将args通过rebar shell传递给erl？

Posted 2023-03-15

【中文标题】将args通过rebar shell传递给erl？

【英文标题】：Pass args through rebar shell to erl?

【发布时间】：2016-01-27 09:54:04

【问题描述】：

我正在使用“rebar shell”来测试我的应用程序。这被记录为：

启动一个预先加载项目和deps的shell，类似于

'erl -pa ebin -pa deps/*/ebin'.

如何在“erl”的底层调用中添加额外的参数？为了 例如，我想添加应用程序特定的环境变量和 运行一个模块/函数。我想调用类似的东西：

 erl -pa ebin -pa deps/*/ebin -browser_spy browser_exe "/my/dir" -run bs_example test

（我希望 code:priv_dir 像使用 rebar shell 时一样工作， 上面的 'erl' 命令没有这样做）。

【参考方案1】：

你不能

rebar shell 实际上并不执行erl ... 命令，而只是尝试复制其行为。

实际上，rebar 只是通过添加带有code:add_pathz 的路径来模仿-pa 将自己变成外壳

实现细节见here：

shell(_Config, _AppFile) ->
    true = code:add_pathz(rebar_utils:ebin_dir()),
    %% scan all processes for any with references to the old user and save them to
    %% update later
    NeedsUpdate = [Pid || Pid <- erlang:processes(),
        proplists:get_value(group_leader, erlang:process_info(Pid)) == whereis(user)
    ],
    %% terminate the current user
    ok = supervisor:terminate_child(kernel_sup, user),
    %% start a new shell (this also starts a new user under the correct group)
    _ = user_drv:start(),
    %% wait until user_drv and user have been registered (max 3 seconds)
    ok = wait_until_user_started(3000),
    %% set any process that had a reference to the old user's group leader to the
    %% new user process
    _ = [erlang:group_leader(whereis(user), Pid) || Pid <- NeedsUpdate],
    %% enable error_logger's tty output
    ok = error_logger:swap_handler(tty),
    %% disable the simple error_logger (which may have been added multiple
    %% times). removes at most the error_logger added by init and the
    %% error_logger added by the tty handler
    ok = remove_error_handler(3),
    %% this call never returns (until user quits shell)
    timer:sleep(infinity).