Allow to retrieve a list of modules defining a certain .info file property
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #624848. -->
Reported by: [sun](https://www.drupal.org/user/54136)
>>>
<p>Last-minute spin-off from <span class="drupalorg-gitlab-issue-link project-issue-status-info project-issue-status-5"><a href="https://www.drupal.org/project/admin_menu/issues/623544" title="Status: Closed (won't fix)">#623544: How to categorize a module as developer module</a></span>:</p>
<pre># module_list_by_info('taxonomy', array('dependencies'));<br>array(3) {<br> ["default"]=><br> string(6) "Drupal"<br> ["forum"]=><br> string(5) "Forum"<br> ["taxonomy_test"]=><br> string(20) "Taxonomy test module"<br>}</pre><pre># module_list_by_info(TRUE, array('required'));<br>array(11) {<br> ["default"]=><br> string(6) "Drupal"<br> ["field"]=><br> string(5) "Field"<br> ["field_sql_storage"]=><br> string(17) "Field SQL storage"<br> ["filter"]=><br> string(6) "Filter"<br> ["list"]=><br> string(4) "List"<br> ["node"]=><br> string(4) "Node"<br> ["number"]=><br> string(6) "Number"<br> ["options"]=><br> string(7) "Options"<br> ["system"]=><br> string(6) "System"<br> ["text"]=><br> string(4) "Text"<br> ["user"]=><br> string(4) "User"<br>}</pre><p>Our goal is to introduce the new .info file property "tags" <strong>in contrib</strong> during the D7 release cycle to build some awesomesauce - especially for <code>admin/structure/modules</code> (and more):</p>
<pre>tags[] = administration<br>tags[] = development<br>tags[] = ...</pre><p>The first module that will actually use this function is Administration menu (see above mentioned issue). It provides a setting that allows to enable/disable all "developer modules" in one click (to save a lot of performance when a site is not under active development).</p>
<p>If we want to, we could additionally remove/convert all calls to <a href="http://api.drupal.org/api/function/drupal_required_modules/7">http://api.drupal.org/api/function/drupal_required_modules/7</a> to this new function, i.e. make it conditionally parse .info files in the filesystem instead of querying the database, in case the database is not yet available (primarily targeting the installer). However, that wouldn't strictly be necessary.</p>
<p>There are countless of use-cases for this thingy, and the purpose for now is to just allow contributed modules to gather that info easily without having to re-implement this function all over again.</p>
>>> [!note] Pre-migration files
- [drupal.module-list-by-info.patch](https://www.drupal.org/files/issues/drupal.module-list-by-info.patch)
>>>
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