Editing Wiki.tetrain.com Runbook (section)

=== 9.2 Extend further: ppt, pptx, tiff, bmp, docx, xlsx, ps, odt, ods, odp, odg ===

Before touching config, checked whether MediaWiki core already knows how to map each extension to a MIME type (the actual mapping source in this version is <code><nowiki>includes/libs/mime/MimeMap.php</nowiki></code> — '''not''' a flat <code><nowiki>mime.types</nowiki></code>/<code><nowiki>mime.info</nowiki></code> file):

<pre>
<nowiki>
grep -iE "'docx'|'xlsx'|'pptx'|'ppt'|'odt'|'ods'|'odp'|'odg'|'tiff'|'tif'|'bmp'|'ps'" \
  /var/www/wiki/includes/libs/mime/MimeMap.php
</nowiki>
</pre>

Confirmed: every one of these was already correctly mapped (e.g. <code><nowiki>'application/vnd.openxmlformats-officedocument.wordprocessingml.document' => [ 'docx' ]</nowiki></code>, <code><nowiki>'image/tiff' => [ 'tiff', 'tif' ]</nowiki></code>, <code><nowiki>'application/postscript' => [ 'ai', 'eps', 'ps' ]</nowiki></code>, etc.) — no core patching needed, only the extensions allowlist.

<pre>
<nowiki>
cp /var/www/wiki/LocalSettings.php /var/www/wiki/LocalSettings.php.bak.$(date +%Y%m%d%H%M%S)
</nowiki>
</pre>

Edit the line from 9.1 to:

<pre>
<nowiki>
$wgFileExtensions = array_merge( $wgFileExtensions ?? [ 'png', 'gif', 'jpg', 'jpeg' ],
  [ 'pdf', 'ppt', 'pptx', 'docx', 'xlsx', 'tiff', 'tif', 'bmp', 'ps', 'odt', 'ods', 'odp', 'odg' ] );
</nowiki>
</pre>

(Legacy <code><nowiki>doc</nowiki></code>/<code><nowiki>xls</nowiki></code> deliberately '''not''' added — not part of what was requested.)

'''Verify''': same <code><nowiki>siprop=fileextensions</nowiki></code> API check as 9.1; confirmed all 11 new extensions present, no httpd error-log entries after reload.

'''Known limitation, disclosed rather than silently shipped''': TIFF and PS files upload fine but render '''no thumbnail preview''' — the site's bitmap pipeline is GD, not ImageMagick (<code><nowiki>$wgUseImageMagick = false</nowiki></code>, unchanged from Phase 5), GD has no TIFF decoder, and no PostScript handler extension is installed (<code><nowiki>ls extensions/ | grep -iE 'tiff|postscript'</nowiki></code> → empty). Both formats behave like Office documents already do (download-only, generic file icon). Not fixed in this pass — flagged to the client as an open choice (add a TIFF/PS handler vs. accept upload-only) rather than guessed at.

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