172 lines
7.5 KiB
Go
172 lines
7.5 KiB
Go
package terraform
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import (
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"github.com/hashicorp/hcl/v2"
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"github.com/hashicorp/terraform/addrs"
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"github.com/hashicorp/terraform/configs/configschema"
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"github.com/hashicorp/terraform/instances"
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"github.com/hashicorp/terraform/lang"
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"github.com/hashicorp/terraform/plans"
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"github.com/hashicorp/terraform/providers"
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"github.com/hashicorp/terraform/provisioners"
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"github.com/hashicorp/terraform/states"
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"github.com/hashicorp/terraform/tfdiags"
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"github.com/zclconf/go-cty/cty"
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)
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// EvalContext is the interface that is given to eval nodes to execute.
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type EvalContext interface {
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// Stopped returns a channel that is closed when evaluation is stopped
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// via Terraform.Context.Stop()
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Stopped() <-chan struct{}
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// Path is the current module path.
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Path() addrs.ModuleInstance
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// Hook is used to call hook methods. The callback is called for each
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// hook and should return the hook action to take and the error.
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Hook(func(Hook) (HookAction, error)) error
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// Input is the UIInput object for interacting with the UI.
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Input() UIInput
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// InitProvider initializes the provider with the given address, and returns
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// the implementation of the resource provider or an error.
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//
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// It is an error to initialize the same provider more than once. This
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// method will panic if the module instance address of the given provider
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// configuration does not match the Path() of the EvalContext.
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InitProvider(addr addrs.AbsProviderConfig) (providers.Interface, error)
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// Provider gets the provider instance with the given address (already
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// initialized) or returns nil if the provider isn't initialized.
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//
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// This method expects an _absolute_ provider configuration address, since
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// resources in one module are able to use providers from other modules.
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// InitProvider must've been called on the EvalContext of the module
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// that owns the given provider before calling this method.
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Provider(addrs.AbsProviderConfig) providers.Interface
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// ProviderSchema retrieves the schema for a particular provider, which
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// must have already been initialized with InitProvider.
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//
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// This method expects an _absolute_ provider configuration address, since
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// resources in one module are able to use providers from other modules.
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ProviderSchema(addrs.AbsProviderConfig) *ProviderSchema
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// CloseProvider closes provider connections that aren't needed anymore.
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//
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// This method will panic if the module instance address of the given
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// provider configuration does not match the Path() of the EvalContext.
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CloseProvider(addrs.AbsProviderConfig) error
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// ConfigureProvider configures the provider with the given
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// configuration. This is a separate context call because this call
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// is used to store the provider configuration for inheritance lookups
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// with ParentProviderConfig().
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//
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// This method will panic if the module instance address of the given
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// provider configuration does not match the Path() of the EvalContext.
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ConfigureProvider(addrs.AbsProviderConfig, cty.Value) tfdiags.Diagnostics
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// ProviderInput and SetProviderInput are used to configure providers
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// from user input.
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//
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// These methods will panic if the module instance address of the given
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// provider configuration does not match the Path() of the EvalContext.
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ProviderInput(addrs.AbsProviderConfig) map[string]cty.Value
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SetProviderInput(addrs.AbsProviderConfig, map[string]cty.Value)
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// InitProvisioner initializes the provisioner with the given name.
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// It is an error to initialize the same provisioner more than once.
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InitProvisioner(string) error
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// Provisioner gets the provisioner instance with the given name (already
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// initialized) or returns nil if the provisioner isn't initialized.
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Provisioner(string) provisioners.Interface
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// ProvisionerSchema retrieves the main configuration schema for a
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// particular provisioner, which must have already been initialized with
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// InitProvisioner.
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ProvisionerSchema(string) *configschema.Block
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// CloseProvisioner closes provisioner connections that aren't needed
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// anymore.
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CloseProvisioner(string) error
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// EvaluateBlock takes the given raw configuration block and associated
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// schema and evaluates it to produce a value of an object type that
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// conforms to the implied type of the schema.
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//
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// The "self" argument is optional. If given, it is the referenceable
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// address that the name "self" should behave as an alias for when
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// evaluating. Set this to nil if the "self" object should not be available.
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//
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// The "key" argument is also optional. If given, it is the instance key
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// of the current object within the multi-instance container it belongs
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// to. For example, on a resource block with "count" set this should be
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// set to a different addrs.IntKey for each instance created from that
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// block. Set this to addrs.NoKey if not appropriate.
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//
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// The returned body is an expanded version of the given body, with any
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// "dynamic" blocks replaced with zero or more static blocks. This can be
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// used to extract correct source location information about attributes of
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// the returned object value.
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EvaluateBlock(body hcl.Body, schema *configschema.Block, self addrs.Referenceable, keyData InstanceKeyEvalData) (cty.Value, hcl.Body, tfdiags.Diagnostics)
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// EvaluateExpr takes the given HCL expression and evaluates it to produce
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// a value.
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//
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// The "self" argument is optional. If given, it is the referenceable
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// address that the name "self" should behave as an alias for when
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// evaluating. Set this to nil if the "self" object should not be available.
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EvaluateExpr(expr hcl.Expression, wantType cty.Type, self addrs.Referenceable) (cty.Value, tfdiags.Diagnostics)
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// EvaluationScope returns a scope that can be used to evaluate reference
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// addresses in this context.
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EvaluationScope(self addrs.Referenceable, keyData InstanceKeyEvalData) *lang.Scope
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// SetModuleCallArguments defines values for the variables of a particular
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// child module call.
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//
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// Calling this function multiple times has merging behavior, keeping any
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// previously-set keys that are not present in the new map.
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SetModuleCallArguments(addrs.ModuleCallInstance, map[string]cty.Value)
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// GetVariableValue returns the value provided for the input variable with
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// the given address, or cty.DynamicVal if the variable hasn't been assigned
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// a value yet.
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//
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// Most callers should deal with variable values only indirectly via
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// EvaluationScope and the other expression evaluation functions, but
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// this is provided because variables tend to be evaluated outside of
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// the context of the module they belong to and so we sometimes need to
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// override the normal expression evaluation behavior.
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GetVariableValue(addr addrs.AbsInputVariableInstance) cty.Value
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// Changes returns the writer object that can be used to write new proposed
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// changes into the global changes set.
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Changes() *plans.ChangesSync
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// State returns a wrapper object that provides safe concurrent access to
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// the global state.
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State() *states.SyncState
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// RefreshState returns a wrapper object that provides safe concurrent
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// access to the state used to store the most recently refreshed resource
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// values.
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RefreshState() *states.SyncState
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// InstanceExpander returns a helper object for tracking the expansion of
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// graph nodes during the plan phase in response to "count" and "for_each"
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// arguments.
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//
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// The InstanceExpander is a global object that is shared across all of the
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// EvalContext objects for a given configuration.
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InstanceExpander() *instances.Expander
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// WithPath returns a copy of the context with the internal path set to the
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// path argument.
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WithPath(path addrs.ModuleInstance) EvalContext
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}
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