56 lines
1.7 KiB
Go
56 lines
1.7 KiB
Go
package sharedcli
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import (
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"fmt"
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"strings"
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"github.com/spf13/cobra"
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cliflag "k8s.io/component-base/cli/flag"
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)
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const (
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usageFmt = "Usage:\n %s\n"
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)
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// generatesAvailableSubCommands generates command's subcommand information which
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// is usually part of a help message. E.g.:
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//
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// Available Commands:
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// karmada-controller-manager completion generate the autocompletion script for the specified shell
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// karmada-controller-manager help Help about any command
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// karmada-controller-manager version Print the version information.
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//
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func generatesAvailableSubCommands(cmd *cobra.Command) []string {
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if !cmd.HasAvailableSubCommands() {
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return nil
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}
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info := []string{"\nAvailable Commands:"}
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for _, sub := range cmd.Commands() {
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if !sub.Hidden {
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info = append(info, fmt.Sprintf(" %s %-30s %s", cmd.CommandPath(), sub.Name(), sub.Short))
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}
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}
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return info
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}
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// SetUsageAndHelpFunc set both usage and help function.
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func SetUsageAndHelpFunc(cmd *cobra.Command, fss cliflag.NamedFlagSets, cols int) {
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cmd.SetUsageFunc(func(cmd *cobra.Command) error {
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fmt.Fprintf(cmd.OutOrStderr(), usageFmt, cmd.UseLine())
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if cmd.HasAvailableSubCommands() {
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fmt.Fprintf(cmd.OutOrStderr(), "%s\n", strings.Join(generatesAvailableSubCommands(cmd), "\n"))
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}
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cliflag.PrintSections(cmd.OutOrStderr(), fss, cols)
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return nil
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})
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cmd.SetHelpFunc(func(cmd *cobra.Command, args []string) {
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fmt.Fprintf(cmd.OutOrStdout(), "%s\n\n"+usageFmt, cmd.Long, cmd.UseLine())
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if cmd.HasAvailableSubCommands() {
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fmt.Fprintf(cmd.OutOrStdout(), "%s\n", strings.Join(generatesAvailableSubCommands(cmd), "\n"))
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}
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cliflag.PrintSections(cmd.OutOrStdout(), fss, cols)
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})
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}
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