Support Cygwin's Git on Windows

.appveyor.yml

@@ -21,18 +21,17 @@ environment:
         IS_CONDA: "yes"
         GIT_PATH: "%GIT_DAEMON_PATH%"
 
-      #   ## Cygwin
-      #   #
-      # - PYTHON: "C:\\Miniconda-x64"
-      #   PYTHON_VERSION: "2.7"
-      #   IS_CONDA: "yes"
-      #   GIT_PATH: "%CYGWIN_GIT_PATH%"
-      # - PYTHON: "C:\\Python34-x64"
-      #   PYTHON_VERSION: "3.4"
-      #   GIT_PATH: "%CYGWIN_GIT_PATH%"
-      # - PYTHON: "C:\\Python35-x64"
-      #   PYTHON_VERSION: "3.5"
-      #   GIT_PATH: "%CYGWIN64_GIT_PATH%"
+        ## Cygwin
+        #
+      - PYTHON: "C:\\Miniconda-x64"
+        PYTHON_VERSION: "2.7"
+        IS_CONDA: "yes"
+        IS_CYGWIN: "yes"
+        GIT_PATH: "%CYGWIN_GIT_PATH%"
+      - PYTHON: "C:\\Python35-x64"
+        PYTHON_VERSION: "3.5"
+        GIT_PATH: "%CYGWIN64_GIT_PATH%"
+        IS_CYGWIN: "yes"
 
 
 install:
@@ -48,14 +47,12 @@ install:
         python --version
         python -c "import struct; print(struct.calcsize('P') * 8)"
 
-    - IF "%IS_CONDA%"=="yes" (
+    - IF "%IS_CONDA%" == "yes" (
         conda info -a &
         conda install --yes --quiet  pip
       )
-    - pip install  nose ddt wheel codecov
-    -   IF "%PYTHON_VERSION%"=="2.7" (
-            pip install mock
-        )
+    - pip install -r test-requirements.txt
+    - pip install codecov
 
     ## Copied from `init-tests-after-clone.sh`.
     #
@@ -79,7 +76,15 @@ install:
 build: false
 
 test_script:
-    - IF "%PYTHON_VERSION%"=="3.5" (nosetests -v --with-coverage) ELSE (nosetests -v)
+    -   IF "%IS_CYGWIN%" == "yes" (
+            nosetests -v
+        ) ELSE (
+            IF "%PYTHON_VERSION%" == "3.5" (
+                nosetests -v --with-coverage
+            ) ELSE (
+                nosetests -v
+            )
+        )
 
 on_success:
-    - IF "%PYTHON_VERSION%"=="3.5" (codecov)
+    - IF "%PYTHON_VERSION%" == "3.5" IF NOT "%IS_CYGWIN%" == "yes" (codecov)

.travis.yml

@@ -1,14 +1,10 @@
 language: python
 python:
-  - "2.6"
   - "2.7"
   - "3.3"
   - "3.4"
   - "3.5"
   # - "pypy" - won't work as smmap doesn't work (see gitdb/.travis.yml for details)
-matrix:
-  allow_failures:
-    - python: "2.6"
 git:
   # a higher depth is needed for most of the tests - must be high enough to not actually be shallow
   # as we clone our own repository in the process
@@ -17,7 +13,8 @@ install:
   - python --version; git --version
   - git submodule update --init --recursive
   - git fetch --tags
-  - pip install codecov flake8 ddt sphinx
+  - pip install -r test-requirements.txt
+  - pip install codecov sphinx
 
   # generate some reflog as git-python tests need it (in master)
   - ./init-tests-after-clone.sh

git/__init__.py

@@ -5,9 +5,12 @@
 # the BSD License: http://www.opensource.org/licenses/bsd-license.php
 # flake8: noqa
 #@PydevCodeAnalysisIgnore
+import inspect
 import os
 import sys
-import inspect
+
+import os.path as osp
+
 
 __version__ = 'git'
 
@@ -16,7 +19,7 @@
 def _init_externals():
     """Initialize external projects by putting them into the path"""
     if __version__ == 'git':
-        sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'ext', 'gitdb'))
+        sys.path.insert(0, osp.join(osp.dirname(__file__), 'ext', 'gitdb'))
 
     try:
         import gitdb

git/cmd.py

@@ -31,6 +31,7 @@
 )
 from git.exc import CommandError
 from git.odict import OrderedDict
+from git.util import is_cygwin_git, cygpath
 
 from .exc import (
     GitCommandError,
@@ -191,8 +192,26 @@ def __setstate__(self, d):
     USE_SHELL = False
 
     @classmethod
-    def polish_url(cls, url):
-        return url.replace("\\\\", "\\").replace("\\", "/")
+    def is_cygwin(cls):
+        return is_cygwin_git(cls.GIT_PYTHON_GIT_EXECUTABLE)
+
+    @classmethod
+    def polish_url(cls, url, is_cygwin=None):
+        if is_cygwin is None:
+            is_cygwin = cls.is_cygwin()
+
+        if is_cygwin:
+            url = cygpath(url)
+        else:
+            """Remove any backslahes from urls to be written in config files.
+
+            Windows might create config-files containing paths with backslashed,
+            but git stops liking them as it will escape the backslashes.
+            Hence we undo the escaping just to be sure.
+            """
+            url = url.replace("\\\\", "\\").replace("\\", "/")
+
+        return url
 
     class AutoInterrupt(object):
         """Kill/Interrupt the stored process instance once this instance goes out of scope. It is

git/config.py

@@ -6,21 +6,13 @@
 """Module containing module parser implementation able to properly read and write
 configuration files"""
 
-import re
-try:
-    import ConfigParser as cp
-except ImportError:
-    # PY3
-    import configparser as cp
+import abc
+from functools import wraps
 import inspect
 import logging
-import abc
 import os
+import re
 
-from functools import wraps
-
-from git.odict import OrderedDict
-from git.util import LockFile
 from git.compat import (
     string_types,
     FileType,
@@ -29,6 +21,18 @@
     with_metaclass,
     PY3
 )
+from git.odict import OrderedDict
+from git.util import LockFile
+
+import os.path as osp
+
+
+try:
+    import ConfigParser as cp
+except ImportError:
+    # PY3
+    import configparser as cp
+
 
 __all__ = ('GitConfigParser', 'SectionConstraint')
 
@@ -408,15 +412,15 @@ def read(self):
             if self._has_includes():
                 for _, include_path in self.items('include'):
                     if include_path.startswith('~'):
-                        include_path = os.path.expanduser(include_path)
-                    if not os.path.isabs(include_path):
+                        include_path = osp.expanduser(include_path)
+                    if not osp.isabs(include_path):
                         if not file_ok:
                             continue
                         # end ignore relative paths if we don't know the configuration file path
-                        assert os.path.isabs(file_path), "Need absolute paths to be sure our cycle checks will work"
-                        include_path = os.path.join(os.path.dirname(file_path), include_path)
+                        assert osp.isabs(file_path), "Need absolute paths to be sure our cycle checks will work"
+                        include_path = osp.join(osp.dirname(file_path), include_path)
                     # end make include path absolute
-                    include_path = os.path.normpath(include_path)
+                    include_path = osp.normpath(include_path)
                     if include_path in seen or not os.access(include_path, os.R_OK):
                         continue
                     seen.add(include_path)

git/db.py

@@ -1,12 +1,9 @@
 """Module with our own gitdb implementation - it uses the git command"""
+from git.util import bin_to_hex, hex_to_bin
 from gitdb.base import (
     OInfo,
     OStream
 )
-from gitdb.util import (
-    bin_to_hex,
-    hex_to_bin
-)
 from gitdb.db import GitDB  # @UnusedImport
 from gitdb.db import LooseObjectDB
 

git/diff.py

@@ -5,18 +5,17 @@
 # the BSD License: http://www.opensource.org/licenses/bsd-license.php
 import re
 
-from gitdb.util import hex_to_bin
+from git.cmd import handle_process_output
+from git.compat import (
+    defenc,
+    PY3
+)
+from git.util import finalize_process, hex_to_bin
 
 from .compat import binary_type
 from .objects.blob import Blob
 from .objects.util import mode_str_to_int
 
-from git.compat import (
-    defenc,
-    PY3
-)
-from git.cmd import handle_process_output
-from git.util import finalize_process
 
 __all__ = ('Diffable', 'DiffIndex', 'Diff', 'NULL_TREE')