Simplify time.Duration parsing

common/step_shutdown.go

@@ -12,27 +12,18 @@ import (
 )
 
 type ShutdownConfig struct {
-	Command    string `mapstructure:"shutdown_command"`
-	RawTimeout string `mapstructure:"shutdown_timeout"`
-
-	Timeout time.Duration
+	Command string        `mapstructure:"shutdown_command"`
+	Timeout time.Duration `mapstructure:"shutdown_timeout"`
 }
 
 func (c *ShutdownConfig) Prepare() []error {
 	var errs []error
 
-	if c.RawTimeout != "" {
-		timeout, err := time.ParseDuration(c.RawTimeout)
-		if err != nil {
-			errs = append(errs, fmt.Errorf("Failed parsing shutdown_timeout: %s", err))
-			return errs
-		}
-		c.Timeout = timeout
-	} else {
+	if c.Timeout == 0 {
 		c.Timeout = 5 * time.Minute
 	}
 
-	return nil
+	return errs
 }
 
 type StepShutdown struct {

common/step_wait_for_ip.go

@@ -11,9 +11,7 @@ import (
 )
 
 type WaitIpConfig struct {
-	SettleTimeout string `mapstructure:"ip_settle_timeout"`
-
-	settleTimeout time.Duration
+	SettleTimeout time.Duration `mapstructure:"ip_settle_timeout"`
 }
 
 type StepWaitForIp struct {
@@ -23,14 +21,8 @@ type StepWaitForIp struct {
 func (c *WaitIpConfig) Prepare() []error {
 	var errs []error
 
-	if c.SettleTimeout == "" {
-		c.SettleTimeout = "5s"
-	}
-
-	var err error
-	c.settleTimeout, err = time.ParseDuration(c.SettleTimeout)
-	if err != nil {
-		errs = append(errs, fmt.Errorf("failed parsing ip_settle_timeout: %s", err))
+	if c.SettleTimeout == 0 {
+		c.SettleTimeout = 5 * time.Second
 	}
 
 	return errs
@@ -71,11 +63,11 @@ func doGetIp(vm *driver.VirtualMachine, ctx context.Context, c *WaitIpConfig, er
 	var prevIp = ""
 	var stopTime time.Time
 	var interval time.Duration
-	if c.settleTimeout.Seconds() >= 120 {
+	if c.SettleTimeout.Seconds() >= 120 {
 		interval = 30 * time.Second
-	} else if c.settleTimeout.Seconds() >= 60 {
+	} else if c.SettleTimeout.Seconds() >= 60 {
 		interval = 15 * time.Second
-	} else if c.settleTimeout.Seconds() >= 10 {
+	} else if c.SettleTimeout.Seconds() >= 10 {
 		interval = 5 * time.Second
 	} else {
 		interval = 1 * time.Second
@@ -93,7 +85,7 @@ loop:
 			log.Printf("VM IP changed from %s to %s", prevIp, ip)
 		}
 		prevIp = ip
-		stopTime = time.Now().Add(c.settleTimeout)
+		stopTime = time.Now().Add(c.SettleTimeout)
 		goto loop
 	} else {
 		log.Printf("VM IP is still the same: %s", prevIp)

iso/step_boot_command.go

@@ -18,11 +18,9 @@ import (
 )
 
 type BootConfig struct {
-	BootCommand []string `mapstructure:"boot_command"`
-	RawBootWait string   `mapstructure:"boot_wait"` // example: "1m30s"; default: "10s"
-	HTTPIP      string   `mapstructure:"http_ip"`
-
-	bootWait time.Duration
+	BootCommand []string      `mapstructure:"boot_command"`
+	BootWait    time.Duration `mapstructure:"boot_wait"` // example: "1m30s"; default: "10s"
+	HTTPIP      string        `mapstructure:"http_ip"`
 }
 
 type bootCommandTemplateData struct {
@@ -34,14 +32,8 @@ type bootCommandTemplateData struct {
 func (c *BootConfig) Prepare() []error {
 	var errs []error
 
-	if c.RawBootWait == "" {
-		c.RawBootWait = "10s"
-	}
-
-	var err error
-	c.bootWait, err = time.ParseDuration(c.RawBootWait)
-	if err != nil {
-		errs = append(errs, fmt.Errorf("failed parsing boot_wait: %s", err))
+	if c.BootWait == 0 {
+		c.BootWait = 10 * time.Second
 	}
 
 	return errs
@@ -98,8 +90,8 @@ func (s *StepBootCommand) Run(_ context.Context, state multistep.StateBag) multi
 		return multistep.ActionContinue
 	}
 
-	ui.Say(fmt.Sprintf("Waiting %s for boot...", s.Config.bootWait))
-	wait := time.After(s.Config.bootWait)
+	ui.Say(fmt.Sprintf("Waiting %s for boot...", s.Config.BootWait))
+	wait := time.After(s.Config.BootWait)
 WAITLOOP:
 	for {
 		select {