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package complete
type Commands map[string]Command
type Flags map[string]FlagOptions
type Command struct {
Sub Commands
Flags Flags
}
// options returns all available complete options for the given command
// args are all except the last command line arguments relevant to the command
func (c *Command) options(args []string) (options []Option, only bool) {
// remove the first argument, which is the command name
args = args[1:]
// if prev has something that needs to follow it,
// it is the most relevant completion
if options, ok := c.Flags[last(args)]; ok && options.HasFollow {
return options.follows(), true
}
sub, options, only := c.searchSub(args)
if only {
return
}
// if no subcommand was entered in any of the args, add the
// subcommands as complete options.
if sub == "" {
options = append(options, c.subCommands()...)
}
// add global available complete options
for flag := range c.Flags {
options = append(options, Arg(flag))
}
return
}
func (c *Command) searchSub(args []string) (sub string, all []Option, only bool) {
for i, arg := range args {
if cmd, ok := c.Sub[arg]; ok {
sub = arg
all, only = cmd.options(args[i:])
return
}
}
return "", nil, false
}
func (c *Command) subCommands() []Option {
subs := make([]Option, 0, len(c.Sub))
for sub := range c.Sub {
subs = append(subs, Arg(sub))
}
return subs
}
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