hack/validate/pkg-imports

#!/usr/bin/env bash
set -e

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

IFS=$'\n'
files=($(validate_diff --diff-filter=ACMR --name-only -- 'pkg/*.go' || true))
unset IFS

badFiles=()
for f in "${files[@]}"; do
	IFS=$'\n'
	badImports=($(go list -e -f '{{ join .Deps "\n" }}' "$f" | sort -u \
		| grep -vE '^github.com/moby/moby/v2/pkg/' \
		| grep -vE '^github.com/moby/moby/v2/vendor' \
		| grep -vE '^github.com/moby/moby/v2/internal' \
		| grep -E '^github.com/moby/moby' \
		|| true))
	unset IFS

	for import in "${badImports[@]}"; do
		badFiles+=("$f imports $import")
	done
done

if [ ${#badFiles[@]} -eq 0 ]; then
	echo 'Congratulations!  Packages in "./pkg/..." are safely isolated from internal code.'
else
	{
		echo 'These files import internal code: (either directly or indirectly)'
		for f in "${badFiles[@]}"; do
			echo " - $f"
		done
		echo
	} >&2
	false
fi