Protobuf Language Server

A language server implementation for Protocol Buffers. Under active development; some features are still a work in progress.

LSP features:

• Document Formatting
• Full semantic token support
  • (partial) Embedded CEL expression semantic tokens
• Document and workspace diagnostics
• Import links
• Find references/definition
  • Types and enums
  • Imports
  • Options, extensions, and field references
  • Inlay Hints
  • Package names and prefixes
• Hover
  • Types and enums
  • Options, extensions, and field references
  • Inlay Hints
  • Package names and prefixes
  • CEL tokens
• Code Actions & Refactors
  • Identify and remove unused imports
  • Add missing import for unresolved symbol
  • Auto-fix imports on save
  • Simplify repeated option declarations
  • Simplify repeated message literal fields
  • Simplify map literal fields
  • Extract fields to new message
  • Inline fields from message
  • Renumber message fields
• Code Lens
  • Generate file/package/workspace
• Inlay hints
  • Extension types
  • Resolved import paths
• Rename symbols
• Multi-workspace support
• Document symbols
• Workspace symbol query with fuzzy matching
• Completion:
  • Message and enum types
  • Extendee types
  • Context-sensitive keywords
  • Import paths
  • Package names
  • Message and field literals
  • Field literal values
• Import resolution
  • Local/relative paths
  • Go module path lookup with inline sources
  • Go module path lookup with missing proto sources synthesized from generated code
  • Context-sensitive imports and pattern detection
  • Import path lookup from existing generated Go code
  • Fully interactive sources generated from well-known (or any other) descriptors
• Legacy compatibility
  • gogoproto sources (k8s, etc.)
  • proto2 sources
• Future compatibility
  • Editions
• Code generator tools
  • Built-in compiler with workspace context
  • CLI support
    • 'protols fmt'
    • 'protols vet'
    • 'protols rename'
    • ...
  • Interact with generated code
    • Go to Generated Definition
    • Find references
    • Call hierarchy
    • Cross-language rename
• Debugging tools
  • AST viewer
  • Wire message decoder ('protols decode')
  • ...
• Editor support
  • VSCode
  • Neovim

Installing

1. Clone this repo
2. Build and install the protols binary: go install ./cmd/protols
3. Install vsce if you don't have it: npm install --global @vscode/vsce
4. cd to editors/vscode, then run vsce package
5. Install the vsix plugin: code --install-extension ./protols-vscode-<version>.vsix

Special Thanks

This project is derived from bufbuild/protocompile and jhump/protoreflect. Thanks to the buf developers for their fantastic work.

Several packages in https://github.com/golang/tools are used to build the language server. A minimal subset of its lsp-related packages are maintained as a library at https://github.com/kralicky/tools-lite.