github.com/kikitux/packer@v0.10.1-0.20160322154024-6237df566f9f/builder/parallels/common/output_config.go (about)

     1  package common
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  	"path"
     7  
     8  	"github.com/mitchellh/packer/common"
     9  	"github.com/mitchellh/packer/template/interpolate"
    10  )
    11  
    12  type OutputConfig struct {
    13  	OutputDir string `mapstructure:"output_directory"`
    14  }
    15  
    16  func (c *OutputConfig) Prepare(ctx *interpolate.Context, pc *common.PackerConfig) []error {
    17  	if c.OutputDir == "" {
    18  		c.OutputDir = fmt.Sprintf("output-%s", pc.PackerBuildName)
    19  	}
    20  
    21  	var errs []error
    22  
    23  	if path.IsAbs(c.OutputDir) {
    24  		c.OutputDir = path.Clean(c.OutputDir)
    25  	} else {
    26  		wd, err := os.Getwd()
    27  		if err != nil {
    28  			errs = append(errs, err)
    29  		}
    30  		c.OutputDir = path.Clean(path.Join(wd, c.OutputDir))
    31  	}
    32  
    33  	if !pc.PackerForce {
    34  		if _, err := os.Stat(c.OutputDir); err == nil {
    35  			errs = append(errs, fmt.Errorf(
    36  				"Output directory '%s' already exists. It must not exist.", c.OutputDir))
    37  		}
    38  	}
    39  
    40  	return errs
    41  }