如何将 GHCi 与新的 Cabal 1.17 沙箱一起使用? [英] How can I use GHCi with the new cabal 1.17 sandboxes?

问题描述

我一直在尝试 cabal head，它支持类似于 cabal-dev 的沙箱.然而，目前尚不支持 cabal-dev ghci 等价物和 显然下一个版本没有计划支持.

I've been trying out cabal head which has support for sandboxes similar to cabal-dev. However there's not yet support for a cabal-dev ghci equivalent and apparently no support planned for the next release.

是否有一些咒语我可以用来解决这个问题并获得类似于 cabal-dev ghci 的东西?

Is there some incantation I can use to work around this and get something similar to cabal-dev ghci?

推荐答案

edit(2013 年 8 月):cabal repl 补丁最近已合并.此功能将成为下一个版本的一部分.

edit (August 2013): The cabal repl patches have recently been merged. This functionality will be a part of the next release.

在撰写本文时，没有类似于 cabal-dev ghci 的易于使用的类似物.我们计划在未来添加一个 cabal repl 命令 - 然而，目前这个功能不在 Cabal HEAD 中.

As of this writing, there is no easy-to-use analogue to cabal-dev ghci. We plan to add a cabal repl command in the future - however, at the moment this functionality is not in Cabal HEAD.

在此期间，您可以尝试以下解决方法:

In the meantime, you can try the following workaround:

$ cd $YOUR_PACKAGE_DIR

# For GHC >= 7.6
$ ghci -no-user-package-db -package-db .cabal-sandbox/i386-linux-ghc-7.6.1-packages.conf.d

# For GHC < 7.6
$ ghci -no-user-package-conf -package-conf .cabal-sandbox/i386-linux-ghc-7.4.2-packages.conf.d

这不会使您的包的模块立即从 ghci 可用 - 您必须使用 :l 或 import 加载它们(在存在自定义预处理器和 CPP 的情况下可能会中断).

This won't make the modules of your package immediately available from ghci - you will have to load them with :l or import (which can break in the presence of custom preprocessors and CPP).

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