How to install git-subtree on Amazon linux

amazonlinux_install_git_subtree.md

TL;DR run the following:

sudo dnf update
sudo dnf update git
sudo dnf install git-subtree

Background:

The default git package on amazonlinux does not contain the script for git-subtree, and so the following fails:

[home] git subtree add --prefix .vim/bundle/tpope-vim-surround https://bitbucket.org/vim-plugins-mirror/vim-surround.git main
git: 'subtree' is not a git command. See 'git --help'.

The commonly found solution online is to run:

sudo yum update git # For Amazon Linux 2
sudo dnf update git # For Amazon Linux 2023

sudo chmod +x /usr/share/doc/git/contrib/subtree/git-subtree.sh
sudo ln -s /usr/share/doc/git/contrib/subtree/git-subtree.sh /usr/lib/git-core/git-subtree

However, that obviously doesn't work if the module itself isn't installed.