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,只需将二进制文件复制./dist/build/MyEntryPoint/MyEntryPoint到主机即可

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),则可以使用Setup copy如下(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,/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.