forked from hashicorp/terraform
/
transform_provider_old.go
174 lines (146 loc) · 4.29 KB
/
transform_provider_old.go
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package terraform
import (
"fmt"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/dag"
)
// DisableProviderTransformer "disables" any providers that are only
// depended on by modules.
//
// NOTE: "old" = used by old graph builders, will be removed one day
type DisableProviderTransformerOld struct{}
func (t *DisableProviderTransformerOld) Transform(g *Graph) error {
// Since we're comparing against edges, we need to make sure we connect
g.ConnectDependents()
for _, v := range g.Vertices() {
// We only care about providers
pn, ok := v.(GraphNodeProvider)
if !ok || pn.ProviderName() == "" {
continue
}
// Go through all the up-edges (things that depend on this
// provider) and if any is not a module, then ignore this node.
nonModule := false
for _, sourceRaw := range g.UpEdges(v).List() {
source := sourceRaw.(dag.Vertex)
cn, ok := source.(graphNodeConfig)
if !ok {
nonModule = true
break
}
if cn.ConfigType() != GraphNodeConfigTypeModule {
nonModule = true
break
}
}
if nonModule {
// We found something that depends on this provider that
// isn't a module, so skip it.
continue
}
// Disable the provider by replacing it with a "disabled" provider
disabled := &graphNodeDisabledProvider{GraphNodeProvider: pn}
if !g.Replace(v, disabled) {
panic(fmt.Sprintf(
"vertex disappeared from under us: %s",
dag.VertexName(v)))
}
}
return nil
}
type graphNodeDisabledProvider struct {
GraphNodeProvider
}
// GraphNodeEvalable impl.
func (n *graphNodeDisabledProvider) EvalTree() EvalNode {
var resourceConfig *ResourceConfig
return &EvalOpFilter{
Ops: []walkOperation{walkInput, walkValidate, walkRefresh, walkPlan, walkApply, walkDestroy},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalInterpolate{
Config: n.ProviderConfig(),
Output: &resourceConfig,
},
&EvalBuildProviderConfig{
Provider: n.ProviderName(),
Config: &resourceConfig,
Output: &resourceConfig,
},
&EvalSetProviderConfig{
Provider: n.ProviderName(),
Config: &resourceConfig,
},
},
},
}
}
// GraphNodeFlattenable impl.
func (n *graphNodeDisabledProvider) Flatten(p []string) (dag.Vertex, error) {
return &graphNodeDisabledProviderFlat{
graphNodeDisabledProvider: n,
PathValue: p,
}, nil
}
func (n *graphNodeDisabledProvider) Name() string {
return fmt.Sprintf("%s (disabled)", dag.VertexName(n.GraphNodeProvider))
}
// GraphNodeDotter impl.
func (n *graphNodeDisabledProvider) DotNode(name string, opts *dag.DotOpts) *dag.DotNode {
return &dag.DotNode{
Name: name,
Attrs: map[string]string{
"label": n.Name(),
"shape": "diamond",
},
}
}
// GraphNodeDotterOrigin impl.
func (n *graphNodeDisabledProvider) DotOrigin() bool {
return true
}
// GraphNodeDependable impl.
func (n *graphNodeDisabledProvider) DependableName() []string {
return []string{"provider." + n.ProviderName()}
}
// GraphNodeProvider impl.
func (n *graphNodeDisabledProvider) ProviderName() string {
return n.GraphNodeProvider.ProviderName()
}
// GraphNodeProvider impl.
func (n *graphNodeDisabledProvider) ProviderConfig() *config.RawConfig {
return n.GraphNodeProvider.ProviderConfig()
}
// Same as graphNodeDisabledProvider, but for flattening
type graphNodeDisabledProviderFlat struct {
*graphNodeDisabledProvider
PathValue []string
}
func (n *graphNodeDisabledProviderFlat) Name() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue), n.graphNodeDisabledProvider.Name())
}
func (n *graphNodeDisabledProviderFlat) Path() []string {
return n.PathValue
}
func (n *graphNodeDisabledProviderFlat) ProviderName() string {
return fmt.Sprintf(
"%s.%s", modulePrefixStr(n.PathValue),
n.graphNodeDisabledProvider.ProviderName())
}
// GraphNodeDependable impl.
func (n *graphNodeDisabledProviderFlat) DependableName() []string {
return modulePrefixList(
n.graphNodeDisabledProvider.DependableName(),
modulePrefixStr(n.PathValue))
}
func (n *graphNodeDisabledProviderFlat) DependentOn() []string {
var result []string
// If we're in a module, then depend on our parent's provider
if len(n.PathValue) > 1 {
prefix := modulePrefixStr(n.PathValue[:len(n.PathValue)-1])
result = modulePrefixList(
n.graphNodeDisabledProvider.DependableName(), prefix)
}
return result
}