Changes between Version 2 and Version 3 of TracUpgrade


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Timestamp:
Jan 25, 2009 10:55:11 AM (10 years ago)
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trac
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  • TracUpgrade

    v2 v3  
    22[[TracGuideToc]] 
    33 
    4 A Trac environment sometimes needs to be upgraded before it can be used with a new version of Trac. This document describes the steps necessary to upgrade an environment. 
     4A [TracEnvironment Trac environment] needs to be upgraded before it can be used with Trac 0.11. This document describes the steps necessary to upgrade an environment. 
    55 
    6  '''Note''': ''Environment upgrades are not necessary for minor version releases unless otherwise noted. For example, there's no need to upgrade a Trac environment created with (or upgraded) 0.8.0 when installing 0.8.4 (or any other 0.8.x release).'' 
     6Environment upgrades are not necessary for minor version releases unless otherwise noted.  
    77 
    8 == General Instructions == 
     8== Instructions == 
    99 
    1010Typically, there are four steps involved in upgrading to a newer version of Trac: 
    … …  
    1212=== Update the Trac Code === 
    1313 
    14 Get the new version of Trac, either by downloading an offical release package or by checking it out from the [http://projects.edgewall.com/trac/wiki/SubversionRepository Subversion repository]. 
     14Get the new version as described in TracInstall, or your operating system specific procedure. 
    1515 
    16 If you have a source distribution, you need to run 
    17 {{{ 
    18 python setup.py install 
    19 }}} 
     16If you do a manual (not operating system specific) upgrade, you may also later on want to remove the existing Trac code by deleting the `trac` directory from the Python `lib/site-packages` directory. 
    2017 
    21 to install the new version. If you've downloaded the Windows installer, you execute it, and so on. 
     18The location of the site-packages directory depends on the operating system, and the location in which Python was installed. However, the following locations are common: 
     19 * If you’re using Linux: /usr/lib/python2.X/site-packages 
     20 * If you’re using Windows: C:\Python2.X\lib\site-packages 
     21 * If you’re using MacOSX: /Library/Python2.X/site-packages 
    2222 
    23 In any case, if you're doing a major version upgrade (such as from 0.8 to 0.9), it is ''highly'' recommended that you first remove the existing Trac code. To do this, you need to delete the `trac` directory from the Python `lib/site-packages` directory. You may also want to remove the Trac `cgi-bin`, `htdocs` and `templates` directories that are commonly found in a directory called `share/trac` (the exact location depends on your platform). 
     23You may also want to remove the Trac `cgi-bin`, `htdocs`, `templates` and `wiki-default` directories that are commonly found in a directory called `share/trac` (the exact location depends on your platform). 
     24 
     25If you had the webadmin plugin installed, you can now uninstall it as it is now part of the Trac code base. 
    2426 
    2527=== Upgrade the Trac Environment === 
    2628 
    27 Unless noted otherwise, upgrading between major versions (such as 0.8 and 0.9) involves changes to the database schema, and possibly the layout of the [wiki:TracEnvironment environment directory]. Fortunately, Trac provides automated upgrade scripts to ease the pain. These scripts are run via [wiki:TracAdmin trac-admin]: 
     29After restarting, Trac should show the instances which need a manual upgrade via the automated upgrade scripts to ease the pain. These scripts are run via [TracAdmin trac-admin]: 
    2830{{{ 
    2931trac-admin /path/to/projenv upgrade 
    3032}}} 
    3133 
    32 This command will do nothing if the environment is already up-to-date. [[BR]] 
     34This command will do nothing if the environment is already up-to-date. 
     35 
     36Note that if you are using a PostgreSQL database, this command will fail with the message that the environment can only be backed up when you use an SQLite database. This means that you will have to backup the repository and the database manually. Then, to perform the actual upgrade, run: 
     37{{{ 
     38trac-admin /path/to/projenv upgrade --no-backup 
     39}}} 
     40 
     41If you are using custom CSS styles or modified templates in the templates directory of the TracEnvironment, you will need to convert them to the Genshi way of doing things. To continue to use your style sheet, follow the instructions at TracInterfaceCustomization#SiteAppearance. 
    3342 
    3443=== Update the Trac Documentation === 
    3544 
    36 Every [wiki: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, [wiki:TracAdmin trac-admin] provides a command to upgrade the documentation: 
     45Every [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: 
    3746{{{ 
    3847trac-admin /path/to/projenv wiki upgrade 
    … …  
    4150Note that this procedure will of course leave your `WikiStart` page intact. 
    4251 
     52=== Trac Macros, Plugins === 
     53The Trac macros will need to be adapted, as the old-style wiki-macros are not supported anymore (due to the drop of ClearSilver and the HDF); they need to be converted to the new-style macros, see WikiMacros. When they are converted to the new style, they need to be placed into the plugins directory instead and not wiki-macros, which is no longer scanned for macros or plugins. 
     54 
    4355=== Restart the Web Server === 
     56If you are not running [wiki:TracCgi CGI], reload the new Trac code by restarting your web server. 
    4457 
    45 In order to reload the new Trac code you will need to restart your web server (note this is not necessary for plain old CGI, although CGI is discouraged for performance reasons). 
     58== Known Issues == 
     59=== parent dir === 
     60If you use a trac parent env configuration and one of the plugins in one child does not work, none of the children work. 
     61=== some core modules won't load ===  
     62This can happen in particular with Python 2.3 on Windows when upgrading without uninstalling first. 
     63Some modules were previously capitalized and were changed to lower case, e.g. trac/About.py became trac/about.py. You may find such messages in the Trac log: 
     64{{{ 
     65ERROR: Skipping "trac.about = trac.about": (can't import "No module named about") 
     66}}} 
     67Remove the `Lib/site-packages/trac` folder and reinstall. 
     68=== Wiki Upgrade === 
     69`trac-admin` will not delete or remove pages that were in version 0.10 but now are not in version 0.11, such as WikiMacros. 
    4670 
    47 == Specific Versions == 
     71== Changing Database Backend == 
     72== SQLite to PostgreSQL == 
    4873 
    49 The following sections discuss any extra actions that may need to be taken to upgrade to specific versions of Trac. 
     74The [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 
    5075 
    51 == From 0.8.x to 0.9 == 
     76== Older Versions == 
    5277 
    53 If you're using [wiki:TracCgi CGI] you will want to update your `Alias` to the Trac htdocs static resources.  See the documentation on [wiki:TracCgi#MappingStaticResources mapping static resources] for an example on how to configure this. 
    54  
    55 [wiki:TracFastCgi FastCGI] and [wiki:TracModPython mod_python] users can safely remove any `Alias`es to the Trac htdocs folder since this is no longer used by default. 
    56  
    57 [wiki:TracModPython mod_python] users will also need to change the name of the mod_python handler in the Apache HTTPD configuration: 
    58 {{{ 
    59    from: PythonHandler trac.ModPythonHandler 
    60    to:   PythonHandler trac.web.modpython_frontend 
    61 }}} 
    62  
    63 If you have [http://initd.org/tracker/pysqlite PySQLite] 2.x installed, Trac will now try to open your SQLite database using the SQLite 3.x file format. The database formats used by SQLite 2.8.x and SQLite 3.x are incompatible. If you get an error like ''“file is encrypted or is not a database”'' after upgrading, then you must convert your database file. 
    64  
    65 To do this, you need to have both SQLite 2.8.x and SQLite 3.x installed (they have different filenames so can coexist on the same system). Then use the following commands: 
    66 {{{ 
    67  $ mv trac.db trac2.db 
    68  $ sqlite trac2.db .dump | sqlite3 trac.db 
    69 }}} 
    70  
    71 After testing that the conversion was successful, the `trac2.db` file can be deleted. For more information on the SQLite upgrade see http://www.sqlite.org/version3.html. 
    72  
    73 == From 0.7.x to 0.8 == 
    74  
    75 0.8 adds a new roadmap feature which requires additional permissions. While a 
    76 fresh installation will by default grant ROADMAP_VIEW and MILESTONE_VIEW 
    77 permissions to anonymous, these permissions have to be granted manually when 
    78 upgrading: 
    79 {{{ 
    80  $ trac-admin /path/to/projectenv permission add anonymous MILESTONE_VIEW 
    81  $ trac-admin /path/to/projectenv permission add anonymous ROADMAP_VIEW 
    82 }}} 
     78For upgrades from former versions refer to wiki:0.10/TracUpgrade. 
    8379 
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