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post-processor.go
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post-processor.go
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// vagrant implements the packer.PostProcessor interface and adds a
// post-processor that turns artifacts of known builders into Vagrant
// boxes.
package vagrant
import (
"fmt"
"github.com/mitchellh/mapstructure"
"github.com/mitchellh/packer/packer"
"log"
"text/template"
)
var builtins = map[string]string{
"mitchellh.amazonebs": "aws",
"mitchellh.virtualbox": "virtualbox",
"mitchellh.vmware": "vmware",
}
type Config struct {
OutputPath string `mapstructure:"output"`
PackerBuildName string `mapstructure:"packer_build_name"`
}
type PostProcessor struct {
config Config
premade map[string]packer.PostProcessor
rawConfigs []interface{}
}
func (p *PostProcessor) Configure(raws ...interface{}) error {
// Store the raw configs for usage later
p.rawConfigs = raws
for _, raw := range raws {
err := mapstructure.Decode(raw, &p.config)
if err != nil {
return err
}
}
ppExtraConfig := make(map[string]interface{})
if p.config.OutputPath == "" {
p.config.OutputPath = "packer_{{ .BuildName }}_{{.Provider}}.box"
ppExtraConfig["output"] = p.config.OutputPath
}
_, err := template.New("output").Parse(p.config.OutputPath)
if err != nil {
return fmt.Errorf("output invalid template: %s", err)
}
// Store the extra configuration for post-processors
p.rawConfigs = append(p.rawConfigs, ppExtraConfig)
// TODO(mitchellh): Properly handle multiple raw configs
var mapConfig map[string]interface{}
if err := mapstructure.Decode(raws[0], &mapConfig); err != nil {
return err
}
p.premade = make(map[string]packer.PostProcessor)
errors := make([]error, 0)
for k, raw := range mapConfig {
pp := keyToPostProcessor(k)
if pp == nil {
continue
}
// Create the proper list of configurations
ppConfigs := make([]interface{}, 0, len(p.rawConfigs)+1)
copy(ppConfigs, p.rawConfigs)
ppConfigs = append(ppConfigs, raw)
if err := pp.Configure(ppConfigs...); err != nil {
errors = append(errors, err)
}
p.premade[k] = pp
}
if len(errors) > 0 {
return &packer.MultiError{errors}
}
return nil
}
func (p *PostProcessor) PostProcess(ui packer.Ui, artifact packer.Artifact) (packer.Artifact, bool, error) {
ppName, ok := builtins[artifact.BuilderId()]
if !ok {
return nil, false, fmt.Errorf("Unknown artifact type, can't build box: %s", artifact.BuilderId())
}
// Use the premade PostProcessor if we have one. Otherwise, we
// create it and configure it here.
pp, ok := p.premade[ppName]
if !ok {
log.Printf("Premade post-processor for '%s' not found. Creating.", ppName)
pp = keyToPostProcessor(ppName)
if pp == nil {
return nil, false, fmt.Errorf("Vagrant box post-processor not found: %s", ppName)
}
if err := pp.Configure(p.rawConfigs...); err != nil {
return nil, false, err
}
}
ui.Say(fmt.Sprintf("Creating Vagrant box for '%s' provider", ppName))
return pp.PostProcess(ui, artifact)
}
func keyToPostProcessor(key string) packer.PostProcessor {
switch key {
case "aws":
return new(AWSBoxPostProcessor)
case "virtualbox":
return new(VBoxBoxPostProcessor)
case "vmware":
return new(VMwareBoxPostProcessor)
default:
return nil
}
}