packer-cn/builder/amazon/chroot/step_copy_files.go

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package chroot
import (
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"bytes"
"fmt"
"github.com/mitchellh/multistep"
"github.com/mitchellh/packer/packer"
"log"
"path/filepath"
)
// StepCopyFiles copies some files from the host into the chroot environment.
//
// Produces:
// copy_files_cleanup CleanupFunc - A function to clean up the copied files
// early.
type StepCopyFiles struct {
files []string
}
func (s *StepCopyFiles) Run(state multistep.StateBag) multistep.StepAction {
config := state.Get("config").(*Config)
mountPath := state.Get("mount_path").(string)
ui := state.Get("ui").(packer.Ui)
wrappedCommand := state.Get("wrappedCommand").(CommandWrapper)
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stderr := new(bytes.Buffer)
s.files = make([]string, 0, len(config.CopyFiles))
if len(config.CopyFiles) > 0 {
ui.Say("Copying files from host to chroot...")
for _, path := range config.CopyFiles {
ui.Message(path)
chrootPath := filepath.Join(mountPath, path)
log.Printf("Copying '%s' to '%s'", path, chrootPath)
cmdText, err := wrappedCommand(fmt.Sprintf("cp --remove-destination %s %s", path, chrootPath))
if err != nil {
err := fmt.Errorf("Error building copy command: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
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stderr.Reset()
cmd := ShellCommand(cmdText)
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cmd.Stderr = stderr
if err := cmd.Run(); err != nil {
err := fmt.Errorf(
"Error copying file: %s\nnStderr: %s", err, stderr.String())
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
s.files = append(s.files, chrootPath)
}
}
state.Put("copy_files_cleanup", s)
return multistep.ActionContinue
}
func (s *StepCopyFiles) Cleanup(state multistep.StateBag) {
ui := state.Get("ui").(packer.Ui)
if err := s.CleanupFunc(state); err != nil {
ui.Error(err.Error())
}
}
func (s *StepCopyFiles) CleanupFunc(state multistep.StateBag) error {
wrappedCommand := state.Get("wrappedCommand").(CommandWrapper)
if s.files != nil {
for _, file := range s.files {
log.Printf("Removing: %s", file)
localCmdText, err := wrappedCommand(fmt.Sprintf("rm -f %s", file))
if err != nil {
return err
}
localCmd := ShellCommand(localCmdText)
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if err := localCmd.Run(); err != nil {
return err
}
}
}
s.files = nil
return nil
}