Add broken link checker GitHub workflow

.github/workflows/md-broken-link-check.yml

@@ -0,0 +1,42 @@
+# Credit to https://github.com/OWASP/CheatSheetSeries
+name: Markdown Broken Link Check
+
+on:
+  push:
+  pull_request:
+    branches:
+    - main
+
+jobs:
+  link-check:
+    runs-on: ubuntu-22.04
+    env:
+      CI: true
+    steps:
+    - name: Setup Action
+      uses: actions/checkout@v3
+    - name: Setup Node
+      uses: actions/setup-node@v3
+      with:
+        node-version: 12.x
+    - name: Install dependencies
+      run: npm install
+    - name: Run link check
+      run: npm run link-check
+    - name: Show broken links
+      if: failure()
+      run: |
+        cat log | awk -v RS="FILE:" 'match($0, /(\S*\.md).*\[✖\].*(\d*\slinks\schecked\.)(.*)/, arr ) { print "FILE:"arr[1] arr[3] > "brokenlinks"}'
+        rm -f err log
+        cat brokenlinks
+        links=`cat brokenlinks`
+        links="${links//'%'/'%25'}"
+        links="${links//$'\n'/'%0A'}"
+        links="${links//$'\r'/'%0D'}"
+        echo ::set-output name=links::**Following links are broken:** %0A$links
+    - name: Send comment to PR with broken links
+      if: failure() && github.event_name == 'pull_request'
+      uses: thollander/actions-comment-pull-request@main
+      with:
+        message: ${{ steps.brokenlinks.outputs.links }}
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -4,3 +4,5 @@
 _site/
 node_modules/
 package-lock.json
+/log
+/err

markdown-link-check-config.json

@@ -0,0 +1,33 @@
+{
+  "ignorePatterns": [
+    {
+      "pattern": "^bundle.zip"
+    },
+    {
+      "pattern": "^News.xml"
+    },
+    {
+      "pattern": "^/"
+    },
+    {
+      "pattern": "vincent.bernat.im"
+    },
+    {
+      "pattern": "developer.android.com"
+    },
+    {
+      "pattern": "csrc.nist.gov"
+    },
+    {
+      "pattern": "www.exploit-db.com"
+    }
+  ],
+  "httpHeaders": [
+    {
+      "urls": ["https://", "http://"],
+      "headers": {
+        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:64.0) Gecko/20100101 Firefox/64.0"
+      }
+    }
+  ]
+}

package.json

@@ -8,12 +8,14 @@
         "textlint": "^12.5.1",
         "textlint-filter-rule-comments": "^1.2.2",
         "textlint-filter-rule-allowlist": "^4.0.0",
-        "textlint-rule-terminology": "^3.0.4"
+        "textlint-rule-terminology": "^3.0.4",
+        "markdown-link-check": "^3.10.3"
     },
     "scripts": {
         "test": "npm run lint-markdown && npm run lint-terminology",
         "lint-terminology": "textlint ./2022",
-        "lint-markdown": "markdownlint ./2022"
+        "lint-markdown": "markdownlint ./2022",
+        "link-check": "find 2022 -name \\*.md -exec markdown-link-check -c markdown-link-check-config.json 1> log 2> err {} \\; && if [ -e err ] && grep -q  \"ERROR:\" err ; then exit 113  ; else echo -e \"All good\"; fi"
     },
     "repository": {
         "type": "git",