maildir,notmuch: avoid leaking open files

Previously, Message.NewReader returned the wrapped buffered reader
without a reference to the opened file, so the files descriptors
were left unclosed after reading.  Now, the file reader is returned
directly and closed on the call site.  Buffering is not needed here
because it is an implementation detail of go-message.

Fixes: https://todo.sr.ht/~rjarry/aerc/9

1 files changed, 2 insertions, 7 deletions

diff --git a/worker/maildir/message.go b/worker/maildir/message.go
index dbc9ade1..b73e0832 100644
--- a/worker/maildir/message.go
+++ b/worker/maildir/message.go
@@ -1,7 +1,6 @@
 package maildir
 
 import (
-	"bufio"
 	"fmt"
 	"io"
 
@@ -20,12 +19,8 @@ type Message struct {
 }
 
 // NewReader reads a message into memory and returns an io.Reader for it.
-func (m Message) NewReader() (io.Reader, error) {
-	f, err := m.dir.Open(m.key)
-	if err != nil {
-		return nil, err
-	}
-	return bufio.NewReader(f), nil
+func (m Message) NewReader() (io.ReadCloser, error) {
+	return m.dir.Open(m.key)
 }
 
 // Flags fetches the set of flags currently applied to the message.