/bar_d/baz",
"Version": "1.2.0",
"Dir": "testdata/test-config/.terraform/modules/child_b.child_d"
}
]
}

10
plans/planfile/testdata/test-config/root.tf vendored Normal file
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@ -0,0 +1,10 @@
module "child_a" {
source = "example.com/foo/bar_a/baz"
version = ">= 1.0.0"
}
module "child_b" {
source = "example.com/foo/bar_b/baz"
version = ">= 1.0.0"
}

390
plans/planfile/tfplan.go Normal file
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package planfile
import (
"fmt"
"io"
"io/ioutil"
"github.com/golang/protobuf/proto"
"github.com/hashicorp/terraform/addrs"
"github.com/hashicorp/terraform/plans"
"github.com/hashicorp/terraform/plans/internal/planproto"
"github.com/hashicorp/terraform/states"
"github.com/hashicorp/terraform/tfdiags"
"github.com/hashicorp/terraform/version"
)
const tfplanFormatVersion = 3
const tfplanFilename = "tfplan"
// ---------------------------------------------------------------------------
// This file deals with the internal structure of the "tfplan" sub-file within
// the plan file format. It's all private API, wrapped by methods defined
// elsewhere. This is the only file that should import the
// ../internal/planproto package, which contains the ugly stubs generated
// by the protobuf compiler.
// ---------------------------------------------------------------------------
// readTfplan reads a protobuf-encoded description from the plan portion of
// a plan file, which is stored in a special file in the archive called
// "tfplan".
func readTfplan(r io.Reader) (*plans.Plan, error) {
src, err := ioutil.ReadAll(r)
if err != nil {
return nil, err
}
var rawPlan planproto.Plan
err = proto.Unmarshal(src, &rawPlan)
if err != nil {
return nil, fmt.Errorf("parse error: %s", err)
}
if rawPlan.Version != tfplanFormatVersion {
return nil, fmt.Errorf("unsupported plan file format version %d; only version %d is supported", rawPlan.Version, tfplanFormatVersion)
}
if rawPlan.TerraformVersion != version.String() {
return nil, fmt.Errorf("plan file was created by Terraform %s, but this is %s; plan files cannot be transferred between different Terraform versions", rawPlan.TerraformVersion, version.String())
}
plan := &plans.Plan{
VariableValues: map[string]plans.DynamicValue{},
Changes: &plans.Changes{
RootOutputs: map[string]*plans.OutputChange{},
Resources: []*plans.ResourceInstanceChange{},
},
ProviderSHA256s: map[string][]byte{},
}
for _, rawOC := range rawPlan.OutputChanges {
name := rawOC.Name
change, err := changeFromTfplan(rawOC.Change)
if err != nil {
return nil, fmt.Errorf("invalid plan for output %q: %s", name, err)
}
plan.Changes.RootOutputs[name] = &plans.OutputChange{
Change: *change,
Sensitive: rawOC.Sensitive,
}
}
for _, rawRC := range rawPlan.ResourceChanges {
change, err := resourceChangeFromTfplan(rawRC)
if err != nil {
// errors from resourceChangeFromTfplan already include context
return nil, err
}
plan.Changes.Resources = append(plan.Changes.Resources, change)
}
for name, rawHashObj := range rawPlan.ProviderHashes {
if len(rawHashObj.Sha256) == 0 {
return nil, fmt.Errorf("no SHA256 hash for provider %q plugin", name)
}
plan.ProviderSHA256s[name] = rawHashObj.Sha256
}
for name, rawVal := range rawPlan.Variables {
val, err := valueFromTfplan(rawVal)
if err != nil {
return nil, fmt.Errorf("invalid value for input variable %q: %s", name, err)
}
plan.VariableValues[name] = val
}
return plan, nil
}
func resourceChangeFromTfplan(rawChange *planproto.ResourceInstanceChange) (*plans.ResourceInstanceChange, error) {
if rawChange == nil {
// Should never happen in practice, since protobuf can't represent
// a nil value in a list.
return nil, fmt.Errorf("resource change object is absent")
}
ret := &plans.ResourceInstanceChange{}
moduleAddr := addrs.RootModuleInstance
if rawChange.ModulePath != "" {
var diags tfdiags.Diagnostics
moduleAddr, diags = addrs.ParseModuleInstanceStr(rawChange.ModulePath)
if diags.HasErrors() {
return nil, diags.Err()
}
}
var mode addrs.ResourceMode
switch rawChange.Mode {
case planproto.ResourceInstanceChange_managed:
mode = addrs.ManagedResourceMode
case planproto.ResourceInstanceChange_data:
mode = addrs.DataResourceMode
default:
return nil, fmt.Errorf("resource has invalid mode %s", rawChange.Mode)
}
typeName := rawChange.Type
name := rawChange.Name
resAddr := addrs.Resource{
Mode: mode,
Type: typeName,
Name: name,
}
var instKey addrs.InstanceKey
switch rawTk := rawChange.InstanceKey.(type) {
case *planproto.ResourceInstanceChange_Int:
instKey = addrs.IntKey(rawTk.Int)
case *planproto.ResourceInstanceChange_Str:
instKey = addrs.StringKey(rawTk.Str)
default:
return nil, fmt.Errorf("instance of %s has invalid key type %T", resAddr.Absolute(moduleAddr), rawChange.InstanceKey)
}
ret.Addr = resAddr.Instance(instKey).Absolute(moduleAddr)
if rawChange.DeposedKey != "" {
if len(rawChange.DeposedKey) != 8 {
return nil, fmt.Errorf("deposed object for %s has invalid deposed key %q", ret.Addr, rawChange.DeposedKey)
}
ret.DeposedKey = states.DeposedKey(rawChange.DeposedKey)
}
change, err := changeFromTfplan(rawChange.Change)
if err != nil {
return nil, fmt.Errorf("invalid plan for resource %s: %s", ret.Addr, err)
}
ret.Change = *change
return ret, nil
}
func changeFromTfplan(rawChange *planproto.Change) (*plans.Change, error) {
if rawChange == nil {
return nil, fmt.Errorf("change object is absent")
}
ret := &plans.Change{}
// -1 indicates that there is no index. We'll customize these below
// depending on the change action, and then decode.
beforeIdx, afterIdx := -1, -1
switch rawChange.Action {
case planproto.Action_NOOP:
ret.Action = plans.NoOp
beforeIdx = 0
afterIdx = 0
case planproto.Action_CREATE:
ret.Action = plans.Create
afterIdx = 0
case planproto.Action_READ:
ret.Action = plans.Read
beforeIdx = 0
afterIdx = 1
case planproto.Action_UPDATE:
ret.Action = plans.Update
beforeIdx = 0
afterIdx = 1
case planproto.Action_REPLACE:
ret.Action = plans.Replace
beforeIdx = 0
afterIdx = 1
case planproto.Action_DELETE:
ret.Action = plans.Delete
beforeIdx = 0
default:
return nil, fmt.Errorf("invalid change action %s", rawChange.Action)
}
if beforeIdx != -1 {
if l := len(rawChange.Values); l <= beforeIdx {
return nil, fmt.Errorf("incorrect number of values (%d) for %s change", l, rawChange.Action)
}
var err error
ret.Before, err = valueFromTfplan(rawChange.Values[beforeIdx])
if err != nil {
return nil, fmt.Errorf("invalid \"before\" value: %s", err)
}
if ret.Before == nil {
return nil, fmt.Errorf("missing \"before\" value: %s", err)
}
}
if afterIdx != -1 {
if l := len(rawChange.Values); l <= afterIdx {
return nil, fmt.Errorf("incorrect number of values (%d) for %s change", l, rawChange.Action)
}
var err error
ret.After, err = valueFromTfplan(rawChange.Values[afterIdx])
if err != nil {
return nil, fmt.Errorf("invalid \"after\" value: %s", err)
}
if ret.After == nil {
return nil, fmt.Errorf("missing \"after\" value: %s", err)
}
}
return ret, nil
}
func valueFromTfplan(rawV *planproto.DynamicValue) (plans.DynamicValue, error) {
if len(rawV.Msgpack) == 0 { // len(0) because that's the default value for a "bytes" in protobuf
return nil, fmt.Errorf("dynamic value does not have msgpack serialization")
}
return plans.DynamicValue(rawV.Msgpack), nil
}
// writeTfplan serializes the given plan into the protobuf-based format used
// for the "tfplan" portion of a plan file.
func writeTfplan(plan *plans.Plan, w io.Writer) error {
rawPlan := &planproto.Plan{
Version: tfplanFormatVersion,
TerraformVersion: version.String(),
ProviderHashes: map[string]*planproto.Hash{},
Variables: map[string]*planproto.DynamicValue{},
OutputChanges: []*planproto.OutputChange{},
ResourceChanges: []*planproto.ResourceInstanceChange{},
}
for name, oc := range plan.Changes.RootOutputs {
// Writing outputs as cty.DynamicPseudoType forces the stored values
// to also contain dynamic type information, so we can recover the
// original type when we read the values back in readTFPlan.
protoChange, err := changeToTfplan(&oc.Change)
if err != nil {
return fmt.Errorf("cannot write output value %q: %s", name, err)
}
rawPlan.OutputChanges = append(rawPlan.OutputChanges, &planproto.OutputChange{
Name: name,
Change: protoChange,
Sensitive: oc.Sensitive,
})
}
for _, rc := range plan.Changes.Resources {
rawRC, err := resourceChangeToTfplan(rc)
if err != nil {
return err
}
rawPlan.ResourceChanges = append(rawPlan.ResourceChanges, rawRC)
}
for name, hash := range plan.ProviderSHA256s {
rawPlan.ProviderHashes[name] = &planproto.Hash{
Sha256: hash,
}
}
for name, val := range plan.VariableValues {
rawPlan.Variables[name] = valueToTfplan(val)
}
src, err := proto.Marshal(rawPlan)
if err != nil {
return fmt.Errorf("serialization error: %s", err)
}
_, err = w.Write(src)
if err != nil {
return fmt.Errorf("failed to write plan to plan file: %s", err)
}
return nil
}
func resourceChangeToTfplan(change *plans.ResourceInstanceChange) (*planproto.ResourceInstanceChange, error) {
ret := &planproto.ResourceInstanceChange{}
ret.ModulePath = change.Addr.Module.String()
relAddr := change.Addr.Resource
switch relAddr.Resource.Mode {
case addrs.ManagedResourceMode:
ret.Mode = planproto.ResourceInstanceChange_managed
case addrs.DataResourceMode:
ret.Mode = planproto.ResourceInstanceChange_data
default:
return nil, fmt.Errorf("resource %s has unsupported mode %s", relAddr, relAddr.Resource.Mode)
}
ret.Type = relAddr.Resource.Type
ret.Name = relAddr.Resource.Name
switch tk := relAddr.Key.(type) {
case addrs.IntKey:
ret.InstanceKey = &planproto.ResourceInstanceChange_Int{
Int: int64(tk),
}
case addrs.StringKey:
ret.InstanceKey = &planproto.ResourceInstanceChange_Str{
Str: string(tk),
}
default:
return nil, fmt.Errorf("resource %s has unsupported instance key type %T", relAddr, relAddr.Key)
}
ret.DeposedKey = string(change.DeposedKey)
valChange, err := changeToTfplan(&change.Change)
if err != nil {
return nil, fmt.Errorf("failed to serialize resource %s change: %s", relAddr, err)
}
ret.Change = valChange
return ret, nil
}
func changeToTfplan(change *plans.Change) (*planproto.Change, error) {
ret := &planproto.Change{}
before := valueToTfplan(change.Before)
after := valueToTfplan(change.After)
switch change.Action {
case plans.NoOp:
ret.Action = planproto.Action_NOOP
ret.Values = []*planproto.DynamicValue{before} // before and after should be identical
case plans.Create:
ret.Action = planproto.Action_CREATE
ret.Values = []*planproto.DynamicValue{after}
case plans.Read:
ret.Action = planproto.Action_READ
ret.Values = []*planproto.DynamicValue{before, after}
case plans.Update:
ret.Action = planproto.Action_UPDATE
ret.Values = []*planproto.DynamicValue{before, after}
case plans.Replace:
ret.Action = planproto.Action_REPLACE
ret.Values = []*planproto.DynamicValue{before, after}
case plans.Delete:
ret.Action = planproto.Action_DELETE
ret.Values = []*planproto.DynamicValue{before}
default:
return nil, fmt.Errorf("invalid change action %s", change.Action)
}
return ret, nil
}
func valueToTfplan(val plans.DynamicValue) *planproto.DynamicValue {
if val == nil {
// protobuf can't represent nil, so we'll represent it as a
// DynamicValue that has no serializations at all.
return &planproto.DynamicValue{}
}
return &planproto.DynamicValue{
Msgpack: []byte(val),
}
}

133
plans/planfile/tfplan_test.go Normal file
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package planfile
import (
"bytes"
"testing"
"github.com/go-test/deep"
"github.com/zclconf/go-cty/cty"
"github.com/hashicorp/terraform/addrs"
"github.com/hashicorp/terraform/plans"
)
func TestTFPlanRoundTrip(t *testing.T) {
objTy := cty.Object(map[string]cty.Type{
"id": cty.String,
})
plan := &plans.Plan{
VariableValues: map[string]plans.DynamicValue{
"foo": mustNewDynamicValueStr("foo value"),
},
Changes: &plans.Changes{
RootOutputs: map[string]*plans.OutputChange{
"bar": {
Change: plans.Change{
Action: plans.Create,
After: mustNewDynamicValueStr("bar value"),
},
Sensitive: false,
},
"baz": {
Change: plans.Change{
Action: plans.NoOp,
Before: mustNewDynamicValueStr("baz value"),
After: mustNewDynamicValueStr("baz value"),
},
Sensitive: false,
},
"secret": {
Change: plans.Change{
Action: plans.Update,
Before: mustNewDynamicValueStr("old secret value"),
After: mustNewDynamicValueStr("new secret value"),
},
Sensitive: true,
},
},
Resources: []*plans.ResourceInstanceChange{
{
Addr: addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_thing",
Name: "woot",
}.Instance(addrs.IntKey(0)).Absolute(addrs.RootModuleInstance),
Change: plans.Change{
Action: plans.Replace,
Before: mustNewDynamicValue(cty.ObjectVal(map[string]cty.Value{
"id": cty.StringVal("foo-bar-baz"),
}), objTy),
After: mustNewDynamicValue(cty.ObjectVal(map[string]cty.Value{
"id": cty.UnknownVal(cty.String),
}), objTy),
},
},
{
Addr: addrs.Resource{
Mode: addrs.ManagedResourceMode,
Type: "test_thing",
Name: "woot",
}.Instance(addrs.IntKey(0)).Absolute(addrs.RootModuleInstance),
DeposedKey: "foodface",
Change: plans.Change{
Action: plans.Delete,
Before: mustNewDynamicValue(cty.ObjectVal(map[string]cty.Value{
"id": cty.StringVal("bar-baz-foo"),
}), objTy),
},
},
},
},
ProviderSHA256s: map[string][]byte{
"test": []byte{
0xba, 0x5e, 0x1e, 0x55, 0xb0, 0x1d, 0xfa, 0xce,
0xef, 0xfe, 0xc7, 0xed, 0x1a, 0xbe, 0x11, 0xed,
0x5c, 0xa1, 0xab, 0x1e, 0xda, 0x7a, 0xba, 0x5e,
0x70, 0x7a, 0x11, 0xed, 0xb0, 0x07, 0xab, 0x1e,
},
},
}
var buf bytes.Buffer
err := writeTfplan(plan, &buf)
if err != nil {
t.Fatal(err)
}
newPlan, err := readTfplan(&buf)
if err != nil {
t.Fatal(err)
}
{
oldDepth := deep.MaxDepth
oldCompare := deep.CompareUnexportedFields
deep.MaxDepth = 20
deep.CompareUnexportedFields = true
defer func() {
deep.MaxDepth = oldDepth
deep.CompareUnexportedFields = oldCompare
}()
}
for _, problem := range deep.Equal(newPlan, plan) {
t.Error(problem)
}
}
func mustNewDynamicValue(val cty.Value, ty cty.Type) plans.DynamicValue {
ret, err := plans.NewDynamicValue(val, ty)
if err != nil {
panic(err)
}
return ret
}
func mustNewDynamicValueStr(val string) plans.DynamicValue {
realVal := cty.StringVal(val)
ret, err := plans.NewDynamicValue(realVal, cty.String)
if err != nil {
panic(err)
}
return ret
}

72
plans/planfile/writer.go Normal file
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package planfile
import (
"archive/zip"
"fmt"
"os"
"time"
"github.com/hashicorp/terraform/configs/configload"
"github.com/hashicorp/terraform/plans"
"github.com/hashicorp/terraform/states/statefile"
)
// Create creates a new plan file with the given filename, overwriting any
// file that might already exist there.
//
// A plan file contains both a snapshot of the configuration and of the latest
// state file in addition to the plan itself, so that Terraform can detect
// if the world has changed since the plan was created and thus refuse to
// apply it.
func Create(filename string, configSnap *configload.Snapshot, stateFile *statefile.File, plan *plans.Plan) error {
f, err := os.Create(filename)
if err != nil {
return err
}
defer f.Close()
zw := zip.NewWriter(f)
defer zw.Close()
// tfplan file
{
w, err := zw.CreateHeader(&zip.FileHeader{
Name: tfplanFilename,
Method: zip.Deflate,
Modified: time.Now(),
})
if err != nil {
return fmt.Errorf("failed to create tfplan file: %s", err)
}
err = writeTfplan(plan, w)
if err != nil {
return fmt.Errorf("failed to write plan: %s", err)
}
}
// tfstate file
{
w, err := zw.CreateHeader(&zip.FileHeader{
Name: tfstateFilename,
Method: zip.Deflate,
Modified: time.Now(),
})
if err != nil {
return fmt.Errorf("failed to create embedded tfstate file: %s", err)
}
err = statefile.Write(stateFile, w)
if err != nil {
return fmt.Errorf("failed to write state snapshot: %s", err)
}
}
// tfconfig directory
{
err := writeConfigSnapshot(configSnap, zw)
if err != nil {
return fmt.Errorf("failed to write config snapshot: %s", err)
}
}
return nil
}