Use of parameters in provision_file()->symlink() is incorrect
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #1283854. -->
Reported by: [guypaddock](https://www.drupal.org/user/156932)
>>>
<p>The <code>provisionFileSystem::symlink()</code> method appears to use its parameters differently than its documentation and parameter names indicate.</p>
<!--break--><p>Below, I've included the method as it currently appears. It takes a moment to realize that <code>$target</code> is being used as the path where the symlink should be created, and <code>$path</code> is being used as the target of the symlink. </p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br> </span><span style="color: #FF8000">/**<br> * Create a symlink from $path to $target.<br> *<br> * Sets @path, @target, and @reason tokens for ->succeed and ->fail.<br> *<br> * @param $path<br> * The path you want to perform this operation on.<br> * @param $target<br> * The path you want the link to point to.<br> */<br> </span><span style="color: #007700">function </span><span style="color: #0000BB">symlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$path</span><span style="color: #007700">, </span><span style="color: #0000BB">$target</span><span style="color: #007700">) {<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">_clear_state</span><span style="color: #007700">();<br><br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">tokens </span><span style="color: #007700">= array(</span><span style="color: #DD0000">'@path' </span><span style="color: #007700">=> </span><span style="color: #0000BB">$path</span><span style="color: #007700">, </span><span style="color: #DD0000">'@target' </span><span style="color: #007700">=> </span><span style="color: #0000BB">$target</span><span style="color: #007700">);<br><br> if (</span><span style="color: #0000BB">file_exists</span><span style="color: #007700">(</span><span style="color: #0000BB">$target</span><span style="color: #007700">) && !</span><span style="color: #0000BB">is_link</span><span style="color: #007700">(</span><span style="color: #0000BB">$target</span><span style="color: #007700">)) {<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">tokens</span><span style="color: #007700">[</span><span style="color: #DD0000">'@reason'</span><span style="color: #007700">] = </span><span style="color: #0000BB">dt</span><span style="color: #007700">(</span><span style="color: #DD0000">"A file already exists at @path"</span><span style="color: #007700">);<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">last_status </span><span style="color: #007700">= </span><span style="color: #0000BB">FALSE</span><span style="color: #007700">;<br> }<br> elseif (</span><span style="color: #0000BB">is_link</span><span style="color: #007700">(</span><span style="color: #0000BB">$target</span><span style="color: #007700">) && (</span><span style="color: #0000BB">readlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$target</span><span style="color: #007700">) != </span><span style="color: #0000BB">$path</span><span style="color: #007700">)) {<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">tokens</span><span style="color: #007700">[</span><span style="color: #DD0000">'@reason'</span><span style="color: #007700">] = </span><span style="color: #0000BB">dt</span><span style="color: #007700">(</span><span style="color: #DD0000">"A symlink already exists at target, but it is pointing to @link"</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"@link" </span><span style="color: #007700">=> </span><span style="color: #0000BB">readlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$target</span><span style="color: #007700">)));<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">last_status </span><span style="color: #007700">= </span><span style="color: #0000BB">FALSE</span><span style="color: #007700">;<br> }<br> elseif (</span><span style="color: #0000BB">is_link</span><span style="color: #007700">(</span><span style="color: #0000BB">$target</span><span style="color: #007700">) && (</span><span style="color: #0000BB">readlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$target</span><span style="color: #007700">) == </span><span style="color: #0000BB">$path</span><span style="color: #007700">)) {<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">last_status </span><span style="color: #007700">= </span><span style="color: #0000BB">TRUE</span><span style="color: #007700">;<br> }<br> elseif (</span><span style="color: #0000BB">symlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$path</span><span style="color: #007700">, </span><span style="color: #0000BB">$target</span><span style="color: #007700">)) {<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">last_status </span><span style="color: #007700">= </span><span style="color: #0000BB">TRUE</span><span style="color: #007700">;<br> }<br> else {<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">tokens</span><span style="color: #007700">[</span><span style="color: #DD0000">'@reason'</span><span style="color: #007700">] = </span><span style="color: #0000BB">dt</span><span style="color: #007700">(</span><span style="color: #DD0000">'The symlink could not be created, an error has occured'</span><span style="color: #007700">);<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">last_status </span><span style="color: #007700">= </span><span style="color: #0000BB">FALSE</span><span style="color: #007700">;<br> }<br><br> return </span><span style="color: #0000BB">$this</span><span style="color: #007700">;<br> }<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>I would recommend swapping the names of both parameters (so their names match what they do, and the docs are correct), then swapping out which parameter is used throughout the code.</p>
<p>Like so:</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br> </span><span style="color: #FF8000">/**<br> * Create a symlink from $path to $target.<br> *<br> * Sets @path, @target, and @reason tokens for ->succeed and ->fail.<br> *<br> * @param $target<br> * The path you want the link to point to.<br> * @param $path<br> * The path you want to perform this operation on.<br> */<br> </span><span style="color: #007700">function </span><span style="color: #0000BB">symlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$target</span><span style="color: #007700">, </span><span style="color: #0000BB">$path</span><span style="color: #007700">) {<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">_clear_state</span><span style="color: #007700">();<br><br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">tokens </span><span style="color: #007700">= array(</span><span style="color: #DD0000">'@target' </span><span style="color: #007700">=> </span><span style="color: #0000BB">$target</span><span style="color: #007700">, </span><span style="color: #DD0000">'@path' </span><span style="color: #007700">=> </span><span style="color: #0000BB">$path</span><span style="color: #007700">);<br><br> if (</span><span style="color: #0000BB">file_exists</span><span style="color: #007700">(</span><span style="color: #0000BB">$path</span><span style="color: #007700">) && !</span><span style="color: #0000BB">is_link</span><span style="color: #007700">(</span><span style="color: #0000BB">$path</span><span style="color: #007700">)) {<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">tokens</span><span style="color: #007700">[</span><span style="color: #DD0000">'@reason'</span><span style="color: #007700">] = </span><span style="color: #0000BB">dt</span><span style="color: #007700">(</span><span style="color: #DD0000">"A file already exists at @path"</span><span style="color: #007700">);<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">last_status </span><span style="color: #007700">= </span><span style="color: #0000BB">FALSE</span><span style="color: #007700">;<br> }<br> elseif (</span><span style="color: #0000BB">is_link</span><span style="color: #007700">(</span><span style="color: #0000BB">$path</span><span style="color: #007700">) && (</span><span style="color: #0000BB">readlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$path</span><span style="color: #007700">) != </span><span style="color: #0000BB">$target</span><span style="color: #007700">)) {<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">tokens</span><span style="color: #007700">[</span><span style="color: #DD0000">'@reason'</span><span style="color: #007700">] = </span><span style="color: #0000BB">dt</span><span style="color: #007700">(</span><span style="color: #DD0000">"A symlink already exists at target, but it is pointing to @link"</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"@link" </span><span style="color: #007700">=> </span><span style="color: #0000BB">readlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$path</span><span style="color: #007700">)));<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">last_status </span><span style="color: #007700">= </span><span style="color: #0000BB">FALSE</span><span style="color: #007700">;<br> }<br> elseif (</span><span style="color: #0000BB">is_link</span><span style="color: #007700">(</span><span style="color: #0000BB">$path</span><span style="color: #007700">) && (</span><span style="color: #0000BB">readlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$path</span><span style="color: #007700">) == </span><span style="color: #0000BB">$target</span><span style="color: #007700">)) {<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">last_status </span><span style="color: #007700">= </span><span style="color: #0000BB">TRUE</span><span style="color: #007700">;<br> }<br> elseif (</span><span style="color: #0000BB">symlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$target</span><span style="color: #007700">, </span><span style="color: #0000BB">$path</span><span style="color: #007700">)) {<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">last_status </span><span style="color: #007700">= </span><span style="color: #0000BB">TRUE</span><span style="color: #007700">;<br> }<br> else {<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">tokens</span><span style="color: #007700">[</span><span style="color: #DD0000">'@reason'</span><span style="color: #007700">] = </span><span style="color: #0000BB">dt</span><span style="color: #007700">(</span><span style="color: #DD0000">'The symlink could not be created, an error has occured'</span><span style="color: #007700">);<br> </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">last_status </span><span style="color: #007700">= </span><span style="color: #0000BB">FALSE</span><span style="color: #007700">;<br> }<br><br> return </span><span style="color: #0000BB">$this</span><span style="color: #007700">;<br> }<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>This change should not break existing provision code, since the function of the parameters was swapped, and so was the parameter order.</p>
issue
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