dependsOnPkgs Find Reverse Dependencies

Description

Find ‘reverse’ dependencies of packages, that is those packages which depend on this one, and (optionally) so on recursively.

Usage

dependsOnPkgs(pkgs,
              dependencies = "strong",
              recursive = TRUE, lib.loc = NULL,
              installed =
              utils::installed.packages(lib.loc, fields = "Enhances"))

Arguments

pkgs	a character vector of package names.
dependencies	a character vector listing the types of dependencies, a subset of c("Depends", "Imports", "LinkingTo", "Suggests", "Enhances"). Character string "all" is shorthand for that vector, character string "most" for the same vector without "Enhances", character string "strong" (default) for the first three elements of that vector.
recursive	logical: should reverse dependencies of reverse dependencies (and so on) be included?
lib.loc	a character vector of R library trees, or NULL for all known trees (see .libPaths).
installed	a result of calling installed.packages.

Value

A character vector of package names, which does not include any from pkgs.

See Also

package_dependencies() to get the regular (“forward”) dependencies of a package.

Examples

## there are few dependencies in a vanilla R installation:
## lattice may not be installed
dependsOnPkgs("lattice")