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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| package cmdutils | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
| "unicode" | ||
|
|
||
| "github.com/spf13/cobra" | ||
| "github.com/spf13/pflag" | ||
| ) | ||
|
|
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| // Grouping holds a superset of all flagsets for all commands | ||
| type Grouping struct { | ||
| groups map[*cobra.Command]*NamedFlagSetGroup | ||
| } | ||
|
|
||
| type namedFlagSet struct { | ||
| name string | ||
| fs *pflag.FlagSet | ||
| } | ||
|
|
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| // NamedFlagSetGroup holds a single group of flagsets | ||
| type NamedFlagSetGroup struct { | ||
| list []namedFlagSet | ||
| } | ||
|
|
||
| // NewGrouping creates an instance of Grouping | ||
| func NewGrouping() *Grouping { | ||
| return &Grouping{ | ||
| make(map[*cobra.Command]*NamedFlagSetGroup), | ||
| } | ||
| } | ||
|
|
||
| // New creates a new group of flagsets for use with a subcommand | ||
| func (g *Grouping) New(cmd *cobra.Command) *NamedFlagSetGroup { | ||
| n := &NamedFlagSetGroup{} | ||
| g.groups[cmd] = n | ||
| return n | ||
| } | ||
|
|
||
| // InFlagSet returs new or existing named GlagSet in a group | ||
| func (n *NamedFlagSetGroup) InFlagSet(name string, cb func(*pflag.FlagSet)) { | ||
| for _, nfs := range n.list { | ||
| if nfs.name == name { | ||
| cb(nfs.fs) | ||
| return | ||
| } | ||
| } | ||
|
|
||
| nfs := namedFlagSet{ | ||
| name: name, | ||
| fs: &pflag.FlagSet{}, | ||
| } | ||
| cb(nfs.fs) | ||
| n.list = append(n.list, nfs) | ||
| } | ||
|
|
||
| // AddTo mixes all flagsets in the given group into another flagset | ||
| func (n *NamedFlagSetGroup) AddTo(cmd *cobra.Command) { | ||
| for _, nfs := range n.list { | ||
| cmd.Flags().AddFlagSet(nfs.fs) | ||
| } | ||
| } | ||
|
|
||
| // Usage is for use with (*cobra.Command).SetUsageFunc | ||
| func (g *Grouping) Usage(cmd *cobra.Command) error { | ||
| if cmd == nil { | ||
| return fmt.Errorf("nil command") | ||
| } | ||
|
|
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| group := g.groups[cmd] | ||
|
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| usage := []string{fmt.Sprintf("Usage: %s", cmd.UseLine())} | ||
|
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| if cmd.HasAvailableSubCommands() { | ||
| usage = append(usage, "\nCommands:") | ||
| for _, subCommand := range cmd.Commands() { | ||
| usage = append(usage, fmt.Sprintf(" %s %-10s %s", cmd.CommandPath(), subCommand.Name(), subCommand.Short)) | ||
| } | ||
| } | ||
|
|
||
| if len(cmd.Aliases) > 0 { | ||
| usage = append(usage, "\nAliases: "+cmd.NameAndAliases()) | ||
| } | ||
|
|
||
| if group != nil { | ||
| for _, nfs := range group.list { | ||
| usage = append(usage, fmt.Sprintf("\n%s flags:", nfs.name)) | ||
| usage = append(usage, strings.TrimRightFunc(nfs.fs.FlagUsages(), unicode.IsSpace)) | ||
| } | ||
| } | ||
|
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||
| usage = append(usage, "\nCommon flags:") | ||
| if len(cmd.PersistentFlags().FlagUsages()) != 0 { | ||
| usage = append(usage, strings.TrimRightFunc(cmd.PersistentFlags().FlagUsages(), unicode.IsSpace)) | ||
| } | ||
| if len(cmd.InheritedFlags().FlagUsages()) != 0 { | ||
| usage = append(usage, strings.TrimRightFunc(cmd.InheritedFlags().FlagUsages(), unicode.IsSpace)) | ||
| } | ||
|
|
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| usage = append(usage, fmt.Sprintf("\nUse '%s [command] --help' for more information about a command.\n", cmd.CommandPath())) | ||
|
|
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| cmd.Println(strings.Join(usage, "\n")) | ||
|
|
||
| return nil | ||
| } |
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