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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="On native: uses env_log"><meta name="keywords" content="rust, rustlang, rust-lang, setup"><title>abstutil::logger::setup - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><script src="../../crates.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc fn"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">☰</div><a href='../../abstutil/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class="location"><a href="../index.html">abstutil</a>::<wbr><a href="index.html">logger</a></p><div id="sidebar-vars" data-name="setup" data-ty="fn" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Function <a href="../index.html">abstutil</a>::<wbr><a href="index.html">logger</a>::<wbr><a class="fn" href="">setup</a></span><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span><a class="srclink" href="../../src/abstutil/logger.rs.html#38-49" title="goto source code">[src]</a></span></h1><pre class="rust fn">pub fn setup()</pre><div class="docblock"><h2 id="on-native-uses-env_log" class="section-header"><a href="#on-native-uses-env_log">On native: uses env_log</a></h2>
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<p>You can adjust the log level without recompiling with the RUST_LOG env variable.</p>
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<pre><code class="language-skip">RUST_LOG=debug cargo run --bin game
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</code></pre>
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<p>This can be done on a per lib basis:</p>
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<pre><code class="language-skip">RUST_LOG=my_lib=debug cargo run --bin game
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</code></pre>
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<p>Or a module-by-module basis:</p>
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<pre><code class="language-skip">RUST_LOG=my_lib::module=debug cargo run --bin game
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</code></pre>
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<p>You can mix and match:</p>
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<pre><code class="language-skip"># error logging by default, except the foo:bar module at debug level
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# and the entire baz crate at info level
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RUST_LOG=error,foo::bar=debug,baz=info cargo run --bin game
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</code></pre>
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<p>For some special cases, you might want to use regex matching by specifying a pattern with the
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“/”:</p>
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<pre><code class="language-skip"># only log once every 10k
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RUST_LOG="fast_paths=debug/contracted node [0-9]+0000 " mike import_la
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</code></pre>
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<h2 id="on-web-uses-console_log" class="section-header"><a href="#on-web-uses-console_log">On web: uses console_log</a></h2></div></section><section id="search" class="content hidden"></section><section class="footer"></section><div id="rustdoc-vars" data-root-path="../../" data-current-crate="abstutil" data-search-js="../../search-index.js"></div>
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