Cliosoft SOS (https://www.cliosoft.com/products/sos/) is an

enterprise-grade source code management solution used throughout the

hardware industry. Its features are tailored to large, distributed teams

working with inter-dependent projects. It supports large files,

"packages" of related files that must be managed under a single

revision, general attribute metadata support, file locking, ACLs, sparse

checkouts, snapshots, and other feaures useful in enterprise settings.
Through a combination of RBTools 3.1+, Review Board 4.0.6+, Power Pack

5+, and SOS 7.20+, users will be able to configure Review Board to talk

to Cliosoft SOS repositories and post changes for review.
Users can post explicit selections for review, such as:
$ rbt post select:-scm
$ rbt post 'select:-sunm -sor -scm'

Or they can post SOS changelists (new in 7.20) by name:
$ rbt post my-changelist-name

The generated diff uses the DiffX (https://diffx.org) format, with

metadata specific to SOS. This is used to identify the workarea, SOS

Project, SOS Server, changelist ID, and RSO (Revision Search Order) that

was posted.
Some of this information is also returned during diff generation for

storage in the review request. This enables custom SOS fields in the

review request to show up, which will contain information useful to

reviewers and the owner to help determine which workarea and changelist

contains the changes.
That logic (along with get_tree_matches_review_request()) will also

enable smart matching of review requests for rbt post -u, which is

another change in development.
At the moment, this does not support posting files bundled as SOS

packages for review. That is planned for a subsequent release.
SOS 7.20 is required for this release, though the code has been written

to not strictly enforce this version yet, as some customers are using

patched builds of earlier releases that contain this support. In time,

we'll want to make 7.20 a hard requirement.
This work is a collaboration between Beanbag and Cliosoft. A big thanks

to them for all the testing, support, and all the new functionality

added to SOS 7.20 to make this integration happen.

All unit tests pass.
Extensively tested with a variety of types of changes in local SOS

workareas. This included:

Selection-based posting (default and custom selections)
Changeset-based posting
Included files and excluded patterns
Changed, added, and deleted files (referenced in selections and changesets)
Symlink changes (though this support still requires further work, and based

  on discussions with Cliosoft will be moved to a future release)
Verification that existing SOS selections are preserved after the

  operation completes.
Tested posting with rbt post -u (when combined with in-progress changes

  for smarter matching)