custom-shell-scripts/update_from_git at main · jmortiger/custom-shell-scripts · GitHub

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#!/usr/bin/env bash

_show_help() {
	cat <<-EOF
		For stuff like rbenv.
	EOF
}
if [ "$1" = '--version' ]; then
	exit 1
fi

declare repoOwner repo installPath
declare forceCreateNew="false" # noPrompt="true"
declare -n opt1=installPath opt2=repoOwner opt3=repo
while [[ -n "${1+x}" ]]; do
	case "$1" in
		(-h | --help) _show_help; exit;;
		# (-v | --version) _show_version; exit;;
		(-p | --path)
			shift
			installPath="$1"
			shift
			;;
		(-o | --owner | --organization)
			shift
			repoOwner="$1"
			shift
			;;
		(-r | --repo)
			shift
			repo="$1"
			shift
			;;
		(-n | --new-folder | --create-new-folder)
			shift
			forceCreateNew="true"
			;;
		(*)
			if [[ -n "${opt1+x}" ]]; then
				if [[ -n "${opt2+x}" ]]; then
					if [[ -n "${opt3+x}" ]]; then
						exit 1
					else
						opt3="$1"
					fi
				else
					opt2="$1"
				fi
			else
				opt1="$1"
			fi
			shift
			;;
	esac
done
# Remove trailing `/` from path
if [[ "$installPath" =~ ^(.+)/$ ]]; then installPath="${BASH_REMATCH[1]}"; fi
declare -r tag="$(curl -s "https://api.github.com/repos/$repoOwner/$repo/releases/latest" | jq -r '.tag_name')" repo repoOwner
backupAndPullTag() {
	pushd "$1" || exit
	# Get the current tag's name for the backup
	declare -r currentRef="$(git describe --exact-match --tags)" # declare -r currentRef="$(git branch --show-current)"
	# Stash any changes https://git-scm.com/docs/git-stash
	git stash push --include-untracked --message "Backup of state before updating from \"$currentRef\" to \"$tag\""
	# Get it
	git switch "$tag" # git checkout "$tag"
	popd || exit
}
if [[ -d "$installPath/.git" ]]; then
	echo "Updating repo found in $installPath"
	# pushd "${installPath}"
	# # Get the current tag's name for the backup
	# declare -r currentRef="$(git describe --exact-match --tags)" # declare -r currentRef="$(git branch --show-current)"
	# # Stash any changes https://git-scm.com/docs/git-stash
	# git stash push --include-untracked --message "Backup of state before updating from \"$currentRef\" to \"$tag\""
	# # Get it
	# git switch "$tag" # git checkout "$tag"
	# popd
	backupAndPullTag "$installPath"
elif [[ -d "$installPath/$repo/.git" ]]; then
	echo "Updating repo found in $installPath/$repo"
	backupAndPullTag "$installPath/$repo"
else
	echo "No local repository; overwriting folder contents with $repoOwner/$repo $tag..."
	# If the folder doesn't exist...
	if ! [[ -d "$installPath" ]]; then
		echo "Creating folder at $installPath..."
		mkdir "$installPath/$repo"
	# If the folder does exist & we're creating a new one...
	elif eval "$forceCreateNew"; then
		echo "Path exists, but is not a git repository; creating new folder at $installPath/$repo"
		mkdir "$installPath/$repo"
	# # If the folder does exist & we're creating a new one...
	# elif eval "$forceCreateNew"; then
	# 	if  [[ "$installPath" =~ ^(.*)/$repo$ ]]; then
	# 		echo "Folder exists; overwriting contents..."
	# 	fi
	# 	declare -r installPath="$installPath/"
	# 	echo "Path exists, but is not a git repository; creating new folder at"
	else
		echo "???; creating new folder at $installPath/$repo"
		mkdir "$installPath/$repo"
	fi

	pushd "$installPath/$repo" || exit
	git clone --branch "$tag"
	popd || exit
fi