EVOLUTION-MANAGER
Edit File: with_envvar.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Environment variables</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for with_envvar {withr}"><tr><td>with_envvar {withr}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Environment variables</h2> <h3>Description</h3> <p>Temporarily change system environment variables. </p> <h3>Usage</h3> <pre> with_envvar(new, code, action = "replace") local_envvar( .new = list(), ..., action = "replace", .local_envir = parent.frame() ) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>new, .new</code></td> <td> <p><code style="white-space: pre;">[named character]</code><br /> New environment variables</p> </td></tr> <tr valign="top"><td><code>code</code></td> <td> <p><code>[any]</code><br /> Code to execute in the temporary environment</p> </td></tr> <tr valign="top"><td><code>action</code></td> <td> <p>should new values <code>"replace"</code>, <code>"prefix"</code> or <code>"suffix"</code> existing variables with the same name.</p> </td></tr> <tr valign="top"><td><code>...</code></td> <td> <p>Named arguments with new environment variables.</p> </td></tr> <tr valign="top"><td><code>.local_envir</code></td> <td> <p><code style="white-space: pre;">[environment]</code><br /> The environment to use for scoping.</p> </td></tr> </table> <h3>Details</h3> <p>if <code>NA</code> is used those environment variables will be unset. If there are any duplicated variable names only the last one is used. </p> <h3>Value</h3> <p><code>[any]</code><br /> The results of the evaluation of the <code>code</code> argument. </p> <h3>See Also</h3> <p><code><a href="withr.html">withr</a></code> for examples </p> <p><code><a href="../../base/html/Sys.setenv.html">Sys.setenv()</a></code> </p> <h3>Examples</h3> <pre> with_envvar(new = c("GITHUB_PAT" = "abcdef"), Sys.getenv("GITHUB_PAT")) # with_envvar unsets variables after usage Sys.getenv("TEMP_SECRET") with_envvar(new = c("TEMP_SECRET" = "secret"), Sys.getenv("TEMP_SECRET")) Sys.getenv("TEMP_SECRET") </pre> <hr /><div style="text-align: center;">[Package <em>withr</em> version 2.5.0 <a href="00Index.html">Index</a>]</div> </body></html>