mirror of
https://github.com/rclone/rclone.git
synced 2024-12-04 22:34:48 +01:00
99 lines
2.6 KiB
Go
99 lines
2.6 KiB
Go
|
package cobra
|
||
|
|
||
|
import (
|
||
|
"fmt"
|
||
|
)
|
||
|
|
||
|
type PositionalArgs func(cmd *Command, args []string) error
|
||
|
|
||
|
// Legacy arg validation has the following behaviour:
|
||
|
// - root commands with no subcommands can take arbitrary arguments
|
||
|
// - root commands with subcommands will do subcommand validity checking
|
||
|
// - subcommands will always accept arbitrary arguments
|
||
|
func legacyArgs(cmd *Command, args []string) error {
|
||
|
// no subcommand, always take args
|
||
|
if !cmd.HasSubCommands() {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// root command with subcommands, do subcommand checking
|
||
|
if !cmd.HasParent() && len(args) > 0 {
|
||
|
return fmt.Errorf("unknown command %q for %q%s", args[0], cmd.CommandPath(), cmd.findSuggestions(args[0]))
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// NoArgs returns an error if any args are included
|
||
|
func NoArgs(cmd *Command, args []string) error {
|
||
|
if len(args) > 0 {
|
||
|
return fmt.Errorf("unknown command %q for %q", args[0], cmd.CommandPath())
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// OnlyValidArgs returns an error if any args are not in the list of ValidArgs
|
||
|
func OnlyValidArgs(cmd *Command, args []string) error {
|
||
|
if len(cmd.ValidArgs) > 0 {
|
||
|
for _, v := range args {
|
||
|
if !stringInSlice(v, cmd.ValidArgs) {
|
||
|
return fmt.Errorf("invalid argument %q for %q%s", v, cmd.CommandPath(), cmd.findSuggestions(args[0]))
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
func stringInSlice(a string, list []string) bool {
|
||
|
for _, b := range list {
|
||
|
if b == a {
|
||
|
return true
|
||
|
}
|
||
|
}
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
// ArbitraryArgs never returns an error
|
||
|
func ArbitraryArgs(cmd *Command, args []string) error {
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// MinimumNArgs returns an error if there is not at least N args
|
||
|
func MinimumNArgs(n int) PositionalArgs {
|
||
|
return func(cmd *Command, args []string) error {
|
||
|
if len(args) < n {
|
||
|
return fmt.Errorf("requires at least %d arg(s), only received %d", n, len(args))
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// MaximumNArgs returns an error if there are more than N args
|
||
|
func MaximumNArgs(n int) PositionalArgs {
|
||
|
return func(cmd *Command, args []string) error {
|
||
|
if len(args) > n {
|
||
|
return fmt.Errorf("accepts at most %d arg(s), received %d", n, len(args))
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// ExactArgs returns an error if there are not exactly n args
|
||
|
func ExactArgs(n int) PositionalArgs {
|
||
|
return func(cmd *Command, args []string) error {
|
||
|
if len(args) != n {
|
||
|
return fmt.Errorf("accepts %d arg(s), received %d", n, len(args))
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// RangeArgs returns an error if the number of args is not within the expected range
|
||
|
func RangeArgs(min int, max int) PositionalArgs {
|
||
|
return func(cmd *Command, args []string) error {
|
||
|
if len(args) < min || len(args) > max {
|
||
|
return fmt.Errorf("accepts between %d and %d arg(s), received %d", min, max, len(args))
|
||
|
}
|
||
|
return nil
|
||
|
}
|
||
|
}
|