我正在尝试编写erlang第一个应用程序。它有 https://github.com/emedia-project/erlffmpeg在deps中，我几乎有 相同的Makefile。
当我在erlffmpeg dir和eval README中运行erlang shell时
好的，一切都好。但是当我从我的项目的目录中做到这一点时，我得到了错误
喜欢：#!/usr/bin/env python
# -*- coding: utf-8 -*-
import signal
import logging
from functools import partial
from multiprocessing import Process, Queue
from threading import Thread
from time import sleep
logger = logging.getLogger("mepy-client")
class SocketClientProtocol(object):
def __init__(self, q_in, q_out, q_binary):
self.q_in = q_in
self.q_out = q_out
self.q_binary = q_binary
self.running = True
t = Thread(target=self._loop)
t.start()
t = Thread(target=self._loop_binary)
t.start()
def _loop(self):
print("start of loop 2")
for res in iter(self.q_in.get, None):
self._handle_msg(res)
print("end of loop 2")
def _loop_binary(self):
print("start of loop 3")
for res in iter(self.q_binary.get, None):
self._handle_binary(res)
print("end of loop 3")
def _handle_msg(self, msg):
msg_type = msg[0]
if msg_type == "stop2":
self.q_in.put(None)
self.q_binary.put(None)
def _put_msg(self, msg):
self.q_out.put(msg)
def stop(self):
print("STOP RECEIVED")
self.running = False
self.q_in.put(None)
self.q_binary.put(None)
def _handle_binary(self, data):
pass
def handle_element(self):
self._put_msg(["something"])
def run_twisted(q_in, q_out, q_binary):
s = SocketClientProtocol(q_in, q_out, q_binary)
signal.signal(signal.SIGINT, partial(signal_handler_child, s))
while s.running:
sleep(2)
s.handle_element()
class MediatorSender(object):
def __init__(self):
self.q_in = None
self.q_out = None
self.q_binary = None
self.p = None
self.running = False
def start(self):
if self.running:
return
self.running = True
self.q_in = Queue()
self.q_out = Queue()
self.q_binary = Queue()
print("!!!!START")
self.p = Process(target=run_twisted,
args=(self.q_in, self.q_out, self.q_binary))
self.p.start()
self.loop = Thread(target=self._loop)
self.loop.start()
def stop(self):
print("!!!!STOP")
if not self.running:
return
print("STOP2")
self.running = False
self.q_out.put(None)
def _loop(self):
print("start of loop 1")
for res in iter(self.q_out.get, None):
self._handle_msg(res)
print("end of loop 1")
def _handle_msg(self, msg):
self._put_msg(msg)
def _put_msg(self, msg):
self.q_in.put(msg)
def _put_binary(self, msg):
self.q_binary.put(msg)
def send_chunk(self, chunk):
self._put_binary(chunk)
def signal_handler_main(ms, *args):
ms.stop()
def signal_handler_child(s, *args):
s.stop()
if __name__ == "__main__":
ms = MediatorSender()
signal.signal(signal.SIGINT, partial(signal_handler_main, ms))
ms.start()
for i in range(100):
ms.send_chunk("some chunk of data")
while ms.loop.is_alive():
ms.loop.join(9999999)
print('done main')
。所以，我的erl shell从ffmpeg看到了fns
模块，但当我尝试评估这个fns时，似乎shell不知道
关于ffmpeg的继承权。
我使用ucp detect undef命令运行erl shell。简而言之，它make dev
似乎我错过了一些关于模块加载的知识。 我应该怎么做以及你建议我阅读什么？
谢谢！
答案 0 :(得分：2)
所以，答案是使用rebar并设置代码如：
{deps, [
{ffmpeg, ".*", {git, "https://github.com/emedia-project/erlffmpeg", "master"}}
]}.
在这种情况下，rebar将自动下载根deps文件夹中的所有iner依赖项，因此带有erl -pa ebin deps/*/ebin命令的shell将挂接所有.beam个文件。
非常感谢友好的#erlang成员。