ETOOBUSY 🚀 minimal blogging for the impatient
Sometimes I need a quick pristine environment to use some tool I don’t want to install on some files in a directory. Here’s how quenv comes to help.
Remember the suggestion to Try with Docker? I do follow that! Especially when there is a tool I don’t want around permanently, but in that precise moment would be sooo useful…
So it struck me to create quenv:
- it’s a Docker image leveraging Alpine Linux, so it’s tight but it has a fairly impressive amount of available packages
- it contains suexec (which we already discussed in Command-line Docker Applications - A way forward)
so it basically allows us to do this:
docker run --rm -it -v "$PWD:/mnt" registry.gitlab.com/polettix/quenv "$@"
Let’s see it in action:
The working directory inside the container is
/mnt, which is also the
home of the internal user, whose id and group-id are set at the beginning
to reflect those of the caller in the host. This makes it easy to
bind-mount the current working directory over it (
-v "$PWD:/mnt") and
forget about permissions and ownership when exiting the container.