42 lines
2.5 KiB
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42 lines
2.5 KiB
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>2.3.7.<2E>Recipe Logging Mechanisms</title>
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<link rel="stylesheet" type="text/css" href="../book.css">
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<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
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<link rel="home" href="index.html" title="The Yocto Project Reference Manual">
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<link rel="up" href="usingpoky-debugging.html" title="2.3.<2E>Debugging Build Failures">
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<link rel="prev" href="usingpoky-debugging-variables.html" title="2.3.6.<2E>Variables">
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<link rel="next" href="logging-with-python.html" title="2.3.7.1.<2E>Logging With Python">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="section" title="2.3.7.<2E>Recipe Logging Mechanisms">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="recipe-logging-mechanisms"></a>2.3.7.<2E>Recipe Logging Mechanisms</h3></div></div></div>
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<p>
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Best practices exist while writing recipes that both log build progress and
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act on build conditions such as warnings and errors.
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Both Python and Bash language bindings exist for the logging mechanism:
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" type="disc">
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<li class="listitem"><p><span class="emphasis"><em>Python:</em></span> For Python functions, BitBake
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supports several loglevels: <code class="filename">bb.fatal</code>,
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<code class="filename">bb.error</code>, <code class="filename">bb.warn</code>,
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<code class="filename">bb.note</code>, <code class="filename">bb.plain</code>,
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and <code class="filename">bb.debug</code>.</p></li>
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<li class="listitem"><p><span class="emphasis"><em>Bash:</em></span> For Bash functions, the same set
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of loglevels exist and are accessed with a similar syntax:
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<code class="filename">bbfatal</code>, <code class="filename">bberror</code>,
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<code class="filename">bbwarn</code>, <code class="filename">bbnote</code>,
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<code class="filename">bbplain</code>, and <code class="filename">bbdebug</code>.</p></li>
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</ul></div>
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<p>
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</p>
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<p>
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For guidance on how logging is handled in both Python and Bash recipes, see the
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<code class="filename">logging.bbclass</code> file in the
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<code class="filename">meta/classes</code> folder of the
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<a class="link" href="../dev-manual/source-directory.html" target="_self">Source Directory</a>.
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</p>
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</div></body>
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</html>
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