README.md

kong-bug-demo

This demonstrates an issue in the golang kong argument processing library (which, by the way, is an excellent library!)

Summary

If you have multiple subcommands, which have constrained arguments (e.g. existingdir with default values) those constraints must pass even if the subcommand is not invoked.

Kong Code

type Options struct {
	Cmd1         Subcommand1 `cmd:""`
	Cmd2         Subcommand2 `cmd:""`
}

type Subcommand1 struct {
	Dir1 string `group:"dir" help:"get a directory" type:"existingdir" default:"dir1"`
}

type Subcommand2 struct {
	Dir2 string `group:"dir" help:"get a directory" type:"existingdir" default:"dir2"`
}

Output

$ mkdir -p dir1 &&  go run main.go cmd-1 --dir-1 dir1
--dir-2: stat /Users/dsasser/personal/kong-bug-demo/dir2: no such file or directory
exit status 1

Expected Output

The expectation is that the program would run, as the constraints on the operable subcommand have been satisfied.

Note that if the default value is left off the parameters in the subcommands, the program runs as expected.