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XDG Base Directory Specification helpers.
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<p>See the <a href="https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html">XDG Base Directory Specification</a> for more information.</p>
<section id="overview" class="level2">
<h2 class="anchored" data-anchor-id="overview">Overview</h2>
<p><a href="https://fastcore.fast.ai/xdg.html#xdg_cache_home"><code>xdg_cache_home</code></a>, <a href="https://fastcore.fast.ai/xdg.html#xdg_config_home"><code>xdg_config_home</code></a>, <a href="https://fastcore.fast.ai/xdg.html#xdg_data_home"><code>xdg_data_home</code></a>, and <a href="https://fastcore.fast.ai/xdg.html#xdg_state_home"><code>xdg_state_home</code></a> return <code>pathlib.Path</code> objects containing the value of the environment variable named <code>XDG_CACHE_HOME</code>, <code>XDG_CONFIG_HOME</code>, <code>XDG_DATA_HOME</code>, and <code>XDG_STATE_HOME</code> respectively, or the default defined in the specification if the environment variable is unset, empty, or contains a relative path rather than absolute path.</p>
<p><a href="https://fastcore.fast.ai/xdg.html#xdg_config_dirs"><code>xdg_config_dirs</code></a> and <a href="https://fastcore.fast.ai/xdg.html#xdg_data_dirs"><code>xdg_data_dirs</code></a> return a list of <code>pathlib.Path</code> objects containing the value, split on colons, of the environment variable named <code>XDG_CONFIG_DIRS</code> and <code>XDG_DATA_DIRS</code> respectively, or the default defined in the specification if the environment variable is unset or empty. Relative paths are ignored, as per the specification.</p>
<p><a href="https://fastcore.fast.ai/xdg.html#xdg_runtime_dir"><code>xdg_runtime_dir</code></a> returns a <code>pathlib.Path</code> object containing the value of the <code>XDG_RUNTIME_DIR</code> environment variable, or <code>None</code> if the environment variable is not set, or contains a relative path rather than absolute path.</p>
</section>
<section id="helpers" class="level2">
<h2 class="anchored" data-anchor-id="helpers">Helpers</h2>
<p>We’ll start by defining a context manager that temporarily sets an environment variable to demonstrate the behaviour of each helper function:</p>
<div id="567eb80b" class="cell">
<div class="sourceCode cell-code" id="cb1"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="im">from</span> contextlib <span class="im">import</span> contextmanager</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<div id="156e7a8b" class="cell">
<div class="sourceCode cell-code" id="cb2"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="at">@contextmanager</span></span>
<span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a><span class="kw">def</span> env(variable, value):</span>
<span id="cb2-3"><a href="#cb2-3" aria-hidden="true" tabindex="-1"></a> old <span class="op">=</span> os.environ.get(variable, <span class="va">None</span>)</span>
<span id="cb2-4"><a href="#cb2-4" aria-hidden="true" tabindex="-1"></a> <span class="cf">try</span>:</span>
<span id="cb2-5"><a href="#cb2-5" aria-hidden="true" tabindex="-1"></a> os.environ[variable] <span class="op">=</span> value</span>
<span id="cb2-6"><a href="#cb2-6" aria-hidden="true" tabindex="-1"></a> <span class="cf">yield</span></span>
<span id="cb2-7"><a href="#cb2-7" aria-hidden="true" tabindex="-1"></a> <span class="cf">finally</span>:</span>
<span id="cb2-8"><a href="#cb2-8" aria-hidden="true" tabindex="-1"></a> <span class="cf">if</span> old <span class="kw">is</span> <span class="va">None</span>: <span class="kw">del</span> os.environ[variable]</span>
<span id="cb2-9"><a href="#cb2-9" aria-hidden="true" tabindex="-1"></a> <span class="cf">else</span>: os.environ[variable] <span class="op">=</span> old</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/xdg.py#L25" target="_blank" style="float:right; font-size:smaller">source</a></p>
<section id="xdg_cache_home" class="level3">
<h3 class="anchored" data-anchor-id="xdg_cache_home">xdg_cache_home</h3>
<blockquote class="blockquote">
<pre><code> xdg_cache_home ()</code></pre>
</blockquote>
<p><em>Path corresponding to <code>XDG_CACHE_HOME</code></em></p>
<div id="2d732690" class="cell">
<div class="sourceCode cell-code" id="cb4"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a><span class="im">from</span> fastcore.test <span class="im">import</span> <span class="op">*</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<div id="ad31affd" class="cell">
<div class="sourceCode cell-code" id="cb5"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a>test_eq(xdg_cache_home(), Path.home()<span class="op">/</span><span class="st">'.cache'</span>)</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a><span class="cf">with</span> env(<span class="st">'XDG_CACHE_HOME'</span>, <span class="st">'/home/fastai/.cache'</span>):</span>
<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a> test_eq(xdg_cache_home(), Path(<span class="st">'/home/fastai/.cache'</span>))</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/xdg.py#L30" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="xdg_config_dirs" class="level3">
<h3 class="anchored" data-anchor-id="xdg_config_dirs">xdg_config_dirs</h3>
<blockquote class="blockquote">
<pre><code> xdg_config_dirs ()</code></pre>
</blockquote>
<p><em>Paths corresponding to <code>XDG_CONFIG_DIRS</code></em></p>
<div id="10414109" class="cell">
<div class="sourceCode cell-code" id="cb7"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a>test_eq(xdg_config_dirs(), [Path(<span class="st">'/etc/xdg'</span>)])</span>
<span id="cb7-2"><a href="#cb7-2" aria-hidden="true" tabindex="-1"></a><span class="cf">with</span> env(<span class="st">'XDG_CONFIG_DIRS'</span>, <span class="st">'/home/fastai/.xdg:/home/fastai/.config'</span>):</span>
<span id="cb7-3"><a href="#cb7-3" aria-hidden="true" tabindex="-1"></a> test_eq(xdg_config_dirs(), [Path(<span class="st">'/home/fastai/.xdg'</span>), Path(<span class="st">'/home/fastai/.config'</span>)])</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/xdg.py#L35" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="xdg_config_home" class="level3">
<h3 class="anchored" data-anchor-id="xdg_config_home">xdg_config_home</h3>
<blockquote class="blockquote">
<pre><code> xdg_config_home ()</code></pre>
</blockquote>
<p><em>Path corresponding to <code>XDG_CONFIG_HOME</code></em></p>
<div id="b552f35b" class="cell">
<div class="sourceCode cell-code" id="cb9"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb9-1"><a href="#cb9-1" aria-hidden="true" tabindex="-1"></a>test_eq(xdg_config_home(), Path.home()<span class="op">/</span><span class="st">'.config'</span>)</span>
<span id="cb9-2"><a href="#cb9-2" aria-hidden="true" tabindex="-1"></a><span class="cf">with</span> env(<span class="st">'XDG_CONFIG_HOME'</span>, <span class="st">'/home/fastai/.config'</span>):</span>
<span id="cb9-3"><a href="#cb9-3" aria-hidden="true" tabindex="-1"></a> test_eq(xdg_config_home(), Path(<span class="st">'/home/fastai/.config'</span>))</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/xdg.py#L40" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="xdg_data_dirs" class="level3">
<h3 class="anchored" data-anchor-id="xdg_data_dirs">xdg_data_dirs</h3>
<blockquote class="blockquote">
<pre><code> xdg_data_dirs ()</code></pre>
</blockquote>
<p><em>Paths corresponding to XDG_DATA_DIRS`</em></p>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/xdg.py#L45" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="xdg_data_home" class="level3">
<h3 class="anchored" data-anchor-id="xdg_data_home">xdg_data_home</h3>
<blockquote class="blockquote">
<pre><code> xdg_data_home ()</code></pre>
</blockquote>
<p><em>Path corresponding to <code>XDG_DATA_HOME</code></em></p>
<div id="b9b9897e" class="cell">
<div class="sourceCode cell-code" id="cb12"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb12-1"><a href="#cb12-1" aria-hidden="true" tabindex="-1"></a>test_eq(xdg_data_home(), Path.home()<span class="op">/</span><span class="st">'.local/share'</span>)</span>
<span id="cb12-2"><a href="#cb12-2" aria-hidden="true" tabindex="-1"></a><span class="cf">with</span> env(<span class="st">'XDG_DATA_HOME'</span>, <span class="st">'/home/fastai/.data'</span>):</span>
<span id="cb12-3"><a href="#cb12-3" aria-hidden="true" tabindex="-1"></a> test_eq(xdg_data_home(), Path(<span class="st">'/home/fastai/.data'</span>))</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/xdg.py#L50" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="xdg_runtime_dir" class="level3">
<h3 class="anchored" data-anchor-id="xdg_runtime_dir">xdg_runtime_dir</h3>
<blockquote class="blockquote">
<pre><code> xdg_runtime_dir ()</code></pre>
</blockquote>
<p><em>Path corresponding to <code>XDG_RUNTIME_DIR</code></em></p>
<hr>
<p><a href="https://github.com/fastai/fastcore/blob/master/fastcore/xdg.py#L56" target="_blank" style="float:right; font-size:smaller">source</a></p>
</section>
<section id="xdg_state_home" class="level3">
<h3 class="anchored" data-anchor-id="xdg_state_home">xdg_state_home</h3>
<blockquote class="blockquote">
<pre><code> xdg_state_home ()</code></pre>
</blockquote>
<p><em>Path corresponding to <code>XDG_STATE_HOME</code></em></p>
<div id="5b4f6a9f" class="cell">
<div class="sourceCode cell-code" id="cb15"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb15-1"><a href="#cb15-1" aria-hidden="true" tabindex="-1"></a>test_eq(xdg_state_home(), Path.home()<span class="op">/</span><span class="st">'.local/state'</span>)</span>
<span id="cb15-2"><a href="#cb15-2" aria-hidden="true" tabindex="-1"></a><span class="cf">with</span> env(<span class="st">'XDG_STATE_HOME'</span>, <span class="st">'/home/fastai/.state'</span>):</span>
<span id="cb15-3"><a href="#cb15-3" aria-hidden="true" tabindex="-1"></a> test_eq(xdg_state_home(), Path(<span class="st">'/home/fastai/.state'</span>))</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<hr>
<p>Copyright © 2016-2021 Scott Stevenson <a href="mailto:scott@stevenson.io" class="email">scott@stevenson.io</a></p>
<p>Modifications copyright © 2022 onwards Jeremy Howard</p>
</section>
</section>
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