Trac - Add ticket cross-referencing support

[TemptorSent]

Trac currently lacks the ability to cross-reference tickets in a useful manner. Module needs to be installed/enabled for bidirectional cross-references (per strk)

[strk]

See ​https://trac.edgewall.org/wiki/TracCrossReferences

[strk]

Regina this is the plugin I was talking about yesterday in chat. It would let us simplify cross-referencing tickets like #3089 and #2731 which right now require two manual comments (one on each)

[strk]

Milestone renamed

[strk]

The plan is to install whatever required plugin or configuration via ansible, with work started in #2731

[strk]

A plugin providing what we are after is ​https://pypi.org/project/TracTicketReferencePlugin/

[strk]

The TracTicketReferencePlugin plugin is now in staging, deployed via ansible (see ​https://git.osgeo.org/gitea/sac/ansible-deployment/commit/35f977ea7c4a20c4e07e10a3abc71f01fc1a371c)

I could not test it properly as I cannot login in the staging Trac (see #3248)

[strk]

I deployed the plugin in production and tested there but it failed with error:

TracError: Unable to check for upgrade of ticketref.api.TicketRefsPlugin: TypeError: environment_needs_upgrade() takes exactly 2 arguments (1 given)

[strk]

The plugin is indeed unmaintained so probably not a good choice: ​https://trac-hacks.org/wiki/TracTicketReferencePlugin

[strk]

I've filed an upstream ticket anyway: ​https://trac-hacks.org/ticket/14354#ticket

[strk]

Possible alternatives: ​https://trac-hacks.org/tags/backlink

[strk]

References #2731

[strk]

Ref #2731

[strk]

refs #2731

[strk]

refs #2732

[strk]

refs #2733, #2734

[strk]

ref #1000, #1001