Check that packages are installed, without loading them

Calls find.package() to check if the all packages are installed.

Usage

check_packages_installed(
  pkgs,
  warn = TRUE,
  msg = "The following packages are required but not installed: %s"
)

Arguments

pkgs

(character())
Packages to check.

warn

(logical(1))
If TRUE, signals a warning of class "packageNotFoundWarning" about the missing packages.

msg

(character(1))
Format of the warning message. Use "%s" as placeholder for the list of packages.

Value

(logical()) named with package names. TRUE if the respective package is installed, FALSE otherwise.

Examples

check_packages_installed(c("mlr3misc", "foobar"), warn = FALSE)
#> mlr3misc   foobar 
#>     TRUE    FALSE 

# catch warning
tryCatch(check_packages_installed(c("mlr3misc", "foobaaar")),
  packageNotFoundWarning = function(w) as.character(w))
#> [1] "packageNotFoundWarning: The following packages are required but not installed: foobaaar\n"