Is any way to install multiple versions of same package?

[StefanKarpinski]

@rssdev10

The conception of multiple packages actually is present in Ruby gems/bundler, Java/maven/gradle, etc. I can have multiple versions of same packages and use one of them in different applications. But in Julia I cannot install both HTTP 0.7.1 and 0.8.0. I have two different services.

You can absolutely do this in Julia as well. The best approach is probably to do something like this in the top directory of a project:

julia> # press `]` to activate the package REPL mode...

(v1.1) pkg> activate .

(Project1) pkg> add HTTP@0.8

This will create Project.toml and Manifest.toml files in Project1. After that if you run julia --project anywhere inside of that project directory, the initial active project will be Project1 instead of v1.1. In the other project directory, do the same thing but add HTTP 0.7 instead. These are totally separate and independent sets of packages and versions. If you commit the project and manifest files in version control, you’ll have a perfect record of your entire Julia dependency graph for each project.