Remove + character from platform releases string

pika/compat.py

@@ -1,9 +1,12 @@
 import os
 import sys as _sys
 import platform
+import re
 
 PY2 = _sys.version_info < (3,)
 PY3 = not PY2
+RE_NUM = re.compile(r'(\d+).+')
+
 
 if not PY2:
     # these were moved around for Python 3
@@ -129,9 +132,16 @@ def as_bytes(value):
     return value
 
 
+def to_digit(value):
+    if value.isdigit():
+        return int(value)
+    match = RE_NUM.match(value)
+    return int(match.groups()[0]) if match else 0
+
+
 def get_linux_version(release_str):
     ver_str = release_str.split('-')[0]
-    return tuple(map(int, ver_str.split('.')[:3]))
+    return tuple(map(to_digit, ver_str.split('.')[:3]))
 
 
 HAVE_SIGNAL = os.name == 'posix'

tests/unit/compat_tests.py

@@ -13,3 +13,15 @@ def test_get_linux_version_normal(self):
 
     def test_get_linux_version_short(self):
         self.assertEqual(compat.get_linux_version("4.11.0"), (4, 11, 0))
+
+    def test_get_linux_version_gcp(self):
+        self.assertEqual(compat.get_linux_version("4.4.64+"), (4, 4, 64))
+
+    def test_to_digit(self):
+        self.assertEqual(compat.to_digit("64"), 64)
+
+    def test_to_digit_with_plus_sign(self):
+        self.assertEqual(compat.to_digit("64+"), 64)
+
+    def test_to_digit_with_dot(self):
+        self.assertEqual(compat.to_digit("64."), 64)