如何在Haskell中将资源编译为二进制文件？ [英] How to compile a resource into a binary in Haskell?

问题描述

假设我有一个 dictionary.txt 文件，我需要将它读入映射并在我的程序中使用它，我如何才能使这个dictionary.txt文件包含在编译的exe文件中？

解决方案

您可以将序列化的数据类型存储为字节字符串。这里有一个例子：

• http://code.haskell.org/~dons/code/compiled-constants/


• http://haskell.org/haskellwiki/Compiling_in_constants
  

<但是，嵌入文件会自动执行此过程，简单的嵌入。

所有方法基本归结为将静态数据表示为字节字符串，

  { - ＃LANGUAGE OverloadedStrings＃ - } 
 
导入Data.Binary 
将合格的Data.Map导入为M 
将合格的Data.ByteString.Char8导入为S 
导入Data.ByteString.Lazy 
导入Codec.Compression.GZip 
 
  -  
  - 这是一个gzip压缩文字字符串，存储二进制编码DAT a.Map 
  -  
 mytable = 
\US\139\b\NUL\NUL\NUL\NUL\NUL\NUL\ETXEN \ 
 \\219\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \ 224 \ 171 \\\\\\\\\\\\\\\\\\\\\' \\ 210 \\\\\\\\\\\\\\\\\\\\\\\\\\' \ ENQ \ 214 \& 9> \ 202 \ 162 \ 179a \ 
 \\\\\\\\\\\\\\\\\\\' SYN\157\DC2D\226 * \ 
 \\\146\174o\t\167\DLE\209\i_\240\193\129 \\ 199< W \ 
 \\ 250nC \CAN\212\CAN\162J\160\141C\178\133\216; \ 
 \\\\\\\\\\\\\\\\\\\\'... \ 143 \\\\\\\\\\\\\\\\\'\\\\\\\\\\\\\\\\\'\\\\\\\\\\\\\\\\\\\\\\\\\\\\ 197 \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'\\ 
 
 main = print =<< M.lookupghcm 
其中
  - 从字符串中构建表：
 m :: M.Map字符串（可能是字符串）
 m =解码。解压。从块。返回$ mytable 
  

Say I have a dictionary.txt file, I need to read it into a map and use it in my program, how can I make this dictionary.txt file contained in the compiled exe file?

解决方案

You can store serialized data types as bytestring literals. Here's an example:

• http://code.haskell.org/~dons/code/compiled-constants/
• http://haskell.org/haskellwiki/Compiling_in_constants

However, the file-embed automates this process, making it easier to do non-trivial embeddings.

All approaches essentially boil down to representing the static data as a bytestring literal,

{-# LANGUAGE OverloadedStrings #-}

import Data.Binary
import qualified Data.Map as M
import qualified Data.ByteString.Char8 as S
import Data.ByteString.Lazy
import Codec.Compression.GZip

--
-- this is a gzip compressed literal bytestring, storing a binary-encoded Data.Map
--
mytable =
    "\US\139\b\NUL\NUL\NUL\NUL\NUL\NUL\ETXEN\
    \\219\SO\194 \f\197\224\188\196\CAN\227\US\
    \\224\171~\NAKc\GS4ce\161`\178\191\215(\176\
    \\190\180\167\231\210\n\241\171\203\191\ti\
    \\157\217\149\249< \ENQ\214\&9>\202\162\179a\
    \\132X\233\ESC=\231\215\164\SYN\157\DC2D\226*\
    \\146\174o\t\167\DLE\209\"i_\240\193\129\199<W\
    \\250nC\CAN\212\CAN\162J\160\141C\178\133\216;\
    \\\@4\144-W\203\209x\205\140\166\RS\163\237]9f\
    \\170\143\ACK\163g\223\STX\184\&7\rH\222\FSW\
    \\130\&7D\197\NUL\164\&0U\193\186\t\186o\
    \\228\180~\NUL\a6\249\137#\SOH\NUL\NUL"

main = print =<< M.lookup "ghc" m
    where
        -- build the table from the bytestring:
        m :: M.Map String (Maybe String)
        m = decode . decompress . fromChunks . return $ mytable

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