✨ Only add newline to file when needed

files/append.go

@@ -2,6 +2,7 @@ package files
 
 import (
 	"fmt"
+	"io"
 	"os"
 	fp "path/filepath"
 	"strings"
@@ -31,18 +32,32 @@ func Append(l models.Log) error {
 		return err
 	}
 
-	f, err := os.OpenFile(path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0640)
+	f, err := os.OpenFile(path, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0640)
 	if err != nil {
 		return err
 	}
 	defer f.Close()
 
+	f.Seek(-1, os.SEEK_END)
+	last := make([]byte, 1, 1)
+	n, err := f.Read(last)
+	if err != nil && err != io.EOF {
+		return err
+	}
+
+	if err == nil && n > 0 {
+		if last[0] != 10 {
+			f.Write([]byte{10})
+		}
+	}
+
 	for _, e := range l.Entries {
 		by, err := e.MarshalText()
 		if err != nil {
 			continue
 		}
 		f.Write(by)
+		f.Write([]byte{10})
 	}
 
 	return nil