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dotfiles/git/setup

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#!/bin/sh
config="${HOME}/.config"
uninstall=1
remove=1
copy=1
link=0
_usage() {
printf "\n" >&2
printf "Usage: setup [OPTIONS]\n" >&2
printf "\n" >&2
printf "Installs or Uninstalls git configuration files.\n" >&2
printf "\n" >&2
printf "Options:\n" >&2
printf "\t-c | --copy : Copy the configuration files, instead of creating symlinks.\n" >&2
printf "\t-h | --help : Print usage information.\n" >&2
printf "\t-l | --link : Create symlinks to the configuration files (Default).\n" >&2
printf "\t-r | --remove : Removes the entire ~/.config/git directory.\n" >&2
printf "\t-u | --uninstall : Uninstalls configuration files.\n" >&2
printf "\n" >&2
printf "If called without the uninstall option then it will install the configuration files.\n" >&2
printf "The copy and link options are ignored if called with the uninstall or remove option.\n" >&2
printf "\n" >&2
}
_parse_options() {
arg=
while ! test -z "$1"; do
arg="$1"
case $arg in
-c | --copy)
copy=0
link=1
shift;;
-h | --help)
_usage
exit;;
-l | --link)
copy=1
link=0
shift;;
-r | --remove)
remove=0
shift;;
-u | --uninstall)
uninstall=0
shift;;
*)
echo "Unknown option $arg" >&2
shift;;
esac
done
}
_make_dirs() {
if ! test -d "${config}"; then
mkdir "${config}"
fi
}
_remove_git() {
echo "Removing git directory..."
test -d "${config}/git" && rm -r "${config}/git"
}
_link_git() {
echo "Linking git configuration..."
ln -sfv "${PWD}/git" "${config}"
}
_copy_git() {
echo "Copying git configuration..."
cp -r "${PWD}/git" "${config}"
}
_install() {
_make_dirs
test "$copy" -eq 0 && _copy_git && return "$?"
test "$link" -eq 0 && _link_git && return "$?"
echo "Neither link or copy was passed, see --help for usage"
exit 1
}
#------------------------------- main -------------------------------
main() {
_parse_options "$@"
test "$remove" -eq 0 && _remove_git && exit "$?"
test "$uninstall" -eq 0 && _remove_git && exit "$?"
_install && exit "$?"
}
main "$@"