[Python-modules-commits] r17133 - in packages/foolscap/trunk/debian (changelog preinst)

[jtaylor-guest at users.alioth.debian.org]

    Date: Tuesday, May 24, 2011 @ 14:18:42
  Author: jtaylor-guest
Revision: 17133

add preinst to remove egg symlinks installed by 0.6.1-1

there are no guarantees on unpack order, so when the pyshared egg
folder is extracted before the symlinks in /usr/lib/.../dist-packages
the upgrade will fail due to policy 6.6.4  when there are more than
one supported python version as it will try to overwrite a directory
after following the symlink
=> remove egg symlink installed by 0.6.1-1 before unpacking

Added:
  packages/foolscap/trunk/debian/preinst
Modified:
  packages/foolscap/trunk/debian/changelog

Modified: packages/foolscap/trunk/debian/changelog
===================================================================
--- packages/foolscap/trunk/debian/changelog	2011-05-24 12:40:02 UTC (rev 17132)
+++ packages/foolscap/trunk/debian/changelog	2011-05-24 14:18:42 UTC (rev 17133)
@@ -4,6 +4,7 @@
     - needed for testsuite, was indirect over twisted-core before
   * add pydist-override: twisted -> python-twisted-core
   * remove recommend of python-twisted-names, not needed
+  * fix upgrade from 0.6.1-1 by using preinst to remove the old egg symlink
 
  -- Julian Taylor <jtaylor.debian at googlemail.com>  Fri, 20 May 2011 16:26:59 +0200
 

Added: packages/foolscap/trunk/debian/preinst
===================================================================
--- packages/foolscap/trunk/debian/preinst	                        (rev 0)
+++ packages/foolscap/trunk/debian/preinst	2011-05-24 14:18:42 UTC (rev 17133)
@@ -0,0 +1,20 @@
+#!/bin/sh
+set -e
+
+# there are no guarantees on unpack order, so when the pyshared egg
+# folder is extracted before the symlinks in /usr/lib/.../dist-packages
+# the upgrade will fail due to policy 6.6.4  when there are more than
+# one supported python version as it will try to overwrite a directory
+# after following the symlink
+# => remove egg symlink installed by 0.6.1-1 before unpacking
+if [ "$1" = upgrade ] && dpkg --compare-versions "$2" lt "0.6.1-4"; then
+  for f in /usr/lib/python2.*; do
+    # if egg is a link and not pointing to a directory
+    if [ -L "$f/dist-packages/foolscap-0.6.1.egg-info" ] &&
+       [ -f "$f/dist-packages/foolscap-0.6.1.egg-info" ]; then
+      rm -f "$f/dist-packages/foolscap-0.6.1.egg-info";
+    fi
+  done
+fi
+
+#DEBHELPER#