packer-cn/fix/fixer_iso_md5.go

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2013-07-14 03:51:20 -04:00
package fix
import (
"github.com/mitchellh/mapstructure"
)
// FixerISOMD5 is a Fixer that replaces the "iso_md5" configuration key
// with the newer "iso_checksum" and "iso_checksum_type" within builders.
type FixerISOMD5 struct{}
func (FixerISOMD5) Fix(input map[string]interface{}) (map[string]interface{}, error) {
// Our template type we'll use for this fixer only
type template struct {
Builders []map[string]interface{}
}
// Decode the input into our structure, if we can
var tpl template
if err := mapstructure.Decode(input, &tpl); err != nil {
return nil, err
}
// Go through each builder and replace the iso_md5 if we can
for _, builder := range tpl.Builders {
md5raw, ok := builder["iso_md5"]
if !ok {
continue
}
md5, ok := md5raw.(string)
if !ok {
// TODO: error?
continue
}
delete(builder, "iso_md5")
builder["iso_checksum"] = md5
builder["iso_checksum_type"] = "md5"
}
input["builders"] = tpl.Builders
return input, nil
}
func (FixerISOMD5) Synopsis() string {
return `Replaces "iso_md5" in builders with "iso_checksum"`
}