最小的haskell（ghc）程序安装（没有ghc / cabal的部署）

Question

（我的问题是关于没有haskell-platform，ghc，cabal等的分发二进制文件）

我需要部署一个良好的cabal形成haskell应用程序（一个Yesod脚手架），但我有磁盘空间限制。

GHC大小约为1Gbytes，存储所有cabal源代码，包等...需要更多磁盘空间等...

显然，haskell-platform，ghc，...是关于开发（不是部署）。

在我的具体情况下，我可以生成

cabal clean && cabal configure && cabal build

并成功运行（有些像）

./dist/build/MyEntryPoint/MyEntryPoint arg arg arg

但是，依赖关系呢？如何将其转移到生产环境？ （连同我的“dist”汇编）

我可以在没有cabal的情况下放置二进制依赖项 怎么样？

非常感谢你！

Answer 1

默认情况下，ghc使用Haskell库的静态链接。 因此，生成的二进制文件独立于Haskell生态系统。 如果您的程序不需要任何数据文件，只需将二进制文件从./dist/build/MyEntryPoint/MyEntryPoint复制到主机

如果您还有使用Cabal的数据路径查找逻辑的二进制文件引用的数据文件（例如模板，图像，静态html页面），则可以按如下方式使用Setup copy （使用happy作为示例）：

/tmp/happy-1.18.10 $ ./Setup configure
Warning: defaultUserHooks in Setup script is deprecated.
Configuring happy-1.18.10...
/tmp/happy-1.18.10 $ ./Setup build
Building happy-1.18.10...
Preprocessing executable 'happy' for happy-1.18.10...
[ 1 of 18] Compiling NameSet          ( src/NameSet.hs, dist/build/happy/happy-tmp/NameSet.o )
[..]
[18 of 18] Compiling Main             ( src/Main.lhs, dist/build/happy/happy-tmp/Main.o )
Linking dist/build/happy/happy ...
/tmp/happy-1.18.10 $ ./Setup copy --destdir=/tmp/to_be_deployed/
Installing executable(s) in /tmp/to_be_deployed/usr/local/bin
/tmp/happy-1.18.10 $ find /tmp/to_be_deployed
/tmp/to_be_deployed
/tmp/to_be_deployed/usr
/tmp/to_be_deployed/usr/local
/tmp/to_be_deployed/usr/local/bin
/tmp/to_be_deployed/usr/local/bin/happy
/tmp/to_be_deployed/usr/local/share
/tmp/to_be_deployed/usr/local/share/doc
/tmp/to_be_deployed/usr/local/share/doc/happy-1.18.10
/tmp/to_be_deployed/usr/local/share/doc/happy-1.18.10/LICENSE
/tmp/to_be_deployed/usr/local/share/happy-1.18.10
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/GLR_Lib-ghc-debug
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/GLR_Lib-ghc
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/GLR_Lib
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/GLR_Base
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/HappyTemplate-arrays-coerce-debug
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/HappyTemplate-arrays-ghc-debug
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/HappyTemplate-arrays-debug
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/HappyTemplate-arrays-coerce
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/HappyTemplate-arrays-ghc
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/HappyTemplate-arrays
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/HappyTemplate-coerce
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/HappyTemplate-ghc
/tmp/to_be_deployed/usr/local/share/happy-1.18.10/HappyTemplate
/tmp/happy-1.18.10 $ rsync -rva /tmp/to_be_deployed/ production.host:/
[..]

如果您不想安装到/usr/local则将所需的前缀传递给Setup configure 。

如果目标主机在其他方面类似（相同版本的C库，如安装了gmp和ffi），则此方法很有效。 如果您还需要静态链接某个C库，请参阅hammar在其评论中链接的问题 。