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dockerfile - A simple Dockerfile DSL for Haskell

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Examples

  • Write a simple Dockerfile

    {-# LANGUAGE OverloadedStrings #-}
    
    import Data.Docker
    
    main :: IO ()
    main = putStrLn $ do
        dockerfile $ do
            from "debian:stable"
            env "DEBIAN_FRONTEND" "noninteractive"
            run "apt-get -y update"
            run "apt-get -y upgrade"
            cmd ["echo", "hello world"]
    
  • Write a Dockerfile directly to a file

    {-# LANGUAGE OverloadedStrings #-}
    
    import Data.Docker
    
    main :: IO ()
    main = dockerfileWrite "Dockerfile.example $ do
        from "debian:stable"
        run "apt-get -y update"
        run "apt-get -y upgrade"
        cmd ["echo", "hello world"]
    
  • Multi-stage build (a cleaner alternative to https://github.com/fpco/haskell-scratch):

    {-# LANGUAGE OverloadedStrings #-}
    
    import Data.Docker
    
    main :: IO ()
    main = putStrLn $ do
    
        dockerfile $ do
    
            fromas "debian:stable" "base"
            env "DEBIAN_FRONTEND" "noninteractive"
    
            run "apt-get -y update"
            run "apt-get -y install netbase"
    
            let prod_img_files = [
                    "/lib/x86_64-linux-gnu/libc.so.6"
                  , "/etc/protocols"
                  ]
    
            from "scratch"
    
            forM_ prod_img_files $ \fp -> do
                copyfrom "base" fp fp
    
            entrypoint ["bash"]
    

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A Haskell DSL for Generating Dockerfiles

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