Add a note and message on waiting on input from stdin

README.md

@@ -37,6 +37,7 @@
 - [Related projects](#related-projects)
 - [Mentions](#mentions)
 - [Examples](#examples)
+- [Known issues](#known-issues)
 - [Collaborators](#collaborators)
 
 ### Introduction
@@ -487,6 +488,12 @@ NOTE: This flexibility is not exposed in the program.
         $ buku -h
         $ man buku
 
+### Known issues
+
+1. `buku` waits until its input is closed when not started in a tty. For example, the following hangs:
+
+        $ cat | buku
+
 ### Collaborators
 
 - [Arun Prakash Jana](https://github.com/jarun)

buku.py

@@ -2520,6 +2520,7 @@ def setup_logger(logger):
 def piped_input(argv, pipeargs=None):
     if not sys.stdin.isatty():
         pipeargs += argv
+        print('waiting for input')
         for s in sys.stdin.readlines():
             pipeargs += s.split()