go vet
Built-in static analyzer that catches common mistakes.
Usage
bash
go vet ./... go vet ./pkg/...
Common Warnings
Printf Format Mismatch
go
// Bad
fmt.Printf("%d", "string")
// Good
fmt.Printf("%s", "string")
Unreachable Code
go
// Bad
return value
fmt.Println("never runs")
// Good
fmt.Println("runs")
return value
Composite Literal Uses Unkeyed Fields
go
// Bad
Person{"Alice", 30}
// Good
Person{Name: "Alice", Age: 30}
Nil Dereference
go
// Bad
var p *int
fmt.Println(*p)
// Good
if p != nil {
fmt.Println(*p)
}
Suspicious Mutex Usage
go
// Bad - mutex copied
func process(mu sync.Mutex) {
mu.Lock()
}
// Good - pass pointer
func process(mu *sync.Mutex) {
mu.Lock()
}
Lost Context
go
// Bad ctx := context.TODO() // Good ctx := context.Background() // or accept ctx as parameter
Fix All Issues
bash
go vet ./... 2>&1 | tee vet.log