89 lines
2.1 KiB
Go
89 lines
2.1 KiB
Go
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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"os"
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"os/exec"
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)
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// StepMountExtra 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 StepMountExtra struct {
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mounts []string
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}
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func (s *StepMountExtra) Run(state map[string]interface{}) multistep.StepAction {
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config := state["config"].(*Config)
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mountPath := state["mount_path"].(string)
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ui := state["ui"].(packer.Ui)
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s.mounts = make([]string, 0, len(config.ChrootMounts))
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ui.Say("Mounting additional paths within the chroot...")
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for _, mountInfo := range config.ChrootMounts {
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innerPath := mountPath + mountInfo[2]
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if err := os.MkdirAll(innerPath, 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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flags := "-t " + mountInfo[0]
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if mountInfo[0] == "bind" {
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flags = "--bind"
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}
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ui.Message(fmt.Sprintf("Mounting: %s", mountInfo[2]))
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stderr := new(bytes.Buffer)
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mountCommand := fmt.Sprintf(
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"%s %s %s %s",
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config.MountCommand,
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flags,
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mountInfo[1],
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innerPath)
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cmd := exec.Command("/bin/sh", "-c", mountCommand)
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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: %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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s.mounts = append(s.mounts, innerPath)
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}
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return multistep.ActionContinue
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}
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func (s *StepMountExtra) Cleanup(state map[string]interface{}) {
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if s.mounts == nil {
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return
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}
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config := state["config"].(*Config)
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ui := state["ui"].(packer.Ui)
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for i := len(s.mounts) - 1; i >= 0; i-- {
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path := s.mounts[i]
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unmountCommand := fmt.Sprintf("%s %s", config.UnmountCommand, path)
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stderr := new(bytes.Buffer)
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cmd := exec.Command("/bin/sh", "-c", unmountCommand)
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cmd.Stderr = stderr
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if err := cmd.Run(); err != nil {
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ui.Error(fmt.Sprintf(
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"Error unmounting device: %s\nStderr: %s", err, stderr.String()))
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return
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}
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}
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}
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