Fix for weird shebangs in recent pip versions

virtualenv_tools.py

@@ -61,23 +61,44 @@ def update_script(script_filename, new_path):
 
     if not lines[0].startswith('#!'):
         return
-    args = lines[0][2:].strip().split()
+
+    if lines[0].startswith('#!/bin/sh') and len(lines) > 1 and \
+       lines[1].startswith("'''exec' "):
+        # Deal with a special form of contrived shebang as generated by pip in
+        # the case of too long shebangs (i.e. when a normal shebang would
+        # exceed the char limit for Linux or Darwin).
+        args = lines[1][9:].strip().split()
+        if not fix_args(args, new_path):
+            return
+
+        lines[1] = "'''exec' %s\n" % ' '.join(args)
+    else:
+        args = lines[0][2:].strip().split()
+        if not fix_args(args, new_path):
+            return
+
+        lines[0] = '#!%s\n' % ' '.join(args)
+
+    print 'S %s' % script_filename
+    with open(script_filename, 'w') as f:
+        f.writelines(lines)
+
+
+def fix_args(args, new_path):
+    """update an argv as found in a shebang"""
     if not args:
-        return
+        return False
 
     if not args[0].endswith('/bin/python') or \
        '/usr/bin/env python' in args[0]:
-        return
+        return False
 
     new_bin = os.path.join(new_path, 'bin', 'python')
     if new_bin == args[0]:
-        return
+        return False
 
     args[0] = new_bin
-    lines[0] = '#!%s\n' % ' '.join(args)
-    print 'S %s' % script_filename
-    with open(script_filename, 'w') as f:
-        f.writelines(lines)
+    return True
 
 
 def update_scripts(bin_dir, new_path):