run_before_00-require-git.sh: the documented first command died on the most
ordinary kind of fresh machine there is. chezmoi is a static download and
installs fine, but all six git-repo externals need git, and Ubuntu cloud
images, the Ubuntu docker image and WSL Ubuntu all ship curl and no git.
Installs it across apt/dnf/yum/pacman/zypper/apk/brew, and explains itself
where it cannot (no sudo, or macOS where `git` is a GUI-installer stub).
run_after_99-next-step.sh: `dotup` is command-not-found in the very session
that installed it, because Ubuntu's ~/.profile adds ~/.local/bin to PATH only
if the directory existed at login. No child process can fix its parent's PATH,
so print the absolute path instead of letting the user guess. Silent once PATH
is sorted out.
bcherb2
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