https://bugzilla.wikimedia.org/show_bug.cgi?id=61341

            Bug ID: 61341
           Summary: action=raw&templates=expand does not expand extension
                    tag parameters
           Product: MediaWiki
           Version: 1.22.1
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Unprioritized
         Component: Parser
          Assignee: wikibugs-l@lists.wikimedia.org
          Reporter: fuujuhi-...@noekeon.org
       Web browser: ---
   Mobile Platform: ---

action=raw&templates=expand should return the source code of a page, with
templates within the page expanded. However, if these templates contains
extension tag that contains template parameters as value, these parameters are
not expanded.

For instance, take extension RawFile
(http://www.mediawiki.org/wiki/Extension:RawFile). This extension introduce a
tag <file>:

  <file name="myfile" tag="pre">download</file>
  <pre>some text</pre>

When parsed, this tag generates HTML that allows downloading easily the content
of the <pre> block.

Now lets create a template {{download}}:

  <file name="{{{name}}}" tag="source">download</file>
  {{{content}}}

If I create a page with as content:

  {{download|name=myfile|content=<pre>
  some text
  </pre>

Then downloading that page with ?action=raw&templates=expand would produce:

  <file name="{{{name}}}" tag="source">download</file>
  <pre>
  some text
  </pre>

When I would in fact expect:

  <file name="myfile" tag="source">download</file>
  <pre>
  some text
  </pre>

The strange thing is that the non-replacement only occurs if the tag is indeed
a registered tag. If the tag is not known, then all template parameters are
replace as in regular wikitext.


I think this the same problem that requires tag parser hook to call
$parser->recursiveTagParse( $text, $frame ) to have template parameters
expanded. I would recommend to expand recursively as well with option
templates=expand, or at least foresee another option (like templates=recurse or
template=expandrecurse) that would do the same.

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