Build a wsl distro using docker

Readme.md

How to use

run the bat

docker-to-wsl.bat

then you can use the new distro (named "distro")

wsl -d distro

Entrypoint

if you want a custom entrypoint (on wsl start) you can use /etc/wsl.conf to set a custom entry command

Example

RUN printf "[boot]\ncommand = /etc/entrypoint.sh" >> /etc/wsl.conf
RUN printf "#!/bin/sh\ntouch /root/booted" >> /etc/entrypoint.sh
RUN chmod +x /etc/entrypoint.sh

docker-to-wsl.bat

docker build -t tmp-img .
if %errorlevel% neq 0 exit /b %errorlevel%
for /f "delims=" %%i in ('docker create tmp-img') do set CONTAINER_ID=%%i
docker export %CONTAINER_ID% --output="./latest.tar"
if %errorlevel% neq 0 exit /b %errorlevel%
docker rm tmp-img
call wsl --unregister distro
wsl --import distro . latest.tar
if %errorlevel% neq 0 exit /b %errorlevel%
call del latest.tar

Dockerfile

# you can also change the image.

FROM alpine:latest
# example: install fish shell
RUN apk update && apk add fish shadow
RUN chsh -s /usr/bin/fish
# example on how to set a env variable
RUN fish -c "set -Ux key value"