Erlang 编译错误"No command to run specified!"

Question

我用IntelliJ和Rebar构建了Erlang开发环境。

我修改了 Erlang 插件提供的模板代码。

但它不编译。

编译日志：

"C:  Program Files  erl8.2  bin  rebar" "C:  Program Files 
No command to run specified!
Usage: rebar [-h] [-c] [-v <verbose>] [-q <quiet>] [-V] [-f]
To see a list of built-in commands, execute rebar -c.
        [-D <defines>] [-j <jobs>] [-C <config>] [-p] [-k]
Type 'rebar help <CMD1> <CMD2>' for help on specific commands.
rebar allows you to abbreviate the command to run:
(commands...)

erlang_app.erl ：

-spec(start(StartType :: normal | {takeover, node()} | {failover, node()},
    StartArgs :: term()) ->
  {ok, pid()} |
  {ok, pid(), State :: term()} |
  {error, Reason :: term()}).
start(_StartType, _StartArgs) ->
  case 'erlang_sup:':start_link() of
    {ok, Pid} ->
      io:format("start ok~n"),
      {ok, Pid};
    Error ->
      Error
  end.

erlang_sub.erl

目前，没有要生成的通用服务器，因此我还注释掉了函数返回的AChild部分和AChlid部分。

%%  AChild = {'AName', {'AModule', start_link, []},
%%    Restart, Shutdown, Type, ['AModule']},
  {ok, {SupFlags, [AChild]}}.

start.bat

werl -pa ./ebin -eval "application:start(erlang)"

Answer 1

您显示的日志显示您已在没有参数的情况下运行命令 rebar。要编译项目，您应该使用rebar compile命令。