Add CheckUpdates.py script

CheckUpdates.py

@@ -0,0 +1,34 @@
+import json, sys
+from urllib.parse import urlparse
+import requests
+from github import Github
+
+j = json.load(open('dependencies.json'))
+github = Github()
+
+for (name, dep_info) in j.items():
+    # sys.stderr.write('Checking dependency definitions for ' + name + '\n')
+    if "git" in dep_info:
+        git_info = dep_info["git"]
+        git_repo = git_info["repository"]
+        git_tag = git_info["tag"]
+
+        git_url_parsed = urlparse(git_repo)
+        if git_url_parsed.hostname == 'github.com':
+            parts = git_url_parsed.path.split("/")
+            user = parts[1]
+            repo = parts[2]
+            repo = repo[:-4] if repo.endswith('.git') else repo
+
+            gh_repo = github.get_repo(user + '/' + repo)
+            tags = gh_repo.get_tags()
+
+            latest_tag = tags[0] if tags.totalCount > 0 else None
+            if latest_tag is not None:
+                if latest_tag.name != git_tag:
+                    print('Upgrade {name} from {old_version} to {new_version}'.format(name=name, old_version=git_tag, new_version=latest_tag.name))
+
+        else:
+            print('git is only supported for github repositories at the moment.', file=sys.stderr)
+            exit(-1)
+