Hindent

#!/bin/bash
# https://github.com/racaljk/hosts

date_amend()
{
	# check if hosts file changes
	if git diff --exit-code "$1" > /dev/null; then
		# hosts file is not changed,
		# the date string will be set to the git log records.
		local repo_date=$(git log --date=short -n1 "$1" | \
				grep -Pom1 "\d+-\d+-\d+")
		sed -i "s/[0-9]\+-[0-9]\+-[0-9]\+/$repo_date/" "$1"
	else
		# hosts file has been changed,
		# set date string to the system date.
		sed -i "s/[0-9]\+-[0-9]\+-[0-9]\+/$(date +%F)/" "$1"
	fi
}

eol_amend()
{
	dos2unix -q "$1"
}

style_amend()
{
	local orig="\([0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+\)[[:blank:]]\+"
	local modified="\1$(echo -e "\t")"

	sed -i "s/$orig/$modified/g" "$1"
}

if [ -z "$1" ]; then
	echo "Usage: $0 [your-hosts-file]"
	exit 1
fi


eol_amend "$1"
date_amend "$1"
style_amend "$1"