Trac

= Summary =

October 12, 2018 tracvm was migrated to lxd container called tracsvn on osgeo7 As of February 2017 Trac 1.2.1dev (r15513 patched) is running at http://trac.osgeo.org/ (the tracsvn VM at OSU OSL).


 * Trac Guide
 * Configurations are in /var/www/trac/*/conf/trac.ini and inherit /etc/trac/trac-common.ini
 * All data lives under /var/www/trac and in trac_* PostgreSQL databases
 * Authentication uses the OSGeo LDAP database
 * virtual server configurations are under /etc/apache2/includes/trac/*.conf, included by /etc/apache2/sites-available/trac.conf
 * Existing Instances
 * Actual python is installed in /usr/local/lib/python2.6/dist-packages/Trac*.egg (May 2015)
 * Frank Warmerdam and Howard Butler have configuration experience, and can help maintain instances.
 * Sandro Santilli is helping with trac since late 2015, driving the upgrade from 1.0.5 to 1.2.1dev in Feb 2017

= Procedures =

Local Customizations
As of 2017-02-01, after upgrading to Trac-1.2.1, there is a minor modifications to allow notifying OSGeo users who have never logged into trac yet.

See https://trac.osgeo.org/osgeo/ticket/1863

Creating a trac instance
$ sudo -u postgres createdb -O trac trac_ $ sudo trac-admin \ /var/www/trac/env/ initenv \ --inherit=/etc/trac/trac-common.ini


 * Make sure to set the db connection to postgres://trac@/trac_ (password for the user is kept in ~www-data/.pgpass)
 * Use /var/www/svn/repos/ for the svn path or /var/www/git/repos/ for the git path
 * For SVN, write a /var/www/repos//post-commit with this content:

REPOS="$1" REV="$2" TRAC_ENV=`basename ${REPOS}` /var/www/svn/hookscripts/osgeo-post-commit-hook "${TRAC_ENV}" "${REPOS}" "${REV}" &


 * Set the project admin user:

$ sudo trac-admin /var/www/trac/ permission add  TRAC_ADMIN


 * Set permissions on the trac environment dir:

$ sudo chown -R www-data:www-data /var/www/trac/


 * Update /var/www/trac//conf/trac.ini to enable email notification (TODO: move to /etc/trac/trac-common.ini)
 * Add virtual host file /etc/apache2/conf.d/trac/.conf enabling LDAP based authentication.
 * Logo can be referenced in /var/www/trac//conf/trac.ini and placed in /var/www/trac//htdocs
 * Add to /var/www/trac/index.html
 * Add to /var/www/trac/trac_instances.txt
 * Add to /etc/trac/intertrac.ini
 * Regenerate the robots.txt file with the command:

$ sudo /var/www/trac/mkrobots.sh

Permissions
Recommended Trac permissions: anonymous      BROWSER_VIEW anonymous      CHANGESET_VIEW anonymous      FILE_VIEW anonymous      LOG_VIEW anonymous      MILESTONE_VIEW anonymous      REPORT_SQL_VIEW anonymous      REPORT_VIEW anonymous      ROADMAP_VIEW anonymous      SEARCH_VIEW anonymous      TICKET_VIEW anonymous      TIMELINE_VIEW anonymous      WIKI_VIEW authenticated  TICKET_CHGPROP authenticated  TICKET_CREATE authenticated  TICKET_MODIFY authenticated  WIKI_CREATE authenticated  WIKI_MODIFY developers     DOXYGEN_VIEW developers     MILESTONE_ADMIN developers     REPORT_ADMIN developers     REPORT_CREATE developers     WIKI_ADMIN warmerdam      developers warmerdam      TRAC_ADMIN strk           TRAC_ADMIN ...

SQL Compatability Issue with Postgres

You will have to modify the SQL statement of the All Ticket by Milestone report. This can be done by accessing the trac report page and click the Edit report button (You need to be an admin of the trac instance). Check the sql statement of another trac instance and replace the one of the new instance.

Permissions Reference

Plugins
Shared plugins are installed in /usr/local/lib/python2.6/dist-packages/ (usually having a name starting with "Trac") and need be explicitly enabled for each project (can be done by trac admin).

Project specific plugins (discouraged) are under /var/www/trac/ /plugins/ and are enabled by default.

For more info see the plugin install guide.

Available shared plugins (updated May '16):


 * TracLDAPEmailResolverPlugin 0.1 - uses LDAP lookup to resolve OSGeo users email. WORKS with Trac 1.2
 * TracStatsPlugin 0.6 - shows project statistics. WORKS with Trac 1.2
 * TracSpamFilter 1.0.10dev - spam filtering plugin. WORKS with Trac 1.2
 * TracDoxygen 0.11.0 - mix doxygen docs into trac interface (needs extra admin support). . WORKS with Trac 1.2
 * TracSectionEditPlugin 1.2.0dev - ability to edit one section in a wiki page. WORKS with Trac 1.2
 * TracTocMacro 11.0.0.6 - multi page tables of contents. WORKS with Trac 1.2
 * TracSecureTickets 0.1.4 - The authz policy mechanism provides fine-grained permissions for tickets. REMOVED in Jan 2017
 * Tracticketsstats 3.0.0dev - visualizes trac ticket statistics REMOVED in Jan 2017
 * TracAdvParseArgsPlugin 1.0.5 - dependency of TicketStatsMacro REMOVED in Jan 2017
 * sensitivetickets 0.22 (deprecated by SecureTicketsPlugin ?) REMOVED in Jan 2017
 * MediaWikiMacro - provides media wiki like format support (link? details?) NOT FOUND as of Nov 2015
 * TracMetrixPlugin 0.1.8dev - quality metrix and progress statistics. REMOVED in Jan 2017 as it FAILED with Trac 1.2 - https://trac-hacks.org/ticket/13041

Custom fields
See http://trac.edgewall.org/wiki/TracTicketsCustomFields

for example, in trac.ini:

[ticket-custom] platform = select platform.label = Platform platform.options = Unspecified|MSWindows 2K|MSWindows XP|MSWindows Vista|MSWindows CygWin|MacOSX|Linux|Other Unix|All platform.value = Unspecified

cpu = select cpu.label = CPU cpu.options = Unspecified|x86-32|x86-64|OSX/PPC|OSX/Intel|Other|All cpu.value = Unspecified

ZIP support for directories
Docs: https://trac.edgewall.org/wiki/TracIni#browser-section

Used in GRASS GIS trac instance to enable zip download support for g.extension addon manager downloads: Directories are to be enabled as a comma separated list.

[browser] downloadable_paths = /grass-addons/grass7/*/*,/sandbox/*/*
 * 1) file: /var/www/trac/grass/conf/trac.ini

Making Trac Read-Only
It appears the usual way of making Trac read-only is to remove all permissions on the "authenticated" group in the Admin/Permissions dialog. This will remove the authenticated group and then only those with special admin priviledges can edit the wiki, create tickets, etc.

Timeline with filename indication
[timeline] changeset_long_messages = false changeset_show_files = 1 changeset_files_count = 3 default_daysback = 30 ticket_show_details = false

(see for example here)

Hotcopy a trac instance
$ sudo trac-admin /var/www/html/trac/ hotcopy /path/to/copy/trac/to

= Trac Spam =

We have had problems with trac spam when ticket create and ticket modify permissions were set to anonymous (the default). To get around this most (all?) instances have been changed to require authenticated users to do these actions.

But some projects strongly desire to support anonymous ticket creation and modification and at some point this might be viable using image captcha technology to keep out the spammers. A Trac plugin for this is currently installed, see SpamFilter for usage.

SpamFilter management
The bare minimum that each instance admin should take care of:


 * Edit of a BadContent page, made read-only, for example: https://trac.osgeo.org/XXXX/wiki/BadContent
 * Frequently check the monitoring page training bayes for ham/spam: https://trac.osgeo.org/XXXX/admin/spamfilter/monitor

A global SpamFilter configuration is used unless any instance admin changed the configuration via the GUI ("Apply Changes"). The global configuration (in /etc/trac/spamfilter.ini) sets, other than the defaults:


 * SessionFilterStrategy: 0
 * Karma of authenticated users: 0

Instructions to delete a spam user from LDAP: see SAC:LDAP

= Trac notification forward to project mailing list =

To fwd notifications from trac to e.g. a project developers mailing list, you need to
 * set in trac the mailing list address as default (trac Admin section)
 * add the trac@osgeo.org address (or trac_osgeo@.., or ...) in Mailman to
 * "Privacy options"
 * "Subscription rules"
 * "[Sender filters]"
 * "Non-member filters"
 * "List of non-member addresses whose postings should be automatically accepted."


 * As the mail may be addressed to "undisclosed recipients" instead of directly to the list, the messages may be held for moderator approval. To avoid this add "undisclosed recipients" to the list of acceptable aliases at
 * "Privacy options"
 * "[Recipient filters]"
 * acceptable_aliases