// GetCommands returns a keeper for the commands based on given mode and regular expression.
// varargs is the auxiliary list of numbers which makes sense in the context of GetCommandsMode setting
// only.
func GetCommands(mode GetCommandsMode, filter *utils.Regexp, env *environments.Environment, varargs ...int) (commands Keeper, err error) {
keeper := getKeeper(mode, varargs...)
resultChan, consumeChan := processHistories(env)
parser := getParser(env)
histFileName, err := env.GetHistFileName()
if err != nil {
return
}
file := utils.Open(histFileName)
defer file.Close()
scanner := bufio.NewScanner(file)
commands, err = parser(keeper, scanner, filter, consumeChan)
if err == nil {
<-resultChan
return commands, nil
}
return
}
