apveyor, gitpython-developers#519: FIX incomplete Popen pump

+ Pump once, so when input larger than `mmap.PAGESIZE`, stream is not
emptied.

git/cmd.py

@@ -100,16 +100,16 @@ def _parse_lines_from_buffer(buf):
     # end
 
     def _read_lines_from_fno(fno, last_buf_list):
-        buf = os.read(fno, mmap.PAGESIZE)
-        buf = last_buf_list[0] + buf
+        for buf in iter(lambda: os.read(fno, mmap.PAGESIZE), ''):
+            buf = last_buf_list[0] + buf
 
-        bi = 0
-        for bi, line in _parse_lines_from_buffer(buf):
-            yield line
-        # for each line to parse from the buffer
+            bi = 0
+            for bi, line in _parse_lines_from_buffer(buf):
+                yield line
+            # for each line to parse from the buffer
 
-        # keep remainder
-        last_buf_list[0] = buf[bi:]
+            # keep remainder
+            last_buf_list[0] = buf[bi:]
 
     def _dispatch_single_line(line, handler):
         line = line.decode(defenc)
@@ -199,6 +199,7 @@ def _deplete_buffer(fno, handler, buf_list, wg=None):
         for fno, (handler, buf_list) in fdmap.items():
             wg.add(1)
             t = threading.Thread(target=lambda: _deplete_buffer(fno, handler, buf_list, wg))
+            t.setDaemon(True)
             t.start()
         # end
         # NOTE: Just joining threads can possibly fail as there is a gap between .start() and when it's

git/test/test_git.py

@@ -238,7 +238,9 @@ def counter_stderr(line):
                                 stdin=None,
                                 stdout=subprocess.PIPE,
                                 stderr=subprocess.PIPE,
-                                shell=False)
+                                shell=False,
+                                creationflags=Git.CREATE_NO_WINDOW if sys.platform == 'win32' else 0,
+                                )
 
         handle_process_output(proc, counter_stdout, counter_stderr, lambda proc: proc.wait())