github.com/alouche/packer@v0.3.7/builder/openstack/image_config.go (about)

     1  package openstack
     2  
     3  import (
     4  	"fmt"
     5  	"github.com/mitchellh/packer/packer"
     6  )
     7  
     8  // ImageConfig is for common configuration related to creating Images.
     9  type ImageConfig struct {
    10  	ImageName string `mapstructure:"image_name"`
    11  }
    12  
    13  func (c *ImageConfig) Prepare(t *packer.ConfigTemplate) []error {
    14  	if t == nil {
    15  		var err error
    16  		t, err = packer.NewConfigTemplate()
    17  		if err != nil {
    18  			return []error{err}
    19  		}
    20  	}
    21  
    22  	templates := map[string]*string{
    23  		"image_name": &c.ImageName,
    24  	}
    25  
    26  	errs := make([]error, 0)
    27  	for n, ptr := range templates {
    28  		var err error
    29  		*ptr, err = t.Process(*ptr, nil)
    30  		if err != nil {
    31  			errs = append(
    32  				errs, fmt.Errorf("Error processing %s: %s", n, err))
    33  		}
    34  	}
    35  
    36  	if c.ImageName == "" {
    37  		errs = append(errs, fmt.Errorf("An image_name must be specified"))
    38  	}
    39  
    40  	if len(errs) > 0 {
    41  		return errs
    42  	}
    43  
    44  	return nil
    45  }