func BuildContext(driver, root string) (*Context, error) {
d, err := graphdriver.GetDriver(driver, root, nil)
if err != nil {
return nil, err
}
s, err := store.New(root, d)
if err != nil {
return nil, err
}
return NewContext(s, d), nil
}
func main() {
usage := `Pinkerton manages Docker images.
Usage:
pinkerton pull [options] <image-url>
pinkerton checkout [options] <id> <image-id>
pinkerton cleanup [options] <id>
pinkerton -h | --help
Commands:
pull Download a Docker image
checkout Create a working copy of an image
cleanup Destroy a working copy of an image
Examples:
pinkerton pull https://registry.hub.docker.com/redis
pinkerton pull https://registry.hub.docker.com/ubuntu?tag=trusty
pinkerton pull https://registry.hub.docker.com/flynn/slugrunner?id=1443bd6a675b959693a1a4021d660bebbdbff688d00c65ff057c46702e4b8933
pinkerton checkout slugrunner-test 1443bd6a675b959693a1a4021d660bebbdbff688d00c65ff057c46702e4b8933
pinkerton cleanup slugrunner-test
Options:
-h, --help show this message and exit
--driver=<name> storage driver [default: aufs]
--root=<path> storage root [default: /var/lib/docker]
--json emit json-formatted output
`
args, _ := docopt.Parse(usage, nil, true, "", false)
root := args.String["--root"]
driver, err := graphdriver.GetDriver(args.String["--driver"], root, nil)
if err != nil {
log.Fatal(err)
}
s, err := store.New(root, driver)
if err != nil {
log.Fatal(err)
}
ctx := &Context{Store: s, driver: driver, json: args.Bool["--json"]}
switch {
case args.Bool["pull"]:
ctx.Pull(args.String["<image-url>"])
case args.Bool["checkout"]:
ctx.Checkout(args.String["<id>"], args.String["<image-id>"])
case args.Bool["cleanup"]:
ctx.Cleanup(args.String["<id>"])
}
}