46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
package chroot
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import (
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"fmt"
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"github.com/mitchellh/multistep"
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"github.com/mitchellh/packer/packer"
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"log"
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"os"
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)
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// StepPrepareDevice finds an available device and sets it.
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type StepPrepareDevice struct {
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mounts []string
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}
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func (s *StepPrepareDevice) Run(state multistep.StateBag) multistep.StepAction {
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config := state.Get("config").(*Config)
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ui := state.Get("ui").(packer.Ui)
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device := config.DevicePath
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if device == "" {
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var err error
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log.Println("Device path not specified, searching for available device...")
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device, err = AvailableDevice()
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if err != nil {
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err := fmt.Errorf("Error finding available device: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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}
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if _, err := os.Stat(device); err == nil {
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err := fmt.Errorf("Device is in use: %s", device)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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log.Printf("Device: %s", device)
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state.Put("device", device)
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return multistep.ActionContinue
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}
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func (s *StepPrepareDevice) Cleanup(state multistep.StateBag) {}
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