GitHub Actions: Check URLs using lychee

This makes it possible to be aware of dead links and replace
them with other resources (such as archived versions) as
soon as possible.

Author: Calinou

.github/workflows/check_urls.yml

@@ -0,0 +1,36 @@
+name: 🌐 Check URLs
+on:
+  push:
+  pull_request:
+  schedule:
+    # Every day at 18:00 UTC.
+    # URLs can decay over time. Setting up a schedule makes it possible to be warned
+    # about dead links as soon as possible.
+    - cron: "0 18 * * *"
+
+jobs:
+  check-urls:
+    runs-on: ubuntu-24.04
+    steps:
+
+      - uses: actions/checkout@v4
+
+      - name: Restore lychee cache
+        uses: actions/cache@v4
+        with:
+          path: .lycheecache
+          key: cache-lychee-${{ github.sha }}
+          restore-keys: cache-lychee-
+
+      - name: Run lychee
+        uses: lycheeverse/lychee-action@v2
+        with:
+          args: >
+            --base .
+            --no-progress
+            --cache
+            --max-cache-age 1d
+            "**/*.md" "**/*.gd" "**/*.cs" "**/*.tscn" "**/*.tres" "**/*.html"
+
+      - name: Fail if there were link errors
+        run: exit ${{ steps.lc.outputs.exit_code }}

.lycheeignore

@@ -0,0 +1,30 @@
+# Don't read Godot's own URL schemes as web URLs.
+user:\/\/.*
+res:\/\/.*
+uid:\/\/.*
+
+# Don't read WebSockets or TCP URLs as web URLs.
+ws(s?):\/\/.*
+tcp:\/\/.*
+
+# Security checks prevent checking the URLs of these websites automatically,
+# typically returning 403 errors.
+.*asecuritysite\.com.*
+.*intel\.com.*
+.*reddit\.com.*
+
+# Don't check URLs from these websites due to frequent rate limits (error 429) or timeouts.
+.*adobe\.com.*
+.*gamedevartisan\.com.*
+.*github\.com.*
+.*gnu\.org.*
+.*loopit\.dk.*
+.*meta\.com.*
+.*sourceforge\.io.*
+
+# Not a valid URL with the GET method, which lychee always sends.
+# Mentioned in the class reference.
+.*httpbin\.org\/post
+
+# Class reference mentions `example.com/index.php` in an example, which is 404.
+.*example\.com.*

3d/ik/README.md

@@ -11,7 +11,7 @@ Renderer: Forward+
 ## How does it work?
 
 This demo shows how to implement IK using two different methods. One uses the
-[`SkeletonIK`](https://docs.godotengine.org/en/latest/classes/class_skeletonik.html)
+[`SkeletonIK3D`](https://docs.godotengine.org/en/latest/classes/class_skeletonik3d.html)
 node which is built into Godot. The other method is using a script
 called FABRIK (inside of the SADE plugin) for inverse kinematics.
 

3d/platformer/coin/coin.gd.uid

@@ -0,0 +1 @@
+uid://b2kqvu7a5kiev

3d/platformer/enemy/enemy.gd.uid

@@ -0,0 +1 @@
+uid://dwssf05sbkfak

3d/platformer/player/bullet/bullet.gd.uid

@@ -0,0 +1 @@
+uid://c4p5enna2foh1

3d/platformer/player/follow_camera.gd.uid

@@ -0,0 +1 @@
+uid://bd03i5s1ufxt4

3d/platformer/player/player.gd.uid

@@ -0,0 +1 @@
+uid://dl2fniviqap3d

3d/truck_town.zip

@@ -29,11 +29,11 @@ Check out this demo on the asset library: https://godotengine.org/asset-library/
 The base vehicle uses a
 [`VehicleBody3D`](https://docs.godotengine.org/en/latest/classes/class_vehiclebody3d.html)
 node. The trailer truck is tied together using a
-[`ConeJointTwist`](https://docs.godotengine.org/en/latest/classes/class_conetwistjoint.html)
+[`ConeJointTwist3D`](https://docs.godotengine.org/en/latest/classes/class_conetwistjoint3d.html)
 node, and the tow truck is tried together using a chain made of
 [`RigidBody3D`](https://docs.godotengine.org/en/latest/classes/class_rigidbody3d.html)
 nodes which are pinned together using
-[`PinJoint`](https://docs.godotengine.org/en/latest/classes/class_pinjoint.html) nodes.
+[`PinJoint3D`](https://docs.godotengine.org/en/latest/classes/class_pinjoint3d.html) nodes.
 
 ## Screenshots