From eaa8e2352c510858f44c36fe01067bb07bd495cf Mon Sep 17 00:00:00 2001
From: John Kirkham <kirkhamj@janelia.hhmi.org>
Date: Thu, 23 Feb 2017 01:10:47 -0500
Subject: [PATCH 1/3] Try backports.lzma on Python 2.

---
 zarr/codecs.py            | 9 +++++++--
 zarr/tests/test_codecs.py | 9 +++++++--
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/zarr/codecs.py b/zarr/codecs.py
index 94c42ab825..f3bb672742 100644
--- a/zarr/codecs.py
+++ b/zarr/codecs.py
@@ -241,11 +241,16 @@ def __repr__(self):
 codec_registry[BZ2.codec_id] = BZ2
 
 
+lzma = None
 try:
     import lzma
 except ImportError:  # pragma: no cover
-    pass
-else:
+    try:
+        from backports import lzma
+    except ImportError:
+        pass
+
+if lzma:
 
     # noinspection PyShadowingBuiltins
     class LZMA(Codec):
diff --git a/zarr/tests/test_codecs.py b/zarr/tests/test_codecs.py
index 3406af8c06..80547e7bbb 100644
--- a/zarr/tests/test_codecs.py
+++ b/zarr/tests/test_codecs.py
@@ -201,11 +201,16 @@ def test_decode(self):
             self._test_decode_lossless(arr, **config)
 
 
+lzma = None
 try:
     import lzma
 except ImportError:  # pragma: no cover
-    pass
-else:
+    try:
+        from backports import lzma
+    except ImportError:
+        pass
+
+if lzma:
 
     class TestLZMA(CodecTests, unittest.TestCase):
 

From 2a111516a5e98304c06c8cff0d5e13fc107f7781 Mon Sep 17 00:00:00 2001
From: John Kirkham <kirkhamj@janelia.hhmi.org>
Date: Thu, 23 Feb 2017 01:12:24 -0500
Subject: [PATCH 2/3] Test using backport.lzma on Python 2.7 with tox.

---
 tox.ini | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tox.ini b/tox.ini
index 575004f996..3d8c0b6bc0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,6 +10,7 @@ envlist = py27, py34, py35, py36, docs
 setenv =
     PYTHONHASHSEED = 42
 commands =
+    py27: pip install -U backports.lzma
     python setup.py build_ext --inplace
     py27,py34,py35: nosetests -v --with-coverage --cover-erase --cover-package=zarr zarr
     py36: nosetests -v --with-coverage --cover-erase --cover-package=zarr --with-doctest --doctest-options=+NORMALIZE_WHITESPACE zarr

From 3412bf3f8abdbf74f34da3e9cafdda73d5b10486 Mon Sep 17 00:00:00 2001
From: John Kirkham <kirkhamj@janelia.hhmi.org>
Date: Thu, 23 Feb 2017 01:20:22 -0500
Subject: [PATCH 3/3] Ensure `liblzma-dev` is available on Travis CI.

---
 .travis.yml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index d6234f4e48..1bc6e0decf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,12 @@
 language: python
 
+sudo: false
+
+addons:
+  apt:
+    packages:
+      - liblzma-dev
+
 python:
   - 2.7
   - 3.4