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// Package command implements generic nested command parsing.
package command
import (
"flag"
"strings"
)
type (
// HandlerFunc is called when matching a directly handled subcommand tree.
HandlerFunc = func(args []string) error
// LogFunc is the function signature of a printf function.
LogFunc = func(format string, a ...any)
// FlagDefiner is a deferred flag definer value, usually encapsulating the default value.
FlagDefiner interface {
// Define defines the flag in set.
Define(b *strings.Builder, set *flag.FlagSet, p any, name, usage string)
}
Flag[T any] interface {
// Flag defines a generic flag type in Node's flag set.
Flag(p any, name string, value FlagDefiner, usage string) T
}
Command interface {
Parse(arguments []string) error
baseNode[Command]
}
Node baseNode[Node]
baseNode[T any] interface {
// Command appends a subcommand with direct command handling.
Command(name, usage string, f HandlerFunc) T
// New returns a new subcommand tree.
New(name, usage string) (sub Node)
// NewCommand returns a new subcommand with direct command handling.
NewCommand(name, usage string, f HandlerFunc) (sub Flag[Node])
// PrintHelp prints a help message to the configured writer.
PrintHelp()
Flag[T]
}
)
|
