Install package dependencies if needed.

install_deps(pkgdir = ".", dependencies = NA,
repos = getOption("repos"), type = getOption("pkgType"),
"--no-build-vignettes"), ...)
pkgdir path to a package directory, or to a package tarball. Which dependencies do you want to check? Can be a character vector (selecting from "Depends", "Imports", "LinkingTo", "Suggests", or "Enhances"), or a logical vector. TRUE is shorthand for "Depends", "Imports", "LinkingTo" and "Suggests". NA is shorthand for "Depends", "Imports" and "LinkingTo" and is the default. FALSE is shorthand for no dependencies (i.e. just check this package, not its dependencies). A character vector giving repositories to use. Type of package to update. One of "ask", "always" or "never". "ask" prompts the user for which out of date packages to upgrade. For non-interactive sessions "ask" is equivalent to "always". TRUE and FALSE are also accepted and correspond to "always" and "never" respectively. If TRUE, suppress output. If TRUE build the package before installing. Options to pass to R CMD build, only used when build is TRUE. additional arguments passed to utils::install.packages().
# NOT RUN {
# }