68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
package docker
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import (
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"context"
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"fmt"
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"os"
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"path/filepath"
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"github.com/hashicorp/packer/helper/multistep"
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"github.com/hashicorp/packer/packer"
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)
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// StepExport exports the container to a flat tar file.
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type StepExport struct{}
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func (s *StepExport) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
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ui := state.Get("ui").(packer.Ui)
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config, ok := state.Get("config").(*Config)
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if !ok {
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err := fmt.Errorf("error encountered obtaining docker config")
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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// We should catch this in validation, but guard anyway
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if config.ExportPath == "" {
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err := fmt.Errorf("No output file specified, we can't export anything")
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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// Make the directory we're exporting to if it doesn't exist
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exportDir := filepath.Dir(config.ExportPath)
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if err := os.MkdirAll(exportDir, 0755); err != nil {
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state.Put("error", err)
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return multistep.ActionHalt
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}
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// Open the file that we're going to write to
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f, err := os.Create(config.ExportPath)
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if err != nil {
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err := fmt.Errorf("Error creating output file: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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driver := state.Get("driver").(Driver)
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containerId := state.Get("container_id").(string)
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ui.Say("Exporting the container")
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if err := driver.Export(containerId, f); err != nil {
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f.Close()
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os.Remove(f.Name())
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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f.Close()
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return multistep.ActionContinue
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}
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func (s *StepExport) Cleanup(state multistep.StateBag) {}
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