one fast link checker to rule them all (#23041)

* one fast link checker to rule them all

* -L alias

* refactor

* hacking away

* passing pages

* adding a workflow

* limit level to critical

* ability to pass a specific set of files

* testing specific files

* remove temporary debugging

* reorganize the printing

* formatting of output

* check images too

* prettyFullPath()

* minimal permission on workflow

* update comment

* new permission

* fix actions shas

.github/workflows/link-check-all.yml

@@ -0,0 +1,64 @@
+name: 'Link Checker: All English'
+
+# **What it does**: Renders the content of every page and check all internal links.
+# **Why we have it**: To make sure all links connect correctly.
+# **Who does it impact**: Docs content.
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+  pull_request:
+
+permissions:
+  contents: read
+  # Needed for the 'trilom/file-changes-action' action
+  pull-requests: read
+
+jobs:
+  build:
+    runs-on: ${{ fromJSON('["ubuntu-latest", "self-hosted"]')[github.repository == 'github/docs-internal'] }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
+
+      - name: Setup node
+        uses: actions/setup-node@04c56d2f954f1e4c69436aa54cfef261a018f458
+        with:
+          node-version: 16.13.x
+          cache: npm
+
+      - name: Install
+        run: npm ci
+
+      - name: Gather files changed
+        uses: trilom/file-changes-action@a6ca26c14274c33b15e6499323aac178af06ad4b
+        id: get_diff_files
+        with:
+          # So that `steps.get_diff_files.outputs.files` becomes
+          # a string like `foo.js path/bar.md`
+          output: ' '
+      - name: Insight into changed files
+        run: |
+          echo ${{ steps.get_diff_files.outputs.files }}
+
+      - name: Link check (warnings, changed files)
+        run: |
+          ./script/rendered-content-link-checker.mjs \
+            --language en \
+            --max 100 \
+            --check-anchors \
+            --check-images \
+            --verbose \
+            ${{ steps.get_diff_files.outputs.files }}
+
+      - name: Link check (critical, all files)
+        run: |
+
+          ./script/rendered-content-link-checker.mjs \
+            --language en \
+            --exit \
+            --verbose \
+            --check-images \
+            --level critical