How do I generate shell completions using flag in Go?

In Go, you can generate shell completions using the `flag` package along with custom commands. Below is an example illustrating how you can implement shell completion for a simple command-line application.

package main import ( "flag" "fmt" "os" "strings" ) func main() { var name string var greet bool flag.StringVar(&name, "name", "", "Name of the person to greet") flag.BoolVar(&greet, "greet", false, "Print a greeting") flag.Parse() if greet { if name == "" { fmt.Println("Hello, World!") } else { fmt.Printf("Hello, %s!\n", name) } } // Implementation for shell completions if len(os.Args) > 1 && os.Args[1] == "completion" { fmt.Println("Available commands: greet, name") os.Exit(0) } }

go shell completions flag command-line applications go flag package

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