install-libusb-mac.sh

#!/bin/bash
set -e

ARCH=$(uname -m)

# install brew if required
if [[ $(command -v brew) == "" ]]; then
  echo "Installing Homebrew"
  /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
  if [[ $SHELL == "/bin/zsh" ]]; then
    RC_FILE="$HOME/.zprofile"
  elif [[ $SHELL == "/bin/bash" ]]; then
    RC_FILE="$HOME/.bash_profile"
  fi
  # make brew available now
  if [[ $ARCH == "x86_64" ]]; then
    echo 'eval "$(/usr/local/bin/brew shellenv)"' >> $RC_FILE
    eval "$(/usr/local/bin/brew shellenv)"
  else
    echo 'eval "$(/opt/homebrew/bin/brew shellenv)"' >> $RC_FILE
    eval "$(/opt/homebrew/bin/brew shellenv)"
  fi
fi

BREW_PREFIX=$(brew --prefix)

# install libusb
if [ ! -f $BREW_PREFIX/lib/libusb-1.0.0.dylib ]; then
  echo "Installing libusb"
  brew install libusb
  if [[ $ARCH == "arm64" ]]; then
    # https://github.com/pyusb/pyusb/issues/520
    # https://github.com/pyusb/pyusb/issues/355#issuecomment-974726078
    ln -s $BREW_PREFIX/lib/libusb-1.0.0.dylib /usr/local/lib/libusb.dylib
  fi
fi