Warn about open todos on major release

During this early development I love hacking down
half finished unpolished code with open todos
and then mark them with a TODO comment

Then at some later point I might forget how everything
is held together by duck tape and do a 1.0.0 release

This check in the release script should avoid this mistake
and ensure that the 1.x.x and all other major releases
are what they claim to be: a finished, polished and working version

scripts/release.sh

@@ -11,6 +11,29 @@ then
 	exit 1
 fi
 
+function warn_todos() {
+	local todos=0
+	todos="$(grep -nri TODO twnet_parser | wc -l)"
+	if [ "$todos" == "0" ]
+	then
+		return
+	fi
+	echo "<============ TODOS"
+	echo "..."
+	grep --color=always -nri TODO twnet_parser | tail -n2
+	echo "<============ TODOS"
+	echo "Warning: there are $todos open todos!"
+	echo "         doing a major release with open todos"
+	echo "         is not recommended!"
+	echo "Do you really want to continue? [y/N]"
+	read -r -n1 yn
+	if ! [[ "$yn" =~ [yY] ]]
+	then
+		echo "aborting ..."
+		exit 0
+	fi
+}
+
 if ! git diff-index --quiet --cached HEAD --
 then
 	echo "Error: dirty git working tree"
@@ -119,6 +142,10 @@ then
 			echo "       $latest_tag -> $tag_name"
 			exit 1
 		fi
+		if [ "$diff" == "1" ]
+		then
+			warn_todos
+		fi
 	else
 		echo "Error: failed to parse latest tag"
 		exit 1