update appveyor and travis configs

scripts/dump_version.py

@@ -0,0 +1,23 @@
+"""
+This script is solely used when generating builds. It generates a version number automatically using
+git tags as it's basis. Whenever a build is created, run this file beforehand and it should replace
+the old version number with the new one in VERSION.YML
+"""
+
+import yaml
+import subprocess
+import os
+
+
+with open("version.yml", 'r+') as file:
+    data = yaml.load(file)
+    file.seek(0)
+    file.truncate()
+    # todo: run Version() on the tag to ensure that it's of proper formatting - fail a test if not and prevent building
+    # python's versioning spec doesn't handle the same format git describe outputs, so convert it.
+    label = os.environ["PYFA_VERSION"].split('-') if "PYFA_VERSION" in os.environ else subprocess.check_output(["git", "describe", "--tags"]).strip().decode().split('-')
+    label = '-'.join(label[:-2])+'+'+'-'.join(label[-2:]) if len(label) > 1 else label[0]
+    print(label)
+    data['version'] = label
+    yaml.dump(data, file, default_flow_style=False)
+