write go manifest representation

api/capability.go

@@ -0,0 +1,79 @@
+package api
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+type Capability interface {
+	ID() string
+}
+type CapabilityJSON struct {
+	Capability
+}
+type BasicCapability struct {
+	Id string `json:"id"`
+}
+
+func (c BasicCapability) ID() string {
+	return c.Id
+}
+
+const CapabilityBasic string = "basic"
+
+type DBusCapability struct {
+	Id  string   `json:"id"`
+	Own []string `json:"own,omitempty"`
+}
+
+func (c DBusCapability) ID() string {
+	return c.Id
+}
+
+const CapabilityDBus = "dbus"
+
+type capabilityType struct {
+	Type string `json:"type"`
+}
+
+func (c *CapabilityJSON) MarshalJSON() ([]byte, error) {
+	if c == nil || c.Capability == nil {
+		return nil, fmt.Errorf("invalid capability")
+	}
+	var v any
+	switch cv := c.Capability.(type) {
+	case *BasicCapability:
+		v = &struct {
+			capabilityType
+			*BasicCapability
+		}{capabilityType{CapabilityBasic}, cv}
+
+	case *DBusCapability:
+		v = &struct {
+			capabilityType
+			*DBusCapability
+		}{capabilityType{CapabilityDBus}, cv}
+
+	default:
+		return nil, fmt.Errorf("invalid capability")
+	}
+	return json.Marshal(v)
+}
+func (c *CapabilityJSON) UnmarshalJSON(data []byte) error {
+	t := new(capabilityType)
+	if err := json.Unmarshal(data, &t); err != nil {
+		return err
+	}
+	switch t.Type {
+	case CapabilityBasic:
+		*c = CapabilityJSON{new(BasicCapability)}
+
+	case CapabilityDBus:
+		*c = CapabilityJSON{new(DBusCapability)}
+
+	default:
+		return fmt.Errorf("invalid capability")
+	}
+
+	return json.Unmarshal(data, c.Capability)
+}

api/manifest.go

@@ -0,0 +1,25 @@
+package api
+
+import "hakurei.app/container/check"
+
+type Manifest struct {
+	Metadata     Metadata         `json:"metadata"`
+	Executable   Executable       `json:"executable"`
+	Capabilities []CapabilityJSON `json:"capabilities"`
+	Permissions  []CapabilityJSON `json:"permissions"`
+}
+type Metadata struct {
+	ID          string          `json:"id"`
+	Name        string          `json:"name"`
+	Description string          `json:"description"`
+	Author      string          `json:"author"`
+	Icon        *check.Absolute `json:"icon"`
+	Version     int             `json:"version"`
+	VersionName string          `json:"version_name"`
+}
+type Executable struct {
+	BaseImage string            `json:"base_image"`
+	Binary    *check.Absolute   `json:"binary"`
+	Args      []string          `json:"args"`
+	Env       map[string]string `json:"env"`
+}