72 lines
1.6 KiB
Go
72 lines
1.6 KiB
Go
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package chroot
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import (
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"bytes"
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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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"os/exec"
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)
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// StepMountDevice mounts the attached device.
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//
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// Produces:
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// mount_path string - The location where the volume was mounted.
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type StepMountDevice struct {
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mountPath string
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}
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func (s *StepMountDevice) Run(state map[string]interface{}) multistep.StepAction {
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config := state["config"].(*Config)
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ui := state["ui"].(packer.Ui)
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device := state["device"].(string)
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mountPath := config.MountPath
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log.Printf("Mount path: %s", mountPath)
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if err := os.MkdirAll(mountPath, 0755); err != nil {
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err := fmt.Errorf("Error creating mount directory: %s", err)
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state["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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ui.Say("Mounting the root device...")
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stderr := new(bytes.Buffer)
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cmd := exec.Command("mount", device, mountPath)
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cmd.Stderr = stderr
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if err := cmd.Run(); err != nil {
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err := fmt.Errorf(
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"Error mounting root volume: %s\nStderr: %s", err, stderr.String())
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state["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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return multistep.ActionContinue
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}
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func (s *StepMountDevice) Cleanup(state map[string]interface{}) {
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if s.mountPath == "" {
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return
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}
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ui := state["ui"].(packer.Ui)
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ui.Say("Unmounting the root device...")
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path, err := exec.LookPath("umount")
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if err != nil {
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ui.Error(fmt.Sprintf("Error umounting root device: %s", err))
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return
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}
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cmd := exec.Command(path, s.mountPath)
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if err := cmd.Run(); err != nil {
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ui.Error(fmt.Sprintf(
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"Error unmounting root device: %s", err))
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return
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}
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}
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