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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016-2017 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* 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 systemd
import (
"bytes"
"fmt"
)
// Service describes a single systemd service file
type Service struct {
Description string
Type string
RemainAfterExit bool
ExecStart string
ExecStop string
Wants string
WantedBy string
After string
Before string
}
func (s *Service) unitSectionNeeded() bool {
return s.Description != "" || s.Wants != "" || s.WantedBy != "" || s.After != "" || s.Before != ""
}
func (s *Service) String() string {
var buf bytes.Buffer
if s.unitSectionNeeded() {
buf.WriteString("[Unit]\n")
}
if s.Description != "" {
fmt.Fprintf(&buf, "Description=%s\n\n", s.Description)
}
if s.Wants != "" {
fmt.Fprintf(&buf, "Wants=%s\n", s.Wants)
}
if s.WantedBy != "" {
fmt.Fprintf(&buf, "WantedBy=%s\n", s.WantedBy)
}
if s.After != "" {
fmt.Fprintf(&buf, "After=%s\n", s.After)
}
if s.Before != "" {
fmt.Fprintf(&buf, "Before=%s\n", s.Before)
}
buf.WriteString("[Service]\n")
if s.Type != "" {
fmt.Fprintf(&buf, "Type=%s\n", s.Type)
}
// "no" is the default in systemd so we don't neet to write it
if s.RemainAfterExit {
buf.WriteString("RemainAfterExit=yes\n")
}
if s.ExecStart != "" {
fmt.Fprintf(&buf, "ExecStart=%s\n", s.ExecStart)
}
if s.ExecStop != "" {
fmt.Fprintf(&buf, "ExecStop=%s\n", s.ExecStop)
}
fmt.Fprintf(&buf, "\n[Install]\nWantedBy=multi-user.target\n")
return buf.String()
}
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