Create a wrapper shell script for very long shebang scripts.

slapos/recipe/cmmi/__init__.py

@@ -8,6 +8,7 @@ import pkg_resources
 from platform import machine as platform_machine
 import re
 import shutil
+import stat
 import subprocess
 import sys
 import zc.buildout
@@ -395,4 +396,29 @@ class Recipe(object):
 
         if self.options['share'] == '':
             parts.append(self.options['default-location'])
+
+        self.fix_shebang(self.options['default-location'])
         return parts
+
+    def fix_shebang(self, location):
+        # Workaround for shebang line limit by renaming the script and
+        # putting a wrapper shell script.
+        for dir in ('bin', 'sbin'):
+            dir_abspath = os.path.join(location, dir)
+            if not os.path.isdir(dir_abspath):
+                continue
+            for f in os.listdir(dir_abspath):
+                f_abspath = os.path.join(dir_abspath, f)
+                if not os.path.isfile(f_abspath):
+                    continue
+                header = file(f_abspath).readline(128)
+                m = re.match('^#! ?(/.*)', header)
+                if not m or len(header) < 128:
+                    continue
+                shebang_abspath = f_abspath + '.shebang'
+                os.rename(f_abspath, shebang_abspath)
+                file(f_abspath, 'w').write('''#!/bin/sh
+shebang=$(head -1 "$0.shebang")
+exec ${shebang#\#!} "$0.shebang" "$@"
+''')
+                os.chmod(f_abspath, stat.S_IMODE(os.stat(shebang_abspath).st_mode))