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Published: Aug 26, 2020 License: MPL-2.0 Imports: 37 Imported by: 0



The config package is responsible for loading and validating the configuration.



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var NameRegexp = regexp.MustCompile(`(?i)\A[A-Z0-9_][A-Z0-9\-\_]*\z`)

NameRegexp is the regular expression that all names (modules, providers, resources, etc.) must follow.

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var ReservedDataSourceFields = []string{
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var ReservedProviderFields = []string{
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var ReservedResourceFields = []string{


func IsIgnoredFile added in v0.10.0

func IsIgnoredFile(name string) bool

IsIgnoredFile returns true or false depending on whether the provided file name is a file that should be ignored.

func ProviderConfigName

func ProviderConfigName(t string, pcs []*ProviderConfig) string

ProviderConfigName returns the name of the provider configuration in the given mapping that maps to the proper provider configuration for this resource.


type AtlasConfig added in v0.4.0

type AtlasConfig struct {
	Name    string
	Include []string
	Exclude []string

AtlasConfig is the configuration for building in HashiCorp's Atlas.

type Backend added in v0.9.0

type Backend struct {
	Type      string
	RawConfig *RawConfig

	// Hash is a unique hash code representing the original configuration
	// of the backend. This won't be recomputed unless Rehash is called.
	Hash uint64

Backend is the configuration for the "backend" to use with Terraform. A backend is responsible for all major behavior of Terraform's core. The abstraction layer above the core (the "backend") allows for behavior such as remote operation.

func (*Backend) Rehash added in v0.9.0

func (b *Backend) Rehash() uint64

Rehash returns a unique content hash for this backend's configuration as a uint64 value.

func (*Backend) Validate added in v0.9.0

func (b *Backend) Validate() []error

type Config

type Config struct {
	// Dir is the path to the directory where this configuration was
	// loaded from. If it is blank, this configuration wasn't loaded from
	// any meaningful directory.
	Dir string

	Terraform       *Terraform
	Atlas           *AtlasConfig
	Modules         []*Module
	ProviderConfigs []*ProviderConfig
	Resources       []*Resource
	Variables       []*Variable
	Locals          []*Local
	Outputs         []*Output
	// contains filtered or unexported fields

Config is the configuration that comes from loading a collection of Terraform templates.

func Append

func Append(c1, c2 *Config) (*Config, error)

Append appends one configuration to another.

Append assumes that both configurations will not have conflicting variables, resources, etc. If they do, the problems will be caught in the validation phase.

It is possible that c1, c2 on their own are not valid. For example, a resource in c2 may reference a variable in c1. But together, they would be valid.

func LoadDir

func LoadDir(root string) (*Config, error)

LoadDir loads all the Terraform configuration files in a single directory and appends them together.

Special files known as "override files" can also be present, which are merged into the loaded configuration. That is, the non-override files are loaded first to create the configuration. Then, the overrides are merged into the configuration to create the final configuration.

Files are loaded in lexical order.

func LoadFile added in v0.6.0

func LoadFile(path string) (*Config, error)

LoadFile loads the Terraform configuration from a given file.

This file can be any format that Terraform recognizes, and import any other format that Terraform recognizes.

func LoadJSON added in v0.6.0

func LoadJSON(raw json.RawMessage) (*Config, error)

LoadJSON loads a single Terraform configuration from a given JSON document.

The document must be a complete Terraform configuration. This function will NOT try to load any additional modules so only the given document is loaded.

func Merge

func Merge(c1, c2 *Config) (*Config, error)

Merge merges two configurations into a single configuration.

Merge allows for the two configurations to have duplicate resources, because the resources will be merged. This differs from a single Config which must only have unique resources.

func (*Config) InterpolatedVariables added in v0.3.0

func (c *Config) InterpolatedVariables() map[string][]InterpolatedVariable

InterpolatedVariables is a helper that returns a mapping of all the interpolated variables within the configuration. This is used to verify references are valid in the Validate step.

func (*Config) ProviderConfigsByFullName added in v0.10.0

func (c *Config) ProviderConfigsByFullName() map[string]*ProviderConfig

ProviderConfigsByFullName returns a map from provider full names (as returned by ProviderConfig.FullName()) to the corresponding provider configs.

This function returns no new information than what's already in c.ProviderConfigs, but returns it in a more convenient shape. If there is more than one provider config with the same full name then the result is undefined, but that is guaranteed not to happen for any config that has passed validation.

func (*Config) TestString added in v0.3.0

func (c *Config) TestString() string

TestString is a Stringer-like function that outputs a string that can be used to easily compare multiple Config structures in unit tests.

This function has no practical use outside of unit tests and debugging.

func (*Config) Validate

func (c *Config) Validate() tfdiags.Diagnostics

Validate does some basic semantic checking of the configuration.

type CountValueType added in v0.3.0

type CountValueType byte

CountValueType is the type of the count variable that is referenced.

const (
	CountValueInvalid CountValueType = iota

type CountVariable added in v0.3.0

type CountVariable struct {
	Type CountValueType
	// contains filtered or unexported fields

CountVariable is a variable for referencing information about the count.

func NewCountVariable added in v0.3.0

func NewCountVariable(key string) (*CountVariable, error)

func (*CountVariable) FullKey added in v0.3.0

func (c *CountVariable) FullKey() string

func (CountVariable) SourceRange added in v0.10.8

func (r CountVariable) SourceRange() tfdiags.SourceRange

type ErrNoConfigsFound added in v0.8.0

type ErrNoConfigsFound struct {
	Dir string

ErrNoConfigsFound is the error returned by LoadDir if no Terraform configuration files were found in the given directory.

func (ErrNoConfigsFound) Error added in v0.8.0

func (e ErrNoConfigsFound) Error() string

type InterpolatedVariable

type InterpolatedVariable interface {
	FullKey() string
	SourceRange() tfdiags.SourceRange

An InterpolatedVariable is a variable reference within an interpolation.

Implementations of this interface represents various sources where variables can come from: user variables, resources, etc.

func DetectVariables added in v0.3.7

func DetectVariables(root ast.Node) ([]InterpolatedVariable, error)

DetectVariables takes an AST root and returns all the interpolated variables that are detected in the AST tree.

func NewInterpolatedVariable

func NewInterpolatedVariable(v string) (InterpolatedVariable, error)

type Local added in v0.10.3

type Local struct {
	Name      string
	RawConfig *RawConfig

Local is a local value defined within the configuration.

type LocalVariable added in v0.10.3

type LocalVariable struct {
	Name string
	// contains filtered or unexported fields

A LocalVariable is a variable that references a local value defined within the current module, via a "locals" block. This looks like "${}".

func NewLocalVariable added in v0.10.3

func NewLocalVariable(key string) (*LocalVariable, error)

func (*LocalVariable) FullKey added in v0.10.3

func (v *LocalVariable) FullKey() string

func (*LocalVariable) GoString added in v0.10.3

func (v *LocalVariable) GoString() string

func (LocalVariable) SourceRange added in v0.10.8

func (r LocalVariable) SourceRange() tfdiags.SourceRange

type Module added in v0.3.0

type Module struct {
	Name      string
	Source    string
	Version   string
	Providers map[string]string
	RawConfig *RawConfig

Module is a module used within a configuration.

This does not represent a module itself, this represents a module call-site within an existing configuration.

func (*Module) Id added in v0.3.0

func (r *Module) Id() string

A unique identifier for this module.

type ModuleVariable added in v0.3.0

type ModuleVariable struct {
	Name  string
	Field string
	// contains filtered or unexported fields

A ModuleVariable is a variable that is referencing the output of a module, such as "${}"

func NewModuleVariable added in v0.3.0

func NewModuleVariable(key string) (*ModuleVariable, error)

func (*ModuleVariable) FullKey added in v0.3.0

func (v *ModuleVariable) FullKey() string

func (*ModuleVariable) GoString added in v0.8.0

func (v *ModuleVariable) GoString() string

func (ModuleVariable) SourceRange added in v0.10.8

func (r ModuleVariable) SourceRange() tfdiags.SourceRange

type Output

type Output struct {
	Name        string
	DependsOn   []string
	Description string
	Sensitive   bool
	RawConfig   *RawConfig

Output is an output defined within the configuration. An output is resulting data that is highlighted by Terraform when finished. An output marked Sensitive will be output in a masked form following application, but will still be available in state.

type PathValueType added in v0.3.0

type PathValueType byte
const (
	PathValueInvalid PathValueType = iota

type PathVariable added in v0.3.0

type PathVariable struct {
	Type PathValueType
	// contains filtered or unexported fields

A PathVariable is a variable that references path information about the module.

func NewPathVariable added in v0.3.0

func NewPathVariable(key string) (*PathVariable, error)

func (*PathVariable) FullKey added in v0.3.0

func (v *PathVariable) FullKey() string

func (PathVariable) SourceRange added in v0.10.8

func (r PathVariable) SourceRange() tfdiags.SourceRange

type ProviderConfig

type ProviderConfig struct {
	Name      string
	Alias     string
	Version   string
	RawConfig *RawConfig

ProviderConfig is the configuration for a resource provider.

For example, Terraform needs to set the AWS access keys for the AWS resource provider.

func (*ProviderConfig) FullName added in v0.5.0

func (c *ProviderConfig) FullName() string

func (*ProviderConfig) GoString added in v0.6.0

func (c *ProviderConfig) GoString() string

type ProviderVersionConstraint added in v0.10.0

type ProviderVersionConstraint struct {
	Constraint   string
	ProviderType string

ProviderVersionConstraint presents a constraint for a particular provider, identified by its full name.

type ProviderVersionConstraints added in v0.10.0

type ProviderVersionConstraints map[string]ProviderVersionConstraint

ProviderVersionConstraints is a map from provider full name to its associated ProviderVersionConstraint, as produced by Config.RequiredProviders.

func (ProviderVersionConstraints) RequiredRanges added in v0.10.0

func (cons ProviderVersionConstraints) RequiredRanges() map[string]semver.Range

RequiredRanges returns a semver.Range for each distinct provider type in the constraint map. If the same provider type appears more than once (e.g. because aliases are in use) then their respective constraints are combined such that they must *all* apply.

The result of this method can be passed to the PluginMetaSet.ConstrainVersions method within the plugin/discovery package in order to filter down the available plugins to those which satisfy the given constraints.

This function will panic if any of the constraints within cannot be parsed as semver ranges. This is guaranteed to never happen for a constraint set that was built from a configuration that passed validation.

type Provisioner

type Provisioner struct {
	Type      string
	RawConfig *RawConfig
	ConnInfo  *RawConfig

	When      ProvisionerWhen
	OnFailure ProvisionerOnFailure

Provisioner is a configured provisioner step on a resource.

func (*Provisioner) Copy added in v0.6.12

func (p *Provisioner) Copy() *Provisioner

Copy returns a copy of this Provisioner

type ProvisionerOnFailure added in v0.9.0

type ProvisionerOnFailure int

ProvisionerOnFailure is an enum for valid values for on_failure options for provisioners.

const (
	ProvisionerOnFailureInvalid ProvisionerOnFailure = iota

func (ProvisionerOnFailure) String added in v0.9.0

func (v ProvisionerOnFailure) String() string

type ProvisionerWhen added in v0.9.0

type ProvisionerWhen int

ProvisionerWhen is an enum for valid values for when to run provisioners.

const (
	ProvisionerWhenInvalid ProvisionerWhen = iota

func (ProvisionerWhen) String added in v0.9.0

func (v ProvisionerWhen) String() string

type RawConfig

type RawConfig struct {
	Key string

	Raw  map[string]interface{}
	Body hcl2.Body

	Interpolations []ast.Node
	Variables      map[string]InterpolatedVariable
	// contains filtered or unexported fields

RawConfig is a structure that holds a piece of configuration where the overall structure is unknown since it will be used to configure a plugin or some other similar external component.

RawConfigs can be interpolated with variables that come from other resources, user variables, etc.

RawConfig supports a query-like interface to request information from deep within the structure.

func NewRawConfig

func NewRawConfig(raw map[string]interface{}) (*RawConfig, error)

NewRawConfig creates a new RawConfig structure and populates the publicly readable struct fields.

func NewRawConfigHCL2 added in v0.10.8

func NewRawConfigHCL2(body hcl2.Body) *RawConfig

NewRawConfigHCL2 creates a new RawConfig that is serving as a capsule to transport a hcl2.Body. In this mode, the publicly-readable struct fields are not populated since all operations should instead be diverted to the HCL2 body.

For a RawConfig object constructed with this function, the only valid use is to later retrieve the Body value and call its own methods. Callers may choose to set and then later handle the Key field, in a manner consistent with how it is handled by the Value method, but the Value method itself must not be used.

This is an experimental codepath to be used only by the HCL2 config loader. Non-experimental parsing should _always_ use NewRawConfig to produce a fully-functional RawConfig object.

func TestRawConfig added in v0.7.8

func TestRawConfig(t *testing.T, c map[string]interface{}) *RawConfig

TestRawConfig is used to create a RawConfig for testing.

func (*RawConfig) Config

func (r *RawConfig) Config() map[string]interface{}

Config returns the entire configuration with the variables interpolated from any call to Interpolate.

If any interpolated variables are unknown (value set to UnknownVariableValue), the first non-container (map, slice, etc.) element will be removed from the config. The keys of unknown variables can be found using the UnknownKeys function.

By pruning out unknown keys from the configuration, the raw structure will always successfully decode into its ultimate structure using something like mapstructure.

func (*RawConfig) Copy added in v0.4.1

func (r *RawConfig) Copy() *RawConfig

Copy returns a copy of this RawConfig, uninterpolated.

func (*RawConfig) GobDecode

func (r *RawConfig) GobDecode(b []byte) error

See GobEncode

func (*RawConfig) GobEncode

func (r *RawConfig) GobEncode() ([]byte, error)

GobEncode is a custom Gob encoder to use so that we only include the raw configuration. Interpolated variables and such are lost and the tree of interpolated variables is recomputed on decode, since it is referentially transparent.

func (*RawConfig) Interpolate

func (r *RawConfig) Interpolate(vs map[string]ast.Variable) error

Interpolate uses the given mapping of variable values and uses those as the values to replace any variables in this raw configuration.

Any prior calls to Interpolate are replaced with this one.

If a variable key is missing, this will panic.

func (*RawConfig) Merge added in v0.4.0

func (r *RawConfig) Merge(other *RawConfig) *RawConfig

Merge merges another RawConfig into this one (overriding any conflicting values in this config) and returns a new config. The original config is not modified.

func (*RawConfig) RawMap added in v0.7.3

func (r *RawConfig) RawMap() map[string]interface{}

RawMap returns a copy of the RawConfig.Raw map.

func (*RawConfig) UnknownKeys

func (r *RawConfig) UnknownKeys() []string

UnknownKeys returns the keys of the configuration that are unknown because they had interpolated variables that must be computed.

func (*RawConfig) Value added in v0.3.0

func (r *RawConfig) Value() interface{}

Value returns the value of the configuration if this configuration has a Key set. If this does not have a Key set, nil will be returned.

type Resource

type Resource struct {
	Mode         ResourceMode // which operations the resource supports
	Name         string
	Type         string
	RawCount     *RawConfig
	RawConfig    *RawConfig
	Provisioners []*Provisioner
	Provider     string
	DependsOn    []string
	Lifecycle    ResourceLifecycle

A resource represents a single Terraform resource in the configuration. A Terraform resource is something that supports some or all of the usual "create, read, update, delete" operations, depending on the given Mode.

func (*Resource) Copy added in v0.6.12

func (r *Resource) Copy() *Resource

Copy returns a copy of this Resource. Helpful for avoiding shared config pointers across multiple pieces of the graph that need to do interpolation.

func (*Resource) Count

func (r *Resource) Count() (int, error)

Count returns the count of this resource.

func (*Resource) Id

func (r *Resource) Id() string

A unique identifier for this resource.

type ResourceLifecycle added in v0.3.0

type ResourceLifecycle struct {
	CreateBeforeDestroy bool     `mapstructure:"create_before_destroy"`
	PreventDestroy      bool     `mapstructure:"prevent_destroy"`
	IgnoreChanges       []string `mapstructure:"ignore_changes"`

ResourceLifecycle is used to store the lifecycle tuning parameters to allow customized behavior

func (*ResourceLifecycle) Copy added in v0.6.12

Copy returns a copy of this ResourceLifecycle

type ResourceMode added in v0.7.0

type ResourceMode int
const (
	ManagedResourceMode ResourceMode = iota

func (ResourceMode) String added in v0.7.0

func (i ResourceMode) String() string

func (ResourceMode) Taintable added in v0.7.0

func (m ResourceMode) Taintable() bool

type ResourceVariable

type ResourceVariable struct {
	Mode  ResourceMode
	Type  string // Resource type, i.e. "aws_instance"
	Name  string // Resource name
	Field string // Resource field

	Multi bool // True if multi-variable:*.id
	Index int  // Index for multi-variable: == 1
	// contains filtered or unexported fields

A ResourceVariable is a variable that is referencing the field of a resource, such as "${}"

func NewResourceVariable

func NewResourceVariable(key string) (*ResourceVariable, error)

func (*ResourceVariable) FullKey

func (v *ResourceVariable) FullKey() string

func (*ResourceVariable) ResourceId

func (v *ResourceVariable) ResourceId() string

func (ResourceVariable) SourceRange added in v0.10.8

func (r ResourceVariable) SourceRange() tfdiags.SourceRange

type SelfVariable added in v0.4.0

type SelfVariable struct {
	Field string
	// contains filtered or unexported fields

SelfVariable is a variable that is referencing the same resource it is running on: "${self.address}"

func NewSelfVariable added in v0.4.0

func NewSelfVariable(key string) (*SelfVariable, error)

func (*SelfVariable) FullKey added in v0.4.0

func (v *SelfVariable) FullKey() string

func (*SelfVariable) GoString added in v0.4.0

func (v *SelfVariable) GoString() string

func (SelfVariable) SourceRange added in v0.10.8

func (r SelfVariable) SourceRange() tfdiags.SourceRange

type SimpleVariable added in v0.6.7

type SimpleVariable struct {
	Key string
	// contains filtered or unexported fields

SimpleVariable is an unprefixed variable, which can show up when users have strings they are passing down to resources that use interpolation internally. The template_file resource is an example of this.

func NewSimpleVariable added in v0.6.7

func NewSimpleVariable(key string) (*SimpleVariable, error)

func (*SimpleVariable) FullKey added in v0.6.7

func (v *SimpleVariable) FullKey() string

func (*SimpleVariable) GoString added in v0.6.7

func (v *SimpleVariable) GoString() string

func (SimpleVariable) SourceRange added in v0.10.8

func (r SimpleVariable) SourceRange() tfdiags.SourceRange

type Terraform added in v0.8.0

type Terraform struct {
	RequiredVersion string   `hcl:"required_version"` // Required Terraform version (constraint)
	Backend         *Backend // See Backend struct docs

Terraform is the Terraform meta-configuration that can be present in configuration files for configuring Terraform itself.

func (*Terraform) Merge added in v0.9.2

func (t *Terraform) Merge(t2 *Terraform)

Merge t with t2. Any conflicting fields are overwritten by t2.

func (*Terraform) Validate added in v0.9.0

func (t *Terraform) Validate() []error

Validate performs the validation for just the Terraform configuration.

type TerraformVariable added in v0.9.0

type TerraformVariable struct {
	Field string
	// contains filtered or unexported fields

TerraformVariable is a "terraform."-prefixed variable used to access metadata about the Terraform run.

func NewTerraformVariable added in v0.9.0

func NewTerraformVariable(key string) (*TerraformVariable, error)

func (*TerraformVariable) FullKey added in v0.9.0

func (v *TerraformVariable) FullKey() string

func (*TerraformVariable) GoString added in v0.9.0

func (v *TerraformVariable) GoString() string

func (TerraformVariable) SourceRange added in v0.10.8

func (r TerraformVariable) SourceRange() tfdiags.SourceRange

type UserVariable

type UserVariable struct {
	Name string
	Elem string
	// contains filtered or unexported fields

A UserVariable is a variable that is referencing a user variable that is inputted from outside the configuration. This looks like "${}"

func NewUserVariable

func NewUserVariable(key string) (*UserVariable, error)

func (*UserVariable) FullKey

func (v *UserVariable) FullKey() string

func (*UserVariable) GoString

func (v *UserVariable) GoString() string

func (UserVariable) SourceRange added in v0.10.8

func (r UserVariable) SourceRange() tfdiags.SourceRange

type Variable

type Variable struct {
	Name         string
	DeclaredType string `mapstructure:"type"`
	Default      interface{}
	Description  string

Variable is a module argument defined within the configuration.

func (*Variable) Merge

func (v *Variable) Merge(v2 *Variable) *Variable

Merge merges two variables to create a new third variable.

func (*Variable) Required

func (v *Variable) Required() bool

Required tests whether a variable is required or not.

func (*Variable) Type

func (v *Variable) Type() VariableType

Type returns the type of variable this is.

func (*Variable) ValidateTypeAndDefault added in v0.6.10

func (v *Variable) ValidateTypeAndDefault() error

ValidateTypeAndDefault ensures that default variable value is compatible with the declared type (if one exists), and that the type is one which is known to Terraform

type VariableType

type VariableType byte

VariableType is the type of value a variable is holding, and returned by the Type() function on variables.

const (
	VariableTypeUnknown VariableType = iota

func (VariableType) Printable added in v0.6.15

func (v VariableType) Printable() string

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