Installing haskell in an Ubuntu Docker container

haskell.docker.sh

# These commands were run using the bash shell on Debian 11 in the Linuv Dev Env on a Chromebook

# make sure no haskell instances exist
docker container stop haskell ; docker container rm haskell ; sleep 2

# run an Ubuntu container in the background
docker container run -d --name haskell ubuntu:22.04 sleep inf

# install utilities and haskell
<<'eof' docker container exec -i haskell /bin/bash
  DEBIAN_FRONTEND=noninteractive
  apt-get update
  apt-get install -y vim tree curl jq git file
  apt-get install -y ghc
  mkdir -p /tmp/haskell
eof

# at this point one could commit the container to an image
# ... or convert the above commands to a Dockerfile to build an image

# for fun, download some haskell code
<<'eof' docker container exec -i -w /tmp/haskell haskell /bin/bash
  curl -s https://www.schoolofhaskell.com/tutorial-raw/6170/e6ed3e6f43459bb134948a6053e1000237a06aa2 |
  awk '
    BEGIN { in_code = 0 } ;
    /^###/ { 
      gsub(/^#+ */,"") ;
      gsub(/ +/, ".")  ;
      name = tolower($0) ".hs" ;
    } ;
    /^```/ && in_code {
      print "== To: " name
      lines = lines "\n"
      print lines > name
      lines = ""
      in_code = !in_code ;
      next ;
    } ;
    /^```/ && !in_code {
      in_code = !in_code ;
      next ;
    } ;
    in_code {
      lines = lines "\n" $0
    };
  '
eof

# exec into an interactive container
docker container exec -it -w /tmp/haskell haskell /bin/bash