RELEASE-NOTES-1.27

   1 Security reminder: If you have PHP's register_globals option set, you must
   2 turn it off. MediaWiki will not work with it enabled.
   3
   4 == MediaWiki 1.27 ==
   5
   6 THIS IS NOT A RELEASE YET
   7
   8 MediaWiki 1.27 is an alpha-quality branch and is not recommended for use in
   9 production.
  10
  11 === Configuration changes in 1.27 ===
  12 * $wgUseLinkNamespaceDBFields was removed.
  13 * Deprecated $wgResourceLoaderMinifierStatementsOnOwnLine and
  14   $wgResourceLoaderMinifierMaxLineLength, because there was little value in
  15   making the behavior configurable. The default values (`false` for the former,
  16   1000 for the latter) are now hard-coded.
  17 * $wgDebugDumpSqlLength was removed (deprecated in 1.24).
  18 * $wgDebugDBTransactions was removed (deprecated in 1.20).
  19 * $wgUseXVO has been removed, as it provides functionality only used by
  20   custom Wikimedia patches against Squid 2.x that probably noone uses in
  21   production anymore. There is now $wgUseKeyHeader that provides similar
  22   functionality but instead of the MediaWiki-specific X-Vary-Options header,
  23   uses the draft Key header standard.
  24 * $wgScriptExtension (and support for '.php5' entry points) was removed. See the
  25   deprecation notice in the release notes for version 1.25 for advice on how to
  26   preserve support for '.php5' entry points via URL rewriting.
  27 * Password handling via the User object has been deprecated and partially
  28   removed, pending the future introduction of AuthManager. In particular:
  29 ** expirePassword(), getPasswordExpireDate(), resetPasswordExpiration(), and
  30    getPasswordExpired() have been removed. They were unused outside of core.
  31 ** The mPassword, mNewpassword, mNewpassTime, and mPasswordExpires fields are
  32    now private and will be removed in the future.
  33 ** The getPassword() and getTemporaryPassword() methods now throw
  34    BadMethodCallException and will be removed in the future.
  35 ** The ability to pass 'password' and 'newpassword' to createNew() has been
  36    removed. The only users of it seem to have been using it to set invalid
  37    passwords, and so shouldn't be greatly affected.
  38 ** setPassword(), setInternalPassword(), and setNewpassword() have been
  39    deprecated, pending the introduction of AuthManager.
  40 ** User::randomPassword() is deprecated in favor of a new method
  41    PasswordFactory::generateRandomPasswordString()
  42 ** User::getPasswordFactory() is deprecated, callers should just create a
  43    PasswordFactory themselves.
  44 ** A new constructor, User::newSystemUser(), has been added to simplify the
  45    creation of passwordless "system" users for logged actions.
  46 * $wgMaxSquidPurgeTitles was removed.
  47 * $wgAjaxWatch was removed. This is now enabled by default.
  48 * (T27397) WebP is enabled by default as an uploadable filetype
  49
  50 === New features in 1.27 ===
  51 * $wgDataCenterId and $wgDataCenterRoles where added, which will serve as
  52   basic configuration settings needed for multi-datacenter setups.
  53   $wgDataCenterUpdateStickTTL was also added.
  54 * Added a new hook, 'UserMailerTransformContent', to transform the contents
  55   of an email. This is similar to the EmailUser hook but applies to all mail
  56   sent via UserMailer.
  57 * Added a new hook, 'UserMailerTransformMessage', to transform the contents
  58   of an emai after MIME encoding.
  59 * Added a new hook, 'UserMailerSplitTo', to control which users have to be
  60   emailed separately (ie. there is a single address in the To: field) so
  61   user-specific changes to the email can be applied safely.
  62 * $wgCdnMaxageLagged was added, which limits the CDN cache TTL
  63   when any load balancer uses a DB that is lagged beyond the 'max lag'
  64   setting in the relevant section of $wgLBFactoryConf.
  65 * User::newSystemUser() may be used to simplify the creation of passwordless
  66   "system" users for logged actions from scripts and extensions.
  67 * Extensions can now return detailed error information via the API when
  68   preventing user actions using 'getUserPermissionsErrors' and similar hooks
  69   by using ApiMessage instances instead of strings for the $result value.
  70
  71 ==== External libraries ====
  72
  73 === Bug fixes in 1.27 ===
  74
  75 === Action API changes in 1.27 ===
  76 * Added list=allrevisions.
  77 * generator=recentchanges now has the option to generate revids.
  78 * ApiPageSet::setRedirectMergePolicy() was added. This allows generator
  79   modules to define how generator data for a redirect source gets merged
  80   into the redirect destination.
  81 * prop=imageinfo&iiprop=uploadwarning will no longer include the possibility of
  82   "was-deleted" warning.
  83 * Added difftotextpst to query=revisions which preforms a pre-save transform on
  84   the text before diffing it.
  85
  86 === Action API internal changes in 1.27 ===
  87 * ApiQueryORM removed.
  88
  89 === Languages updated in 1.27 ===
  90
  91 MediaWiki supports over 350 languages. Many localisations are updated
  92 regularly. Below only new and removed languages are listed, as well as
  93 changes to languages because of Bugzilla reports.
  94
  95 === Other changes in 1.27 ===
  96 * ProfilerOutputUdp was removed. Note that there is a ProfilerOutputStats class.
  97 * WikiPage::doDeleteArticleReal() and WikiPage::doDeleteArticle() now
  98   ignore the 2nd and 3rd arguments (formerly $id and $commit).
  99 * Removed "loaderScripts" option from ResourceLoaderFileModule class.
 100 * Removed ORM-like wrapper added in 1.20.
 101
 102 == Compatibility ==
 103
 104 MediaWiki 1.27 requires PHP 5.3.3 or later. There is experimental support for
 105 HHVM 3.3.0.
 106
 107 MySQL is the recommended DBMS. PostgreSQL or SQLite can also be used, but
 108 support for them is somewhat less mature. There is experimental support for
 109 Oracle and Microsoft SQL Server.
 110
 111 The supported versions are:
 112
 113 * MySQL 5.0.3 or later
 114 * PostgreSQL 8.3 or later
 115 * SQLite 3.3.7 or later
 116 * Oracle 9.0.1 or later
 117 * Microsoft SQL Server 2005 (9.00.1399)
 118
 119 == Upgrading ==
 120
 121 1.27 has several database changes since 1.26, and will not work without schema
 122 updates. Note that due to changes to some very large tables like the revision
 123 table, the schema update may take quite long (minutes on a medium sized site,
 124 many hours on a large site).
 125
 126 If upgrading from before 1.11, and you are using a wiki as a commons
 127 repository, make sure that it is updated as well. Otherwise, errors may arise
 128 due to database schema changes.
 129
 130 If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
 131 new database fields are filled with data.
 132
 133 If you are upgrading from MediaWiki 1.4.x or earlier, you should upgrade to
 134 1.5 first. The upgrade script maintenance/upgrade1_5.php has been removed
 135 with MediaWiki 1.21.
 136
 137 Don't forget to always back up your database before upgrading!
 138
 139 See the file UPGRADE for more detailed upgrade instructions.
 140
 141 For notes on 1.26.x and older releases, see HISTORY.
 142
 143 == Online documentation ==
 144
 145 Documentation for both end-users and site administrators is available on
 146 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 147 for pages that explicitly state that their contents are in the public domain):
 148
 149        https://www.mediawiki.org/wiki/Documentation
 150
 151 == Mailing list ==
 152
 153 A mailing list is available for MediaWiki user support and discussion:
 154
 155        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 156
 157 A low-traffic announcements-only list is also available:
 158
 159        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 160
 161 It's highly recommended that you sign up for one of these lists if you're
 162 going to run a public MediaWiki, so you can be notified of security fixes.
 163
 164 == IRC help ==
 165
 166 There's usually someone online in #mediawiki on irc.freenode.net.