Support for SSH connection

Signed-off-by: Matej Vasek <[email protected]>

cmd/cmd.go

@@ -1,7 +1,13 @@
 package cmd
 
 import (
+	"net/http"
+	"net/url"
+	"os"
+
+	dockerClient "github.com/docker/docker/client"
 	"github.com/heroku/color"
+	"github.com/matejvasek/sshdialer"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
@@ -133,7 +139,42 @@ func initConfig() (config.Config, string, error) {
 }
 
 func initClient(logger logging.Logger, cfg config.Config) (pack.Client, error) {
-	client, err := pack.NewClient(pack.WithLogger(logger), pack.WithExperimental(cfg.Experimental), pack.WithRegistryMirrors(cfg.RegistryMirrors))
+	dockerClientOpts := []dockerClient.Opt{
+		dockerClient.WithVersion("1.38"),
+	}
+
+	usesSSH := false
+	if dockerHost, ok := os.LookupEnv("DOCKER_HOST"); ok {
+		if _url, err := url.Parse(dockerHost); err == nil && _url.Scheme == "ssh" {
+			usesSSH = true
+			dialer, err := sshdialer.CreateDialContext(_url, "", "")
+			if err != nil {
+				return pack.Client{}, err
+			}
+
+			httpClient := &http.Client{
+				// No tls
+				// No proxy
+				Transport: &http.Transport{
+					DialContext: dialer,
+				},
+			}
+			dockerClientOpts = append(dockerClientOpts,
+				dockerClient.WithHTTPClient(httpClient),
+				dockerClient.WithHost("http://example.com/"),
+				dockerClient.WithDialContext(dialer),
+			)
+		}
+	}
+	if !usesSSH {
+		dockerClientOpts = append(dockerClientOpts, dockerClient.FromEnv)
+	}
+
+	dc, err := dockerClient.NewClientWithOpts(dockerClientOpts...)
+	if err != nil {
+		return pack.Client{}, err
+	}
+	client, err := pack.NewClient(pack.WithLogger(logger), pack.WithExperimental(cfg.Experimental), pack.WithRegistryMirrors(cfg.RegistryMirrors), pack.WithDockerClient(dc))
 	if err != nil {
 		return pack.Client{}, err
 	}

go.mod

@@ -15,10 +15,10 @@ require (
 	github.com/google/go-containerregistry v0.6.0
 	github.com/google/go-github/v30 v30.1.0
 	github.com/heroku/color v0.0.6
+	github.com/matejvasek/sshdialer v0.0.0-20210913130443-7a6a7b860dfe
 	github.com/mattn/go-colorable v0.1.8 // indirect
 	github.com/mitchellh/ioprogress v0.0.0-20180201004757-6a23b12fa88e
 	github.com/moby/sys/mount v0.2.0 // indirect
-	github.com/moby/term v0.0.0-20201110203204-bea5bbe245bf // indirect
 	github.com/onsi/gomega v1.16.0
 	github.com/opencontainers/image-spec v1.0.1
 	github.com/pelletier/go-toml v1.9.3