haskell - 最小的 haskell (ghc) 程序安装(无需 ghc/cabal 进行部署)

Question

(我的问题是在没有 haskell-platform、ghc、cabal 等的情况下分发二进制文件)

我需要部署一个结构良好的 haskell 应用程序(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、软件包等...需要更多磁盘空间等...

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

在我的具体情况下，我可以生成

cabal clean && cabal configure && cabal build

并成功运行(有些类似)

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

但是，依赖项呢？如何将其移至生产环境？ (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吗？怎么办？

非常感谢!

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由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(使用以快乐为例):

/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 中，请将所需的前缀传递给 Setup configure。

如果目标主机在其他方面相似(安装了相同版本的 C 库，例如 gmp 和 ffi)，则此方法效果很好。如果您还需要静态链接某些 C 库，请参阅 question哈马尔在他的评论中链接了。