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Golang / GoLang Production Patterns and Web Standards Interview Questions

What linters and static analysis tools are essential for production Go code quality?

Go has excellent static analysis tooling built into the ecosystem. Combining multiple linters via golangci-lint catches common bugs, style violations, and security issues before code review.

Key Go Linters and Tools
ToolPurpose
go vetBuilt-in: detects suspicious code (Printf format mismatches, unreachable code, mutex copies)
staticcheckAdvanced bug detection: deprecated API use, logic errors go vet misses
errcheckEnsures error return values are not silently ignored
golangci-lintMeta-linter runner: runs 50+ linters with one command and config
govulncheckSecurity: finds known CVEs in dependencies
gofmt / goimportsCode formatting and import organisation — non-negotiable in CI
goleakTest helper: detects goroutine leaks after test completion
shadowDetects variable shadowing that can hide bugs
# .golangci.yml — typical production configuration
linters:
  enable:
    - govet          # static analysis
    - errcheck       # unchecked errors
    - staticcheck    # advanced analysis
    - gosec          # security issues
    - misspell       # spelling errors in comments/strings
    - gofmt          # formatting
    - goimports      # import ordering
    - revive         # style and best practices
    - prealloc       # suggest slice pre-allocation
    - noctx          # HTTP requests without context

linters-settings:
  errcheck:
    check-type-assertions: true  # flag unchecked type assertions too

# Run:
# golangci-lint run ./...
# govulncheck ./...

# CI pipeline minimum:
# 1. go build ./...
# 2. go vet ./...
# 3. golangci-lint run ./...
# 4. go test -race -count=1 ./...
# 5. govulncheck ./...

What does the 'errcheck' linter detect?
What does govulncheck do in a Go project?

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