func (h *UiHook) PreApply(
n *terraform.InstanceInfo,
s *terraform.InstanceState,
d *terraform.InstanceDiff) (terraform.HookAction, error) {
h.once.Do(h.init)
id := n.HumanId()
op := uiResourceModify
if d.Destroy {
op = uiResourceDestroy
} else if s.ID == "" {
op = uiResourceCreate
}
h.l.Lock()
h.resources[id] = uiResourceState{
Op: op,
Start: time.Now().Round(time.Second),
}
h.l.Unlock()
var operation string
switch op {
case uiResourceModify:
operation = "Modifying..."
case uiResourceDestroy:
operation = "Destroying..."
case uiResourceCreate:
operation = "Creating..."
case uiResourceUnknown:
return terraform.HookActionContinue, nil
}
attrBuf := new(bytes.Buffer)
// Get all the attributes that are changing, and sort them. Also
// determine the longest key so that we can align them all.
keyLen := 0
dAttrs := d.CopyAttributes()
keys := make([]string, 0, len(dAttrs))
for key, _ := range dAttrs {
// Skip the ID since we do that specially
if key == "id" {
continue
}
keys = append(keys, key)
if len(key) > keyLen {
keyLen = len(key)
}
}
sort.Strings(keys)
// Go through and output each attribute
for _, attrK := range keys {
attrDiff, _ := d.GetAttribute(attrK)
v := attrDiff.New
u := attrDiff.Old
if attrDiff.NewComputed {
v = "<computed>"
}
if attrDiff.Sensitive {
u = "<sensitive>"
v = "<sensitive>"
}
attrBuf.WriteString(fmt.Sprintf(
" %s:%s %#v => %#v\n",
attrK,
strings.Repeat(" ", keyLen-len(attrK)),
u,
v))
}
attrString := strings.TrimSpace(attrBuf.String())
if attrString != "" {
attrString = "\n " + attrString
}
h.ui.Output(h.Colorize.Color(fmt.Sprintf(
"[reset][bold]%s: %s[reset_bold]%s",
id,
operation,
attrString)))
// Set a timer to show an operation is still happening
time.AfterFunc(periodicUiTimer, func() { h.stillApplying(id) })
return terraform.HookActionContinue, nil
}
