CI : Added link_check

.github/workflows/link_check.yml

@@ -0,0 +1,17 @@
+on:
+  pull_request: # temporary for testing
+  schedule:
+    - cron: "0 9 * * *"
+
+# this cancels workflows in progress if you start a new one
+concurrency:
+    group: ${{ github.workflow }}-${{ github.ref }}
+    cancel-in-progress: true
+
+jobs:
+    check-basic-cli-docs-broken-links:
+        runs-on: [ubuntu-20.04]
+        steps:
+          - uses: actions/checkout@v3
+
+          - run: ./ci/link_check.sh

ci/link_check.sh

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+#!/usr/bin/env bash
+
+# https://vaneyckt.io/posts/safer_bash_scripts_with_set_euxo_pipefail/
+set -euxo pipefail
+
+base_url="https://www.roc-lang.org/packages/basic-cli"
+
+timeout=15 #timeout in seconds 
+
+broken_links=()
+
+extract_links() {
+  curl -s "$1" | grep -Eo 'href="([^"#]+)"' | cut -d'"' -f2
+}
+
+links=$(extract_links "$base_url")
+
+for link in "${links[@]}"; do
+  full_link="${base_url}${link}"
+  status=$(curl -o /dev/null -s -w "%{http_code}" --connect-timeout $timeout "$full_link")
+  if [[ $status != 200 ]]; then
+    broken_links+=("$full_link")
+  fi
+done
+
+if [[ ${#broken_links[@]} -gt 0 ]]; then
+  echo "Broken links found:"
+  printf '%s\n' "${broken_links[@]}"
+  exit 1
+fi