From c139365a67e67330ba2d1998fcbd4370598c383a Mon Sep 17 00:00:00 2001
From: Lukas Bachschwell <lukas@lbsfilm.at>
Date: Tue, 1 Dec 2020 13:51:43 +0100
Subject: [PATCH] Add options to load recipients from file

Signed-off-by: Lukas Bachschwell <lukas@lbsfilm.at>
---
 DOCS.md   |  1 +
 main.go   |  6 ++++++
 plugin.go | 21 ++++++++++++++++++---
 3 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/DOCS.md b/DOCS.md
index cd87c77..9547c92 100644
--- a/DOCS.md
+++ b/DOCS.md
@@ -10,6 +10,7 @@ You can configure the plugin using the following parameters:
 * **password** - SMTP password
 * **skip_verify** - Skip verification of SSL certificates, defaults to `false`
 * **recipients** - List of recipients to send this mail to (besides the commit author)
+* **recipients_file** - Filename to load additional recipients from (textfile with one email per line) (besides the commit author)
 * **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
diff --git a/main.go b/main.go
index 5dee7ff..e96fd59 100644
--- a/main.go
+++ b/main.go
@@ -56,6 +56,11 @@ func main() {
 			Usage:  "skip tls verify",
 			EnvVar: "PLUGIN_SKIP_VERIFY",
 		},
+		cli.StringFlag{
+			Name:   "recipients.file",
+			Usage:  "file to read recipients from",
+			EnvVar: "EMAIL_RECIPIENTS_FILE,PLUGIN_RECIPIENTS_FILE",
+		},
 		cli.StringSliceFlag{
 			Name:   "recipients",
 			Usage:  "recipient addresses",
@@ -386,6 +391,7 @@ func run(c *cli.Context) error {
 			Password:       c.String("password"),
 			SkipVerify:     c.Bool("skip.verify"),
 			Recipients:     c.StringSlice("recipients"),
+			RecipientsFile: c.String("recipients.file"),
 			RecipientsOnly: c.Bool("recipients.only"),
 			Subject:        c.String("template.subject"),
 			Body:           c.String("template.body"),
diff --git a/plugin.go b/plugin.go
index e7bb98c..5a4045c 100644
--- a/plugin.go
+++ b/plugin.go
@@ -1,13 +1,15 @@
 package main
 
 import (
+	"bufio"
 	"crypto/tls"
+	"os"
+
 	log "github.com/Sirupsen/logrus"
 	"github.com/aymerick/douceur/inliner"
 	"github.com/drone/drone-go/template"
 	"github.com/jaytaylor/html2text"
 	"gopkg.in/gomail.v2"
-	"os"
 )
 
 type (
@@ -86,12 +88,13 @@ type (
 		Password       string
 		SkipVerify     bool
 		Recipients     []string
+		RecipientsFile string
 		RecipientsOnly bool
 		Subject        string
 		Body           string
 		Attachment     string
 		Attachments    []string
-		ClientHostname   string
+		ClientHostname string
 	}
 
 	Plugin struct {
@@ -126,6 +129,18 @@ func (p Plugin) Exec() error {
 		}
 	}
 
+	if p.Config.RecipientsFile != "" {
+		f, err := os.Open(p.Config.RecipientsFile)
+		if err == nil {
+			scanner := bufio.NewScanner(f)
+			for scanner.Scan() {
+				p.Config.Recipients = append(p.Config.Recipients, scanner.Text())
+			}
+		} else {
+			log.Errorf("Could not open RecipientsFile %s: %v", p.Config.RecipientsFile, err)
+		}
+	}
+
 	if p.Config.Username == "" && p.Config.Password == "" {
 		dialer = &gomail.Dialer{Host: p.Config.Host, Port: p.Config.Port}
 	} else {
@@ -134,7 +149,7 @@ func (p Plugin) Exec() error {
 	if p.Config.SkipVerify {
 		dialer.TLSConfig = &tls.Config{InsecureSkipVerify: true}
 	}
-  dialer.LocalName = p.Config.ClientHostname
+	dialer.LocalName = p.Config.ClientHostname
 
 	closer, err := dialer.Dial()
 	if err != nil {