in cli/config.go [55:64]
func (c *configCmd) SetFlags(fs *flag.FlagSet) {
srcs := make([]string, 0, len(config.SupportedGCRTokenSources))
for src := range config.SupportedGCRTokenSources {
srcs = append(srcs, src)
}
supportedSources := strings.Join(srcs, ", ")
defaultSources := strings.Join(config.DefaultTokenSources[:], ", ")
fs.StringVar(&c.tokenSources, tokenSourceFlag, defaultSources, "The source(s), in order, to search for credentials. Supported sources are: "+supportedSources)
fs.BoolVar(&c.resetAll, resetAllFlag, false, "Resets all settings to default")
}