blocks|key|4219958|text|我肯定有过Haskell平台的颠簸升级经历。如果你有足够的麻烦，你只想擦掉它，重新开始(你不会是第一个！)，看看这里：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4219959|Everywhere+that+GHC/Haskell+Platform+installs|offset|length|4219960|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/6884478/everywhere-that-ghc-haskell-platform-installs/^0|0|0|19|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

I've definitely had bumpy upgrade experiences with the Haskell Platform. If you have enough trouble that you just want to wipe the thing and start fresh (you wouldn't be the first!), take a look here: 

<a href="https://stackoverflow.com/questions/6884478/everywhere-that-ghc-haskell-platform-installs/">Everywhere that GHC/Haskell Platform installs</a>

blocks|key|532716|text|据我所知，目前还没有更新机制。在OSX上只安装一个平台版本在另一个平台上，我从来没有遇到过任何问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|532717|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

As far as I know there is no update mechanism. And I have never had any trouble with just installing one platform version on top of the other on OSX.

blocks|key|4220000|text|我来自未来(2013年6月)，为了成功安装更新的haskell平台，我不得不将我的整个haskell平台安装为nuke。所以..。升级仍然没有一条顺利的路。(至少在OS+X中)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4220001|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I come from the future (06/2013) and I just had to nuke my entire installation of the haskell platform in order to successfully install a newer. So... there's still no smooth way of upgrading. (At least in OS X)

blocks|key|4220030|text|你是否需要对现有的平台进行核化，这取决于cabal安装软件包的配置位置。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4220031|在Mac上，提供的GHC+install被修改为创建一个按照版本分隔软件包的配置。如果这是您使用的配置，那么您可以在旧平台上安装Haskell平台。|offset|length|style|BOLD|4220032|install-dirs+user
++prefix:+/Users/pgiarrusso/Library/Haskell/$compiler/lib/$pkgid
--+[...]
install-dirs+global
++prefix:+/Library/Haskell/$compiler/lib/$pkgid|code-block|syntax|javascript|4220033|特定于安装的二进制文件，如来自gtk2hs-buildtools的文件，仅使用类似上面的配置进行分隔。据我所知，至少实际的包寄存器(在~/.ghc/$GHC_VERSION中，由ghc-pkg和cabal使用)始终是每个GHC-version。由普通的cabal-install+(来自Hackage)生成的配置不会采取这样的预防措施。|CODE|4220034|install-dirs+user
++--+prefix:+/Users/pgiarrusso/.cabal
[...]
install-dirs+global
++--+prefix:+/usr/local|4220035|如果你有这样的配置，我估计你会遇到麻烦，除非你从旧的~/.cabal平台上删除至少/usr/local中的数据，以及/usr/local中的二进制文件-但不要破坏整个目录，因为/usr/local通常用于安装其他软件！|4220036|默认配置仅在不存在配置时生成，因此要更新配置，您需要移走现有配置。|4220037|entityMap^0|0|6|O|0|0|F|H|1V|J|0|0|Q|8|15|A|1M|A|2G|A|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Y|8|@$D|Z|E|10|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|11|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|12|8|@$D|13|E|14|F|O]|$D|15|E|16|F|O]]|9|@]|A|$]]|$1|P|3|Q|5|J|7|17|8|@]|9|@]|A|$K|L]]|$1|R|3|S|5|6|7|18|8|@$D|19|E|1A|F|O]|$D|1B|E|1C|F|O]|$D|1D|E|1E|F|O]|$D|1F|E|1G|F|O]]|9|@]|A|$]]|$1|T|3|U|5|6|7|1H|8|@]|9|@]|A|$]]|$1|V|3|-4|5|6|7|1I|8|@]|9|@]|A|$]]]|W|$]]

Whether you need to nuke the existing platform depends on where cabal is configured to install packages.

On Mac OS X, the supplied cabal-install is modified to create a config which separates packages by GHC version. If that's the config you used, you can just install the Haskell Platform on top of the old one.

<pre><code>install-dirs user
 prefix: /Users/pgiarrusso/Library/Haskell/$compiler/lib/$pkgid
-- [...]
install-dirs global
 prefix: /Library/Haskell/$compiler/lib/$pkgid
</code></pre>

Installation-specific binaries, like the ones from <code>gtk2hs-buildtools</code>, are only separated with a configuration like the above. As far as I can tell, at least the actual package register (in <code>~/.ghc/$GHC_VERSION</code>, used by ghc-pkg and cabal) is instead always per-GHC-version.
The config generated by a vanilla cabal-install (from Hackage) does not take such precautions.

<pre><code>install-dirs user
 -- prefix: /Users/pgiarrusso/.cabal
[...]
install-dirs global
 -- prefix: /usr/local
</code></pre>

If you have such a config, I expect you're going to get trouble unless you remove at least the data in <code>~/.cabal</code>, and also the binaries in <code>/usr/local</code> from the old Haskell Platform — but don't nuke the whole directory, since <code>/usr/local</code> is often used for installing other software!

The default config is only generated when no config exists, so to update the config you need to move away the existing one.

I'm on OSX 10.6 and I have platform 2010.2.0.0 currently. Should I just install 2011.2.0.1 on top or is there an update mechanism that will be smoother?

What's the smoothest way to update haskell platform to latest?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我使用的是OSX 10.6，目前我的平台是2010.2.0.0。我应该只在顶部安装2011.2.0.1，还是有一种更新机制会更流畅？

问将haskell平台更新到最新的最流畅的方法是什么？
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