Implement the ability to parse setup.py requirements

pyup/requirements.py

@@ -107,7 +107,8 @@ def __init__(self, path, content, sha=None):
         self._is_valid = None
 
     def __str__(self):
-        return "RequirementFile(path='{path}', sha='{sha}', content='{content}')".format(
+        return "{klass}(path='{path}', sha='{sha}', content='{content}')".format(
+            klass=self.__class__.__name__,
             path=self.path,
             content=self.content[:30] + "[truncated]" if len(self.content) > 30 else self.content,
             sha=self.sha
@@ -229,6 +230,34 @@ def get_requirement_class(self):   # pragma: no cover
         return Requirement
 
 
+class SetupPyFile(RequirementFile):
+    def _parse(self):
+        self._requirements, self._other_files = [], []
+
+        Klass = self.get_requirement_class()
+
+        def setup(*args, **kwargs):
+            reqs = kwargs.get('install_requires', []) + kwargs.get('tests_require', [])
+
+            for num, line in enumerate(reqs):
+                req = Klass.parse(line, num)
+
+                if req.package:
+                    self._requirements.append(req)
+
+        try:
+            module = __import__('setuptools')
+        except ImportError:
+            module = __import__('distutils.core')
+
+        old_setup = module.setup
+        module.setup = setup
+
+        exec(self.content, globals())
+
+        module.setup = old_setup
+
+
 class Requirement(object):
     def __init__(self, name, specs, hashCmp, line, lineno, extras):
         self.name = name

tests/test_requirements.py

@@ -3,7 +3,7 @@
 from unittest import TestCase
 from pyup.requirements import Requirement
 from mock import patch, PropertyMock, Mock
-from pyup.requirements import RequirementFile, RequirementsBundle
+from pyup.requirements import RequirementFile, RequirementsBundle, SetupPyFile
 from .test_package import package_factory
 from .test_pullrequest import pullrequest_factory
 import requests_mock
@@ -891,3 +891,43 @@ def test_requirements(self):
                 [r for r in reqs.requirements]
             )
 
+
+class SetupPyFileTestCase(TestCase):
+    def setUp(self):
+        with open(os.path.join(os.path.dirname(__file__), '..', 'setup.py')) as f:
+            self.content = f.read()
+
+    def test_parse(self):
+        assertion = AssertionError('setup function should not have been called')
+        requirements = [
+            "requests",
+            "pygithub",
+            "click",
+            "tqdm",
+            "pyyaml",
+            "hashin",
+        ] + [
+            "requests-mock",
+            "mock",
+            "flake8"
+        ]
+
+        req = SetupPyFile('setup.py', self.content)
+
+        def req_requirements():
+            return sorted(r.name for r in req.requirements)
+
+        try:
+            with patch('setuptools.setup', side_effect=assertion):
+                self.assertListEqual(req_requirements(), sorted(requirements))
+        except ImportError:
+            pass
+        else:
+            return
+
+        with patch('distutils.core.setup', side_effect=assertion):
+            self.assertListEqual(req_requirements(), sorted(requirements))
+
+    def test_str(self):
+        req = SetupPyFile('setup.py', self.content)
+        self.assertEqual(str(req), "SetupPyFile(path='setup.py', sha='None', content='#!/usr/bin/env python\n# -*- co[truncated]')")