// ImageFromTemplate returns an ImageBuilder that will execute a template to
// determine what docker image should be deployed. Note that this doesn't not
// actually perform any "build".
func ImageFromTemplate(t *template.Template) ImageBuilder {
return ImageBuilderFunc(func(ctx context.Context, _ io.Writer, event events.Deployment) (image.Image, error) {
buf := new(bytes.Buffer)
if err := t.Execute(buf, event); err != nil {
return image.Image{}, err
}
return image.Decode(buf.String())
})
}
func (c *ConveyorImageBuilder) BuildImage(ctx context.Context, w io.Writer, event events.Deployment) (image.Image, error) {
a, err := c.client.Build(w, conveyor.BuildCreateOpts{
Repository: event.Repository.FullName,
Sha: &event.Deployment.Sha,
})
if err != nil {
return image.Image{}, err
}
return image.Decode(a.Image)
}
// Image returns an image.Image for the given deployment.
func Image(t string, d events.Deployment) (image.Image, error) {
if t == "" {
t = DefaultTemplate
}
tmpl, err := template.New("image").Parse(t)
if err != nil {
return image.Image{}, err
}
buf := new(bytes.Buffer)
if err := tmpl.Execute(buf, d); err != nil {
return image.Image{}, err
}
return image.Decode(buf.String())
}