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package terraform
import (
"fmt"
"github.com/hashicorp/terraform/plans"
"github.com/hashicorp/terraform/providers"
"github.com/hashicorp/terraform/states"
"github.com/hashicorp/terraform/addrs"
"github.com/zclconf/go-cty/cty"
)
// NodePlannableResourceInstance represents a _single_ resource
// instance that is plannable. This means this represents a single
// count index, for example.
type NodePlannableResourceInstance struct {
*NodeAbstractResourceInstance
ForceCreateBeforeDestroy bool
}
var (
_ GraphNodeSubPath = (*NodePlannableResourceInstance)(nil)
_ GraphNodeReferenceable = (*NodePlannableResourceInstance)(nil)
_ GraphNodeReferencer = (*NodePlannableResourceInstance)(nil)
_ GraphNodeResource = (*NodePlannableResourceInstance)(nil)
_ GraphNodeResourceInstance = (*NodePlannableResourceInstance)(nil)
_ GraphNodeAttachResourceConfig = (*NodePlannableResourceInstance)(nil)
_ GraphNodeAttachResourceState = (*NodePlannableResourceInstance)(nil)
_ GraphNodeEvalable = (*NodePlannableResourceInstance)(nil)
)
// GraphNodeEvalable
func (n *NodePlannableResourceInstance) EvalTree() EvalNode {
addr := n.ResourceInstanceAddr()
// Eval info is different depending on what kind of resource this is
switch addr.Resource.Resource.Mode {
case addrs.ManagedResourceMode:
return n.evalTreeManagedResource(addr)
case addrs.DataResourceMode:
return n.evalTreeDataResource(addr)
default:
panic(fmt.Errorf("unsupported resource mode %s", n.Config.Mode))
}
}
func (n *NodePlannableResourceInstance) evalTreeDataResource(addr addrs.AbsResourceInstance) EvalNode {
config := n.Config
var provider providers.Interface
var providerSchema *ProviderSchema
var change *plans.ResourceInstanceChange
var state *states.ResourceInstanceObject
var configVal cty.Value
return &EvalSequence{
Nodes: []EvalNode{
&EvalGetProvider{
Addr: n.ResolvedProvider,
Output: &provider,
Schema: &providerSchema,
},
&EvalReadState{
Addr: addr.Resource,
Provider: &provider,
ProviderSchema: &providerSchema,
Output: &state,
},
// If we already have a non-planned state then we already dealt
// with this during the refresh walk and so we have nothing to do
// here.
&EvalIf{
If: func(ctx EvalContext) (bool, error) {
depChanges := false
// Check and see if any of our dependencies have changes.
changes := ctx.Changes()
for _, d := range n.StateReferences() {
ri, ok := d.(addrs.ResourceInstance)
if !ok {
continue
}
change := changes.GetResourceInstanceChange(ri.Absolute(ctx.Path()), states.CurrentGen)
if change != nil && change.Action != plans.NoOp {
depChanges = true
break
}
}
refreshed := state != nil && state.Status != states.ObjectPlanned
// If there are no dependency changes, and it's not a forced
// read because we there was no Refresh, then we don't need
// to re-read. If any dependencies have changes, it means
// our config may also have changes and we need to Read the
// data source again.
if !depChanges && refreshed {
return false, EvalEarlyExitError{}
}
return true, nil
},
Then: EvalNoop{},
},
&EvalValidateSelfRef{
Addr: addr.Resource,
Config: config.Config,
ProviderSchema: &providerSchema,
},
&EvalReadData{
Addr: addr.Resource,
Config: n.Config,
Dependencies: n.StateReferences(),
Provider: &provider,
ProviderAddr: n.ResolvedProvider,
ProviderSchema: &providerSchema,
ForcePlanRead: true, // _always_ produce a Read change, even if the config seems ready
OutputChange: &change,
OutputValue: &configVal,
OutputState: &state,
},
&EvalWriteState{
Addr: addr.Resource,
ProviderAddr: n.ResolvedProvider,
ProviderSchema: &providerSchema,
State: &state,
},
&EvalWriteDiff{
Addr: addr.Resource,
ProviderSchema: &providerSchema,
Change: &change,
},
},
}
}
func (n *NodePlannableResourceInstance) evalTreeManagedResource(addr addrs.AbsResourceInstance) EvalNode {
config := n.Config
var provider providers.Interface
var providerSchema *ProviderSchema
var change *plans.ResourceInstanceChange
var state *states.ResourceInstanceObject
return &EvalSequence{
Nodes: []EvalNode{
&EvalGetProvider{
Addr: n.ResolvedProvider,
Output: &provider,
Schema: &providerSchema,
},
&EvalReadState{
Addr: addr.Resource,
Provider: &provider,
ProviderSchema: &providerSchema,
Output: &state,
},
&EvalValidateSelfRef{
Addr: addr.Resource,
Config: config.Config,
ProviderSchema: &providerSchema,
},
&EvalDiff{
Addr: addr.Resource,
Config: n.Config,
CreateBeforeDestroy: n.ForceCreateBeforeDestroy,
Provider: &provider,
ProviderAddr: n.ResolvedProvider,
ProviderSchema: &providerSchema,
State: &state,
OutputChange: &change,
OutputState: &state,
},
&EvalCheckPreventDestroy{
Addr: addr.Resource,
Config: n.Config,
Change: &change,
},
&EvalWriteState{
Addr: addr.Resource,
ProviderAddr: n.ResolvedProvider,
State: &state,
ProviderSchema: &providerSchema,
},
&EvalWriteDiff{
Addr: addr.Resource,
ProviderSchema: &providerSchema,
Change: &change,
},
},
}
}
|
