86 lines
1.8 KiB
Go
86 lines
1.8 KiB
Go
package common
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import (
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"fmt"
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"log"
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"os"
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"path/filepath"
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"time"
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"github.com/hashicorp/packer/packer"
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"github.com/mitchellh/multistep"
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)
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// StepOutputDir sets up the output directory by creating it if it does
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// not exist, deleting it if it does exist and we're forcing, and cleaning
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// it up when we're done with it.
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type StepOutputDir struct {
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Force bool
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Path string
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cleanup bool
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}
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func (s *StepOutputDir) Run(state multistep.StateBag) multistep.StepAction {
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ui := state.Get("ui").(packer.Ui)
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if _, err := os.Stat(s.Path); err == nil {
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if !s.Force {
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err := fmt.Errorf(
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"Output directory exists: %s\n\n"+
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"Use the force flag to delete it prior to building.",
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s.Path)
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state.Put("error", err)
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return multistep.ActionHalt
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}
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ui.Say("Deleting previous output directory...")
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os.RemoveAll(s.Path)
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}
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// Enable cleanup
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s.cleanup = true
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// Create the directory
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if err := os.MkdirAll(s.Path, 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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// Make sure we can write in the directory
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f, err := os.Create(filepath.Join(s.Path, "_packer_perm_check"))
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if err != nil {
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err = fmt.Errorf("Couldn't write to output directory: %s", err)
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state.Put("error", err)
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return multistep.ActionHalt
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}
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f.Close()
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os.Remove(f.Name())
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return multistep.ActionContinue
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}
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func (s *StepOutputDir) Cleanup(state multistep.StateBag) {
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if !s.cleanup {
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return
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}
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_, cancelled := state.GetOk(multistep.StateCancelled)
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_, halted := state.GetOk(multistep.StateHalted)
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if cancelled || halted {
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ui := state.Get("ui").(packer.Ui)
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ui.Say("Deleting output directory...")
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for i := 0; i < 5; i++ {
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err := os.RemoveAll(s.Path)
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if err == nil {
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break
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}
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log.Printf("Error removing output dir: %s", err)
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time.Sleep(2 * time.Second)
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}
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}
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}
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