Print version on startup

The version is determined from either the contents of _version.py
(expected to be present in release tarballs) or the output of
`git describe --always`.

.gitignore

@@ -1,5 +1,6 @@
 *.pyc
 *.db
 
+/ankisyncd/_version.py
 /collections
 /venv

ankisyncd/__init__.py

@@ -3,3 +3,31 @@ import sys
 
 sys.path.insert(0, "/usr/share/anki")
 sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(__file__)), "anki-bundled"))
+
+_homepage = "https://github.com/tsudoko/anki-sync-server"
+_unknown_version = "[unknown version]"
+
+
+def _get_version():
+    try:
+        from ankisyncd._version import version
+
+        return version
+    except ImportError:
+        pass
+
+    import subprocess
+
+    try:
+        return (
+            subprocess.run(
+                ["git", "describe", "--always"],
+                stdout=subprocess.PIPE,
+                stderr=subprocess.PIPE,
+            )
+            .stdout.strip()
+            .decode()
+            or _unknown_version
+        )
+    except (FileNotFoundError, subprocess.CalledProcessError):
+        return _unknown_version

ankisyncd/sync_app.py

@@ -642,6 +642,8 @@ def make_app(global_conf, **local_conf):
 
 def main():
     logging.basicConfig(level=logging.INFO, format="[%(asctime)s]:%(levelname)s:%(name)s:%(message)s")
+    import ankisyncd
+    logger.info("ankisyncd {} ({})".format(ankisyncd._get_version(), ankisyncd._homepage))
     from wsgiref.simple_server import make_server, WSGIRequestHandler
     from ankisyncd.thread import shutdown
     import ankisyncd.config