updater.py and bug fixes

toxygen/updater.py

@@ -0,0 +1,25 @@
+import util
+import requests
+
+
+def check_for_updates():
+    current_version = util.program_version
+    major, minor, patch = list(map(lambda x: int(x), current_version.split('.')))
+    versions = generate_versions(major, minor, patch)
+    for version in versions:
+        if send_request(version):
+            return version
+    return None
+
+
+def send_request(version):
+    # TODO: proxy support
+    request = requests.get('https://github.com/toxygen-project/toxygen/releases/tag/v' + version)
+    return request.status_code == 200
+
+
+def generate_versions(major, minor, patch):
+    new_major = '.'.join([str(major + 1), '0', '0'])
+    new_minor = '.'.join([str(major), str(minor + 1), '0'])
+    new_patch = '.'.join([str(major), str(minor), str(patch + 1)])
+    return new_major, new_minor, new_patch