[bug#29146] [PATCH] gnu: add python-networkx2.

["Gábor Boskovits" <boskovits@gmail.com>]

* gnu/packages/python.scm (python-networkx2): New variable.
* gnu/local.mk (python-networkx2-reproducible-build.patch): New patch registered.
* gnu/package/patches/python-networkx2-reproducible-build.patch: New file.
---
 gnu/local.mk                                       |  1 +
 .../python-networkx2-reproducible-build.patch      | 29 ++++++++++++++++++++++
 gnu/packages/python.scm                            | 27 ++++++++++++++++++++
 3 files changed, 57 insertions(+)
 create mode 100644 gnu/packages/patches/python-networkx2-reproducible-build.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index dbfe6829e..85969a041 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -993,6 +993,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/python-genshi-isstring-helper.patch	\
   %D%/packages/patches/python-genshi-stripping-of-unsafe-script-tags.patch	\
   %D%/packages/patches/python2-larch-coverage-4.0a6-compatibility.patch \
+  %D%/packages/pathces/python-networkx2-reproducible-build.patch	\
   %D%/packages/patches/python-nose-timer-drop-ordereddict.patch \
   %D%/packages/patches/python-parse-too-many-fields.patch	\
   %D%/packages/patches/python2-rdflib-drop-sparqlwrapper.patch	\
diff --git a/gnu/packages/patches/python-networkx2-reproducible-build.patch b/gnu/packages/patches/python-networkx2-reproducible-build.patch
new file mode 100644
index 000000000..8274767ab
--- /dev/null
+++ b/gnu/packages/patches/python-networkx2-reproducible-build.patch
@@ -0,0 +1,29 @@
+From c065b972ed294769a41936d6b9feb336473af5d1 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?G=C3=A1bor=20Boskovits?= <boskovits@gmail.com>
+Date: Sat, 4 Nov 2017 15:28:47 +0100
+Subject: Fix SOURCE_DATE_EPOCH ignored bug (#2735)
+
+* Fix SOURCE_DATE_EPOCH ignored bug
+
+Fix a bug in networkx/release.py that makes build
+non-reproducible.
+---
+ networkx/release.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/networkx/release.py b/networkx/release.py
+index e81fc0c0..6322cf0d 100644
+--- a/networkx/release.py
++++ b/networkx/release.py
+@@ -135,7 +135,7 @@ def get_revision():
+ 
+ def get_info(dynamic=True):
+     # Date information
+-    date_info = datetime.datetime.now()
++    date_info = datetime.datetime.utcfromtimestamp(int(os.environ.get('SOURCE_DATE_EPOCH', time.time())))
+     date = time.asctime(date_info.timetuple())
+ 
+     revision, version, version_info, vcs_info = None, None, None, None
+-- 
+2.14.2
+
diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index e506f6dfd..4965d9185 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -6624,6 +6624,33 @@ of the structure, dynamics, and functions of complex networks.")
 (define-public python2-networkx
   (package-with-python2 python-networkx))
 
+;define new package, because current version of python-colormath does not compile
+(define-public python-networkx2
+  (package (inherit python-networkx)
+    (name "python-networkx2")
+    (version "2.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+                 (url "https://github.com/networkx/networkx.git")
+       (commit "networkx-2.0")))
+       (sha256
+        (base32
+         "0wsfmbsqzvpb0vdz09rf6rfrkvyq56r8863nn3g4x0m7swygi1w3"))
+       (patches
+        (search-patches "python-networkx2-reproducible-build.patch"))))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'reset-gzip-timestamps 'fix-permissions
+           (lambda _
+             (chmod (string-append (assoc-ref %outputs "out") "/lib/python3.5/site-packages/networkx/generators/atlas.dat.gz") #o666)
+             (chmod (string-append (assoc-ref %outputs "out") "/share/doc/networkx-2.0/examples/drawing/knuth_miles.txt.gz") #o666)
+             (chmod (string-append (assoc-ref %outputs "out") "/share/doc/networkx-2.0/examples/graph/roget_dat.txt.gz") #o666)
+             (chmod (string-append (assoc-ref %outputs "out") "/share/doc/networkx-2.0/examples/graph/words_dat.txt.gz") #o666)
+             #t)))))))
+
 (define-public snakemake
   (package
     (name "snakemake")
-- 
2.14.2