using Pkg
Pkg.add(PackageSpec(url="https://github.com/username/repo.git"))
Option 1: Using the `Pkg.add()` function
The first option to solve this issue is by using the `Pkg.add()` function in Julia. This function allows us to add a package to our project by specifying its URL. In this case, we can provide the URL of the private package on GitHub that we want to install.
using Pkg
Pkg.add(PackageSpec(url="https://github.com/username/repo.git"))
This code snippet imports the `Pkg` module and then uses the `Pkg.add()` function to add the private package to our project. The `PackageSpec` argument specifies the URL of the package on GitHub.
Option 2: Cloning the repository and adding it to the project
Another option is to manually clone the repository of the private package from GitHub and then add it to our project using the `Pkg.develop()` function.
using Pkg
run(`git clone https://github.com/username/repo.git`)
Pkg.develop(PackageSpec(path="path/to/cloned/repo"))
This code snippet first uses the `run()` function to execute the `git clone` command and clone the repository of the private package. Then, the `Pkg.develop()` function is used to add the cloned package to our project. The `PackageSpec` argument specifies the path to the cloned repository.
Option 3: Adding the package directly from a local directory
If we have a local copy of the private package on our machine, we can add it to our project directly from the local directory using the `Pkg.develop()` function.
using Pkg
Pkg.develop(PackageSpec(path="path/to/local/repo"))
This code snippet uses the `Pkg.develop()` function to add the package to our project. The `PackageSpec` argument specifies the path to the local directory where the package is located.
After considering the three options, the best approach depends on the specific situation. If the private package is already available on GitHub, Option 1 using `Pkg.add()` is the most straightforward and convenient. However, if we need to work with a local or cloned copy of the package, Options 2 and 3 provide the necessary flexibility.