Fix an error on Python 3.5+ for git dependencies with recursive symlinks

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 - Fixed a recursion error with circular dependencies.
 - Fixed the `config` command setting incorrect values for paths.
+- Fixed an `OSError` on Python >= 3.5 for `git` dependencies with recursive symlinks.
 
 
 ## [0.11.4] - 2018-07-30

poetry/puzzle/provider.py

+import glob
 import logging
 import os
 import pkginfo
@@ -25,6 +26,7 @@ from poetry.mixology.term import Term
 
 from poetry.repositories import Pool
 
+from poetry.utils._compat import PY35
 from poetry.utils._compat import Path
 from poetry.utils.helpers import parse_requires
 from poetry.utils.toml_file import TomlFile
@@ -193,6 +195,19 @@ class Provider:
                 try:
                     venv.run("python", "setup.py", "egg_info")
 
+                    # Sometimes pathlib will fail on recursive
+                    # symbolic links, so we need to workaround it
+                    # and use the glob module instead.
+                    # Note that this does not happen with pathlib2
+                    # so it's safe to use it for Python < 3.4.
+                    if PY35:
+                        egg_info = next(
+                            Path(p)
+                            for p in glob.glob(
+                                os.path.join(str(tmp_dir), "**", "*.egg-info")
+                            )
+                        )
+                    else:
                         egg_info = next(tmp_dir.glob("**/*.egg-info"))
 
                     meta = pkginfo.UnpackedSDist(str(egg_info))

poetry/utils/_compat.py

@@ -17,6 +17,7 @@ except NameError:  # Python 3
 
 
 PY2 = sys.version_info[0] == 2
+PY35 = sys.version_info >= (3, 5)
 PY36 = sys.version_info >= (3, 6)