nodeinfo: add commit hash to version field to prevent scams

relay/nodeinfo.py

@@ -1,3 +1,4 @@
+import subprocess
 import urllib.parse
 
 import aiohttp.web
@@ -6,6 +7,12 @@ from . import app
 from .database import DATABASE
 
 
+try:
+    commit_label = subprocess.check_output(["git", "rev-parse", "HEAD"]).strip().decode('ascii')
+except:
+    commit_label = '???'
+
+
 nodeinfo_template = {
     # XXX - is this valid for a relay?
     'openRegistrations': True,
@@ -16,7 +23,7 @@ nodeinfo_template = {
     },
     'software': {
         'name': 'activityrelay',
-        'version': '0.1'
+        'version': '0.1 {}'.format(commit_label)
     },
     'usage': {
         'localPosts': 0,