[[4.3] Allow creating of name.min.css

[jgerman-bot]

New language relevant PR in upstream repo: joomla/joomla-cms#38987 Here are the upstream changes:

Click to expand the diff!

diff --git a/administrator/components/com_templates/src/Controller/TemplateController.php b/administrator/components/com_templates/src/Controller/TemplateController.php
index a99ae5ae088b..2fe94826e708 100644
--- a/administrator/components/com_templates/src/Controller/TemplateController.php
+++ b/administrator/components/com_templates/src/Controller/TemplateController.php
@@ -479,7 +479,7 @@ public function createFile()
             $this->setMessage(Text::_('COM_TEMPLATES_INVALID_FILE_TYPE'), 'error');
             $url = 'index.php?option=com_templates&view=template&id=' . $id . '&file=' . $file . '&isMedia=' . $this->input->getInt('isMedia', 0);
             $this->setRedirect(Route::_($url, false));
-        } elseif (!preg_match('/^[a-zA-Z0-9-_]+$/', $name)) {
+        } elseif (!preg_match('/^(?!\.)(?!.*\.$)(?!.*\.\.)[a-zA-Z0-9_.]+$/', $name)) {
             $this->setMessage(Text::_('COM_TEMPLATES_INVALID_FILE_NAME'), 'error');
             $url = 'index.php?option=com_templates&view=template&id=' . $id . '&file=' . $file . '&isMedia=' . $this->input->getInt('isMedia', 0);
             $this->setRedirect(Route::_($url, false));
@@ -672,7 +672,7 @@ public function renameFile()
             $this->setMessage(Text::_('COM_TEMPLATES_ERROR_RENAME_ASSET_FILE'), 'warning');
             $url = 'index.php?option=com_templates&view=template&id=' . $id . '&file=' . $file . '&isMedia=' . $isMedia;
             $this->setRedirect(Route::_($url, false));
-        } elseif (!preg_match('/^[a-zA-Z0-9-_]+$/', $newName)) {
+        } elseif (!preg_match('/^(?!\.)(?!.*\.$)(?!.*\.\.)[a-zA-Z0-9_.]+$/', $newName)) {
             $this->setMessage(Text::_('COM_TEMPLATES_INVALID_FILE_NAME'), 'error');
             $url = 'index.php?option=com_templates&view=template&id=' . $id . '&file=' . $file . '&isMedia=' . $isMedia;
             $this->setRedirect(Route::_($url, false));
diff --git a/administrator/language/en-GB/com_templates.ini b/administrator/language/en-GB/com_templates.ini
index dcb919cc3e1d..5676096fd17c 100644
--- a/administrator/language/en-GB/com_templates.ini
+++ b/administrator/language/en-GB/com_templates.ini
@@ -155,7 +155,7 @@ COM_TEMPLATES_HOME_HEADING="Select a File"
 COM_TEMPLATES_HOME_TEXT="You can select from a number of options to customise the look of your templates. The Template Manager supports Source files, Image files, Font files, Zip archives and most of the operations that can be performed on those files. Select a file and you are good to go. Check the documentation if you want to know more."
 COM_TEMPLATES_IMAGE_HEIGHT="Height"
 COM_TEMPLATES_IMAGE_WIDTH="Width"
-COM_TEMPLATES_INVALID_FILE_NAME="Invalid file name. Please choose a file name with a-z, A-Z, 0-9, - and _."
+COM_TEMPLATES_INVALID_FILE_NAME="Invalid file name. Please choose a file name with a-z, A-Z, 0-9, ., - and _."
 COM_TEMPLATES_INVALID_FILE_TYPE="File type not selected."
 COM_TEMPLATES_INVALID_FOLDER_NAME="Invalid folder name. Please choose a folder name with a-z, A-Z, 0-9, - and _."
 COM_TEMPLATES_LAYOUTS_DIFFVIEW_CORE="Show Original File"