Fake-pacman is a terminal program for macOS and Linux that will make it look like you are installing a pacman package.
Just run the executable, type any package name and watch it "install" the package.
First you have to install ncurses, just run sudo pacman -S ncurses on Arch, or sudo apt install libncurses-dev on Debian.
Then to compile it, run make linux.
Install gcc by running brew install gcc, and install ncurses by running brew install ncurses. If you want to compile a universal executable that will run on all macs, you also need Xcode Command Line Tools, install it by running xcode-select --install.
Then to compile type make macX86 or make macARM depending on what procceser you have. To make the universal executable run make macUNI.
Fake-pacman is free and open source, it's distributed under the GNU General Public License.