Fix "eggsecutables" (such as setuptools' own egg) only being runnable

with bash-compatible shells.  (backport from trunk)

--HG--
branch : setuptools-0.6
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/branches/setuptools-0.6%4053540

setuptools.txt

@@ -2603,6 +2603,9 @@ Release Notes/Change History
 0.6c6
  * Fix not building binary RPMs correctly.
 
+ * Fix "eggsecutables" (such as setuptools' own egg) only being runnable with
+   bash-compatible shells.
+
 0.6c5
  * Fix uploaded ``bdist_rpm`` packages being described as ``bdist_egg``
    packages under Python versions less than 2.5.

setuptools/command/bdist_egg.py

@@ -305,7 +305,7 @@ class bdist_egg(Command):
 
         header = (
             "#!/bin/sh\n"
-            'if [[ `basename $0` = "%(basename)s" ]]\n'
+            'if [ `basename $0` = "%(basename)s" ]\n'
             'then exec python%(pyver)s -c "'
             "import sys, os; sys.path.insert(0, os.path.abspath('$0')); "
             "from %(pkg)s import %(base)s; sys.exit(%(full)s())"