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package qemu
import (
"context"
"fmt"
"path/filepath"
"github.com/hashicorp/packer/packer-plugin-sdk/multistep"
packersdk "github.com/hashicorp/packer/packer-plugin-sdk/packer"
)
// This step copies the virtual disk that will be used as the
// hard drive for the virtual machine.
type stepCopyDisk struct {
DiskImage bool
Format string
OutputDir string
UseBackingFile bool
VMName string
QemuImgArgs QemuImgArgs
}
func (s *stepCopyDisk) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
driver := state.Get("driver").(Driver)
isoPath := state.Get("iso_path").(string)
ui := state.Get("ui").(packersdk.Ui)
path := filepath.Join(s.OutputDir, s.VMName)
// Only make a copy of the ISO as the 'main' or 'default' disk if is a disk
// image and not using a backing file. The create disk step (step_create_disk.go)
// would already have made the disk otherwise
if !s.DiskImage || s.UseBackingFile {
return multistep.ActionContinue
}
// In some cases, the file formats provided are equivalent by comparing the
// file extensions. Skip the conversion step
// This also serves as a workaround for a QEMU bug: https://bugs.launchpad.net/qemu/+bug/1776920
ext := filepath.Ext(isoPath)
if len(ext) >= 1 && ext[1:] == s.Format && len(s.QemuImgArgs.Convert) == 0 {
ui.Message("File extension already matches desired output format. " +
"Skipping qemu-img convert step")
err := driver.Copy(isoPath, path)
if err != nil {
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
return multistep.ActionContinue
}
command := s.buildConvertCommand(isoPath, path)
ui.Say("Copying hard drive...")
if err := driver.QemuImg(command...); err != nil {
err := fmt.Errorf("Error creating hard drive: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
return multistep.ActionContinue
}
func (s *stepCopyDisk) buildConvertCommand(sourcePath, targetPath string) []string {
command := []string{"convert"}
// Add user-provided convert args
command = append(command, s.QemuImgArgs.Convert...)
// Add format, and paths.
command = append(command, "-O", s.Format, sourcePath, targetPath)
return command
}
func (s *stepCopyDisk) Cleanup(state multistep.StateBag) {}
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