Document external libraries changes in release notes

Bug: T1355
Change-Id: If3432d513e053742ef09f1330604e57918ab90b2

diff --git a/RELEASE-NOTES-1.25 b/RELEASE-NOTES-1.25
index caf29f0..21d3c88 100644 (file)
--- a/RELEASE-NOTES-1.25
+++ b/RELEASE-NOTES-1.25
@@ -60,6 +60,31 @@ production.
   and images for ApiOpenSearch output. The semantics are identical to the
   "OpenSearchXml" hook provided by the OpenSearchXml extension.
 
+==== External libraries ====
+* MediaWiki now requires certain external libraries to be installed. In the past
+  these were bundled inside the git repository of MediaWiki core, but now they
+  need to be installed separately. For users using the tarball, this will be taken
+  care of and no action will be required. Users using git will either need to use
+  composer to fetch dependencies or use the mediawiki/vendor repository which includes
+  all dependencies for MediaWiki core and ones used in Wikimedia deployment. Detailed
+  instructions can be found at <https://www.mediawiki.org/wiki/Download_from_Git#Fetch_external_libraries>.
+* The following libraries are now required:
+** psr/log 1.0.0
+*** This library provides the interfaces set by the PSR-3 standard (<http://www.php-fig.org/psr/psr-3/>)
+    which are used by MediaWiki interally by the MWLogger class.
+*** See the structured logging RfC (<https://www.mediawiki.org/wiki/Requests_for_comment/Structured_logging>)
+    for more background information.
+** cssjanus/cssjanus 1.1.1
+*** This library was formerly bundled with MediaWiki core and has now been removed. It automatically
+    flips CSS for RTL support.
+** leafo/lessphp 0.5.0
+*** This library was formerly bundled with MediaWiki core and has now been removed. It compiles LESS
+    files into CSS.
+** cdb/cdb 1.0.0
+*** This library was formerly a part of MediaWiki core, and has now been split out into a separate library.
+    It provides CDB functions which are used in the Interwiki and Localization caches. More information
+    about the library can be found at <https://www.mediawiki.org/wiki/CDB>.
+
 === Bug fixes in 1.25 ===
 * (bug 71003) No additional code will be generated to try to load CSS-embedded
   SVG images in Internet Explorer 6 and 7, as they don't support them anyway.