opentofu/backend/local/hook_count.go
Chris Marchesi 5654a676d9 core: Skip diff hooks for stubs on eval altogether
Rather than overloading InstanceDiff with a "Stub" attribute that is
going to be largely meaningless, we are just going to skip
pre/post-diff hooks altogether. This is under the notion that we will
eventually not need to "stub" a diff for scale-out, stateless nodes on
refresh at all, so diff behaviour won't be necessary at that point, so
we should not assume that hooks will run at this stage anyway.

Also as part of this removed the CountHook test that is now failing
because CountHook is out of scope of the new behaviour.
2017-06-24 08:01:17 -07:00

116 lines
2.1 KiB
Go

package local
import (
"strings"
"sync"
"github.com/hashicorp/terraform/terraform"
)
// CountHook is a hook that counts the number of resources
// added, removed, changed during the course of an apply.
type CountHook struct {
Added int
Changed int
Removed int
ToAdd int
ToChange int
ToRemove int
ToRemoveAndAdd int
pending map[string]countHookAction
sync.Mutex
terraform.NilHook
}
func (h *CountHook) Reset() {
h.Lock()
defer h.Unlock()
h.pending = nil
h.Added = 0
h.Changed = 0
h.Removed = 0
}
func (h *CountHook) PreApply(
n *terraform.InstanceInfo,
s *terraform.InstanceState,
d *terraform.InstanceDiff) (terraform.HookAction, error) {
h.Lock()
defer h.Unlock()
if d.Empty() {
return terraform.HookActionContinue, nil
}
if h.pending == nil {
h.pending = make(map[string]countHookAction)
}
action := countHookActionChange
if d.GetDestroy() {
action = countHookActionRemove
} else if s.ID == "" {
action = countHookActionAdd
}
h.pending[n.HumanId()] = action
return terraform.HookActionContinue, nil
}
func (h *CountHook) PostApply(
n *terraform.InstanceInfo,
s *terraform.InstanceState,
e error) (terraform.HookAction, error) {
h.Lock()
defer h.Unlock()
if h.pending != nil {
if a, ok := h.pending[n.HumanId()]; ok {
delete(h.pending, n.HumanId())
if e == nil {
switch a {
case countHookActionAdd:
h.Added += 1
case countHookActionChange:
h.Changed += 1
case countHookActionRemove:
h.Removed += 1
}
}
}
}
return terraform.HookActionContinue, nil
}
func (h *CountHook) PostDiff(
n *terraform.InstanceInfo, d *terraform.InstanceDiff) (
terraform.HookAction, error) {
h.Lock()
defer h.Unlock()
// We don't count anything for data sources
if strings.HasPrefix(n.Id, "data.") {
return terraform.HookActionContinue, nil
}
switch d.ChangeType() {
case terraform.DiffDestroyCreate:
h.ToRemoveAndAdd += 1
case terraform.DiffCreate:
h.ToAdd += 1
case terraform.DiffDestroy:
h.ToRemove += 1
case terraform.DiffUpdate:
h.ToChange += 1
}
return terraform.HookActionContinue, nil
}