// Write will produce the resulting ACI from the current build context, saving
// it to the given path, optionally signing it.
func (a *ACBuild) Write(output string, overwrite, sign bool, gpgflags []string) (err error) {
if err = a.lock(); err != nil {
return err
}
defer func() {
if err1 := a.unlock(); err == nil {
err = err1
}
}()
man, err := util.GetManifest(a.CurrentACIPath)
if err != nil {
return err
}
if man.App != nil && len(man.App.Exec) == 0 {
fmt.Fprintf(os.Stderr, "warning: exec command was never set.\n")
}
if man.Name == types.ACIdentifier(placeholdername) {
return fmt.Errorf("can't write ACI, name was never set")
}
fileFlags := os.O_CREATE | os.O_WRONLY
_, err = os.Stat(output)
switch {
case os.IsNotExist(err):
break
case err != nil:
return err
default:
if !overwrite {
return fmt.Errorf("ACI already exists: %s", output)
}
fileFlags |= os.O_TRUNC
}
// open/create the aci file
ofile, err := os.OpenFile(output, fileFlags, 0644)
if err != nil {
return err
}
defer ofile.Close()
defer func() {
// When write is done, if an error is encountered remove the partial
// ACI that had been written.
if err != nil {
os.Remove(output)
os.Remove(output + ".asc")
}
}()
// setup compression
gzwriter := gzip.NewWriter(ofile)
defer gzwriter.Close()
// create the aci writer
aw := aci.NewImageWriter(*man, tar.NewWriter(gzwriter))
err = filepath.Walk(a.CurrentACIPath, aci.BuildWalker(a.CurrentACIPath, aw, nil))
defer aw.Close()
if err != nil {
pathErr, ok := err.(*os.PathError)
if !ok {
fmt.Printf("not a path error!\n")
return err
}
syscallErrno, ok := pathErr.Err.(syscall.Errno)
if !ok {
fmt.Printf("not a syscall errno!\n")
return err
}
if pathErr.Op == "open" && syscallErrno != syscall.EACCES {
return err
}
problemPath := pathErr.Path[len(path.Join(a.CurrentACIPath, aci.RootfsDir)):]
return fmt.Errorf("%q: permission denied - call write as root", problemPath)
}
if sign {
err = signACI(output, output+".asc", gpgflags)
if err != nil {
return err
}
}
return nil
}
// Write will produce the resulting ACI from the current build context, saving
// it to the given path, optionally signing it.
func (a *ACBuild) Write(output string, overwrite, sign bool, gpgflags []string) (err error) {
if err = a.lock(); err != nil {
return err
}
defer func() {
if err1 := a.unlock(); err == nil {
err = err1
}
}()
man, err := util.GetManifest(a.CurrentACIPath)
if err != nil {
return err
}
if man.App != nil && len(man.App.Exec) == 0 {
fmt.Fprintf(os.Stderr, "warning: exec command was never set.\n")
}
if man.Name == types.ACIdentifier(placeholdername) {
return fmt.Errorf("can't write ACI, name was never set")
}
fileFlags := os.O_CREATE | os.O_WRONLY
ex, err := util.Exists(output)
if err != nil {
return err
}
if ex {
if !overwrite {
return fmt.Errorf("ACI already exists: %s", output)
}
fileFlags |= os.O_TRUNC
}
// open/create the aci file
ofile, err := os.OpenFile(output, fileFlags, 0644)
if err != nil {
return err
}
defer ofile.Close()
// setup compression
gzwriter := gzip.NewWriter(ofile)
defer gzwriter.Close()
// create the aci writer
aw := aci.NewImageWriter(*man, tar.NewWriter(gzwriter))
err = filepath.Walk(a.CurrentACIPath, aci.BuildWalker(a.CurrentACIPath, aw, nil))
defer aw.Close()
if err != nil {
return err
}
if sign {
err = signACI(output, output+".asc", gpgflags)
if err != nil {
os.Remove(output)
os.Remove(output + ".asc")
return err
}
}
return nil
}