|  | 76 | ==== Upgrading from Trac 0.12 to Trac 1.0 ==== #to1.0 | 
                          |  | 77 |  | 
                          |  | 78 | The 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] | 
                          |  | 81 | tracopt.versioncontrol.svn.* = enabled | 
                          |  | 82 | }}} | 
                          |  | 83 | The upgrade procedure should take care of this and change the TracIni appropriately, unless you already had the svn components explicitly disabled. | 
                          |  | 84 |  | 
                          |  | 85 | Another 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. | 
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