github.com/kaixiang/packer@v0.5.2-0.20140114230416-1f5786b0d7f1/command/fix/fixer_iso_md5.go (about)

     1  package fix
     2  
     3  import (
     4  	"github.com/mitchellh/mapstructure"
     5  )
     6  
     7  // FixerISOMD5 is a Fixer that replaces the "iso_md5" configuration key
     8  // with the newer "iso_checksum" and "iso_checksum_type" within builders.
     9  type FixerISOMD5 struct{}
    10  
    11  func (FixerISOMD5) Fix(input map[string]interface{}) (map[string]interface{}, error) {
    12  	// Our template type we'll use for this fixer only
    13  	type template struct {
    14  		Builders []map[string]interface{}
    15  	}
    16  
    17  	// Decode the input into our structure, if we can
    18  	var tpl template
    19  	if err := mapstructure.Decode(input, &tpl); err != nil {
    20  		return nil, err
    21  	}
    22  
    23  	// Go through each builder and replace the iso_md5 if we can
    24  	for _, builder := range tpl.Builders {
    25  		md5raw, ok := builder["iso_md5"]
    26  		if !ok {
    27  			continue
    28  		}
    29  
    30  		md5, ok := md5raw.(string)
    31  		if !ok {
    32  			// TODO: error?
    33  			continue
    34  		}
    35  
    36  		delete(builder, "iso_md5")
    37  		builder["iso_checksum"] = md5
    38  		builder["iso_checksum_type"] = "md5"
    39  	}
    40  
    41  	input["builders"] = tpl.Builders
    42  	return input, nil
    43  }
    44  
    45  func (FixerISOMD5) Synopsis() string {
    46  	return `Replaces "iso_md5" in builders with "iso_checksum"`
    47  }