Development of the Rust syntax highlighting file for Kate and compatible editors has moved to the KTextEditor library (part of KDE Frameworks, and used by Kate and others) on kde.org.
To get it, grab a KDE Frameworks / KTextEditor release v5.11.0 or higher from https://download.kde.org or your distro, or:
Browse ktexteditor.git here: http://quickgit.kde.org/?p=ktexteditor.git
rust.xml is in src/syntax/data.
If you'd like to contribute a patch, use one of:
- https://git.reviewboard.kde.org/ (repository ktexteditor)
- https://bugs.kde.org (product frameworks-ktexteditor)
The license is MIT as per the Rust license, and preserved in the file.