2013-07-15 02:56:28 -04:00
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// The instance package contains a packer.Builder implementation that builds
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// AMIs for Amazon EC2 backed by instance storage, as opposed to EBS storage.
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package instance
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import (
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"errors"
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"fmt"
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"github.com/mitchellh/goamz/aws"
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"github.com/mitchellh/goamz/ec2"
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"github.com/mitchellh/multistep"
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awscommon "github.com/mitchellh/packer/builder/amazon/common"
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"github.com/mitchellh/packer/builder/common"
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"github.com/mitchellh/packer/packer"
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"log"
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"os"
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"strings"
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"text/template"
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)
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// The unique ID for this builder
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const BuilderId = "mitchellh.amazon.instance"
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// Config is the configuration that is chained through the steps and
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// settable from the template.
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type Config struct {
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common.PackerConfig `mapstructure:",squash"`
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awscommon.AccessConfig `mapstructure:",squash"`
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awscommon.RunConfig `mapstructure:",squash"`
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AccountId string `mapstructure:"account_id"`
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AMIName string `mapstructure:"ami_name"`
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BundleDestination string `mapstructure:"bundle_destination"`
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BundlePrefix string `mapstructure:"bundle_prefix"`
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BundleUploadCommand string `mapstructure:"bundle_upload_command"`
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BundleVolCommand string `mapstructure:"bundle_vol_command"`
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S3Bucket string `mapstructure:"s3_bucket"`
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X509CertPath string `mapstructure:"x509_cert_path"`
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X509KeyPath string `mapstructure:"x509_key_path"`
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X509UploadPath string `mapstructure:"x509_upload_path"`
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}
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type Builder struct {
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config Config
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runner multistep.Runner
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}
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func (b *Builder) Prepare(raws ...interface{}) error {
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md, err := common.DecodeConfig(&b.config, raws...)
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if err != nil {
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return err
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}
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if b.config.BundleDestination == "" {
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b.config.BundleDestination = "/tmp"
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}
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if b.config.BundlePrefix == "" {
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b.config.BundlePrefix = "image-{{.CreateTime}}"
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}
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if b.config.BundleUploadCommand == "" {
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b.config.BundleUploadCommand = "sudo -n ec2-upload-bundle " +
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"-b {{.BucketName}} " +
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"-m {{.ManifestPath}} " +
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"-a {{.AccessKey}} " +
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"-s {{.SecretKey}} " +
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"-d {{.BundleDirectory}} " +
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"--batch " +
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"--retry"
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}
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if b.config.BundleVolCommand == "" {
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b.config.BundleVolCommand = "sudo -n ec2-bundle-vol " +
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"-k {{.KeyPath}} " +
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"-u {{.AccountId}} " +
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"-c {{.CertPath}} " +
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"-r {{.Architecture}} " +
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"-e {{.PrivatePath}} " +
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"-d {{.Destination}} " +
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"-p {{.Prefix}} " +
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"--batch"
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}
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if b.config.X509UploadPath == "" {
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b.config.X509UploadPath = "/tmp"
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}
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// Accumulate any errors
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errs := common.CheckUnusedConfig(md)
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errs = packer.MultiErrorAppend(errs, b.config.AccessConfig.Prepare()...)
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errs = packer.MultiErrorAppend(errs, b.config.RunConfig.Prepare()...)
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if b.config.AccountId == "" {
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errs = packer.MultiErrorAppend(errs, errors.New("account_id is required"))
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} else {
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b.config.AccountId = strings.Replace(b.config.AccountId, "-", "", -1)
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}
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if b.config.AMIName == "" {
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errs = packer.MultiErrorAppend(
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errs, errors.New("ami_name must be specified"))
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} else {
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_, err = template.New("ami").Parse(b.config.AMIName)
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if err != nil {
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errs = packer.MultiErrorAppend(
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errs, fmt.Errorf("Failed parsing ami_name: %s", err))
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}
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}
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if b.config.S3Bucket == "" {
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errs = packer.MultiErrorAppend(errs, errors.New("s3_bucket is required"))
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}
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if b.config.X509CertPath == "" {
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errs = packer.MultiErrorAppend(errs, errors.New("x509_cert_path is required"))
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} else if _, err := os.Stat(b.config.X509CertPath); err != nil {
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errs = packer.MultiErrorAppend(
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errs, fmt.Errorf("x509_cert_path points to bad file: %s", err))
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}
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if b.config.X509KeyPath == "" {
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errs = packer.MultiErrorAppend(errs, errors.New("x509_key_path is required"))
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} else if _, err := os.Stat(b.config.X509KeyPath); err != nil {
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errs = packer.MultiErrorAppend(
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errs, fmt.Errorf("x509_key_path points to bad file: %s", err))
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}
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if errs != nil && len(errs.Errors) > 0 {
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return errs
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}
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log.Printf("Config: %+v", b.config)
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return nil
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}
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func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
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region, ok := aws.Regions[b.config.Region]
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if !ok {
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panic("region not found")
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}
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auth, err := b.config.AccessConfig.Auth()
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if err != nil {
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return nil, err
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}
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ec2conn := ec2.New(auth, region)
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// Setup the state bag and initial state for the steps
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state := make(map[string]interface{})
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state["config"] = &b.config
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state["ec2"] = ec2conn
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state["hook"] = hook
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state["ui"] = ui
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// Build the steps
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steps := []multistep.Step{
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&awscommon.StepKeyPair{},
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&awscommon.StepSecurityGroup{
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SecurityGroupId: b.config.SecurityGroupId,
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SSHPort: b.config.SSHPort,
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VpcId: b.config.VpcId,
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},
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&awscommon.StepRunSourceInstance{
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ExpectedRootDevice: "instance-store",
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InstanceType: b.config.InstanceType,
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SourceAMI: b.config.SourceAmi,
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SubnetId: b.config.SubnetId,
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},
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&common.StepConnectSSH{
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SSHAddress: awscommon.SSHAddress(b.config.SSHPort),
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SSHConfig: awscommon.SSHConfig(b.config.SSHUsername),
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SSHWaitTimeout: b.config.SSHTimeout(),
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},
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&common.StepProvision{},
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&StepUploadX509Cert{},
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&StepBundleVolume{},
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&StepUploadBundle{},
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&StepRegisterAMI{},
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}
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// Run!
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if b.config.PackerDebug {
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b.runner = &multistep.DebugRunner{
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Steps: steps,
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PauseFn: common.MultistepDebugFn(ui),
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}
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} else {
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b.runner = &multistep.BasicRunner{Steps: steps}
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}
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b.runner.Run(state)
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// If there was an error, return that
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if rawErr, ok := state["error"]; ok {
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return nil, rawErr.(error)
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}
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// If there are no AMIs, then just return
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if _, ok := state["amis"]; !ok {
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return nil, nil
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}
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// Build the artifact and return it
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artifact := &awscommon.Artifact{
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Amis: state["amis"].(map[string]string),
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BuilderIdValue: BuilderId,
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Conn: ec2conn,
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}
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return artifact, nil
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}
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func (b *Builder) Cancel() {
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if b.runner != nil {
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log.Println("Cancelling the step runner...")
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b.runner.Cancel()
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}
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}
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