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reference/check_app_version.html
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<!DOCTYPE html>
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<!-- Generated by pkgdown: do not edit by hand --><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><title>Run a startup version check and return a banner UI element — check_app_version • FreesearchR</title><!-- favicons --><link rel="icon" type="image/png" sizes="96x96" href="../favicon-96x96.png"><link rel="icon" type="”image/svg+xml”" href="../favicon.svg"><link rel="apple-touch-icon" sizes="180x180" href="../apple-touch-icon.png"><link rel="icon" sizes="any" href="../favicon.ico"><link rel="manifest" href="../site.webmanifest"><script src="../deps/jquery-3.6.0/jquery-3.6.0.min.js"></script><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><link href="../deps/bootstrap-5.3.1/bootstrap.min.css" rel="stylesheet"><script src="../deps/bootstrap-5.3.1/bootstrap.bundle.min.js"></script><link href="../deps/Montserrat-0.4.10/font.css" rel="stylesheet"><link href="../deps/Public_Sans-0.4.10/font.css" rel="stylesheet"><link href="../deps/font-awesome-6.5.2/css/all.min.css" rel="stylesheet"><link href="../deps/font-awesome-6.5.2/css/v4-shims.min.css" rel="stylesheet"><script src="../deps/headroom-0.11.0/headroom.min.js"></script><script src="../deps/headroom-0.11.0/jQuery.headroom.min.js"></script><script src="../deps/bootstrap-toc-1.0.1/bootstrap-toc.min.js"></script><script src="../deps/clipboard.js-2.0.11/clipboard.min.js"></script><script src="../deps/search-1.0.0/autocomplete.jquery.min.js"></script><script src="../deps/search-1.0.0/fuse.min.js"></script><script src="../deps/search-1.0.0/mark.min.js"></script><!-- pkgdown --><script src="../pkgdown.js"></script><link href="../extra.css" rel="stylesheet"><meta property="og:title" content="Run a startup version check and return a banner UI element — check_app_version"><meta name="description" content="Call this outside server() – typically in
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global.R or at the top of app.R – and embed the returned
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value directly in your UI definition. Because the check runs at startup
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the banner is present on first render with no loading delay, and no
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uiOutput() / renderUI() wiring is needed."><meta property="og:description" content="Call this outside server() – typically in
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global.R or at the top of app.R – and embed the returned
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value directly in your UI definition. Because the check runs at startup
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the banner is present on first render with no loading delay, and no
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uiOutput() / renderUI() wiring is needed."><meta property="og:image" content="https://agdamsbo.github.io/FreesearchR/logo.png"><script defer src="https://stats.freesearchr.org/script.js" data-website-id="85bfd1e8-2cbe-4a4a-aa34-1dfb2960905b"></script></head><body>
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<a href="#main" class="visually-hidden-focusable">Skip to contents</a>
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<nav class="navbar navbar-expand-lg fixed-top bg-primary" data-bs-theme="dark" aria-label="Site navigation"><div class="container">
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<a class="navbar-brand me-2" href="../index.html">FreesearchR</a>
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<small class="nav-text text-muted me-auto" data-bs-toggle="tooltip" data-bs-placement="bottom" title="">26.3.4</small>
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<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbar" aria-controls="navbar" aria-expanded="false" aria-label="Toggle navigation">
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</button>
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<div id="navbar" class="collapse navbar-collapse ms-3">
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<ul class="navbar-nav me-auto"><li class="nav-item"><a class="nav-link" href="../articles/FreesearchR.html">Get started</a></li>
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<li class="active nav-item"><a class="nav-link" href="../reference/index.html">Reference</a></li>
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<li><a class="dropdown-item" href="../articles/visuals.html">On visuals</a></li>
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<li class="nav-item"><a class="nav-link" href="../news/index.html">Changelog</a></li>
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</ul><ul class="navbar-nav"><li class="nav-item"><form class="form-inline" role="search">
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<input class="form-control" type="search" name="search-input" id="search-input" autocomplete="off" aria-label="Search site" placeholder="Search for" data-search-index="../search.json"></form></li>
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<li class="nav-item"><a class="external-link nav-link" href="https://github.com/agdamsbo/FreesearchR/" aria-label="GitHub"><span class="fa fab fa-github fa-lg"></span></a></li>
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</div>
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</nav><div class="container template-reference-topic">
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<div class="row">
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<main id="main" class="col-md-9"><div class="page-header">
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<img src="../logo.png" class="logo" alt=""><h1>Run a startup version check and return a banner UI element</h1>
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<small class="dont-index">Source: <a href="https://github.com/agdamsbo/FreesearchR/blob/main/R/version_check.R" class="external-link"><code>R/version_check.R</code></a></small>
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<div class="d-none name"><code>check_app_version.Rd</code></div>
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</div>
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<div class="ref-description section level2">
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<p>Call this <strong>outside</strong> <code>server()</code> – typically in
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<code>global.R</code> or at the top of <code>app.R</code> – and embed the returned
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value directly in your UI definition. Because the check runs at startup
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the banner is present on first render with no loading delay, and no
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<code>uiOutput()</code> / <code>renderUI()</code> wiring is needed.</p>
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</div>
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<div class="section level2">
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<h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
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<div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">check_app_version</span><span class="op">(</span></span>
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<span> <span class="va">github_user</span>,</span>
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<span> <span class="va">github_repo</span>,</span>
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<span> app_version <span class="op">=</span> <span class="cn">NULL</span>,</span>
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<span> verbose <span class="op">=</span> <span class="cn">FALSE</span></span>
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<span><span class="op">)</span></span></code></pre></div>
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</div>
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<div class="section level2">
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<h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>
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<dl><dt id="arg-github-user">github_user<a class="anchor" aria-label="anchor" href="#arg-github-user"></a></dt>
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<dd><p>GitHub username or organisation that owns the repository.</p></dd>
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<dt id="arg-github-repo">github_repo<a class="anchor" aria-label="anchor" href="#arg-github-repo"></a></dt>
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<dd><p>Repository name. Also used as the package name for
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<code><a href="https://rdrr.io/r/utils/packageDescription.html" class="external-link">utils::packageVersion()</a></code>.</p></dd>
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<dt id="arg-app-version">app_version<a class="anchor" aria-label="anchor" href="#arg-app-version"></a></dt>
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<dd><p>Optional fallback version string for environments where
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the package is not installed (e.g. shinyapps.io). Pass the result of your
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<code>app_version()</code> function here. Ignored when <code><a href="https://rdrr.io/r/utils/packageDescription.html" class="external-link">packageVersion()</a></code>
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succeeds.</p></dd>
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<dt id="arg-verbose">verbose<a class="anchor" aria-label="anchor" href="#arg-verbose"></a></dt>
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<dd><p>Logical; if <code>TRUE</code> a banner is always returned.
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Defaults to <code>FALSE</code>.</p></dd>
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</dl></div>
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<div class="section level2">
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<h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
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<p>A <code><a href="https://dreamrs.github.io/shinyWidgets/reference/bootstrap-utils.html" class="external-link">shinyWidgets::alert()</a></code> UI element, or <code>NULL</code> when there
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is nothing to show (up to date in non-verbose mode).</p>
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</div>
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<div class="section level2">
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<h2 id="details">Details<a class="anchor" aria-label="anchor" href="#details"></a></h2>
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<p><strong>Normal mode</strong> (<code>verbose = FALSE</code>): returns a banner only when
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a newer version is available or when the check fails. Returns <code>NULL</code>
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when the app is up to date (Shiny silently ignores <code>NULL</code> in the UI).</p>
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<p><strong>Verbose / debug mode</strong> (<code>verbose = TRUE</code>): always returns a
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banner – including a success banner when up to date – so you can confirm
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the check ran and inspect both version strings during development.</p>
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</div>
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<div class="section level2">
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<h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2>
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<div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="kw">if</span> <span class="op">(</span><span class="cn">FALSE</span><span class="op">)</span> <span class="op">{</span> <span class="co"># \dontrun{</span></span></span>
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<span class="r-in"><span><span class="co"># global.R or top of app.R</span></span></span>
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<span class="r-in"><span><span class="kw"><a href="https://rdrr.io/r/base/source.html" class="external-link">source</a></span><span class="op">(</span><span class="st">"version_check.R"</span><span class="op">)</span></span></span>
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<span class="r-in"><span><span class="va">version_banner</span> <span class="op"><-</span> <span class="fu">check_app_version</span><span class="op">(</span></span></span>
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<span class="r-in"><span> github_user <span class="op">=</span> <span class="st">"my-org"</span>,</span></span>
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<span class="r-in"><span> github_repo <span class="op">=</span> <span class="st">"my-shiny-app"</span>,</span></span>
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<span class="r-in"><span> app_version <span class="op">=</span> <span class="fu">app_version</span><span class="op">(</span><span class="op">)</span> <span class="co"># fallback for shinyapps.io</span></span></span>
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<span class="r-in"><span><span class="op">)</span></span></span>
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<span class="r-in"><span></span></span>
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<span class="r-in"><span><span class="co"># ui.R</span></span></span>
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<span class="r-in"><span><span class="fu">fluidPage</span><span class="op">(</span></span></span>
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<span class="r-in"><span> <span class="va">version_banner</span>,</span></span>
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<span class="r-in"><span> <span class="co"># ... rest of UI</span></span></span>
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<span class="r-in"><span><span class="op">)</span></span></span>
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<span class="r-in"><span></span></span>
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<span class="r-in"><span><span class="co"># Verbose mode for development</span></span></span>
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<span class="r-in"><span><span class="va">version_banner</span> <span class="op"><-</span> <span class="fu">check_app_version</span><span class="op">(</span></span></span>
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<span class="r-in"><span> github_user <span class="op">=</span> <span class="st">"my-org"</span>,</span></span>
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<span class="r-in"><span> github_repo <span class="op">=</span> <span class="st">"my-shiny-app"</span>,</span></span>
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<span class="r-in"><span> app_version <span class="op">=</span> <span class="fu">app_version</span><span class="op">(</span><span class="op">)</span>,</span></span>
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<span class="r-in"><span> verbose <span class="op">=</span> <span class="cn">TRUE</span></span></span>
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<span class="r-in"><span><span class="op">)</span></span></span>
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<span class="r-in"><span><span class="op">}</span> <span class="co"># }</span></span></span>
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</code></pre></div>
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</div>
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</main><aside class="col-md-3"><nav id="toc" aria-label="Table of contents"><h2>On this page</h2>
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</nav></aside></div>
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<footer><div class="pkgdown-footer-left">
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<p>Site built with <a href="https://pkgdown.r-lib.org/" class="external-link">pkgdown</a> 2.2.0.</p>
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</div>
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<div class="pkgdown-footer-right">
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<p>Developed by Andreas Gammelgaard Damsbo. Provided without <strong>any warranty</strong>.</p>
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</div>
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</footer></div>
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