使用cabal-dev避免依赖冲突 [英] Using cabal-dev to avoid dependency conflicts

问题描述

目前，我已经按照由Volker Schatz全球安装cabal所规定的全球安装。在了解cabal依赖关系消息中，尝试安装GOA时，我遇到依赖冲突，并且会因此，希望尝试通过cabal-dev安装GOA（ cabal-dev by Rogan Creswick ）隔离安装（如果我正确理解，未来将包含沙盒功能，请参阅的cabal-sandbox.htmlrel =nofollow> cabal沙盒，但是由于它还在开发中，我想给cabal-dev一个尝试）。

Currently I have cabal installed globally as specified in Installing cabal globally by Volker Schatz. In the post Understanding cabal dependency messages I was getting dependency conflicts when trying to install GOA, and would therefore like to try to install GOA via cabal-dev (cabal-dev by Rogan Creswick) in order to isolate the installation (if I understand it correctly cabal will include a sandboxing feature in the future, see cabal sandbox by Johan Tibell, but since it is still under development I would like to give cabal-dev a try).

问题：所以，因为我的〜/ .cabal 是一个象征性的链接 / usr / local / share / cabal （按照url 1 ），我将如何使用cabal-dev安装GOA？理想情况下，安装仍然会放在 / usr / local / share / cabal 中，但也可能在专门的目录（如 / usr / local / share / cabal / cabal-dev

Question : So given that my ~/.cabal is a symbolic link to /usr/local/share/cabal (as is done in url 1), how would I go about using cabal-dev to install GOA? Ideally the installation would still be placed in /usr/local/share/cabal, but maybe in a specialised directory like /usr/local/share/cabal/cabal-dev

推荐答案

据了解，cabal-dev的目的是创建一个孤立的环境，仅用于编译项目或具有兼容依赖关系的特定子项目集。您唯一需要做的就是将cabal-dev运行在cabalized项目的目录中，它将为您的所有依赖项找到正确的版本集，并将其本地编译并安装在cabal-dev你的子目录。如果你要求它在一个集中的位置，像/ usr / local / ...，那么你会击败cabal-dev的整个目的。如果您仍然有疑问，请检查virtualenv ... cabal-dev的工作方式有点类似。

As I understand it, the purpose of cabal-dev is to create an isolated environment just for compiling your project or a specific set of subprojects with compatible dependencies. The only thing you need to do is to run cabal-dev in the directory of your "cabalized" project, and it will locate the correct set of version for all your dependencies and compile and install them locally, in "cabal-dev" of your subdirectory. If you asked it to do that in a centralized location, like "/usr/local/...", then you would be defeating the whole purpose of cabal-dev. If you are still in doubt, please check virtualenv... cabal-dev works in a somewhat similar fashion.

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