fix version when using zipapp

src/exabgp/application/version.py

@@ -2,12 +2,12 @@
 
 """exabgp current version"""
 
+import os
 import sys
 import argparse
 import platform
 
-from exabgp.version import version
-
+from exabgp.version import version, get_root
 
 def setargs(sub):
     # fmt:off
@@ -25,6 +25,7 @@ def cmdline(cmdarg):
     sys.stdout.write('ExaBGP : %s\n' % version)
     sys.stdout.write('Python : %s\n' % sys.version.replace('\n', ' '))
     sys.stdout.write('Uname  : %s\n' % ' '.join(platform.uname()[:5]))
+    sys.stdout.write('From   : %s\n' % get_root())
     sys.stdout.flush()
 
 

src/exabgp/version.py

@@ -2,7 +2,21 @@
 import sys
 from datetime import datetime
 
-modification_time = modification_time = os.path.getmtime(os.path.abspath(__file__))
+def get_zipapp():
+    return os.path.abspath(os.path.sep.join(__file__.split(os.path.sep)[:-2]))
+
+def get_root():
+    if os.path.isfile(get_zipapp()):
+        return get_zipapp()
+    return os.path.abspath(os.path.sep.join(__file__.split(os.path.sep)[:-1]))
+
+try:
+    file = os.path.abspath(__file__)
+    modification_time = modification_time = os.path.getmtime(file)
+except NotADirectoryError:
+    zipapp = get_zipapp()
+    modification_time = modification_time = os.path.getmtime(zipapp)
+
 date = datetime.fromtimestamp(modification_time)
 
 commit = "unset"