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package docker
import (
"context"
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"github.com/hashicorp/packer/packer-plugin-sdk/multistep"
packersdk "github.com/hashicorp/packer/packer-plugin-sdk/packer"
"github.com/hashicorp/packer/packer-plugin-sdk/pathing"
)
// StepTempDir creates a temporary directory that we use in order to
// share data with the docker container over the communicator.
type StepTempDir struct {
tempDir string
}
// ConfigTmpDir returns the configuration tmp directory for Docker
func ConfigTmpDir() (string, error) {
configdir, err := pathing.ConfigDir()
if err != nil {
return "", err
}
if tmpdir := os.Getenv("PACKER_TMP_DIR"); tmpdir != "" {
// override the config dir with tmp dir. Still stat it and mkdirall if
// necessary.
fp, err := filepath.Abs(tmpdir)
log.Printf("found PACKER_TMP_DIR env variable; setting tmpdir to %s", fp)
if err != nil {
return "", err
}
configdir = fp
}
_, err = os.Stat(configdir)
if os.IsNotExist(err) {
log.Printf("Config dir %s does not exist; creating...", configdir)
if err = os.MkdirAll(configdir, 0755); err != nil {
return "", err
}
} else if err != nil {
return "", err
}
td, err := ioutil.TempDir(configdir, "tmp")
if err != nil {
return "", fmt.Errorf("Error creating temp dir: %s", err)
}
log.Printf("Set Packer temp dir to %s", td)
return td, nil
}
func (s *StepTempDir) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
ui := state.Get("ui").(packersdk.Ui)
ui.Say("Creating a temporary directory for sharing data...")
tempdir, err := ConfigTmpDir()
if err != nil {
err := fmt.Errorf("Error making temp dir: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
s.tempDir = tempdir
state.Put("temp_dir", s.tempDir)
return multistep.ActionContinue
}
func (s *StepTempDir) Cleanup(state multistep.StateBag) {
if s.tempDir != "" {
os.RemoveAll(s.tempDir)
}
}
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