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08/103: gnu: python-2.7: Add all guix prefixes in PYTHONPATH to site-pre


From: Hartmut Goebel
Subject: 08/103: gnu: python-2.7: Add all guix prefixes in PYTHONPATH to site-prefixes.
Date: Tue, 25 Oct 2016 17:47:45 +0000 (UTC)

htgoebel pushed a commit to branch wip-python-build-system
in repository guix.

commit 51f127f1fe03c0d9e7173eb572431e193346bfb2
Author: Hartmut Goebel <address@hidden>
Date:   Tue Oct 18 00:11:05 2016 +0200

    gnu: python-2.7: Add all guix prefixes in PYTHONPATH to site-prefixes.
    
    * gnu/packages/patches/python-2.7-site-prefixes.patch: New file.
    * gnu/packages/python.scm (python-2)[source]: Use it.
    * gnu/local.mk (dist_patch_DATA): Add patch.
---
 gnu/local.mk                                       |    1 +
 .../patches/python-2.7-site-prefixes.patch         |   26 ++++++++++++++++++++
 gnu/packages/python.scm                            |    1 +
 3 files changed, 28 insertions(+)

diff --git a/gnu/local.mk b/gnu/local.mk
index ff2d976..4131fab 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -796,6 +796,7 @@ dist_patch_DATA =                                           
\
   %D%/packages/patches/pyqt-configure.patch                    \
   %D%/packages/patches/python-2-deterministic-build-info.patch \
   %D%/packages/patches/python-2.7-search-paths.patch           \
+  %D%/packages/patches/python-2.7-site-prefixes.patch          \
   %D%/packages/patches/python-2.7-source-date-epoch.patch      \
   %D%/packages/patches/python-3-deterministic-build-info.patch \
   %D%/packages/patches/python-3-search-paths.patch             \
diff --git a/gnu/packages/patches/python-2.7-site-prefixes.patch 
b/gnu/packages/patches/python-2.7-site-prefixes.patch
new file mode 100644
index 0000000..9e30665
--- /dev/null
+++ b/gnu/packages/patches/python-2.7-site-prefixes.patch
@@ -0,0 +1,26 @@
+Add all /gnu/store/ prefixes found in PYTHONPATH to the prefixes where
+site-packages (and .pth files) are searched.
+
+*** Python-2.7.11/Lib/site.py.orig     2016-10-17 23:27:23.746149690 +0200
+--- Python-2.7.11/Lib/site.py  2016-10-17 23:44:51.930871644 +0200
+***************
+*** 65,70 ****
+--- 65,82 ----
+  
+  # Prefixes for site-packages; add additional prefixes like /usr/local here
+  PREFIXES = [sys.prefix, sys.exec_prefix]
++ # Guix: Add all /gnu/store-paths in PYTHONPATH--these are all
++ # "prefixes".  This is required to search .pth files in all python
++ # packages contained in /gnu/store which is required to make
++ # .pth-defined namespace packages work.
++ # This is necessary if the packages are not merged into a single
++ # `site-packages` directory (like when using `guix environment`) but
++ # listed in PYTHONPATH (like when running `guix build`).
++ for p in sys.path:
++     if p.startswith('/gnu/store/'):
++         PREFIXES.append(p[:p.find('/', 44)]) # find first pathsep after hash
++ del p
++ 
+  # Enable per user site-packages directory
+  # set it to False to disable the feature or True to force the feature
+  ENABLE_USER_SITE = None
diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index d8344c3..dd569f4 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -117,6 +117,7 @@
         "0iiz844riiznsyhhyy962710pz228gmhv8qi3yk4w4jhmx2lqawn"))
       (patches (search-patches "python-2.7-search-paths.patch"
                                "python-2-deterministic-build-info.patch"
+                               "python-2.7-site-prefixes.patch"
                                "python-2.7-source-date-epoch.patch"))
       (modules '((guix build utils)))
       ;; suboptimal to delete failing tests here, but if we delete them in the



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