check_for_pkg: Check if a package is installed

In blaquez/dittodb: A Test Environment for Database Requests

Description

Uses requireNamespace() to check if a package is already installed and provides options for issuing an error, warning, etc. in case the package is not installed.

Usage

check_for_pkg(package, func = stop)

Arguments

package	the name of the package to check for
func	what should this check call if the package is not installed? This can be any function, but stop, warning, skip, etc. are likely candidates (default: stop)

Details

It is only exported for use in examples.

Value

TRUE if the package is installed, FALSE if it is not (invisibly)

Examples

check_for_pkg("DBI")
check_for_pkg("no-such-package", func = message)

blaquez/dittodb documentation built on Oct. 5, 2020, 12:02 a.m.