mirror of
https://github.com/linuxkit/linuxkit.git
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2ab099f349
Note that the EFI ISO is not yet automatically sized, and the kernel command lines are currently hard coded in the builders. Signed-off-by: Justin Cormack <justin.cormack@docker.com>
102 lines
2.3 KiB
Go
102 lines
2.3 KiB
Go
package main
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import (
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"archive/tar"
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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)
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const (
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bios = "mobylinux/mkimage-iso-bios:6b3ef6d6bdcc5fdf2ee683febac99533c2268c89@sha256:2484146c4dfbd2eee83d9dd3adf84d9232e5dd739d8762275dcd50bf60a529c6"
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efi = "mobylinux/mkimage-iso-efi:40f35270037dae95584324427e56f829756ff145@sha256:ae5b37ae560a5e030342f3d493d4ad611f2694bcd54eba86bf42ca069da986a7"
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)
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func outputs(m *Moby, bzimage []byte, initrd []byte) error {
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for _, o := range m.Outputs {
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switch o.Format {
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case "kernel+initrd":
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err := outputKernelInitrd(bzimage, initrd)
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if err != nil {
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return fmt.Errorf("Error writing %s output: %v", o.Format, err)
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}
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case "iso-bios":
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err := outputISO(bios, "mobylinux.iso", bzimage, initrd)
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if err != nil {
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return fmt.Errorf("Error writing %s output: %v", o.Format, err)
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}
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case "iso-efi":
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err := outputISO(efi, "mobylinux-efi.iso", bzimage, initrd)
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if err != nil {
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return fmt.Errorf("Error writing %s output: %v", o.Format, err)
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}
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case "":
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return fmt.Errorf("No format specified for output")
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default:
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return fmt.Errorf("Unknown output type %s", o.Format)
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}
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}
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return nil
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}
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// TODO add kernel command line
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func outputISO(image, filename string, bzimage []byte, initrd []byte) error {
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// first build the input tarball from kernel and initrd
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buf := new(bytes.Buffer)
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tw := tar.NewWriter(buf)
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hdr := &tar.Header{
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Name: "bzImage",
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Mode: 0600,
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Size: int64(len(bzimage)),
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}
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err := tw.WriteHeader(hdr)
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if err != nil {
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return err
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}
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_, err = tw.Write(bzimage)
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if err != nil {
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return err
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}
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hdr = &tar.Header{
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Name: "initrd.img",
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Mode: 0600,
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Size: int64(len(initrd)),
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}
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err = tw.WriteHeader(hdr)
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if err != nil {
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return err
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}
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_, err = tw.Write(initrd)
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if err != nil {
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return err
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}
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err = tw.Close()
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if err != nil {
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return err
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}
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iso, err := dockerRunInput(buf, image)
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if err != nil {
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return err
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}
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err = ioutil.WriteFile(filename, iso, os.FileMode(0644))
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if err != nil {
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return err
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}
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fmt.Println(filename)
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return nil
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}
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func outputKernelInitrd(bzimage []byte, initrd []byte) error {
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err := ioutil.WriteFile("initrd.img", initrd, os.FileMode(0644))
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if err != nil {
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return err
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}
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err = ioutil.WriteFile("bzImage", bzimage, os.FileMode(0644))
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if err != nil {
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return err
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}
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fmt.Println("bzImage initrd.img")
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return nil
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}
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