The conda package specification includes the package name (i.e. singa), version and build string (could be very long). To install a certain Singa package we run

conda install -c nusdbsystem singa=<version>=<build string>

It is inconvenient to type all 3 parts when running the installation commands. The meta.yml file in this folder is to create a conda package singa-gpu as an alias of one specific Singa package. It does nothing except creating a dummy conda package that depends on one real gpu version singa package. For example, the following line in meta.yml indicates that singa-gpu depends on singa with version 1.1.1, python version=3.6, cuda version=9 and cudnn version = 7.1.2

- singa 1.1.1 py36_cuda9.0_cudnn7.1.2

Therefore, when we run

conda install -c nusdbsystem singa-gpu

The dependent Singa package will be installed. By default, singa-gpu depends on the latest Singa (py3.6) on the latest cuda (and cudnn). When we have a new Singa version available, we need to update the meta.yml file to change the dependency.

To build this package and upload it

conda config --add channels nusdbsystem
conda build .
anaconda -t $ANACONDA_UPLOAD_TOKEN upload -u nusdbsystem -l main <path to the singa-cpu package>

where $ANACONDA_UPLOAD_TOKEN is the upload token associated with nusdbsystem account on anaconda cloud.