Add Proper .pkg link fallbacks

resources/constants.py

@@ -24,6 +24,7 @@ class Constants:
         self.repo_link_latest = f"{self.repo_link}/releases/tag/{self.patcher_version}"
         self.copyright_date = "Copyright © 2020-2022 Dortania"
         self.installer_pkg_url = f"{self.repo_link_latest}/OCLP-Install.pkg"
+        self.installer_pkg_url_nightly = "https://nightly.link/dortania/OpenCore-Legacy-Patcher/workflows/build-app-wxpython-offline/main/OCLP-Install.pkg"
 
         # OpenCore Versioning
         # https://github.com/acidanthera/OpenCorePkg

resources/utilities.py

@@ -410,6 +410,16 @@ def monitor_disk_output(disk):
     output = output[-2]
     return output
 
+def validate_link(link):
+    # Check if link is 404
+    try:
+        response = requests.head(link, timeout=5)
+        if response.status_code == 404:
+            return False
+        else:
+            return True
+    except (requests.exceptions.Timeout, requests.exceptions.TooManyRedirects, requests.exceptions.ConnectionError, requests.exceptions.HTTPError):
+        return False
 
 def block_os_updaters():
     # Disables any processes that would be likely to mess with