[v3 linux] start_at_login initial implementation

v3/plugins/start_at_login/plugin_linux.go

@@ -2,15 +2,83 @@
 
 package start_at_login
 
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"text/template"
+)
+
+type startTpl struct {
+	Name    string
+	Cmd     string
+	Enabled bool
+}
+
+const tpl = `
+[Desktop Entry]
+Name={{.Name}}
+Comment=Autostart service for {{.Name}}
+Type=Application
+Exec={{.Cmd}}
+{{if .Enabled}}
+Hidden=true
+X-GNOME-Autostart-enabled=true
+{{end}}
+`
+
 func (p *Plugin) init() error {
-	// TBD
 	return nil
 }
 
+func (p *Plugin) autoStartFileExists() bool {
+	if _, err := os.Stat(p.autostartFile()); err == nil {
+		return true
+	}
+	return false
+}
+
 func (p *Plugin) StartAtLogin(enabled bool) error {
-	panic("not implemented")
+	autostart := p.autostartFile()
+	if !enabled && p.autoStartFileExists() {
+		return os.Remove(autostart)
+	} else if enabled && !p.autoStartFileExists() {
+		p.createAutoStartFile(autostart, enabled)
+	}
+
+	return nil
 }
 
 func (p *Plugin) IsStartAtLogin() (bool, error) {
-	panic("not implemented")
+	result := p.autoStartFileExists()
+	return result, nil
+}
+
+func (p Plugin) autostartFile() string {
+	homedir, _ := os.UserHomeDir()
+	exe, _ := os.Executable()
+	name := filepath.Base(exe)
+	autostartFile := fmt.Sprintf("%s-autostart.desktop", name)
+	return strings.Join([]string{homedir, ".config", "autostart", autostartFile}, "/")
+}
+
+func (p Plugin) createAutoStartFile(filename string, enabled bool) {
+	file, err := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, 0600)
+	defer file.Close()
+
+	tmpl, err := template.New("autostart").Parse(tpl)
+	if err != nil {
+		panic(err)
+	}
+	exe, _ := os.Executable()
+	input := startTpl{
+		Name:    filepath.Base(exe)	,
+		Cmd:     exe,
+		Enabled: enabled,
+	}
+	err = tmpl.Execute(file, input)
+	if err != nil {
+		panic(err)
+	}
 }