Hello,

I wonder if the concept of "environment" (comparable to conda environments or Julia Pkg environments) have been considered (it could help to have several versions of a library installed without odd effects).

Here is a possible workflow for dealing with environment with arduino-cli :

Create an environment named myenv

$ arduino-cli env create myenv

It should create an empty directory name myenv in ~/Documents/Arduino/envs

List all existing environments

$ arduino-cli env list

Add packages to this environment

Latest version of a package

$ arduino-cli lib install WiFi101 --env myenv

A given version

$ arduino-cli lib install "ArduinoJson==5.13.4" --env myenv

(this will need #105 to be fixed)

(An environment could also be created directly from a file but this could probably be implemented later)

I assume core is installed in the global environment (because I think it's important to keep ability to have libraries and core installed in a shared manner)

$ arduino-cli compile --fqbn arduino:samd:mkr1000 Arduino/MyFirstSketch --env myenv

This last command will use ArduinoJson==5.13.4 even if, for example, ArduinoJson==6.x.y is installed in the "global" environment.

What is your opinion of such an idea?

Kind regards