git-create-bare-repo

#!/usr/bin/env bash

NO_FORMAT="\033[0m"
F_INVERT="\033[7m"
F_BOLD="\033[1m"
F_DIM="\033[2m"
C_GREEN="\033[38;5;2m"
C_GRAY="\033[38;5;8m"
C_RED="\033[38;5;9m"

function log() {
	printf "${F_DIM}[%s]${NO_FORMAT} $1${NO_FORMAT}\n" "$(date +'%Y-%m-%d %H:%M:%S.%3N')" ${@:2}
}

function info() {
	log "${C_GREEN}INFO${NO_FORMAT} $*"
}

function error() {
	log "${C_RED}ERROR${NO_FORMAT} $*"
}

function usage() {
	echo -e "$(
		cat <<EOF
Create a new bare repository with folders as branch names

Usage:
    ${C_GREEN}$(basename "$0")${NO_FORMAT} ${F_DIM}${C_GRAY}[flags]${NO_FORMAT} ${F_DIM}${F_BOLD}<repo_name>${NO_FORMAT}
	
Flags:
    --help, -h ${F_DIM}
        Show this help text
		${NO_FORMAT}
EOF
	)"
}

function main() {
	repo_folder="$1"

	for var in "$@"; do
		case "$var" in
		--help | -h)
			usage
			exit 0
			;;
		esac
	done

	if [ -z "$repo_folder" ]; then
		error "Repo name is missing"
		echo
		usage
		exit 1
	fi

	if [ -d "$repo_folder" ] || [ -f "$repo_folder" ]; then
		error "File or folder \"$repo_folder\" already exists. Cannot create new repo."
		exit 1
	fi

	repo_path="$(realpath "$PWD/$repo_folder")"

	info "Creating bare repo at \"$repo_path\""

	mkdir "$repo_path"
	cd "$repo_path"

	out="$(git init --bare '.bare' 2>&1)"

	if [ "$?" -ne 0 ]; then
		error "Failed to create repo:" "$out"
		exit 1
	fi

	echo 'gitdir: ./.bare' >.git

	main_branch_name="$(git config --global init.defaultBranch 2>&1)"
	if [ -z "$main_branch_name" ]; then
		main_branch_name='main'
	fi

	out="$(git worktree add --orphan -b "$main_branch_name" "$main_branch_name" 2>&1)"
	if [ "$?" -ne 0 ]; then
		error "Failed to create repo:" "$out"
		exit 1
	fi

	info "Done!"
}

main "$@"