mirror of
https://github.com/linuxkit/linuxkit.git
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102 lines
2.4 KiB
Go
102 lines
2.4 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:489b1f054a77a8f379d0bfc6cd91639b4db6b67c@sha256:0f058951aac4367d132682aa19eeb5cdcb05600a5d51fe5d0fcbd97b03ae4f87"
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efi = "mobylinux/mkimage-iso-efi:b210c58e096e53082d35b28fa2b52dba6ae200c8@sha256:10c2789bf5fbd27c35c5fe2f3b97f75a7108bbde389d0f5ed750e3e2dae95376"
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)
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func outputs(m *Moby, base string, 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(base, 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, base+".iso", bzimage, initrd, m.Kernel.Cmdline)
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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, base+"-efi.iso", bzimage, initrd, m.Kernel.Cmdline)
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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, args ...string) 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, append([]string{image}, args...)...)
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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(base string, bzimage []byte, initrd []byte) error {
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err := ioutil.WriteFile(base+"-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(base+"-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(base + "-bzImage " + base + "-initrd.img")
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return nil
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}
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