esolang/haskell

Haskell

• https://www.haskell.org/

This image is part of the https://github.com/hakatashi/esolang-box (v2.6.0).

Overview

https://github.com/hakatashi/esolang-box provides a consistent, Docker-based interface for running 244 programming languages — from mainstream languages to obscure esoteric programming languages.

Every image in the collection follows the same interface:

• First argument — path to the source code file
• stdin — program input
• stdout — program output

This means you can switch between languages without changing how you invoke them. All images are available under the https://hub.docker.com/u/esolang/.

The haskell command (also aliased as script) runs the Haskell interpreter inside this image.

Usage

Run a script

sh
$ ls
hello.hs

$ docker run --rm -v "$PWD":/code:ro esolang/haskell haskell /code/hello.hs
Hello, World!

Pass input via stdin

sh
$ docker run -i --rm -v "$PWD":/code:ro esolang/haskell haskell /code/hello.hs < input.txt

Open an interactive shell

Useful for debugging or exploring the image environment.

sh
$ docker run -it --rm -v "$PWD":/code:ro esolang/haskell sh
# haskell /code/hello.hs
Hello, World!

Trace exec syscalls with strace

esolang-box supports tracing execve and execveat syscalls. Set the STRACE_OUTPUT_PATH environment variable and grant the SYS_PTRACE capability to write a strace log to the specified path.

sh
$ docker run --cap-add=SYS_PTRACE --rm -v "$PWD":/code \
    --env STRACE_OUTPUT_PATH=/code/strace.txt \
    esolang/haskell haskell /code/hello.hs
Hello, World!

Notes:

• On kernels older than 4.8, https://bugs.chromium.org/p/project-zero/issues/detail?id=1718. Avoid using --cap-add=SYS_PTRACE on such systems (e.g. Ubuntu Xenial).
• Strace adds significant overhead — syscalls may run roughly 10× slower than normal.