54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
package common
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import (
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"fmt"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/service/ec2"
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"github.com/mitchellh/multistep"
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"github.com/mitchellh/packer/packer"
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)
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// StepPreValidate provides an opportunity to pre-validate any configuration for
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// the build before actually doing any time consuming work
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//
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type StepPreValidate struct {
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DestAmiName string
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ForceDeregister bool
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}
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func (s *StepPreValidate) Run(state multistep.StateBag) multistep.StepAction {
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ui := state.Get("ui").(packer.Ui)
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if s.ForceDeregister {
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ui.Say("Force Deregister flag found, skipping prevalidating AMI Name")
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return multistep.ActionContinue
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}
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ec2conn := state.Get("ec2").(*ec2.EC2)
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ui.Say("Prevalidating AMI Name...")
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resp, err := ec2conn.DescribeImages(&ec2.DescribeImagesInput{
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Filters: []*ec2.Filter{&ec2.Filter{
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Name: aws.String("name"),
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Values: []*string{aws.String(s.DestAmiName)},
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}}})
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if err != nil {
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err := fmt.Errorf("Error querying AMI: %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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if len(resp.Images) > 0 {
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err := fmt.Errorf("Error: name conflicts with an existing AMI: %s", *resp.Images[0].ImageID)
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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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return multistep.ActionContinue
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}
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func (s *StepPreValidate) Cleanup(multistep.StateBag) {}
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