Add ability to attach a file to the sent mail(s)

DOCS.md

@@ -13,6 +13,7 @@ You can configure the plugin using the following parameters:
 * **recipients_only** - Do not send mails to the commit author, but only to **recipients**, defaults to `false`
 * **subject** - The subject line template
 * **body** - The email body template
+* **attachment** - An optional file to attach to the sent mail(s), can be an absolute path or relative to the working directory.
 
 ## Example
 

main.go

@@ -74,6 +74,11 @@ func main() {
 			Usage:  "body template",
 			EnvVar: "PLUGIN_BODY",
 		},
+		cli.StringFlag{
+			Name:   "attachment",
+			Usage:  "attachment filename",
+			EnvVar: "PLUGIN_ATTACHMENT",
+		},
 
 		// Drone environment
 		// Repo
@@ -369,6 +374,7 @@ func run(c *cli.Context) error {
 			RecipientsOnly: c.Bool("recipients.only"),
 			Subject:        c.String("template.subject"),
 			Body:           c.String("template.body"),
+			Attachment:     c.String("attachment"),
 		},
 	}
 

plugin.go

@@ -88,6 +88,7 @@ type (
 		RecipientsOnly bool
 		Subject        string
 		Body           string
+		Attachment     string
 	}
 
 	Plugin struct {
@@ -195,6 +196,10 @@ func (p Plugin) Exec() error {
 		message.AddAlternative("text/plain", plainBody)
 		message.AddAlternative("text/html", html)
 
+		if p.Config.Attachment != "" {
+			message.Attach(p.Config.Attachment)
+		}
+
 		if err := gomail.Send(closer, message); err != nil {
 			log.Errorf("Could not send email to %q: %v", recipient, err)
 			return err