getPkgVersions

While these are not intended to be called manually by users, they may be
of some use for advanced users.

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 

getPkgVersions function

<dl><dt>pkgDT</dt>
<dd>A pkgDT data.table.</dd>
<dt>install</dt>
<dd>Logical or "force". If <code>FALSE</code>, this will not try to install
anything. If <code>"force"</code>, then it will force installation of requested
packages, mimicking a call to e.g., <code>install.packages</code>. If <code>TRUE</code>, the
default, then this function will try to install any missing packages or
dependencies.</dd>
<dt>verbose</dt>
<dd>Numeric or logical indicating how verbose should the function
be. If -1 or -2, then as little verbosity as possible. If 0 or FALSE,
then minimal outputs; if <code>1</code> or TRUE, more outputs; <code>2</code> even more. NOTE: in
<code>Require</code> function, when <code>verbose &gt;= 2</code>, the return object will have an
attribute: <code>attr(.., "Require")</code> which has lots of information about the
processes of the installs.</dd></dl>

Arguments

Internals used by Require — getPkgVersions

<dl>

<dt>pkgDT</dt>
<dd>A pkgDT data.table.</dd>


<dt>install</dt>
<dd>Logical or "force". If <code>FALSE</code>, this will not try to install
anything. If <code>"force"</code>, then it will force installation of requested
packages, mimicking a call to e.g., <code>install.packages</code>. If <code>TRUE</code>, the
default, then this function will try to install any missing packages or
dependencies.</dd>


<dt>verbose</dt>
<dd>Numeric or logical indicating how verbose should the function
be. If -1 or -2, then as little verbosity as possible. If 0 or FALSE,
then minimal outputs; if <code>1</code> or TRUE, more outputs; <code>2</code> even more. NOTE: in
<code>Require</code> function, when <code>verbose &gt;= 2</code>, the return object will have an
attribute: <code>attr(.., "Require")</code> which has lots of information about the
processes of the installs.</dd>

</dl>

getPkgVersions: Internals used by `Require`

Description

Usage

Value

Arguments