哪个Haskell包包含给定的模块

I know a Haskell module name, but I can't figure out in what package it is defined. This is bad because I can't compile without a package exposing this module.

我知道一个Haskell模块名称,但我无法弄清楚它是在什么包中定义的。这很糟糕,因为如果没有暴露这个模块的包,我就无法编译。

Specificaly it is Text.Regex that I can't locate, but I would like to know how to solve that problem in general.

具体来说,我无法找到Text.Regex,但我想知道如何解决这个问题。

4 个解决方案

#1

http://www.haskell.org/ghc/docs/latest/html/users_guide/packages.html

ghc-pkg find-module Text.Regex

But that only works for (a) recent GHCs, and (b) packages installed on your system.

但这仅适用于(a)最近的GHC,以及(b)系统上安装的软件包。

You can also grep through the package file (e.g. /usr/lib/ghc-6.8.2/package.conf) to see what's installed.

您还可以浏览包文件(例如/usr/lib/ghc-6.8.2/package.conf)以查看已安装的内容。

You can also use either the haskell API search engines hoogle or the hackage search engine hayoo.

您还可以使用haskell API搜索引擎hoogle或hackage搜索引擎hayoo。

Text.Regex is in the package regex-base, and a few others built on top of it.

Text.Regex在包regex-base中,还有一些基于它构建。

#2

If you're using Cabal and you have the package installed, you can just try to compile it with cabal build, and Cabal will inform you of which package you forgot to add to your dependencies:

如果您正在使用Cabal并且已安装了软件包,则可以尝试使用cabal构建进行编译,并且Cabal将通知您忘记添加到依赖项中的软件包:

Main.hs:1:8:
    Could not find module `Text.Regex':
      It is a member of the hidden package `regex-compat-0.93.1'.
      Perhaps you need to add `regex-compat' to the build-depends in your .cabal file.
      Use -v to see a list of the files searched for.

#3

The best tools are:

最好的工具是:

hoogle; or
hayoo.

Both are search engines for Haskell modules and functions.

两者都是Haskell模块和函数的搜索引擎。

#4

If you are using Debian and the Debian-provided packages, there is a global documentation index at /usr/share/doc/ghc-doc/html/libraries/index.html which lists the package in the last column.

如果您使用的是Debian和Debian提供的软件包,则/usr/share/doc/ghc-doc/html/libraries/index.html上有一个全局文档索引,其中列出了最后一列中的软件包。

#1