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143 lines
3.2 KiB
Go
143 lines
3.2 KiB
Go
package terraform
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import (
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"fmt"
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"github.com/hashicorp/terraform/config"
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"github.com/hashicorp/terraform/dag"
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)
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// GraphNodeVariable is the interface that must be implemented by anything
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// that is a variable.
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type GraphNodeVariable interface {
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VariableName() string
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SetVariableValue(*config.RawConfig)
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}
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// GraphNodeConfigVariable represents a Variable in the config.
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type GraphNodeConfigVariable struct {
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Variable *config.Variable
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// Value, if non-nil, will be used to set the value of the variable
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// during evaluation. If this is nil, evaluation will do nothing.
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Value *config.RawConfig
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depPrefix string
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}
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func (n *GraphNodeConfigVariable) Name() string {
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return fmt.Sprintf("var.%s", n.Variable.Name)
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}
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func (n *GraphNodeConfigVariable) ConfigType() GraphNodeConfigType {
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return GraphNodeConfigTypeVariable
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}
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func (n *GraphNodeConfigVariable) DependableName() []string {
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return []string{n.Name()}
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}
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func (n *GraphNodeConfigVariable) DependentOn() []string {
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// If we don't have any value set, we don't depend on anything
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if n.Value == nil {
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return nil
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}
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// Get what we depend on based on our value
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vars := n.Value.Variables
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result := make([]string, 0, len(vars))
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for _, v := range vars {
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if vn := varNameForVar(v); vn != "" {
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result = append(result, vn)
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}
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}
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return result
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}
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// GraphNodeVariable impl.
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func (n *GraphNodeConfigVariable) VariableName() string {
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return n.Variable.Name
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}
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// GraphNodeVariable impl.
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func (n *GraphNodeConfigVariable) SetVariableValue(v *config.RawConfig) {
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n.Value = v
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}
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// GraphNodeProxy impl.
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func (n *GraphNodeConfigVariable) Proxy() bool {
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return true
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}
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// GraphNodeEvalable impl.
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func (n *GraphNodeConfigVariable) EvalTree() EvalNode {
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// If we have no value, do nothing
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if n.Value == nil {
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return &EvalNoop{}
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}
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// Otherwise, interpolate the value of this variable and set it
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// within the variables mapping.
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var config *ResourceConfig
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variables := make(map[string]string)
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return &EvalSequence{
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Nodes: []EvalNode{
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&EvalInterpolate{
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Config: n.Value,
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Output: &config,
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},
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&EvalVariableBlock{
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Config: &config,
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Variables: variables,
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},
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&EvalSetVariables{
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Variables: variables,
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},
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},
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}
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}
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// GraphNodeFlattenable impl.
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func (n *GraphNodeConfigVariable) Flatten(p []string) (dag.Vertex, error) {
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return &GraphNodeConfigVariableFlat{
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GraphNodeConfigVariable: n,
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PathValue: p,
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}, nil
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}
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type GraphNodeConfigVariableFlat struct {
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*GraphNodeConfigVariable
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PathValue []string
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}
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func (n *GraphNodeConfigVariableFlat) Name() string {
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return fmt.Sprintf(
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"%s.%s", modulePrefixStr(n.PathValue), n.GraphNodeConfigVariable.Name())
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}
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func (n *GraphNodeConfigVariableFlat) DependableName() []string {
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return []string{n.Name()}
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}
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func (n *GraphNodeConfigVariableFlat) DependentOn() []string {
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// We only wrap the dependencies and such if we have a path that is
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// longer than 2 elements (root, child, more). This is because when
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// flattened, variables can point outside the graph.
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prefix := ""
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if len(n.PathValue) <= 2 {
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prefix = modulePrefixStr(n.PathValue[:len(n.PathValue)-1])
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}
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return modulePrefixList(
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n.GraphNodeConfigVariable.DependentOn(),
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prefix)
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}
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func (n *GraphNodeConfigVariableFlat) Path() []string {
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return n.PathValue
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}
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