Add a wrapper shell script for very long shebang scripts for all installed files.

src/zc/buildout/buildout.py

@@ -44,6 +44,7 @@ import os
 import pkg_resources
 import re
 import shutil
+import stat
 import subprocess
 import sys
 import tempfile
@@ -213,6 +214,42 @@ def _format_picked_versions(picked_versions, required_by):
     output.extend(required_output)
     return output
 
+def _fix_shebang(installed_files):
+    is_executable = stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
+    path_list = installed_files.splitlines()
+    for path in path_list:
+        if os.path.isdir(path):
+            file_list = []
+            for (dirpath, _, filename_list) in os.walk(path):
+                if dirpath.endswith('/EGG-INFO/scripts'):
+                    # shebang conversion of egg scripts will be done in
+                    # zc.buildout.easy_install.script
+                    continue
+                for filename in filename_list:
+                    file_path = os.path.join(dirpath, filename)
+                    if os.path.isfile(file_path):
+                        file_list.append(file_path)
+        else:
+            file_list = [path]
+        for file_path in file_list:
+            if file_path.endswith('.shebang') or os.path.islink(file_path):
+                continue
+            st_mode = os.stat(file_path).st_mode
+            if not st_mode & is_executable:
+                continue
+            header = file(file_path).readline(128)
+            m = re.match('^#! ?(/.*)', header)
+            if not m or len(header) < 128:
+                continue
+            shebang_abspath = file_path + '.shebang'
+            os.rename(file_path, shebang_abspath)
+            file(file_path, 'w').write('''#!/bin/sh
+exec %s "%s.shebang" "$@"
+''' % (m.groups()[0], file_path))
+            os.chmod(file_path, stat.S_IMODE(st_mode))
+            if not os.path.isdir(path):
+                path_list.append(shebang_abspath)
+    return '\n'.join(sorted(path_list))
 
 _buildout_default_options = _annotate_section({
     'allow-hosts': '*',
@@ -812,6 +849,7 @@ class Buildout(DictMixin):
                 elif not isinstance(installed_files, str):
                     installed_files = '\n'.join(installed_files)
 
+            installed_files = _fix_shebang(installed_files)
             saved_options['__buildout_installed__'] = installed_files
             saved_options['__buildout_signature__'] = signature
             installed_part_options[part] = saved_options