pyver="${1:-python2}"
-/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+if ! command -v brew; then
+ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+fi
brew update
brew install par2 readline rsync pkg-config md5sha1sum