meson/docs/markdown/snippets/dist_subproject.md

Packaging a subproject

The meson dist command can now create a distribution tarball for a subproject in the same git repository as the main project. This can be useful if parts of the project (e.g. libraries) can be built and distributed separately. In that case they can be moved into subprojects/mysub and running meson dist in that directory will now create a tarball containing only the source code from that subdir and not the rest of the main project or other subprojects.

For example:

git clone https://github.com/myproject
cd myproject/subprojects/mysubproject
meson builddir
meson dist -C builddir