Version restriction for installing library

[s-celles]

Hello,

I noticed in doc:

 $ arduino-cli lib install "WiFi101"

install latest "registered" library named WiFi101.

I wonder if it's currently possible to restrict version of library to install a library using a command line like

 $ arduino-cli lib install "ArduinoJson<6.0.0,>=5.0.0"

or simply

 $ arduino-cli lib install "ArduinoJson<6.0.0"

Such a command could install latest version between 5.0.0 (include) and 6.0.0 (exclude)
ie, currently 5.13.4.

This is quite similar to Python requirements.txt syntax.
See https://www.python.org/dev/peps/pep-0440/#compatible-release and https://stackoverflow.com/questions/8795617/how-to-pip-install-a-package-with-min-and-max-version-range

Installing a given version should also be considered (or documented)

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

Specifying an "unregistered" library could also be supported (with care) ( #128 )

https://stackoverflow.com/questions/16584552/how-to-state-in-requirements-txt-a-direct-github-source

Kind regards

PS : related issue arduino/Arduino#5795
PS2 : installing several differents versions of a library could be done using environments #108

[phd]

Installing a given version should also be considered (or documented)

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

You can install a specific version of a library with:

$ arduino-cli lib install "ArduinoJson@5.13.4"

[s-celles]

Thanks @phd . That's an interesting improvement of arduino-cli.
But I don't think version restriction are currently implemented (ie lib version number lower than a given version number and greater than an other one)

[ubidefeo]

@silvanocerza do we support this?
Might be an interesting one if we don't :)

[silvanocerza]

I like this, would be something nice to have. I think it would be feasible but I'd have to investigate a bit first just to be sure.