packer-cn/builder/docker/config.go

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package docker
import (
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"fmt"
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"github.com/mitchellh/packer/common"
"github.com/mitchellh/packer/packer"
)
type Config struct {
common.PackerConfig `mapstructure:",squash"`
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ExportPath string `mapstructure:"export_path"`
Image string
Pull bool
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tpl *packer.ConfigTemplate
}
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func NewConfig(raws ...interface{}) (*Config, []string, error) {
c := new(Config)
md, err := common.DecodeConfig(c, raws...)
if err != nil {
return nil, nil, err
}
c.tpl, err = packer.NewConfigTemplate()
if err != nil {
return nil, nil, err
}
// Default Pull if it wasn't set
hasPull := false
for _, k := range md.Keys {
if k == "Pull" {
hasPull = true
break
}
}
if !hasPull {
c.Pull = true
}
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errs := common.CheckUnusedConfig(md)
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templates := map[string]*string{
"export_path": &c.ExportPath,
"image": &c.Image,
}
for n, ptr := range templates {
var err error
*ptr, err = c.tpl.Process(*ptr, nil)
if err != nil {
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errs = packer.MultiErrorAppend(
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errs, fmt.Errorf("Error processing %s: %s", n, err))
}
}
if c.ExportPath == "" {
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errs = packer.MultiErrorAppend(errs,
fmt.Errorf("export_path must be specified"))
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}
if c.Image == "" {
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errs = packer.MultiErrorAppend(errs,
fmt.Errorf("image must be specified"))
}
if errs != nil && len(errs.Errors) > 0 {
return nil, nil, errs
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}
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return c, nil, nil
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}