Fix file writing and replacement process

jrnlwarrior.py

@@ -35,6 +35,7 @@ def process_file(options):
     fname = options.jrnl_fname
     lines_to_delete = []
     today_exists = False
+    curdate = ""
     with open(fname) as file:
         line_number = 0
         for line in file:
@@ -190,22 +191,23 @@ def is_today(cur_date):
 
 
 def add_today(fname, options):
-    cmd = ["task", "+TODAY or +OVERDUE", "export"]
+    cmd = ["task", *options.taskwarrior_overrides, "+TODAY or +OVERDUE", "export"]
+    due_json = json.loads(subprocess.run(cmd,capture_output=True).stdout)
+
     tasks = f"[{TODAY} 09:00] {options.todo_block_title}\n"
-    for task in json.loads(subprocess.check_output(cmd)):
+    for task in due_json:
         tasks += f"{task['description']}\n"
+    tasks += "\n"
 
     if options.dryrun:
         print(f"\nWRITING TODAY:\n{tasks}")
         return
 
-    repl_file = fname + ".bak"
-    with open(fname) as read_file, open(repl_file, "w") as write_file:
-        write_file.write(tasks + "\n")
-        for line in read_file:
-            write_file.write(line)
-    os.rename(repl_file, fname)
-
+    repl_fname = fname + ".bak"
+    with open(fname, "r") as read_file, open(repl_fname, "w") as write_file:
+        write_file.write(tasks)
+        write_file.write(read_file.read())
+    os.rename(repl_fname, fname)
 
 if __name__ == "__main__":
     process_file(opts.init())