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package main
import (
"os"
"fmt"
"strings"
"text/tabwriter"
"./cli"
)
func printVersion(ctx cli.Context) {
fmt.Printf("%s v%s\n", Name, Version)
}
func printHelp(ctx cli.Context) {
w := new(tabwriter.Writer)
w.Init(os.Stdout, 0, 0, 3, ' ', 0)
fmt.Fprintf(w, "%s usage:\n\n", Name)
for _, h := range ctx.Handlers() {
fmt.Fprintf(w, "%s %s\t%s\n", Name, h.Pattern, h.Description)
}
w.Flush()
}
func printCommandHelp(ctx cli.Context) {
args := ctx.Args()
printCommandPrefixHelp(ctx, args.String("command"))
}
func printSubCommandHelp(ctx cli.Context) {
args := ctx.Args()
printCommandPrefixHelp(ctx, args.String("command"), args.String("subcommand"))
}
func printCommandPrefixHelp(ctx cli.Context, prefix ...string) {
handler := getHandler(ctx.Handlers(), prefix)
if handler == nil {
ExitF("Command not found")
}
w := new(tabwriter.Writer)
w.Init(os.Stdout, 0, 0, 3, ' ', 0)
fmt.Fprintf(w, "%s\n", handler.Description)
fmt.Fprintf(w, "%s %s\n", Name, handler.Pattern)
for _, group := range handler.FlagGroups {
fmt.Fprintf(w, "\n%s:\n", group.Name)
for _, flag := range group.Flags {
boolFlag, isBool := flag.(cli.BoolFlag)
if isBool && boolFlag.OmitValue {
fmt.Fprintf(w, " %s\t%s\n", strings.Join(flag.GetPatterns(), ", "), flag.GetDescription())
} else {
fmt.Fprintf(w, " %s <%s>\t%s\n", strings.Join(flag.GetPatterns(), ", "), flag.GetName(), flag.GetDescription())
}
}
}
w.Flush()
}
func getHandler(handlers []*cli.Handler, prefix []string) *cli.Handler {
for _, h := range handlers {
pattern := stripOptionals(h.SplitPattern())
if len(prefix) > len(pattern) {
continue
}
if equal(prefix, pattern[:len(prefix)]) {
return h
}
}
return nil
}
// Strip optional groups (<...>) from pattern
func stripOptionals(pattern []string) []string {
newArgs := []string{}
for _, arg := range pattern {
if strings.HasPrefix(arg, "[") && strings.HasSuffix(arg, "]") {
continue
}
newArgs = append(newArgs, arg)
}
return newArgs
}
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