[tool] Add basic timer

timer.py

@@ -0,0 +1,28 @@
+#!/usr/bin/python
+
+import argparse
+import os
+import time
+
+TIMER_FILE = '/home/kleph/stream/timer.txt'
+
+parser = argparse.ArgumentParser()
+parser.add_argument('-t', '--timer', help="start time in seconds", type=int, default=300)
+parser.add_argument('-f', '--file', help="where to write the time", type=str, default=TIMER_FILE)
+args = parser.parse_args()
+
+
+def write_countdown(filename, stimer):
+    t = stimer
+    with open(filename, 'w') as f:
+        while t > 0:
+            t -= 1
+            min, sec = divmod(t, 60)
+            print(f'{min:02d}:{sec:02d}')
+            f.seek(0)
+            f.write(f'{min:02d}:{sec:02d}')
+            os.fsync(f)
+            time.sleep(1)
+
+
+write_countdown(args.file, args.timer)