install.md

Installation

These instructions are intended to help with setting up the included renv virtual environment, which ensures all participants are using the same exact set of R packages (and package versions). A few important notes to keep in mind:

• When R is started from the top level of this repository, renv is activated automatically. There is no further action required on your part. If renv is not installed, it will be installed automatically, assuming that you have an active internet connection.
• While renv is active, the R session will only have access to the packages (and their dependencies) that are listed in the renv.lock file -- that is, you should not expect to have access to any other R packages that may be installed elsewhere on the computing system in use.
• Upon an initial attempt, renv will prompt you to install packages listed in the renv.lock file, by printing a message like the following:

  * Project 'PATH/TO/enar2023-workshop' loaded. [renv 0.13.2]
  * The project may be out of sync -- use `renv::status()` for more details.
  > renv::status()
  The following package(s) are recorded in the lockfile, but not installed:
  # A list of packages will appear here
  Use `renv::restore()` to install these packages.

In any such case, please call renv::restore() to install any missing packages. Note that you do not need to manually install the packages via install.packages(), remotes::install_github(), or similar.

For details on how the renv system works, the following references may be helpful:

1. Collaborating with renv
2. Introduction to renv

In some rare cases, R packages that renv automatically tries to install as part of the renv::restore() process may fail due to missing systems-level dependencies. In such cases, a reference to the missing dependencies and system-specific instructions their installation involving, e.g., Ubuntu Linux's apt or homebrew for macOS, will usually be displayed.