#!/usr/bin/env bash

SCRIPTDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "${SCRIPTDIR}/.validate"

validate_vendor_diff() {
	IFS=$'\n'
	check_files=('vendor.sum' 'vendor.mod' 'vendor/')
	# shellcheck disable=SC2207
	changed_files=($(validate_diff --diff-filter=ACMR --name-only -- "${check_files[@]}" || true))
	unset IFS

	if [ -n "${TEST_FORCE_VALIDATE:-}" ] || [ "${#changed_files[@]}" -gt 0 ]; then
		# recreate vendor/
		./hack/vendor.sh
		# check if any files have changed
		diffs="$(git status --porcelain -- "${check_files[@]}" 2> /dev/null)"
		mfiles="$(echo "$diffs" | awk '/^ M / {print $2}')"
		if [ "$diffs" ]; then
			{
				echo 'The result of go mod vendor differs'
				echo
				echo "$diffs"
				echo
				echo 'Please vendor your package with hack/vendor.sh.'
				echo
				if [ -n "$mfiles" ]; then
					git diff -- "$mfiles"
				fi
			} >&2
			false
		else
			echo 'Congratulations! All vendoring changes are done the right way.'
		fi
	else
		echo 'No vendor changes in diff.'
	fi
}

# 1. make sure all the vendored packages are used
# 2. make sure all the packages contain license information (just warning, because it can cause false-positive)
validate_vendor_used() {
	for f in $(mawk '$1 = "#" { print $2 }' 'vendor/modules.txt'); do
		if [ -d "vendor/$f" ]; then
			if ! echo "vendor/$f"/* | grep -qiEc '/(LICENSE|COPYING)'; then
				echo "WARNING: could not find copyright information for $f"
			fi
		fi
	done
}

validate_vendor_diff
validate_vendor_used