GSD 2.0 support
GSD 2.0 will be released next week. It introduces breaking changes to the file format to enable longer chunk names and better performance when reading and writing many small chunks which will be common in HOOMD v3.0. GSD 2.0 can read and write to GSD 1.0 files, but GSD 1.0 cannot read GSD 2.0 files.
The GSD 2.0 code is complete. Feel free to copy gsd.h and gsd.c from the gsd master branch to enable support for 2.0 files before the official release is tagged. The C API only introduces one breaking change: The meaning of the function return values differ from 1.x. All C API functions now return the same error codes which are labelled with the gsd_error enum: https://gsd.readthedocs.io/en/latest/changes.html
HOOMD-blue will start writing GSD 2.0 files with the 2.9 release: https://github.com/glotzerlab/hoomd-blue/issues/578 .