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https://github.com/moby/moby.git
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08f0f1ee1d
Removed redundant print line and fixed handling of command-less docker invocation. Signed-off-by: Michal Minar <miminar@redhat.com>
38 lines
945 B
Go
38 lines
945 B
Go
package utils
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import (
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"fmt"
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"os"
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flag "github.com/docker/docker/pkg/mflag"
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)
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// ParseFlags is a utility function that adds a help flag if withHelp is true,
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// calls cmd.Parse(args) and prints a relevant error message if there are incorrect number of arguments.
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// TODO: move this to a better package than utils
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func ParseFlags(cmd *flag.FlagSet, args []string, withHelp bool) error {
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var help *bool
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if withHelp {
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help = cmd.Bool([]string{"#help", "-help"}, false, "Print usage")
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}
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if err := cmd.Parse(args); err != nil {
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return err
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}
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if help != nil && *help {
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cmd.Usage()
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// just in case Usage does not exit
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os.Exit(0)
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}
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if str := cmd.CheckArgs(); str != "" {
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if withHelp {
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if os.Args[0] == cmd.Name() {
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str += ". See '" + os.Args[0] + " --help'"
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} else {
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str += ". See '" + os.Args[0] + " " + cmd.Name() + " --help'"
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}
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}
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fmt.Fprintf(cmd.Out(), "docker: %s.\n", str)
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os.Exit(1)
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}
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return nil
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}
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