141 lines
3.7 KiB
Go
141 lines
3.7 KiB
Go
package chroot
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// mostly borrowed from ./builder/amazon/chroot/step_mount_device.go
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import (
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"bytes"
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"context"
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"fmt"
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"log"
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"os"
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"path/filepath"
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"runtime"
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"strings"
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"github.com/hashicorp/packer-plugin-sdk/common"
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"github.com/hashicorp/packer-plugin-sdk/multistep"
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packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
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"github.com/hashicorp/packer-plugin-sdk/template/interpolate"
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)
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var _ multistep.Step = &StepMountDevice{}
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type StepMountDevice struct {
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MountOptions []string
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MountPartition string
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MountPath string
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mountPath string
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}
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func (s *StepMountDevice) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
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ui := state.Get("ui").(packersdk.Ui)
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device := state.Get("device").(string)
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config := state.Get("config").(*Config)
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wrappedCommand := state.Get("wrappedCommand").(common.CommandWrapper)
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ictx := config.ctx
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ictx.Data = &struct{ Device string }{Device: filepath.Base(device)}
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mountPath, err := interpolate.Render(s.MountPath, &ictx)
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if err != nil {
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err := fmt.Errorf("error preparing mount directory: %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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mountPath, err = filepath.Abs(mountPath)
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if err != nil {
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err := fmt.Errorf("error preparing mount directory: %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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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.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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var deviceMount string
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switch runtime.GOOS {
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case "freebsd":
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deviceMount = fmt.Sprintf("%sp%s", device, s.MountPartition)
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default:
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deviceMount = fmt.Sprintf("%s%s", device, s.MountPartition)
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}
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state.Put("deviceMount", deviceMount)
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ui.Say("Mounting the root device...")
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stderr := new(bytes.Buffer)
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// build mount options from mount_options config, useful for nouuid options
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// or other specific device type settings for mount
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opts := ""
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if len(s.MountOptions) > 0 {
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opts = "-o " + strings.Join(s.MountOptions, " -o ")
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}
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mountCommand, err := wrappedCommand(
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fmt.Sprintf("mount %s %s %s", opts, deviceMount, mountPath))
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if err != nil {
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err := fmt.Errorf("error creating mount command: %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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log.Printf("[DEBUG] (step mount) mount command is %s", mountCommand)
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cmd := common.ShellCommand(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 root volume: %s\nStderr: %s", err, stderr.String())
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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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// Set the mount path so we remember to unmount it later
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s.mountPath = mountPath
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state.Put("mount_path", s.mountPath)
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state.Put("mount_device_cleanup", s)
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return multistep.ActionContinue
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}
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func (s *StepMountDevice) Cleanup(state multistep.StateBag) {
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ui := state.Get("ui").(packersdk.Ui)
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if err := s.CleanupFunc(state); err != nil {
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ui.Error(err.Error())
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}
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}
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func (s *StepMountDevice) CleanupFunc(state multistep.StateBag) error {
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if s.mountPath == "" {
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return nil
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}
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ui := state.Get("ui").(packersdk.Ui)
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wrappedCommand := state.Get("wrappedCommand").(common.CommandWrapper)
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ui.Say("Unmounting the root device...")
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unmountCommand, err := wrappedCommand(fmt.Sprintf("umount %s", s.mountPath))
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if err != nil {
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return fmt.Errorf("error creating unmount command: %s", err)
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}
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cmd := common.ShellCommand(unmountCommand)
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if err := cmd.Run(); err != nil {
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return fmt.Errorf("error unmounting root device: %s", err)
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}
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s.mountPath = ""
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return nil
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}
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