From 6c66f96cacf542f1ff0f73a81375876429f60633 Mon Sep 17 00:00:00 2001
From: Dan Ryan <dan@danryan.co>
Date: Fri, 8 Dec 2017 18:54:08 -0500
Subject: [PATCH 1/3] Add failing windows test

---
 tests/test_pipenv.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tests/test_pipenv.py b/tests/test_pipenv.py
index bd716c71..b05c7bf4 100644
--- a/tests/test_pipenv.py
+++ b/tests/test_pipenv.py
@@ -424,6 +424,22 @@ setup(
             assert 'urllib3' in p.lockfile['default']
             assert 'certifi' in p.lockfile['default']
 
+    @pytest.mark.install
+    @pytest.mark.pin
+    def test_windows_pinned_pipfile(self):
+        with PipenvInstance() as p:
+            with open(p.pipfile_path, 'w') as f:
+                contents = """
+[packages]
+tablib = "<0.12"
+                """.strip()
+                f.write(contents)
+            c = p.pipenv(install)
+            assert c.return_code == 0
+            assert 'tablib' in p.pipfile['packages']
+            assert 'tablib' in p.lockfile['default']
+
+
     @pytest.mark.run
     @pytest.mark.install
     def test_multiprocess_bug_and_install(self):

From ef144482ba24d806eb4661cc5807153e2dc872dc Mon Sep 17 00:00:00 2001
From: Dan Ryan <dan@danryan.co>
Date: Fri, 8 Dec 2017 20:14:52 -0500
Subject: [PATCH 2/3] Add a check to see if entries are valid specifiers

- Should fix windows parsing of pipfiles
- I had this fix implemented somewhere before but I think I 'cleaned' it
out for some reason
---
 pipenv/utils.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/pipenv/utils.py b/pipenv/utils.py
index 50ba449e..f433287b 100644
--- a/pipenv/utils.py
+++ b/pipenv/utils.py
@@ -869,6 +869,16 @@ def is_installable_file(path):
         path = urlparse(path['file']).path if 'file' in path else path['path']
     if not isinstance(path, six.string_types) or path == '*':
         return False
+    # If the string starts with a valid specifier operator, test if it is a valid
+    # specifier set before making a path object (to avoid breakng windows)
+    if any(path.startswith(spec) for spec in '!=<>'):
+        try:
+            pip.utils.packaging.specifiers.SpecifierSet(path)
+        # If this is not a valid specifier, just move on and try it as a path
+        except pip.utils.packaging.specifiers.InvalidSpecifier:
+            pass
+        else:
+            return False
     lookup_path = Path(path)
     return lookup_path.is_file() or (lookup_path.is_dir() and
             pip.utils.is_installable_dir(lookup_path.resolve().as_posix()))

From aac675235e2c8623bbb76f22cfa8c53d1b218786 Mon Sep 17 00:00:00 2001
From: Dan Ryan <dan@danryan.co>
Date: Fri, 8 Dec 2017 20:30:24 -0500
Subject: [PATCH 3/3] Fix test typo

---
 tests/test_pipenv.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/test_pipenv.py b/tests/test_pipenv.py
index b05c7bf4..78692429 100644
--- a/tests/test_pipenv.py
+++ b/tests/test_pipenv.py
@@ -434,7 +434,7 @@ setup(
 tablib = "<0.12"
                 """.strip()
                 f.write(contents)
-            c = p.pipenv(install)
+            c = p.pipenv('install')
             assert c.return_code == 0
             assert 'tablib' in p.pipfile['packages']
             assert 'tablib' in p.lockfile['default']