From 2e14d32bf279be1c3fa360f95aaf07cdeb1832f8 Mon Sep 17 00:00:00 2001
From: Prodesire <prodesire@yeah.net>
Date: Sat, 2 Dec 2017 10:32:11 +0800
Subject: [PATCH 1/4] Add platform to help judge which platform we are working
 on

---
 pydu/platform.py | 4 ++++
 1 file changed, 4 insertions(+)
 create mode 100644 pydu/platform.py

diff --git a/pydu/platform.py b/pydu/platform.py
new file mode 100644
index 0000000..4236cb2
--- /dev/null
+++ b/pydu/platform.py
@@ -0,0 +1,4 @@
+import os
+
+
+WINDOWS = os.name == 'nt'

From 95d366771d9f8497747762516590c39f60f614fd Mon Sep 17 00:00:00 2001
From: Prodesire <prodesire@yeah.net>
Date: Sat, 2 Dec 2017 10:33:55 +0800
Subject: [PATCH 2/4] Fix #2, file.link only available on No Windows platform

---
 pydu/file.py | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/pydu/file.py b/pydu/file.py
index 4c8bf9e..2c72e5b 100644
--- a/pydu/file.py
+++ b/pydu/file.py
@@ -1,6 +1,7 @@
 import os
 import sys
 import shutil
+from pydu.platform import WINDOWS
 
 
 # todo tests and docs
@@ -80,19 +81,6 @@ def open_file(path, mode='wb+', buffer_size=-1, ignore_errors=False):
     return f
 
 
-def link(src, dst, overwrite=False, ignore_errors=False):
-    try:
-        if os.path.exists(dst):
-            if overwrite:
-                remove(dst)
-            else:
-                return
-        os.link(src, dst)
-    except Exception:
-        if not ignore_errors:
-            raise OSError('Link {} to {} error'.format(dst, src))
-
-
 def copy(src, dst, ignore_errors=False, follow_symlinks=True):
     try:
         if os.path.isdir(src):
@@ -102,3 +90,17 @@ def copy(src, dst, ignore_errors=False, follow_symlinks=True):
     except Exception:
         if not ignore_errors:
             raise OSError('Copy {} to {} error'.format(src, dst))
+
+
+if not WINDOWS:
+    def link(src, dst, overwrite=False, ignore_errors=False):
+        try:
+            if os.path.exists(dst):
+                if overwrite:
+                    remove(dst)
+                else:
+                    return
+            os.link(src, dst)
+        except Exception:
+            if not ignore_errors:
+                raise OSError('Link {} to {} error'.format(dst, src))

From afe7fa6bdc7cb9175d80081635e067743b7b3705 Mon Sep 17 00:00:00 2001
From: Prodesire <prodesire@yeah.net>
Date: Sat, 2 Dec 2017 10:37:59 +0800
Subject: [PATCH 3/4] rename Testmakedirs to TestMakeDirs

---
 tests/test_file.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tests/test_file.py b/tests/test_file.py
index a4260a7..714ad66 100644
--- a/tests/test_file.py
+++ b/tests/test_file.py
@@ -1,9 +1,9 @@
 import os
-from pydu.file import makedirs
 import pytest
+from pydu.file import makedirs
 
 
-class Testmakedirs():
+class TestMakeDirs:
     def test_makedirs(self, tmpdir):
         path = str(tmpdir.join('test'))
         makedirs(path)
@@ -33,3 +33,5 @@ class Testmakedirs():
         path = str(tmpdir.join('test/test'))
         makedirs(path)
         assert os.path.exists(path)
+
+

From d60bc2e3b8bbc202b979427a343a34051afd9b11 Mon Sep 17 00:00:00 2001
From: Prodesire <prodesire@yeah.net>
Date: Sat, 2 Dec 2017 11:09:05 +0800
Subject: [PATCH 4/4] add test for file.link

---
 pydu/file.py       |  5 +++++
 tests/test_file.py | 20 +++++++++++++++++++-
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/pydu/file.py b/pydu/file.py
index 2c72e5b..d648cae 100644
--- a/pydu/file.py
+++ b/pydu/file.py
@@ -92,6 +92,11 @@ def copy(src, dst, ignore_errors=False, follow_symlinks=True):
             raise OSError('Copy {} to {} error'.format(src, dst))
 
 
+def touch(path):
+    with open(path, 'w'):
+        pass
+
+
 if not WINDOWS:
     def link(src, dst, overwrite=False, ignore_errors=False):
         try:
diff --git a/tests/test_file.py b/tests/test_file.py
index 714ad66..4afc240 100644
--- a/tests/test_file.py
+++ b/tests/test_file.py
@@ -1,6 +1,10 @@
 import os
 import pytest
-from pydu.file import makedirs
+from pydu.platform import WINDOWS
+from pydu.file import makedirs, remove, removes, open_file, copy, touch
+
+if not WINDOWS:
+    from pydu.file import link
 
 
 class TestMakeDirs:
@@ -35,3 +39,17 @@ class TestMakeDirs:
         assert os.path.exists(path)
 
 
+def test_touch(tmpdir):
+    path = str(tmpdir.join('test'))
+    touch(path)
+    assert os.path.isfile(path)
+
+
+@pytest.mark.skipIf(WINDOWS)
+class TestLink:
+    def test_link(self, tmpdir):
+        src = str(tmpdir.join('src'))
+        dst = str(tmpdir.join('dst'))
+        touch(src)
+        link(src, dst)
+        assert os.path.exists(dst)