cacheGetOptionCachePkgDir

<p>First checks if an environment variable <code>Require.cachePkgDir</code>
is set and defines a path.
If not set, checks whether the <code>options("Require.cachePkgDir")</code> is set.
If a character string, then it returns that.
If <code>TRUE</code>, then use <code>cachePkgDir()</code>. If <code>FALSE</code>
then returns <code>NULL</code>.</p>

A single key function, 'Require' that makes rerun-tolerant
versions of 'install.packages' and `require` for CRAN packages, packages
no longer on CRAN (i.e., archived), specific versions of packages,
and GitHub packages. This approach is developed to create reproducible
workflows that are flexible and fast enough to use while in development stages,
while able to build snapshots once a stable package collection is found.
As with other functions in a reproducible workflow, this package
emphasizes functions that return the same result whether it is
the first or subsequent times running the function, with subsequent times being
sufficiently fast that they can be run every time without undue waiting burden on
the user or developer.

Eliot J B

Require

Installing and Loading R Packages for Reproducible Workflows

Eliot J B McIntire

Alex M Chubaty

Her Majesty the Queen in Right of Canada, as represented by the Minister of Natural Resources Canada 

cacheGetOptionCachePkgDir function

Get the option for Require.cachePkgDir — cacheGetOptionCachePkgDir

Get the option for <code>Require.cachePkgDir</code>

cacheGetOptionCachePkgDir: Get the option for `Require.cachePkgDir`

Description

Usage

Arguments