From 59df06fe28ddde3607cb3080636e65d48b762baf Mon Sep 17 00:00:00 2001
From: Stefan Rakel <rakel@embedded.rwth-aachen.de>
Date: Thu, 27 Jun 2019 11:06:50 +0200
Subject: [PATCH] Reopening mailcontent file to fix #166

Because editors like vim use backupfiles and rename them to the original
name, the file handle used can point to the wrong file. Reopening the
file should fix this.
---
 widgets/compose.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/widgets/compose.go b/widgets/compose.go
index 8fc34b4..dc12e60 100644
--- a/widgets/compose.go
+++ b/widgets/compose.go
@@ -278,7 +278,13 @@ func (c *Composer) PrepareHeader() (*mail.Header, []string, error) {
 }
 
 func (c *Composer) WriteMessage(header *mail.Header, writer io.Writer) error {
-	c.email.Seek(0, os.SEEK_SET)
+	name := c.email.Name()
+	c.email.Close()
+	file, err := os.Open(name)
+	if err != nil {
+		return errors.Wrap(err, "FileOpen")
+	}
+	c.email = file
 	var body io.Reader
 	reader, err := mail.CreateReader(c.email)
 	if err == nil {