Fix python-semver#37 allow single zero without leading zeros in prerelease version

werwolfby · werwolfby · commit 5e41beb0aedf · 2016-11-09T00:38:17.000+03:00
diff --git a/semver.py b/semver.py
@@ -19,8 +19,8 @@
         \.
         (?P<patch>(?:0|[1-9][0-9]*))
         (\-(?P<prerelease>
-            [1-9A-Za-z-][0-9A-Za-z-]*
-            (\.[1-9A-Za-z-][0-9A-Za-z-]*)*
+            (?:0|[1-9A-Za-z-][0-9A-Za-z-]*)
+            (\.(?:0|[1-9A-Za-z-][0-9A-Za-z-]*))*
         ))?
         (\+(?P<build>
             [0-9A-Za-z-]+
diff --git a/tests.py b/tests.py
@@ -33,6 +33,28 @@ def test_should_parse_version():
     }
 
 
+def test_should_parse_zero_prerelease():
+    result = parse("1.2.3-rc.0+build.0")
+
+    assert result == {
+        'major': 1,
+        'minor': 2,
+        'patch': 3,
+        'prerelease': 'rc.0',
+        'build': 'build.0',
+    }
+
+    result = parse("1.2.3-rc.0.0+build.0")
+
+    assert result == {
+        'major': 1,
+        'minor': 2,
+        'patch': 3,
+        'prerelease': 'rc.0.0',
+        'build': 'build.0',
+    }
+
+
 def test_should_get_less():
     assert compare("1.0.0", "2.0.0") == -1
 
