packer-cn/builder/googlecompute/step_check_existing_image.go
Scott Crunkleton b54b82d3ac Some googlecompute fixes and cleanup. Addresses https://github.com/mitchellh/packer/issues/3829. Changes:
- startup scripts don't run for Windows since it is isn't implemented yet.
- startup scripts use instance metadata instead of serial port output to flag when they are done.
- added licenses to Image data type (to check if an Image is a  Windows Image).
- added GetImage and GetImageFromProject to googlecompute Drivers.
- changed some of the builder/googlecompute tests to use github.com/stretchr/testify/assert.

Tests:
- (in the Packer directory) `go test .`, `go test ./builder/googlecompute`, and `go test ./post-processor/googlecompute-export`
- manual run of `packer build packer_template.json` with the following files

--packer_template.json--
{
  "builders": [
    {
      "type": "googlecompute",
      "account_file": "creds.json",
      "project_id": "google.com:packer-test",
      "source_image": "debian-8-jessie-v20160629",
      "zone": "us-central1-a",
      "startup_script_file": "startup_script.sh",
      "metadata": {
        "startup-script": "#!/bin/sh\necho \"This should be overwritten.\"",
        "startup-script-log-dest": "gs://packer-test.google.com.a.appspot.com/startup-script.log"
      },
      "image_name": "test-packer-modifications",
      "ssh_username": "foo"
    }
  ],
  "post-processors": [
    {
      "type": "googlecompute-export",
      "paths": [
        "gs://packer-test.google.com.a.appspot.com/foo.tar.gz",
        "gs://packer-test.google.com.a.appspot.com/bar.tar.gz"
      ],
      "keep_input_artifact": true
    }
  ]
}

--startup_script.sh--
\#!/bin/sh
echo "Hi, my name is Scott. I'm waiting 60 seconds!" >> /scott
sleep 60
echo "I'm done waiting!" >> /scott
2016-09-09 16:22:50 -07:00

34 lines
915 B
Go

package googlecompute
import (
"fmt"
"github.com/mitchellh/multistep"
"github.com/mitchellh/packer/packer"
)
// StepCheckExistingImage represents a Packer build step that checks if the
// target image already exists, and aborts immediately if so.
type StepCheckExistingImage int
// Run executes the Packer build step that checks if the image already exists.
func (s *StepCheckExistingImage) Run(state multistep.StateBag) multistep.StepAction {
c := state.Get("config").(*Config)
d := state.Get("driver").(Driver)
ui := state.Get("ui").(packer.Ui)
ui.Say("Checking image does not exist...")
exists := d.ImageExists(c.ImageName)
if exists {
err := fmt.Errorf("Image %s already exists", c.ImageName)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
return multistep.ActionContinue
}
// Cleanup.
func (s *StepCheckExistingImage) Cleanup(state multistep.StateBag) {}