func/docs/installing_cli.md

Installing the CLI

The CLI is used to create, build and deploy functions. To use it, install one of the pre-built binaries, or compile from source.

From Homebrew

brew tap knative-sandbox/kn-plugins
brew install func

Prebuilt Binary

Download the latest binary appropriate for your system from the Latest Release.

Each version is built and made available as a prebuilt binary. See All Releases.

From Source

To build and install from source check out the repository, run make, and install the resultant binary:

make
mv func /usr/local/bin/

Integration with kn

See plugins section of kn