Rebar3 +牛仔内核PID已终止

Question

我安装了rebar3并创建了一个新的发行版

cd ~/apps rebar3 new release tunnel

然后

我将我的src文件从~/tunnel/src/*复制到~/apps/tunnel/src/

我在使用rebar3 run时遇到了编译错误，并发现Erlang "Kernel pid terminated" error是一种可能的解决方案。我将有关tunnel_app的所有内容都重命名为tunnel。所以我的src包含tunnel.erl、tunnel.app.src和tunnel_sup.erl。我根据需要重命名了模块定义。

下面是rebar3 run错误：

~/apps/tunnel:.rebar3 run
===> Verifying dependencies...
===> Compiling tunnel
===> Starting relx build process ...
===> Resolving OTP Applications from directories:
          /Users/quantum/apps/tunnel/_build/default/lib
          /Users/quantum/apps/tunnel/apps
          /usr/local/Cellar/erlang/19.2/lib/erlang/lib
          /Users/quantum/apps/tunnel/_build/default/rel
===> Resolved tunnel-0.1.0
===> Dev mode enabled, release will be symlinked
===> release successfully created!
readlink: illegal option -- f
usage: readlink [-n] [file ...]
Exec: /usr/local/Cellar/erlang/19.2/lib/erlang/erts-8.2/bin/erlexec -boot /Users/quantum/apps/tunnel/_build/default/rel/tunnel/releases/0.1.0/tunnel -mode embedded -boot_var ERTS_LIB_DIR /usr/local/Cellar/erlang/19.2/lib/erlang/lib -config /Users/quantum/apps/tunnel/_build/default/rel/tunnel/releases/0.1.0/sys.config -args_file /Users/quantum/apps/tunnel/_build/default/rel/tunnel/releases/0.1.0/vm.args -pa -- console
Root: /Users/quantum/apps/tunnel/_build/default/rel/tunnel
/Users/quantum/apps/tunnel/_build/default/rel/tunnel
Erlang/OTP 19 [erts-8.2] [source] [64-bit] [smp:8:8] [async-threads:30] [hipe] [kernel-poll:true] [dtrace]


=INFO REPORT==== 16-Feb-2017::15:02:21 ===
    application: tunnel
    exited: {bad_return,
                {{tunnel,start,[normal,[]]},
                 {'EXIT',
                     {undef,
                         [{cowboy_router,compile,
                              [[{'_',
                                    [{"/info",lobby_handler,[]},
                                     {"/join/:name",join_handler,[]},
                                     {"/play/:table_pid/:name/:auth/:team/:action/:x/:y",
                                      play_handler,[]}]}]],
                              []},
                          {tunnel,start,2,
                              [{file,
                                   "/Users/quantum/apps/tunnel/_build/default/lib/tunnel/src/tunnel.erl"},
                               {line,8}]},
                          {application_master,start_it_old,4,
                              [{file,"application_master.erl"},
                               {line,273}]}]}}}}
    type: permanent
{"Kernel pid terminated",application_controller,"{application_start_failure,tunnel,{bad_return,{{tunnel,start,[normal,[]]},{'EXIT',{undef,[{cowboy_router,compile,[[{'_',[{\"/info\",lobby_handler,[]},{\"/join/:name\",join_handler,[]},{\"/play/:table_pid/:name/:auth/:team/:action/:x/:y\",play_handler,[]}]}]],[]},{tunnel,start,2,[{file,\"/Users/quantum/apps/tunnel/_build/default/lib/tunnel/src/tunnel.erl\"},{line,8}]},{application_master,start_it_old,4,[{file,\"application_master.erl\"},{line,273}]}]}}}}}"}
Kernel pid terminated (application_controller) ({application_start_failure,tunnel,{bad_return,{{tunnel,start,[normal,[]]},{'EXIT',{undef,[{cowboy_router,compile,[[{'_',[{"/info",lobby_handler,[]},{"/j

Crash dump is being written

为什么它会崩溃？

Answer 1

如果这是您第一次使用rebar3，我建议您先从一个动态口令应用开始，而不是从一个动态口令版本开始：

rebar3 new app tunnel

然后，不要盲目地复制源文件，因为您可能会覆盖在src下面为您创建的文件。事先看一看该目录的内容。

我还建议花点时间阅读rebar3的https://www.rebar3.org/docs/basic-usage页面。

您还必须了解什么是OTP应用程序。我知道，有相当多的东西需要理解，有时也会令人困惑。免费的源码是http://learnyousomeerlang.com/building-applications-with-otp。买一本关于Erlang的书也是值得的。有几个，我建议使用https://www.manning.com/books/erlang-and-otp-in-action。

还有一个在线课程，免费，几天后开始(2017年2月20日) https://www.mooc-list.com/course/functional-programming-erlang-futurelearn