EVOLUTION-MANAGER
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type="text/css" /> </head> <body> <h1 class="title toc-ignore">Manage lifecycle changes in functions you use</h1> <p>The lifecycle package uses warnings to tell you about deprecated functions. Deprecated functions will be removed in a future release, so it’s good practice to eliminate the warnings as soon as you see them.</p> <p>For example, lets imagine your code uses <code>tibble::data_frame()</code>, which was deprecated in favour of <code>tibble()</code> in version 1.1.0. <code>data_frame()</code> now looks something like this:</p> <div class="sourceCode" id="cb1"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a>data_frame <span class="ot"><-</span> <span class="cf">function</span>(...) {</span> <span id="cb1-2"><a href="#cb1-2" aria-hidden="true" tabindex="-1"></a> lifecycle<span class="sc">::</span><span class="fu">deprecate_warn</span>(<span class="st">"1.1.0"</span>, <span class="st">"data_frame()"</span>, <span class="st">"tibble()"</span>)</span> <span id="cb1-3"><a href="#cb1-3" aria-hidden="true" tabindex="-1"></a> tibble<span class="sc">::</span><span class="fu">tibble</span>(...)</span> <span id="cb1-4"><a href="#cb1-4" aria-hidden="true" tabindex="-1"></a>}</span></code></pre></div> <p>That means if you use <code>data_frame()</code> in your own code you’ll get a warning:</p> <div class="sourceCode" id="cb2"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a>df1 <span class="ot"><-</span> <span class="fu">data_frame</span>(<span class="at">x =</span> <span class="dv">1</span>, <span class="at">y =</span> <span class="dv">2</span>)</span> <span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a><span class="co">#> Warning: `data_frame()` was deprecated in tibble 1.1.0.</span></span> <span id="cb2-3"><a href="#cb2-3" aria-hidden="true" tabindex="-1"></a><span class="co">#> ℹ Please use `tibble()` instead.</span></span> <span id="cb2-4"><a href="#cb2-4" aria-hidden="true" tabindex="-1"></a><span class="co">#> This warning is displayed once every 8 hours.</span></span> <span id="cb2-5"><a href="#cb2-5" aria-hidden="true" tabindex="-1"></a><span class="co">#> Call `lifecycle::last_lifecycle_warnings()` to see where this warning was generated.</span></span> <span id="cb2-6"><a href="#cb2-6" aria-hidden="true" tabindex="-1"></a>df2 <span class="ot"><-</span> <span class="fu">data_frame</span>(<span class="at">a =</span> <span class="st">"apple"</span>, <span class="at">b =</span> <span class="st">"banana"</span>)</span> <span id="cb2-7"><a href="#cb2-7" aria-hidden="true" tabindex="-1"></a><span class="co">#> Warning: `data_frame()` was deprecated in tibble 1.1.0.</span></span> <span id="cb2-8"><a href="#cb2-8" aria-hidden="true" tabindex="-1"></a><span class="co">#> ℹ Please use `tibble()` instead.</span></span></code></pre></div> <p>You’ll notice that the warning only appears the first time we call it — lifecycle only notifies you every 8 hours so it’s not overly disruptive if you’ve used a deprecated function in many places.</p> <p>So how do you track down exactly where the warning came from? Firstly, you might notice the deprecation warning message includes the advice to call <code>lifecycle::last_lifecycle_warnings()</code>. That’ll give you a list of all the deprecation warnings that have happened recently:</p> <div class="sourceCode" id="cb3"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a>lifecycle<span class="sc">::</span><span class="fu">last_lifecycle_warnings</span>()</span> <span id="cb3-2"><a href="#cb3-2" aria-hidden="true" tabindex="-1"></a><span class="co">#> [[1]]</span></span> <span id="cb3-3"><a href="#cb3-3" aria-hidden="true" tabindex="-1"></a><span class="co">#> <deprecated></span></span> <span id="cb3-4"><a href="#cb3-4" aria-hidden="true" tabindex="-1"></a><span class="co">#> message: `data_frame()` was deprecated in tibble 1.1.0.</span></span> <span id="cb3-5"><a href="#cb3-5" aria-hidden="true" tabindex="-1"></a><span class="co">#> Please use `tibble()` instead.</span></span> <span id="cb3-6"><a href="#cb3-6" aria-hidden="true" tabindex="-1"></a><span class="co">#> Backtrace:</span></span> <span id="cb3-7"><a href="#cb3-7" aria-hidden="true" tabindex="-1"></a><span class="co">#> 1. global::data_frame(x = 1)</span></span></code></pre></div> <p>Each warning comes with a back trace that shows you the full sequence of calls that lead to the deprecated function.</p> <p>Alternatively, if you’re ready to spend some time tracking down all your uses of deprecated functions, you can use the <code>lifecycle_verbosity</code> option to make deprecated functions warn every time:</p> <div class="sourceCode" id="cb4"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a><span class="fu">options</span>(<span class="at">lifecycle_verbosity =</span> <span class="st">"warning"</span>)</span> <span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a>df1 <span class="ot"><-</span> <span class="fu">data_frame</span>(<span class="at">x =</span> <span class="dv">1</span>, <span class="at">y =</span> <span class="dv">2</span>)</span> <span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a><span class="co">#> Warning: `data_frame()` was deprecated in tibble 1.1.0.</span></span> <span id="cb4-4"><a href="#cb4-4" aria-hidden="true" tabindex="-1"></a><span class="co">#> ℹ Please use `tibble()` instead.</span></span> <span id="cb4-5"><a href="#cb4-5" aria-hidden="true" tabindex="-1"></a>df2 <span class="ot"><-</span> <span class="fu">data_frame</span>(<span class="at">a =</span> <span class="st">"apple"</span>, <span class="at">b =</span> <span class="st">"banana"</span>)</span> <span id="cb4-6"><a href="#cb4-6" aria-hidden="true" tabindex="-1"></a><span class="co">#> Warning: `data_frame()` was deprecated in tibble 1.1.0.</span></span> <span id="cb4-7"><a href="#cb4-7" aria-hidden="true" tabindex="-1"></a><span class="co">#> ℹ Please use `tibble()` instead.</span></span></code></pre></div> <p>Then use <code>lifecycle::last_lifecycle_warnings()</code> to track down the source.</p> <p>Alternatively, if you want to be really strict, you can turn all deprecation warnings into errors, forcing you to deal with them immediately:</p> <div class="sourceCode" id="cb5"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a><span class="fu">options</span>(<span class="st">"lifecycle_verbosity"</span> <span class="ot">=</span> <span class="st">"error"</span>)</span> <span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a>df1 <span class="ot"><-</span> <span class="fu">data_frame</span>(<span class="at">x =</span> <span class="dv">1</span>, <span class="at">y =</span> <span class="dv">2</span>)</span> <span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a><span class="co">#> Error:</span></span> <span id="cb5-4"><a href="#cb5-4" aria-hidden="true" tabindex="-1"></a><span class="co">#> ! `data_frame()` was deprecated in tibble 1.1.0.</span></span> <span id="cb5-5"><a href="#cb5-5" aria-hidden="true" tabindex="-1"></a><span class="co">#> ℹ Please use `tibble()` instead.</span></span></code></pre></div> <!-- code folding --> <!-- dynamically load mathjax for compatibility with self-contained --> <script> (function () { var script = document.createElement("script"); script.type = "text/javascript"; script.src = "https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"; document.getElementsByTagName("head")[0].appendChild(script); })(); </script> </body> </html>