Move addSSHConnectionsToPodmanSocket code to shared file

Moves the implementation of `addSSHConnectionsToPodmanSocket` into the
common file `pkg/machine/machine_common.go`. The implementation was
shared between the hypervisors and does not need to be implemented
multiple times.

Signed-off-by: Jake Correnti <jakecorrenti+github@proton.me>

pkg/machine/machine_common.go

@@ -4,7 +4,10 @@
 package machine
 
 import (
+	"fmt"
+	"net/url"
 	"os"
+	"strconv"
 )
 
 // getDevNullFiles returns pointers to Read-only and Write-only DevNull files
@@ -24,3 +27,30 @@ func GetDevNullFiles() (*os.File, *os.File, error) {
 
 	return dnr, dnw, nil
 }
+
+// AddSSHConnectionsToPodmanSocket adds SSH connections to the podman socket if
+// no ignition path is provided
+func AddSSHConnectionsToPodmanSocket(uid, port int, identityPath, name, remoteUsername string, opts InitOptions) error {
+	if len(opts.IgnitionPath) < 1 {
+		uri := SSHRemoteConnection.MakeSSHURL(LocalhostIP, fmt.Sprintf("/run/user/%d/podman/podman.sock", uid), strconv.Itoa(port), remoteUsername)
+		uriRoot := SSHRemoteConnection.MakeSSHURL(LocalhostIP, "/run/podman/podman.sock", strconv.Itoa(port), "root")
+
+		uris := []url.URL{uri, uriRoot}
+		names := []string{name, name + "-root"}
+
+		// The first connection defined when connections is empty will become the default
+		// regardless of IsDefault, so order according to rootful
+		if opts.Rootful {
+			uris[0], names[0], uris[1], names[1] = uris[1], names[1], uris[0], names[0]
+		}
+
+		for i := 0; i < 2; i++ {
+			if err := AddConnection(&uris[i], names[i], identityPath, opts.IsDefault && i == 0); err != nil {
+				return err
+			}
+		}
+	} else {
+		fmt.Println("An ignition path was provided.  No SSH connection was added to Podman")
+	}
+	return nil
+}