161 lines
4.0 KiB
Go
161 lines
4.0 KiB
Go
package common
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import (
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"context"
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"fmt"
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"regexp"
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"strconv"
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"strings"
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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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)
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type StepSetFirstBootDevice struct {
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Generation uint
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FirstBootDevice string
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}
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func ParseBootDeviceIdentifier(deviceIdentifier string, generation uint) (string, uint, uint, error) {
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// all input strings are forced to upperCase for comparison, I believe this is
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// safe as all of our values are 7bit ASCII clean.
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lookupDeviceIdentifier := strings.ToUpper(deviceIdentifier)
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if generation == 1 {
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// Gen1 values are a simple set of if/then/else values, which we coalesce into a map
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// here for simplicity
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lookupTable := map[string]string{
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"FLOPPY": "FLOPPY",
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"IDE": "IDE",
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"NET": "NET",
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"CD": "CD",
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"DVD": "CD",
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}
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controllerType, isDefined := lookupTable[lookupDeviceIdentifier]
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if !isDefined {
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return "", 0, 0, fmt.Errorf("The value %q is not a properly formatted device group identifier.", deviceIdentifier)
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}
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// success
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return controllerType, 0, 0, nil
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}
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// everything else is treated as generation 2... the first set of lookups covers
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// the simple options..
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lookupTable := map[string]string{
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"CD": "CD",
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"DVD": "CD",
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"NET": "NET",
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}
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controllerType, isDefined := lookupTable[lookupDeviceIdentifier]
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if isDefined {
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// these types do not require controllerNumber or controllerLocation
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return controllerType, 0, 0, nil
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}
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// not a simple option, check for a controllerType:controllerNumber:controllerLocation formatted
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// device..
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r, err := regexp.Compile(`^(IDE|SCSI):(\d+):(\d+)$`)
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if err != nil {
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return "", 0, 0, err
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}
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controllerMatch := r.FindStringSubmatch(lookupDeviceIdentifier)
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if controllerMatch != nil {
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var controllerLocation int64
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var controllerNumber int64
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// NOTE: controllerNumber and controllerLocation cannot be negative, the regex expression
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// would not have matched if either number was signed
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controllerNumber, err = strconv.ParseInt(controllerMatch[2], 10, 8)
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if err == nil {
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controllerLocation, err = strconv.ParseInt(controllerMatch[3], 10, 8)
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if err == nil {
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return controllerMatch[1], uint(controllerNumber), uint(controllerLocation), nil
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}
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}
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return "", 0, 0, err
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}
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return "", 0, 0, fmt.Errorf("The value %q is not a properly formatted device identifier.", deviceIdentifier)
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}
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func (s *StepSetFirstBootDevice) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
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driver := state.Get("driver").(Driver)
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ui := state.Get("ui").(packersdk.Ui)
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vmName := state.Get("vmName").(string)
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if s.FirstBootDevice != "" {
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controllerType, controllerNumber, controllerLocation, err := ParseBootDeviceIdentifier(s.FirstBootDevice, s.Generation)
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if err == nil {
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switch {
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case controllerType == "CD":
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{
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// the "DVD" controller is special, we only apply the setting if we actually mounted
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// an ISO and only if that was mounted as the "IsoUrl" not a secondary ISO.
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dvdControllerState := state.Get("os.dvd.properties")
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if dvdControllerState == nil {
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ui.Say("First Boot Device is DVD, but no primary ISO mounted. Ignoring.")
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return multistep.ActionContinue
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}
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ui.Say(fmt.Sprintf("Setting boot device to %q", s.FirstBootDevice))
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dvdController := dvdControllerState.(DvdControllerProperties)
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err = driver.SetFirstBootDevice(vmName, controllerType, dvdController.ControllerNumber, dvdController.ControllerLocation, s.Generation)
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}
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default:
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{
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// anything else, we just pass as is..
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ui.Say(fmt.Sprintf("Setting boot device to %q", s.FirstBootDevice))
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err = driver.SetFirstBootDevice(vmName, controllerType, controllerNumber, controllerLocation, s.Generation)
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}
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}
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}
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if err != nil {
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err := fmt.Errorf("Error setting first boot 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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return multistep.ActionContinue
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}
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func (s *StepSetFirstBootDevice) Cleanup(state multistep.StateBag) {
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// do nothing
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}
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