mirror of https://github.com/knative/func.git
60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
package docker
|
|
|
|
import (
|
|
"bytes"
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"os/exec"
|
|
|
|
"github.com/boson-project/faas"
|
|
)
|
|
|
|
// Pusher of images from local to remote registry.
|
|
type Pusher struct {
|
|
// Verbose logging.
|
|
Verbose bool
|
|
}
|
|
|
|
// NewPusher creates an instance of a docker-based image pusher.
|
|
func NewPusher() *Pusher {
|
|
return &Pusher{}
|
|
}
|
|
|
|
// Push the image of the Function.
|
|
func (n *Pusher) Push(f faas.Function) (err error) {
|
|
// Check for the docker binary explicitly so that we can return
|
|
// an extra-friendly error message.
|
|
_, err = exec.LookPath("docker")
|
|
if err != nil {
|
|
err = errors.New("please install 'docker'")
|
|
return
|
|
}
|
|
|
|
if f.Image == "" {
|
|
return errors.New("Function has no associated image. Has it been built?")
|
|
}
|
|
|
|
// set up the command, specifying a sanitized project name and connecting
|
|
// standard output and error.
|
|
cmd := exec.Command("docker", "push", f.Image)
|
|
|
|
// If verbose logging is enabled, echo chatty stdout.
|
|
if n.Verbose {
|
|
fmt.Println(cmd)
|
|
cmd.Stdout = os.Stdout
|
|
}
|
|
|
|
// Capture stderr for echoing on failure.
|
|
var stderr bytes.Buffer
|
|
cmd.Stderr = &stderr
|
|
|
|
// Run the command, echoing captured stderr as well ass the cmd internal error.
|
|
err = cmd.Run()
|
|
if err != nil {
|
|
// TODO: sanitize stderr from docker?
|
|
err = fmt.Errorf("%v. %v", stderr.String(), err.Error())
|
|
}
|
|
return
|
|
}
|