Multiplex http and ssh ports

internal/dis/component/binder/binder.go

@@ -0,0 +1,88 @@
+package binder
+
+import (
+	"bytes"
+	"embed"
+	"io"
+	"path/filepath"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
+	"github.com/tkw1536/pkglib/yamlx"
+	"gopkg.in/yaml.v3"
+)
+
+type Binder struct {
+	component.Base
+}
+
+var (
+	_ component.Installable = (*Binder)(nil)
+)
+
+func (binder *Binder) Path() string {
+	return filepath.Join(binder.Still.Config.Paths.Root, "core", "binder")
+}
+
+func (binder *Binder) Context(parent component.InstallationContext) component.InstallationContext {
+	return parent
+}
+
+//go:embed docker-compose.yml
+var composeTemplate []byte
+
+func (binder *Binder) buildYML() ([]byte, error) {
+	var dockerCompose yaml.Node
+	if err := yaml.Unmarshal(composeTemplate, &dockerCompose); err != nil {
+		return nil, err
+	}
+
+	for dockerCompose.Kind == yaml.DocumentNode {
+		dockerCompose = *dockerCompose.Content[0]
+	}
+
+	{
+		ports := binder.Config.Listen.ComposePorts("8000")
+		portsNode, err := yamlx.Marshal(ports)
+		if err != nil {
+			return nil, err
+		}
+		if err := yamlx.Replace(&dockerCompose, *portsNode, "services", "binder", "ports"); err != nil {
+			return nil, err
+		}
+	}
+
+	{
+		command := binder.Config.HTTP.TCPMuxCommand("0.0.0.0:8000", "http:80", "http:443", "ssh:2222")
+		commandNode, err := yamlx.Marshal(command)
+		if err != nil {
+			return nil, err
+		}
+		if err := yamlx.Replace(&dockerCompose, *commandNode, "services", "binder", "command"); err != nil {
+			return nil, err
+		}
+	}
+
+	// do the final marshal
+	return yaml.Marshal(dockerCompose)
+}
+
+//go:embed binder.env
+var resources embed.FS
+
+func (binder *Binder) Stack() component.StackWithResources {
+	return component.MakeStack(binder, component.StackWithResources{
+		Resources: resources,
+		EnvPath:   "binder.env",
+		ReadComposeFile: func() (io.Reader, error) {
+			data, err := binder.buildYML()
+			if err != nil {
+				return nil, err
+			}
+			return bytes.NewReader(data), nil
+		},
+
+		EnvContext: map[string]string{
+			"DOCKER_NETWORK_NAME": binder.Config.Docker.Network,
+		},
+	})
+}