The entire generator code is contained in Program.cs. CMake creates targets for building and running the generator. After running CMake, run
make generator
and
make database
to compile the generator and (re)build the timezone database header file, respectively.
Building the generator requires Visual Studio and/or MonoDevelop. Visual Studio is available for Windows and Mac; MonoDevelop is availabile for Linux.
To reduce the file size of the database, change StartTime and StopTime in Program.cs. The smaller the window, the smaller the file size.
Another option for reducing file size is filtering out un-needed timezones. For example, you may not need the Antartica timezones...
As noted on the main page, this generator uses NodaTime.