The installation itself is simple as:
$ helm plugin install https://github.com/hypnoglow/helm-s3.git
You can install a specific release version:
$ helm plugin install https://github.com/hypnoglow/helm-s3.git --version 0.16.0
To use the plugin, you do not need any special dependencies. The installer will download versioned release with prebuilt binary from github releases. However, if you want to build the plugin from source, or you want to contribute to the plugin, please see these instructions.
The plugin is also distributed as Docker images. Images are pushed to Docker Hub tagged with plugin release version and suffixed with Helm version. The image built from master branch is also available, note that it should be only used for playing and testing, it is strongly discouraged to use that image for production use cases. Refer to https://hub.docker.com/r/hypnoglow/helm-s3 for details and all available tags.