Run BufReadFifo hook after reading from fifo

README.asciidoc

@@ -1100,6 +1100,9 @@ existing hooks are:
  * `BufWritePost`: Executed just after a buffer is written, filename is
        used for filtering.
  * `BufClose`: Executed when a buffer is deleted, while it is still valid.
+ * `BufOpenFifo`: Executed when a buffer opens a fifo.
+ * `BufReadFifo`: Executed after some data has been red from a fifo and
+       inserted in the buffer.
  * `BufCloseFifo`: Executed when a fifo buffer closes its fifo file descriptor
        either because the buffer is being deleted, or because the writing
        end has been closed.

src/buffer_utils.cc

@@ -155,6 +155,8 @@ Buffer* create_fifo_buffer(String name, int fd, bool scroll)
         while (--loops and count > 0 and
                select(fifo+1, &rfds, nullptr, nullptr, &tv) == 1);
 
+        buffer->run_hook_in_own_context("BufReadFifo", buffer->name());
+
         if (count <= 0)
             buffer->values().erase(fifo_watcher_id); // will delete this
     }), std::move(watcher_deleter));