Add linter script for checking copyrights

Author: cderici

scripts/copyright.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+supports_colors() {
+	if [[ -z ${TERM} ]] || [[ ${TERM} == "" ]] || [[ ${TERM} == "dumb" ]]; then
+		echo "NO"
+		return
+	fi
+	if which tput >/dev/null 2>&1; then
+		# shellcheck disable=SC2046
+		if [[ $(tput colors) -gt 1 ]]; then
+			echo "YES"
+			return
+		fi
+	fi
+	echo "NO"
+}
+
+red() {
+	if [[ "$(supports_colors)" == "YES" ]]; then
+		tput sgr0
+		echo "$(tput setaf 1)${1}$(tput sgr0)"
+		return
+	fi
+	echo "${1}"
+}
+
+run_copyright() {
+	OUT=$(find . -name '*.py' | grep -v -E "./(docs|scripts|debian|juju-egg-info|.tox|.git|juju/client)|__init__" | sort | xargs grep -L -E '# (Copyright|Code generated)' || true)
+	LINES=$(echo "${OUT}" | wc -w)
+	if [ "$LINES" != 0 ]; then
+		echo ""
+		echo "$(red 'Found some issues:')"
+		echo -e '\nThe following files are missing copyright headers'
+		echo "${OUT}"
+		exit 1
+	fi
+}
+
+test_copyright() {
+	echo "==> Copyright analysis"
+
+	(
+		# cd .. || exit
+
+		# Check for copyright notices
+		run_copyright
+	)
+}
+
+test_copyright