I find it hard to remember how to “set up” a development environment. Maybe I have multiple plates spinning or a lot time passes between visiting an environment. I want to just do a small number of commands to “get back” to where I was when I last did some work.
This describes how direnv can be exploited for a solution. Below I assume you have read its home page and understand the basics of how it works.
Examples will use convention:
h$ echo "this is a host prompt" c$ echo "this is a container prompt"
h$ singularity exec --bind /cvmfs -i bash --rcfile wcls.rc
See example wcls.rc file. Copy it to near your task working areas and customize it.
h$ mkdir -p ~/tasks h$ cp /path/to/wire-cell-containers/scripts/wcls.rc ~/tasks