gopls LSP

Go language server integration providing comprehensive code intelligence through gopls (the official Go language server).

Capabilities

• Code intelligence: Autocomplete, go-to-definition, find references
• Error detection: Real-time diagnostics for compilation errors and issues
• Refactoring: Rename symbols, extract function, organize imports
• Analysis: Static analysis, code suggestions, unused code detection
• Supported extensions: .go

Installation

Install gopls using the Go toolchain:

go install golang.org/x/tools/gopls@latest

Important: Make sure $GOPATH/bin (or $HOME/go/bin) is in your PATH.

Verify installation:

gopls version

Usage

The language server runs automatically in LSP-compatible editors. For manual operations:

Format code

gofmt -w file.go

Run linter

go vet ./...

Build and test

go build ./...
go test ./...

Configuration

Create gopls.yaml in your project or workspace for custom settings:

analyses:
  unusedparams: true
  shadow: true
completeUnimported: true
staticcheck: true

Or configure via environment:

export GOPLS_CONFIG='{"staticcheck": true, "analyses": {"unusedparams": true}}'

Integration Pattern

When editing Go code:

1. gopls provides real-time diagnostics in LSP editors
2. Run go fmt or gofmt to format code
3. Use go vet for additional static analysis
4. Run tests with go test before committing

Common Go Commands

• go mod init <module> - Initialize Go module
• go mod tidy - Clean up dependencies
• go get <package> - Add dependency
• go build - Compile packages
• go run main.go - Run program
• go test - Run tests
• go vet - Report suspicious constructs

More Information

• gopls Documentation
• GitHub Repository
• Go Official Documentation