/*******************************************************************************
*
* Copyright 2017 Stefan Majewsky <majewsky@gmx.net>
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*
*******************************************************************************/

package prompt

import "os"

//Exec executes the prettyprompt applet and returns an exit code (0 for
//success, >0 for error).
func Exec() int {
	var buf LineBuffer
	addLogin(&buf)

	os.Stdout.Write(buf.Bytes())
	os.Stdout.Write([]byte("\n"))
	return 0
}

func getenvOrDefault(key, defaultValue string) (value string) {
	value = os.Getenv(key)
	if value == "" {
		value = defaultValue
	}
	return
}

func handleError(err error) {
	if err != nil {
		os.Stderr.Write([]byte("\x1B[1;31mPrompt error: " + err.Error() + "\x1B[0m\n"))
	}
}