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Merge pull request #3213 from rn/build-improv

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build: Don't create empty kernel/cmdline files
This commit is contained in:
Rolf Neugebauer 2018-10-29 22:27:24 +00:00 committed by GitHub
commit 09420e89f1
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 60 additions and 45 deletions
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105
src/cmd/linuxkit/moby/output.go
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@ -370,24 +370,33 @@ func outputKernelInitrd(base string, kernel []byte, initrd []byte, cmdline strin
if err := ioutil.WriteFile(base+"-initrd.img", ucode, os.FileMode(0644)); err != nil {
return err
}
f, err := os.OpenFile(base+"-initrd.img", os.O_APPEND|os.O_WRONLY, 0644)
if err != nil {
return err
}
defer f.Close()
if _, err = f.Write(initrd); err != nil {
return err
if len(initrd) != 0 {
f, err := os.OpenFile(base+"-initrd.img", os.O_APPEND|os.O_WRONLY, 0644)
if err != nil {
return err
}
defer f.Close()
if _, err = f.Write(initrd); err != nil {
return err
}
}
} else {
log.Infof(" %s %s %s", base+"-kernel", base+"-initrd.img", base+"-cmdline")
if err := ioutil.WriteFile(base+"-initrd.img", initrd, os.FileMode(0644)); err != nil {
if len(initrd) != 0 {
log.Infof(" %s %s %s", base+"-kernel", base+"-initrd.img", base+"-cmdline")
if err := ioutil.WriteFile(base+"-initrd.img", initrd, os.FileMode(0644)); err != nil {
return err
}
}
}
if len(kernel) != 0 {
if err := ioutil.WriteFile(base+"-kernel", kernel, os.FileMode(0644)); err != nil {
return err
}
}
if err := ioutil.WriteFile(base+"-kernel", kernel, os.FileMode(0644)); err != nil {
return err
if len(cmdline) != 0 {
return ioutil.WriteFile(base+"-cmdline", []byte(cmdline), os.FileMode(0644))
}
return ioutil.WriteFile(base+"-cmdline", []byte(cmdline), os.FileMode(0644))
return nil
}
func outputKernelInitrdTarball(base string, kernel []byte, initrd []byte, cmdline string, ucode []byte) error {
@ -399,41 +408,47 @@ func outputKernelInitrdTarball(base string, kernel []byte, initrd []byte, cmdlin
}
defer f.Close()
tw := tar.NewWriter(f)
hdr := &tar.Header{
Name: "kernel",
Mode: 0644,
Size: int64(len(kernel)),
Format: tar.FormatPAX,
if len(kernel) != 0 {
hdr := &tar.Header{
Name: "kernel",
Mode: 0644,
Size: int64(len(kernel)),
Format: tar.FormatPAX,
}
if err := tw.WriteHeader(hdr); err != nil {
return err
}
if _, err := tw.Write(kernel); err != nil {
return err
}
}
if err := tw.WriteHeader(hdr); err != nil {
return err
if len(initrd) != 0 {
hdr := &tar.Header{
Name: "initrd.img",
Mode: 0644,
Size: int64(len(initrd)),
Format: tar.FormatPAX,
}
if err := tw.WriteHeader(hdr); err != nil {
return err
}
if _, err := tw.Write(initrd); err != nil {
return err
}
}
if _, err := tw.Write(kernel); err != nil {
return err
}
hdr = &tar.Header{
Name: "initrd.img",
Mode: 0644,
Size: int64(len(initrd)),
Format: tar.FormatPAX,
}
if err := tw.WriteHeader(hdr); err != nil {
return err
}
if _, err := tw.Write(initrd); err != nil {
return err
}
hdr = &tar.Header{
Name: "cmdline",
Mode: 0644,
Size: int64(len(cmdline)),
Format: tar.FormatPAX,
}
if err := tw.WriteHeader(hdr); err != nil {
return err
}
if _, err := tw.Write([]byte(cmdline)); err != nil {
return err
if len(cmdline) != 0 {
hdr := &tar.Header{
Name: "cmdline",
Mode: 0644,
Size: int64(len(cmdline)),
Format: tar.FormatPAX,
}
if err := tw.WriteHeader(hdr); err != nil {
return err
}
if _, err := tw.Write([]byte(cmdline)); err != nil {
return err
}
}
if len(ucode) != 0 {
hdr := &tar.Header{