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Changes between Version 3 and Version 4 of TracUpgrade


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Timestamp:
Jul 22, 2013, 11:37:02 PM (11 years ago)
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trac
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  • TracUpgrade

    v3 v4  
    11= Upgrade Instructions =
    22[[TracGuideToc]]
     3[[PageOutline(2-4,,inline,unnumbered)]]
    34
    45== Instructions ==
    … …  
    67Typically, there are seven steps involved in upgrading to a newer version of Trac:
    78
    8 === 1. Update the Trac Code === #UpdatetheTracCode
     9=== 1. Bring your server off-line
     10
     11It is not a good idea to update a running server: the server processes may have parts of the current packages cached in memory, and updating the code will likely trigger [#ZipImportError internal errors].
     12
     13=== 2. Update the Trac Code === #UpdatetheTracCode
    914
    1015Get the new version as described in TracInstall, or your operating system specific procedure.
    … …  
    2833This cleanup is not mandatory, but makes it easier to troubleshoot issues later on, as you won't waste your time looking at code or templates from a previous release that are not being used anymore... As usual, make a backup before actually deleting things.
    2934
    30 === 2. Upgrade the Trac Environment === #UpgradetheTracEnvironment
     35=== 3. Upgrade the Trac Environment === #UpgradetheTracEnvironment
    3136
    3237Environment upgrades are not necessary for minor version releases unless otherwise noted.
    … …  
    4550}}}
    4651
    47 === 3. Update the Trac Documentation === #UpdatetheTracDocumentation
     52=== 4. Update the Trac Documentation === #UpdatetheTracDocumentation
    4853
    4954Every [TracEnvironment Trac environment] includes a copy of the Trac documentation for the installed version. As you probably want to keep the included documentation in sync with the installed version of Trac, [TracAdmin trac-admin] provides a command to upgrade the documentation:
    … …  
    5459Note that this procedure will leave your `WikiStart` page intact.
    5560
    56 === 4. Resynchronize the Trac Environment Against the Source Code Repository ===
    57 
    58 Each [TracEnvironment Trac environment] must be resynchronized against the source code repository in order to avoid errors such as "[http://trac.edgewall.org/ticket/6120 No changeset ??? in the repository]" while browsing the source through the Trac interface:
    59 
    60 {{{
    61 trac-admin /path/to/projenv repository resync '*'
    62 }}}
    6361
    6462=== 5. Refresh static resources ===
    … …  
    7068this will extract static resources and CGI scripts (`trac.wsgi`, etc) from new Trac version and its plugins into `/deploy/path`.
    7169
    72 Some web browsers cache CSS and Javascript files persistently, so you may need to instruct your users to manually erase the contents of their browser's cache.
     70Some web browsers (IE, Opera) cache CSS and Javascript files aggressively, so you may need to instruct your users to manually erase the contents of their browser's cache, a forced refreshed (`<F5>`) should be enough.
     71{{{#!comment
     72Remove above note once #9936 is fixed.
     73}}}
    7374
    7475=== 6. Steps specific to a given Trac version  ===
     76==== Upgrading from Trac 0.12 to Trac 1.0 ==== #to1.0
     77
     78The Trac components for Subversion support are no longer enabled by default. To enable the svn support, you need to make sure the `tracopt.versioncontrol.svn` components are enabled, for example by setting the following in the TracIni:
     79{{{
     80[components]
     81tracopt.versioncontrol.svn.* = enabled
     82}}}
     83The upgrade procedure should take care of this and change the TracIni appropriately, unless you already had the svn components explicitly disabled.
     84
     85Another step in the automatic upgrade will change the way the attachments are stored. If you're a bit paranoid, you might want to take a backup of the `attachments` directory before upgrading (but if you are, you already did a full copy of the environment, no?). In case the `attachments` directory contains some files which are //not// attachments, the last step of the migration to the new layout will fail: the deletion of the now unused `attachments` directory can't be done if there are still files and folders in it. You may ignore this error, but better go have a look to these files, move them elsewhere and remove the `attachments` directory manually to cleanup the environment. The attachments themselves are now all located in your environment below the `files/attachments` directory.
     86
     87
    7588==== Upgrading from Trac 0.11 to Trac 0.12 ====
     89
    7690===== Python 2.3 no longer supported =====
    7791The minimum supported version of python is now 2.4
    … …  
    87101
    88102This may be of interest to users with only one repository, since there's now a way to avoid the potentially costly resync check at every request.
     103
     104===== Resynchronize the Trac Environment Against the Source Code Repository =====
     105
     106Each [TracEnvironment Trac environment] must be resynchronized against the source code repository in order to avoid errors such as "[http://trac.edgewall.org/ticket/6120 No changeset ??? in the repository]" while browsing the source through the Trac interface:
     107
     108{{{
     109trac-admin /path/to/projenv repository resync '*'
     110}}}
    89111
    90112===== Improved repository synchronization =====
    … …  
    127149== Known Issues ==
    128150
    129 === parent dir ===
    130 If you use a trac parent env configuration and one of the plugins in one child does not work, none of the children work.
     151Things you should pay attention to, while upgrading.
     152
     153=== Customized Templates
     154
     155Trac supports customization of its Genshi templates by placing copies of the templates in the `<env>/templates` folder of your [TracEnvironment environment] or in a common location specified in the [[TracIni#GlobalConfiguration| [inherit] templates_dir]] configuration setting. If you choose to do so, be wary that you will need to repeat your changes manually on a copy of the new templates when you upgrade to a new release of Trac (even a minor one), as the templates will likely evolve. So keep a diff around ;-)
     156
     157The preferred way to perform TracInterfaceCustomization is to write a custom plugin doing an appropriate `ITemplateStreamFilter` transformation, as this is more robust in case of changes: we usually won't modify element `id`s or change CSS `class`es, and if we have to do so, this will be documented in the TracDev/ApiChanges pages.
     158
     159=== !ZipImportError ===
     160
     161Due to internal caching of zipped packages,  whenever the content of the packages change on disk, the in-memory zip index will no longer match and you'll get irrecoverable !ZipImportError errors. Better anticipate and bring your server down for maintenance before upgrading.
     162See [trac:#7014] for details.
    131163
    132164=== Wiki Upgrade ===
    … …  
    137169A known issue in some versions of PySqlite (2.5.2-2.5.4) prevents the trac-admin upgrade script from successfully upgrading the database format. It is advised to use either a newer or older version of the sqlite python bindings to avoid this error. For more details see ticket [trac:#9434].
    138170
    139 == Upgrading Python ==
     171=== parent dir ===
     172If you use a trac parent env configuration and one of the plugins in one child does not work, none of the children work.
     173
     174== Related topics
     175
     176=== Upgrading Python ===
    140177
    141178Upgrading Python to a newer version will require reinstallation of Python packages: Trac of course; also [http://pypi.python.org/pypi/setuptools easy_install], if you've been using that.  Assuming you're using Subversion, you'll also need to upgrade the Python bindings for svn.
    142179
    143 === Windows and Python 2.6 ===
     180==== Windows and Python 2.6 ====
    144181
    145 If you've been using !CollabNet's Subversion package, you may need to uninstall that in favor of [http://alagazam.net/ Algazam], which has the Python bindings readily available (see TracSubversion).  The good news is, that works with no tweaking.
     182If you've been using !CollabNet's Subversion package, you may need to uninstall that in favor of [http://alagazam.net/ Alagazam], which has the Python bindings readily available (see TracSubversion).  The good news is, that works with no tweaking.
    146183
    147 == Changing Database Backend ==
    148 === SQLite to PostgreSQL ===
     184=== Changing Database Backend ===
     185==== SQLite to PostgreSQL ====
    149186
    150187The [http://trac-hacks.org/wiki/SqliteToPgScript sqlite2pg] script on [http://trac-hacks.org trac-hacks.org] has been written to assist in migrating a SQLite database to a PostgreSQL database
    151188
    152 == Older Versions ==
     189=== Upgrading from older versions of Trac === #OlderVersions
    153190
    154191For upgrades from versions older than Trac 0.10, refer first to [trac:wiki:0.10/TracUpgrade#SpecificVersions].