Add manifest apply command to generate server and webapp manifest files

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

manifest.go

@@ -2,15 +2,97 @@ package pluginctl
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
+	"os"
 	"path/filepath"
 	"text/template"
+
+	"github.com/mattermost/mattermost/server/public/model"
 )
 
+const (
+	// File permissions for generated directories and files.
+	manifestDirPerm  = 0o750
+	manifestFilePerm = 0o600
+)
+
+const pluginIDGoFileTemplate = `// This file is automatically generated. Do not modify it manually.
+
+package main
+
+import (
+	"encoding/json"
+	"strings"
+
+	"github.com/mattermost/mattermost/server/public/model"
+)
+
+var manifest *model.Manifest
+
+const manifestStr = ` + "`%s`" + `
+
+func init() {
+	_ = json.NewDecoder(strings.NewReader(manifestStr)).Decode(&manifest)
+}
+`
+
+const pluginIDJSFileTemplate = `// This file is automatically generated. Do not modify it manually.
+
+const manifest = JSON.parse(` + "`%s`" + `);
+
+export default manifest;
+`
+
+// applyManifest generates manifest files for server and webapp components.
+func applyManifest(manifest *model.Manifest, pluginPath string) error {
+	manifestBytes, err := json.Marshal(manifest)
+	if err != nil {
+		return fmt.Errorf("failed to marshal manifest: %w", err)
+	}
+	manifestStr := string(manifestBytes)
+
+	// Generate server manifest file if server exists
+	if HasServerCode(manifest) {
+		serverDir := filepath.Join(pluginPath, "server")
+		if err := os.MkdirAll(serverDir, manifestDirPerm); err != nil {
+			return fmt.Errorf("failed to create server directory: %w", err)
+		}
+
+		serverManifestPath := filepath.Join(serverDir, "manifest.go")
+		serverContent := fmt.Sprintf(pluginIDGoFileTemplate, manifestStr)
+
+		if err := os.WriteFile(serverManifestPath, []byte(serverContent), manifestFilePerm); err != nil {
+			return fmt.Errorf("failed to write server manifest: %w", err)
+		}
+
+		Logger.Info("Generated server manifest", "path", serverManifestPath)
+	}
+
+	// Generate webapp manifest file if webapp exists
+	if HasWebappCode(manifest) {
+		webappDir := filepath.Join(pluginPath, "webapp", "src")
+		if err := os.MkdirAll(webappDir, manifestDirPerm); err != nil {
+			return fmt.Errorf("failed to create webapp directory: %w", err)
+		}
+
+		webappManifestPath := filepath.Join(webappDir, "manifest.ts")
+		webappContent := fmt.Sprintf(pluginIDJSFileTemplate, manifestStr)
+
+		if err := os.WriteFile(webappManifestPath, []byte(webappContent), manifestFilePerm); err != nil {
+			return fmt.Errorf("failed to write webapp manifest: %w", err)
+		}
+
+		Logger.Info("Generated webapp manifest", "path", webappManifestPath)
+	}
+
+	return nil
+}
+
 // RunManifestCommand implements the 'manifest' command functionality with subcommands.
 func RunManifestCommand(args []string, pluginPath string) error {
 	if len(args) == 0 {
-		return fmt.Errorf("manifest command requires a subcommand: get {{.field_name}}, check")
+		return fmt.Errorf("manifest command requires a subcommand: get {{.field_name}}, apply, check")
 	}
 
 	// Convert to absolute path
@@ -45,6 +127,10 @@ func RunManifestCommand(args []string, pluginPath string) error {
 		}
 
 		fmt.Print(buf.String())
+	case "apply":
+		if err := applyManifest(manifest, absPath); err != nil {
+			return fmt.Errorf("failed to apply manifest: %w", err)
+		}
 	case "check":
 		if err := manifest.IsValid(); err != nil {
 			Logger.Error("Plugin manifest validation failed", "error", err)
@@ -53,7 +139,8 @@ func RunManifestCommand(args []string, pluginPath string) error {
 		}
 		Logger.Info("Plugin manifest is valid")
 	default:
-		return fmt.Errorf("unknown subcommand: %s. Available subcommands: get {{.field_name}}, check", subcommand)
+		return fmt.Errorf("unknown subcommand: %s. Available subcommands: get {{.field_name}}, apply, check",
+			subcommand)
 	}
 
 	return nil