move test helpers

scripts/check-doc.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+# author: deadc0de6 (https://github.com/deadc0de6)
+# Copyright (c) 2022, deadc0de6
+
+set -e
+
+## test doc external links
+find . -type f -iname '*.md' | while read -r line; do
+  ./scripts/check_links.py "${line}"
+done
+
+## test the doc internal links
+## https://github.com/remarkjs/remark-validate-links
+## https://github.com/tcort/markdown-link-check
+## npm install -g remark-cli remark-validate-links
+set +e
+which remark >/dev/null 2>&1
+r="$?"
+set -e
+if [ "$r" != "0" ]; then
+  echo "[WARNING] install \"remark\" to test the doc"
+  exit 1
+fi
+
+find . -type f -iname '*.md' | while read -r line; do
+  remark -f -u validate-links "${line}"
+done
+
+echo "documentation OK"