mango
mango is a man-page generator for the Go flag, pflag, and cobra packages. It extracts commands, flags, and arguments from your program and enables it to self-document.
Usage with flag:
import (
"flag"
"fmt"
"github.com/muesli/mango"
"github.com/muesli/mango/mflag"
"github.com/muesli/roff"
)
var (
one = flag.String("one", "", "first value")
two = flag.String("two", "", "second value")
)
func main() {
flag.Parse()
manPage := mango.NewManPage(1, "mango", "mango - a man-page generator").
WithLongDescription("mango is a man-page generator for Go.\n"+
"Features:\n"+
"* User-friendly\n"+
"* Plugable").
WithSection("Copyright", "(C) 2022 Christian Muehlhaeuser.\n"+
"Released under MIT license.")
flag.VisitAll(mflag.FlagVisitor(manPage))
fmt.Println(manPage.Build(roff.NewDocument()))
}Mango will extract all the flags from your app and generate a man-page similar to this example:
Usage with pflag:
import (
"fmt"
"github.com/muesli/mango"
"github.com/muesli/mango/mpflag"
"github.com/muesli/roff"
flag "github.com/spf13/pflag"
)
func main() {
flag.Parse()
manPage := mango.NewManPage(1, "mango", "mango - a man-page generator").
WithLongDescription("mango is a man-page generator for Go.").
WithSection("Copyright", "(C) 2022 Christian Muehlhaeuser.\n"+
"Released under MIT license.")
flag.VisitAll(mpflag.PFlagVisitor(manPage))
fmt.Println(manPage.Build(roff.NewDocument()))
}Usage with cobra:
import (
"fmt"
"github.com/muesli/mango/mcobra"
"github.com/muesli/roff"
"github.com/spf13/cobra"
)
var (
rootCmd = &cobra.Command{
Use: "mango",
Short: "A man-page generator",
}
)
func main() {
manPage, err := mcobra.NewManPageFromCobra(1, rootCmd)
if err != nil {
panic(err)
}
manPage = manPage.WithSection("Copyright", "(C) 2022 Christian Muehlhaeuser.\n"+
"Released under MIT license.")
fmt.Println(manPage.Build(roff.NewDocument()))
}