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| 1 | +// Copyright 2025 Google LLC All Rights Reserved. |
| 2 | +// |
| 3 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +// you may not use this file except in compliance with the License. |
| 5 | +// You may obtain a copy of the License at |
| 6 | +// |
| 7 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +// |
| 9 | +// Unless required by applicable law or agreed to in writing, software |
| 10 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +// See the License for the specific language governing permissions and |
| 13 | +// limitations under the License. |
| 14 | + |
| 15 | +package mcp |
| 16 | + |
| 17 | +import ( |
| 18 | + "fmt" |
| 19 | + "os" |
| 20 | + |
| 21 | + "github.com/google/go-containerregistry/pkg/crane/mcp/tools/catalog" |
| 22 | + "github.com/google/go-containerregistry/pkg/crane/mcp/tools/config" |
| 23 | + "github.com/google/go-containerregistry/pkg/crane/mcp/tools/copy" |
| 24 | + "github.com/google/go-containerregistry/pkg/crane/mcp/tools/digest" |
| 25 | + "github.com/google/go-containerregistry/pkg/crane/mcp/tools/list" |
| 26 | + "github.com/google/go-containerregistry/pkg/crane/mcp/tools/manifest" |
| 27 | + "github.com/google/go-containerregistry/pkg/crane/mcp/tools/pull" |
| 28 | + "github.com/google/go-containerregistry/pkg/crane/mcp/tools/push" |
| 29 | + "github.com/mark3labs/mcp-go/server" |
| 30 | +) |
| 31 | + |
| 32 | +// Config contains configuration options for the MCP server. |
| 33 | +type Config struct { |
| 34 | + // Name is the server name. |
| 35 | + Name string |
| 36 | + // Version is the server version. |
| 37 | + Version string |
| 38 | +} |
| 39 | + |
| 40 | +// DefaultConfig returns the default configuration for the server. |
| 41 | +func DefaultConfig() Config { |
| 42 | + return Config{ |
| 43 | + Name: "crane-mcp", |
| 44 | + Version: "1.0.0", |
| 45 | + } |
| 46 | +} |
| 47 | + |
| 48 | +// Server is the crane MCP server. |
| 49 | +type Server struct { |
| 50 | + mcpServer *server.MCPServer |
| 51 | + config Config |
| 52 | +} |
| 53 | + |
| 54 | +// New creates a new crane MCP server. |
| 55 | +func New(cfg Config) *Server { |
| 56 | + s := &Server{ |
| 57 | + mcpServer: server.NewMCPServer(cfg.Name, cfg.Version), |
| 58 | + config: cfg, |
| 59 | + } |
| 60 | + |
| 61 | + // Register all tools |
| 62 | + s.registerTools() |
| 63 | + |
| 64 | + return s |
| 65 | +} |
| 66 | + |
| 67 | +// registerTools registers all crane tools with the MCP server. |
| 68 | +func (s *Server) registerTools() { |
| 69 | + // Register digest tool |
| 70 | + s.mcpServer.AddTool(digest.NewTool(), digest.Handle) |
| 71 | + |
| 72 | + // Register pull tool |
| 73 | + s.mcpServer.AddTool(pull.NewTool(), pull.Handle) |
| 74 | + |
| 75 | + // Register push tool |
| 76 | + s.mcpServer.AddTool(push.NewTool(), push.Handle) |
| 77 | + |
| 78 | + // Register copy tool |
| 79 | + s.mcpServer.AddTool(copy.NewTool(), copy.Handle) |
| 80 | + |
| 81 | + // Register catalog tool |
| 82 | + s.mcpServer.AddTool(catalog.NewTool(), catalog.Handle) |
| 83 | + |
| 84 | + // Register list tool |
| 85 | + s.mcpServer.AddTool(list.NewTool(), list.Handle) |
| 86 | + |
| 87 | + // Register config tool |
| 88 | + s.mcpServer.AddTool(config.NewTool(), config.Handle) |
| 89 | + |
| 90 | + // Register manifest tool |
| 91 | + s.mcpServer.AddTool(manifest.NewTool(), manifest.Handle) |
| 92 | +} |
| 93 | + |
| 94 | +// Serve starts the server with stdio. |
| 95 | +func (s *Server) Serve() error { |
| 96 | + return server.ServeStdio(s.mcpServer) |
| 97 | +} |
| 98 | + |
| 99 | +// Run starts the server and exits the program if an error occurs. |
| 100 | +func (s *Server) Run() { |
| 101 | + if err := s.Serve(); err != nil { |
| 102 | + fmt.Fprintf(os.Stderr, "Error: %v\n", err) |
| 103 | + os.Exit(1) |
| 104 | + } |
| 105 | +} |
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