use cobra for cli

reorganize a bit to be able to use it

environment/docker.go

@@ -0,0 +1,96 @@
+package environment
+
+import (
+	"context"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/network"
+	"github.com/docker/docker/client"
+	"github.com/pterodactyl/wings/config"
+	"go.uber.org/zap"
+)
+
+// Configures the required network for the docker environment.
+func ConfigureDocker(c *config.DockerConfiguration) error {
+	// Ensure the required docker network exists on the system.
+	cli, err := client.NewClientWithOpts(client.FromEnv)
+	if err != nil {
+		return err
+	}
+
+	resource, err := cli.NetworkInspect(context.Background(), c.Network.Name, types.NetworkInspectOptions{})
+	if err != nil && client.IsErrNotFound(err) {
+		zap.S().Infow("creating missing pterodactyl0 interface, this could take a few seconds...")
+		return createDockerNetwork(cli, c)
+	} else if err != nil {
+		zap.S().Fatalw("failed to create required docker network for containers", zap.Error(err))
+	}
+
+	switch resource.Driver {
+	case "host":
+		c.Network.Interface = "127.0.0.1"
+		c.Network.ISPN = false
+		return nil
+	case "overlay":
+	case "weavemesh":
+		c.Network.Interface = ""
+		c.Network.ISPN = true
+		return nil
+	default:
+		c.Network.ISPN = false
+	}
+
+	return nil
+}
+
+// Creates a new network on the machine if one does not exist already.
+func createDockerNetwork(cli *client.Client, c *config.DockerConfiguration) error {
+	_, err := cli.NetworkCreate(context.Background(), c.Network.Name, types.NetworkCreate{
+		Driver:     c.Network.Driver,
+		EnableIPv6: true,
+		Internal:   c.Network.IsInternal,
+		IPAM: &network.IPAM{
+			Config: []network.IPAMConfig{
+				{
+					Subnet:  c.Network.Interfaces.V4.Subnet,
+					Gateway: c.Network.Interfaces.V4.Gateway,
+				},
+				{
+					Subnet:  c.Network.Interfaces.V6.Subnet,
+					Gateway: c.Network.Interfaces.V6.Gateway,
+				},
+			},
+		},
+		Options: map[string]string{
+			"encryption": "false",
+			"com.docker.network.bridge.default_bridge":       "false",
+			"com.docker.network.bridge.enable_icc":           "true",
+			"com.docker.network.bridge.enable_ip_masquerade": "true",
+			"com.docker.network.bridge.host_binding_ipv4":    "0.0.0.0",
+			"com.docker.network.bridge.name":                 "pterodactyl0",
+			"com.docker.network.driver.mtu":                  "1500",
+		},
+	})
+
+	if err != nil {
+		return err
+	}
+
+	switch c.Network.Driver {
+	case "host":
+		c.Network.Interface = "127.0.0.1"
+		c.Network.ISPN = false
+		break
+	case "overlay":
+	case "weavemesh":
+		c.Network.Interface = ""
+		c.Network.ISPN = true
+		break
+	default:
+		c.Network.Interface = c.Network.Interfaces.V4.Gateway
+		c.Network.ISPN = false
+		break
+	}
+
+	return nil
+}