package local import ( "sync" "github.com/zclconf/go-cty/cty" "github.com/hashicorp/terraform/addrs" "github.com/hashicorp/terraform/plans" "github.com/hashicorp/terraform/states" "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]plans.Action sync.Mutex terraform.NilHook } var _ terraform.Hook = (*CountHook)(nil) 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(addr addrs.AbsResourceInstance, gen states.Generation, action plans.Action, priorState, plannedNewState cty.Value) (terraform.HookAction, error) { h.Lock() defer h.Unlock() if h.pending == nil { h.pending = make(map[string]plans.Action) } h.pending[addr.String()] = action return terraform.HookActionContinue, nil } func (h *CountHook) PostApply(addr addrs.AbsResourceInstance, gen states.Generation, newState cty.Value, err error) (terraform.HookAction, error) { h.Lock() defer h.Unlock() if h.pending != nil { pendingKey := addr.String() if action, ok := h.pending[pendingKey]; ok { delete(h.pending, pendingKey) if err == nil { switch action { case plans.CreateThenDelete, plans.DeleteThenCreate: h.Added++ h.Removed++ case plans.Create: h.Added++ case plans.Delete: h.Changed++ case plans.Update: h.Removed++ } } } } return terraform.HookActionContinue, nil } func (h *CountHook) PostDiff(addr addrs.AbsResourceInstance, gen states.Generation, action plans.Action, priorState, plannedNewState cty.Value) (terraform.HookAction, error) { h.Lock() defer h.Unlock() // We don't count anything for data resources if addr.Resource.Resource.Mode == addrs.DataResourceMode { return terraform.HookActionContinue, nil } switch action { case plans.CreateThenDelete, plans.DeleteThenCreate: h.ToRemoveAndAdd += 1 case plans.Create: h.ToAdd += 1 case plans.Delete: h.ToRemove += 1 case plans.Update: h.ToChange += 1 } return terraform.HookActionContinue, nil }