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https://github.com/linuxkit/linuxkit.git
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output: Extract ucode if present
For now the backends for the different formats do not yet use the extracted ucode cpio archive, but '// TODO' are placed for the backends which should eventually handle it. Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
This commit is contained in:
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0c1b1def13
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2b1a611bab
@ -110,13 +110,13 @@ func CopyTar(w *Writer, r *tar.Reader) (written int64, err error) {
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}
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}
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}
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}
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// CopySplitTar copies a tar stream into an initrd, but splits out kernel and cmdline
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// CopySplitTar copies a tar stream into an initrd, but splits out kernel, cmdline, and ucode
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func CopySplitTar(w *Writer, r *tar.Reader) (kernel []byte, cmdline string, err error) {
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func CopySplitTar(w *Writer, r *tar.Reader) (kernel []byte, cmdline string, ucode []byte, err error) {
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for {
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for {
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var thdr *tar.Header
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var thdr *tar.Header
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thdr, err = r.Next()
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thdr, err = r.Next()
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if err == io.EOF {
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if err == io.EOF {
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return kernel, cmdline, nil
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return kernel, cmdline, ucode, nil
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}
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}
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if err != nil {
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if err != nil {
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return
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return
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@ -134,6 +134,11 @@ func CopySplitTar(w *Writer, r *tar.Reader) (kernel []byte, cmdline string, err
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return
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return
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}
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}
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cmdline = string(buf)
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cmdline = string(buf)
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case "boot/ucode.cpio":
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ucode, err = ioutil.ReadAll(r)
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if err != nil {
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return
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}
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case "boot":
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case "boot":
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// skip this entry
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// skip this entry
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default:
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default:
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@ -72,7 +72,7 @@ func ensureLinuxkitImage(name string) error {
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return err
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return err
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}
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}
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defer image.Close()
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defer image.Close()
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kernel, initrd, cmdline, err := tarToInitrd(image)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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}
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@ -27,10 +27,11 @@ const (
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var outFuns = map[string]func(string, io.Reader, int) error{
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var outFuns = map[string]func(string, io.Reader, int) error{
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"kernel+initrd": func(base string, image io.Reader, size int) error {
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"kernel+initrd": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, err := tarToInitrd(image)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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}
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// TODO: Handle ucode
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err = outputKernelInitrd(base, kernel, initrd, cmdline)
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err = outputKernelInitrd(base, kernel, initrd, cmdline)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error writing kernel+initrd output: %v", err)
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return fmt.Errorf("Error writing kernel+initrd output: %v", err)
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@ -38,10 +39,11 @@ var outFuns = map[string]func(string, io.Reader, int) error{
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return nil
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return nil
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},
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},
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"tar-kernel-initrd": func(base string, image io.Reader, size int) error {
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"tar-kernel-initrd": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, err := tarToInitrd(image)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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}
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// TODO: Handle ucode
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if err := outputKernelInitrdTarball(base, kernel, initrd, cmdline); err != nil {
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if err := outputKernelInitrdTarball(base, kernel, initrd, cmdline); err != nil {
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return fmt.Errorf("Error writing kernel+initrd tarball output: %v", err)
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return fmt.Errorf("Error writing kernel+initrd tarball output: %v", err)
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}
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}
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@ -62,10 +64,11 @@ var outFuns = map[string]func(string, io.Reader, int) error{
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return nil
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return nil
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},
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},
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"raw-bios": func(base string, image io.Reader, size int) error {
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"raw-bios": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, err := tarToInitrd(image)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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}
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// TODO: Handle ucode
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err = outputImg(rawBios, base+"-bios.img", kernel, initrd, cmdline)
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err = outputImg(rawBios, base+"-bios.img", kernel, initrd, cmdline)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error writing raw-bios output: %v", err)
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return fmt.Errorf("Error writing raw-bios output: %v", err)
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@ -73,7 +76,7 @@ var outFuns = map[string]func(string, io.Reader, int) error{
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return nil
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return nil
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},
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},
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"raw-efi": func(base string, image io.Reader, size int) error {
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"raw-efi": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, err := tarToInitrd(image)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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}
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@ -86,7 +89,7 @@ var outFuns = map[string]func(string, io.Reader, int) error{
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"aws": func(base string, image io.Reader, size int) error {
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"aws": func(base string, image io.Reader, size int) error {
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filename := base + ".raw"
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filename := base + ".raw"
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log.Infof(" %s", filename)
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log.Infof(" %s", filename)
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kernel, initrd, cmdline, err := tarToInitrd(image)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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}
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@ -97,7 +100,7 @@ var outFuns = map[string]func(string, io.Reader, int) error{
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return nil
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return nil
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},
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},
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"gcp": func(base string, image io.Reader, size int) error {
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"gcp": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, err := tarToInitrd(image)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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}
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@ -110,10 +113,11 @@ var outFuns = map[string]func(string, io.Reader, int) error{
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"qcow2-bios": func(base string, image io.Reader, size int) error {
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"qcow2-bios": func(base string, image io.Reader, size int) error {
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filename := base + ".qcow2"
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filename := base + ".qcow2"
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log.Infof(" %s", filename)
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log.Infof(" %s", filename)
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kernel, initrd, cmdline, err := tarToInitrd(image)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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}
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// TODO: Handle ucode
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err = outputLinuxKit("qcow2", filename, kernel, initrd, cmdline, size)
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err = outputLinuxKit("qcow2", filename, kernel, initrd, cmdline, size)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error writing qcow2 output: %v", err)
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return fmt.Errorf("Error writing qcow2 output: %v", err)
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@ -121,7 +125,7 @@ var outFuns = map[string]func(string, io.Reader, int) error{
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return nil
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return nil
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},
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},
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"vhd": func(base string, image io.Reader, size int) error {
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"vhd": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, err := tarToInitrd(image)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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}
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@ -132,7 +136,7 @@ var outFuns = map[string]func(string, io.Reader, int) error{
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return nil
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return nil
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},
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},
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"dynamic-vhd": func(base string, image io.Reader, size int) error {
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"dynamic-vhd": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, err := tarToInitrd(image)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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}
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@ -143,7 +147,7 @@ var outFuns = map[string]func(string, io.Reader, int) error{
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return nil
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return nil
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},
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},
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"vmdk": func(base string, image io.Reader, size int) error {
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"vmdk": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, err := tarToInitrd(image)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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}
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@ -220,16 +224,16 @@ func Formats(base string, image string, formats []string, size int) error {
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return nil
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return nil
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}
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}
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func tarToInitrd(r io.Reader) ([]byte, []byte, string, error) {
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func tarToInitrd(r io.Reader) ([]byte, []byte, string, []byte, error) {
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w := new(bytes.Buffer)
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w := new(bytes.Buffer)
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iw := initrd.NewWriter(w)
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iw := initrd.NewWriter(w)
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tr := tar.NewReader(r)
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tr := tar.NewReader(r)
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kernel, cmdline, err := initrd.CopySplitTar(iw, tr)
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kernel, cmdline, ucode, err := initrd.CopySplitTar(iw, tr)
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if err != nil {
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if err != nil {
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return []byte{}, []byte{}, "", err
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return []byte{}, []byte{}, "", []byte{}, err
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}
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}
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iw.Close()
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iw.Close()
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return kernel, w.Bytes(), cmdline, nil
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return kernel, w.Bytes(), cmdline, ucode, nil
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}
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}
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func tarInitrdKernel(kernel, initrd []byte, cmdline string) (*bytes.Buffer, error) {
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func tarInitrdKernel(kernel, initrd []byte, cmdline string) (*bytes.Buffer, error) {
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