slapos.rebootstrap 3.1

Usage

Part to build python is required. By convention slapos.rebootstrap will try to find python executable in:

special.parts.directory/partname/bin/partname

But when needed python-path parameter can be used to point rebootstrap to find python in:

special.parts.directory/partname/python-path

Add slapos.rebootstrap to extensions and set rebooter-section to above section.

Use whatever python to bootstrap and run buildout. If reboot will detect that sys.executable used to run buildout is different then executable provided in python section it will try to find this executable. If it does not exists it will install this section and then reinstall buildout using new python executable. Later buildout run will continue using new python.

Because external buildout is used to provide buildout version parameter is introduced to being able to upgrade not in place python part. This parameter is required and becomes part of suffix.

Whenever developer-mode is set to true no cleanup will be done in case of failure. Then user is responsible to cleanup directories.

Example profile and invocation

[buildout]
extensions = slapos.rebootstrap

parts =
  realrun

[rebootstrap]
section = slapospython
version = 1

[slapospython]
recipe = plone.recipe.command
stop-on-error = true
command = mkdir -p ${buildout:parts-directory}/${:__section_name__}/bin &&
  cp -f /usr/bin/python ${:executable}

[realrun]
recipe = plone.recipe.command
command =
  echo Running with python ${buildout:executable}
update-command = ${:command}

After bootstrapping and running this buildout it will print:

Running with python /path/to/buildout/parts.rebootstrap.1/slapospython/bin/slapospython

Running tests

Test for this package can be run as simple as:

$ python setup.py test

Please keep in mind that clean python environment is required – the best one is provided by buildout or virtualenv WITHOUT site packages.

3.1 (2011-06-24)

• Support eggs parameter in rebootstrap section in order to add additional eggs for rebootstrapped buildout. [Łukasz Nowak]

3.0 (2011-05-27)

• Renamed from slapos.tool.rebootstrap 2.4 [Łukasz Nowak]

Support for extensions

>>> import sys
>>> mkdir(sample_buildout, 'recipes')
>>> write(sample_buildout, 'recipes', 'setup.py',
... """
... from setuptools import setup
...
... setup(
...     name = "recipes",
...     entry_points = {'zc.buildout':[
...             'pyinstall = pyinstall:Pyinstall',
...             'pyshow = pyshow:Pyshow',
...     ],
...     'zc.buildout.extension': ['ext = extension:extension'],},
...     )
... """)
>>> write(sample_buildout, 'recipes', 'README.txt', " ")
>>> write(sample_buildout, 'recipes', 'extension.py',
... """
... def extension(buildout):
...     print 'Special extension run'
... """)
>>> write(sample_buildout, 'recipes', 'pyinstall.py',
... """
... import os, zc.buildout, shutil, sys
...
... class Pyinstall:
...
...     def __init__(self, buildout, name, options):
...         self.name, self.options = name, options
...         self.destination = os.path.join(buildout['buildout'][
...             'parts-directory'], self.options.get('python', name))
...
...     def install(self):
...         for d in [self.destination, os.path.join(self.destination, 'bin')]:
...           if not os.path.exists(d):
...               os.mkdir(d)
...         python = os.path.join(self.destination, 'bin', self.name)
...         if not os.path.exists(python):
...             shutil.copy(sys.executable, python)
...         return []
...
...     update = install
... """)
>>> write(sample_buildout, 'recipes', 'pyshow.py',
... """
... import os, zc.buildout, shutil, sys
...
... class Pyshow:
...
...     def __init__(self, buildout, name, options):
...         self.name, self.options = name, options
...
...     def install(self):
...         print 'Running with:', sys.executable
...         return []
...
...     update = install
... """)
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes
... parts =
... """)
>>> print system(buildout),
Develop: '/sample-buildout/recipes'
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes
... extensions = slapos.rebootstrap recipes
...
... parts =
...   realrun
...
... [rebootstrap]
... section =
...   installpython
... version =
...   1
...
... [installpython]
... recipe = recipes:pyinstall
...
... [realrun]
... recipe = recipes:pyshow
... """ % dict(syspython=sys.executable))
>>> print system(buildout),
slapos.rebootstrap: Installing section 'installpython' to provide '/sample-buildout/rebootstrap.1.parts/installpython/bin/installpython' in '/sample-buildout/rebootstrap.1.parts'
slapos.rebootstrap: Rerunning buildout to install section installpython with arguments ['/sample-buildout/bin/buildout', 'buildout:parts=installpython', 'buildout:extensions=recipes', '/sample-buildout/rebootstrap.1.parts', 'buildout:installed=.rebootstrap.1.installed.cfg'].
Special extension run
Creating directory '/sample-buildout/rebootstrap.1.parts'.
Develop: '/sample-buildout/recipes'
Installing installpython.
slapos.rebootstrap:
************ REBOOTSTRAP: IMPORTANT NOTICE ************
bin/buildout is being reinstalled right now, as new python:
  /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython
is available, and buildout is using another python:
  /system_python
Buildout will be restarted automatically to have this change applied.
************ REBOOTSTRAP: IMPORTANT NOTICE ************
<BLANKLINE>
Generated script '/sample-buildout/bin/buildout'.
Special extension run
Develop: '/sample-buildout/recipes'
Installing realrun.
Running with: /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython

Support for additional eggs

>>> import sys
>>> mkdir(sample_buildout, 'addegg')
>>> write(sample_buildout, 'addegg', 'setup.py',
... """
... from setuptools import setup
...
... setup(
...     name = "additionalegg",
...     entry_points = {'zc.buildout.extension':[
...         'extension = extension:extension',
...     ]},
...     )
... """)
>>> write(sample_buildout, 'addegg', 'extension.py',
... """
... def extension(buildout):
...   print 'Extension available in buildout.'
... """)
>>> write(sample_buildout, 'addegg', 'README.txt', " ")
>>> mkdir(sample_buildout, 'recipes')
>>> write(sample_buildout, 'recipes', 'setup.py',
... """
... from setuptools import setup
...
... setup(
...     name = "recipes",
...     entry_points = {'zc.buildout':[
...             'pyinstall = pyinstall:Pyinstall',
...             'pyshow = pyshow:Pyshow',
...     ]},
...     )
... """)
>>> write(sample_buildout, 'recipes', 'README.txt', " ")
>>> write(sample_buildout, 'recipes', 'pyinstall.py',
... """
... import os, zc.buildout, shutil, sys
...
... class Pyinstall:
...
...     def __init__(self, buildout, name, options):
...         self.name, self.options = name, options
...         self.destination = os.path.join(buildout['buildout'][
...             'parts-directory'], self.options.get('python', name))
...
...     def install(self):
...         for d in [self.destination, os.path.join(self.destination, 'bin')]:
...           if not os.path.exists(d):
...               os.mkdir(d)
...         python = os.path.join(self.destination, 'bin', self.name)
...         if not os.path.exists(python):
...             shutil.copy(sys.executable, python)
...         return []
...
...     update = install
... """)
>>> write(sample_buildout, 'recipes', 'pyshow.py',
... """
... import os, zc.buildout, shutil, sys
...
... class Pyshow:
...
...     def __init__(self, buildout, name, options):
...         self.name, self.options = name, options
...
...     def install(self):
...         print 'Running with:', sys.executable
...         return []
...
...     update = install
... """)
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes addegg
... parts =
... """)
>>> print system(buildout),
Develop: '/sample-buildout/recipes'
Develop: '/sample-buildout/addegg'
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes addegg
... extensions = slapos.rebootstrap
...
... parts =
...   realrun
...
... [rebootstrap]
... section =
...   installpython
... version =
...   1
... eggs =
...   additionalegg
...
... [installpython]
... recipe = recipes:pyinstall
...
... [realrun]
... recipe = recipes:pyshow
... """ % dict(syspython=sys.executable))
>>> print system(buildout),
slapos.rebootstrap: Installing section 'installpython' to provide '/sample-buildout/rebootstrap.1.parts/installpython/bin/installpython' in '/sample-buildout/rebootstrap.1.parts'
slapos.rebootstrap: Rerunning buildout to install section installpython with arguments ['/sample-buildout/bin/buildout', 'buildout:parts=installpython', 'buildout:extensions=', '/sample-buildout/rebootstrap.1.parts', 'buildout:installed=.rebootstrap.1.installed.cfg'].
Creating directory '/sample-buildout/rebootstrap.1.parts'.
Develop: '/sample-buildout/recipes'
Develop: '/sample-buildout/addegg'
Installing installpython.
slapos.rebootstrap:
************ REBOOTSTRAP: IMPORTANT NOTICE ************
bin/buildout is being reinstalled right now, as new python:
  /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython
is available, and buildout is using another python:
  /system_python
Buildout will be restarted automatically to have this change applied.
************ REBOOTSTRAP: IMPORTANT NOTICE ************
<BLANKLINE>
Generated script '/sample-buildout/bin/buildout'.
Extension available in buildout.
Develop: '/sample-buildout/recipes'
Develop: '/sample-buildout/addegg'
Installing realrun.
Running with: /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython

Default invocation

>>> import sys
>>> mkdir(sample_buildout, 'recipes')
>>> write(sample_buildout, 'recipes', 'setup.py',
... """
... from setuptools import setup
...
... setup(
...     name = "recipes",
...     entry_points = {'zc.buildout':[
...             'pyinstall = pyinstall:Pyinstall',
...             'pyshow = pyshow:Pyshow',
...     ]},
...     )
... """)
>>> write(sample_buildout, 'recipes', 'README.txt', " ")
>>> write(sample_buildout, 'recipes', 'pyinstall.py',
... """
... import os, zc.buildout, shutil, sys
...
... class Pyinstall:
...
...     def __init__(self, buildout, name, options):
...         self.name, self.options = name, options
...         self.destination = os.path.join(buildout['buildout'][
...             'parts-directory'], self.options.get('python', name))
...
...     def install(self):
...         for d in [self.destination, os.path.join(self.destination, 'bin')]:
...           if not os.path.exists(d):
...               os.mkdir(d)
...         python = os.path.join(self.destination, 'bin', self.name)
...         if not os.path.exists(python):
...             shutil.copy(sys.executable, python)
...         return []
...
...     update = install
... """)
>>> write(sample_buildout, 'recipes', 'pyshow.py',
... """
... import os, zc.buildout, shutil, sys
...
... class Pyshow:
...
...     def __init__(self, buildout, name, options):
...         self.name, self.options = name, options
...
...     def install(self):
...         print 'Running with:', sys.executable
...         return []
...
...     update = install
... """)
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes
... parts =
... """)
>>> print system(buildout),
Develop: '/sample-buildout/recipes'
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes
... extensions = slapos.rebootstrap
...
... parts =
...   realrun
...
... [rebootstrap]
... section =
...   installpython
... version =
...   1
...
... [installpython]
... recipe = recipes:pyinstall
...
... [realrun]
... recipe = recipes:pyshow
... """ % dict(syspython=sys.executable))
>>> print system(buildout),
slapos.rebootstrap: Installing section 'installpython' to provide '/sample-buildout/rebootstrap.1.parts/installpython/bin/installpython' in '/sample-buildout/rebootstrap.1.parts'
slapos.rebootstrap: Rerunning buildout to install section installpython with arguments ['/sample-buildout/bin/buildout', 'buildout:parts=installpython', 'buildout:extensions=', '/sample-buildout/rebootstrap.1.parts', 'buildout:installed=.rebootstrap.1.installed.cfg'].
Creating directory '/sample-buildout/rebootstrap.1.parts'.
Develop: '/sample-buildout/recipes'
Installing installpython.
slapos.rebootstrap:
************ REBOOTSTRAP: IMPORTANT NOTICE ************
bin/buildout is being reinstalled right now, as new python:
  /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython
is available, and buildout is using another python:
  /system_python
Buildout will be restarted automatically to have this change applied.
************ REBOOTSTRAP: IMPORTANT NOTICE ************
<BLANKLINE>
Generated script '/sample-buildout/bin/buildout'.
Develop: '/sample-buildout/recipes'
Installing realrun.
Running with: /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython

Support of own python path

>>> import sys
>>> mkdir(sample_buildout, 'recipes')
>>> write(sample_buildout, 'recipes', 'setup.py',
... """
... from setuptools import setup
...
... setup(
...     name = "recipes",
...     entry_points = {'zc.buildout':[
...             'pyinstall = pyinstall:Pyinstall',
...             'pyshow = pyshow:Pyshow',
...     ]},
...     )
... """)
>>> write(sample_buildout, 'recipes', 'README.txt', " ")
>>> write(sample_buildout, 'recipes', 'pyinstall.py',
... """
... import os, zc.buildout, shutil, sys
...
... class Pyinstall:
...
...     def __init__(self, buildout, name, options):
...         self.name, self.options = name, options
...         self.destination = os.path.join(buildout['buildout'][
...             'parts-directory'], name)
...
...     def install(self):
...         for d in [self.destination, os.path.join(self.destination, 'bin')]:
...           if not os.path.exists(d):
...               os.mkdir(d)
...         python = self.options.get('python', os.path.join('bin', self.name))
...         python = os.path.join(self.destination, python)
...         if not os.path.exists(python):
...             shutil.copy(sys.executable, python)
...         return []
...
...     update = install
... """)
>>> write(sample_buildout, 'recipes', 'pyshow.py',
... """
... import os, zc.buildout, shutil, sys
...
... class Pyshow:
...
...     def __init__(self, buildout, name, options):
...         self.name, self.options = name, options
...
...     def install(self):
...         print 'Running with:', sys.executable
...         return []
...
...     update = install
... """)
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes
... parts =
... """)
>>> print system(buildout),
Develop: '/sample-buildout/recipes'
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes
... extensions = slapos.rebootstrap
...
... parts =
...   realrun
...
... [rebootstrap]
... section =
...   installpython
... version =
...   1
... python-path =
...  anotherpython
...
... [installpython]
... recipe = recipes:pyinstall
... python = anotherpython
...
... [realrun]
... recipe = recipes:pyshow
... """ % dict(syspython=sys.executable))
>>> print system(buildout),
slapos.rebootstrap: Installing section 'installpython' to provide '/sample-buildout/rebootstrap.1.parts/installpython/anotherpython' in '/sample-buildout/rebootstrap.1.parts'
slapos.rebootstrap: Rerunning buildout to install section installpython with arguments ['/sample-buildout/bin/buildout', 'buildout:parts=installpython', 'buildout:extensions=', '/sample-buildout/rebootstrap.1.parts', 'buildout:installed=.rebootstrap.1.installed.cfg'].
Creating directory '/sample-buildout/rebootstrap.1.parts'.
Develop: '/sample-buildout/recipes'
Installing installpython.
slapos.rebootstrap:
************ REBOOTSTRAP: IMPORTANT NOTICE ************
bin/buildout is being reinstalled right now, as new python:
  /sample_buildout/rebootstrap.1.parts/installpython/anotherpython
is available, and buildout is using another python:
  /system_python
Buildout will be restarted automatically to have this change applied.
************ REBOOTSTRAP: IMPORTANT NOTICE ************
<BLANKLINE>
Generated script '/sample-buildout/bin/buildout'.
Develop: '/sample-buildout/recipes'
Installing realrun.
Running with: /sample_buildout/rebootstrap.1.parts/installpython/anotherpython

Support of cases when reboostrap part exists

>>> import sys
>>> mkdir(sample_buildout, 'recipes')
>>> write(sample_buildout, 'recipes', 'setup.py',
... """
... from setuptools import setup
...
... setup(
...     name = "recipes",
...     entry_points = {'zc.buildout':[
...             'pyinstall = pyinstall:Pyinstall',
...             'pyshow = pyshow:Pyshow',
...     ]},
...     )
... """)
>>> write(sample_buildout, 'recipes', 'README.txt', " ")
>>> write(sample_buildout, 'recipes', 'pyinstall.py',
... """
... import os, zc.buildout, shutil, sys
...
... class Pyinstall:
...
...     def __init__(self, buildout, name, options):
...         self.name, self.options = name, options
...         self.destination = os.path.join(buildout['buildout'][
...             'parts-directory'], self.options.get('python', name))
...
...     def install(self):
...         for d in [self.destination, os.path.join(self.destination, 'bin')]:
...           if not os.path.exists(d):
...               os.mkdir(d)
...         python = os.path.join(self.destination, 'bin', self.name)
...         if not os.path.exists(python):
...             shutil.copy(sys.executable, python)
...         return []
...
...     update = install
... """)
>>> write(sample_buildout, 'recipes', 'pyshow.py',
... """
... import os, zc.buildout, shutil, sys
...
... class Pyshow:
...
...     def __init__(self, buildout, name, options):
...         self.name, self.options = name, options
...
...     def install(self):
...         print 'Running with:', sys.executable
...         return []
...
...     update = install
... """)
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes
... parts =
... """)
>>> print system(buildout),
Develop: '/sample-buildout/recipes'
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes
... extensions = slapos.rebootstrap
...
... parts =
...   realrun
...
... [rebootstrap]
... section =
...   installpython
... version =
...   1
...
... [installpython]
... recipe = recipes:pyinstall
...
... [realrun]
... recipe = recipes:pyshow
... """ % dict(syspython=sys.executable))
>>> import os
>>> os.mkdir('rebootstrap.1.parts')
>>> print system(buildout),
slapos.rebootstrap: Installing section 'installpython' to provide '/sample-buildout/rebootstrap.1.parts/installpython/bin/installpython' in '/sample-buildout/rebootstrap.1.parts'
slapos.rebootstrap: Rerunning buildout to install section installpython with arguments ['/sample-buildout/bin/buildout', 'buildout:parts=installpython', 'buildout:extensions=', '/sample-buildout/rebootstrap.1.parts', 'buildout:installed=.rebootstrap.1.installed.cfg'].
Develop: '/sample-buildout/recipes'
Installing installpython.
slapos.rebootstrap:
************ REBOOTSTRAP: IMPORTANT NOTICE ************
bin/buildout is being reinstalled right now, as new python:
  /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython
is available, and buildout is using another python:
  /system_python
Buildout will be restarted automatically to have this change applied.
************ REBOOTSTRAP: IMPORTANT NOTICE ************
<BLANKLINE>
Generated script '/sample-buildout/bin/buildout'.
Develop: '/sample-buildout/recipes'
Installing realrun.
Running with: /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython

Support of upgrade

>>> import sys
>>> mkdir(sample_buildout, 'recipes')
>>> write(sample_buildout, 'recipes', 'setup.py',
... """
... from setuptools import setup
...
... setup(
...     name = "recipes",
...     entry_points = {'zc.buildout':[
...             'pyinstall = pyinstall:Pyinstall',
...             'pyshow = pyshow:Pyshow',
...     ]},
...     )
... """)
>>> write(sample_buildout, 'recipes', 'README.txt', " ")
>>> write(sample_buildout, 'recipes', 'pyinstall.py',
... """
... import os, zc.buildout, shutil, sys
...
... class Pyinstall:
...
...     def __init__(self, buildout, name, options):
...         self.name, self.options = name, options
...         self.destination = os.path.join(buildout['buildout'][
...             'parts-directory'], self.options.get('python', name))
...
...     def install(self):
...         for d in [self.destination, os.path.join(self.destination, 'bin')]:
...           if not os.path.exists(d):
...               os.mkdir(d)
...         python = os.path.join(self.destination, 'bin', self.name)
...         if not os.path.exists(python):
...             shutil.copy(sys.executable, python)
...         return []
...
...     update = install
... """)
>>> write(sample_buildout, 'recipes', 'pyshow.py',
... """
... import os, zc.buildout, shutil, sys
...
... class Pyshow:
...
...     def __init__(self, buildout, name, options):
...         self.name, self.options = name, options
...
...     def install(self):
...         print 'Running with:', sys.executable
...         return []
...
...     update = install
... """)
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes
... parts =
... """)
>>> print system(buildout),
Develop: '/sample-buildout/recipes'
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes
... extensions = slapos.rebootstrap
...
... parts =
...   realrun
...
... [rebootstrap]
... section =
...   installpython
... version =
...   1
...
... [installpython]
... recipe = recipes:pyinstall
...
... [realrun]
... recipe = recipes:pyshow
... """ % dict(syspython=sys.executable))
>>> print system(buildout),
slapos.rebootstrap: Installing section 'installpython' to provide '/sample-buildout/rebootstrap.1.parts/installpython/bin/installpython' in '/sample-buildout/rebootstrap.1.parts'
slapos.rebootstrap: Rerunning buildout to install section installpython with arguments ['/sample-buildout/bin/buildout', 'buildout:parts=installpython', 'buildout:extensions=', '/sample-buildout/rebootstrap.1.parts', 'buildout:installed=.rebootstrap.1.installed.cfg'].
Creating directory '/sample-buildout/rebootstrap.1.parts'.
Develop: '/sample-buildout/recipes'
Installing installpython.
slapos.rebootstrap:
************ REBOOTSTRAP: IMPORTANT NOTICE ************
bin/buildout is being reinstalled right now, as new python:
  /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython
is available, and buildout is using another python:
  /system_python
Buildout will be restarted automatically to have this change applied.
************ REBOOTSTRAP: IMPORTANT NOTICE ************
<BLANKLINE>
Generated script '/sample-buildout/bin/buildout'.
Develop: '/sample-buildout/recipes'
Installing realrun.
Running with: /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes
... extensions = slapos.rebootstrap
...
... parts =
...   realrun
...
... [rebootstrap]
... section =
...   installpython
... version =
...   2
...
... [installpython]
... recipe = recipes:pyinstall
...
... [realrun]
... recipe = recipes:pyshow
... """ % dict(syspython=sys.executable))
>>> print system(buildout),
slapos.rebootstrap: Installing section 'installpython' to provide '/sample-buildout/rebootstrap.2.parts/installpython/bin/installpython' in '/sample-buildout/rebootstrap.2.parts'
slapos.rebootstrap: Rerunning buildout to install section installpython with arguments ['/sample-buildout/bin/buildout', 'buildout:parts=installpython', 'buildout:extensions=', '/sample-buildout/rebootstrap.2.parts', 'buildout:installed=.rebootstrap.2.installed.cfg'].
Creating directory '/sample-buildout/rebootstrap.2.parts'.
Develop: '/sample-buildout/recipes'
Installing installpython.
slapos.rebootstrap:
************ REBOOTSTRAP: IMPORTANT NOTICE ************
bin/buildout is being reinstalled right now, as new python:
  /sample_buildout/rebootstrap.2.parts/installpython/bin/installpython
is available, and buildout is using another python:
  /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython
Buildout will be restarted automatically to have this change applied.
************ REBOOTSTRAP: IMPORTANT NOTICE ************
<BLANKLINE>
Generated script '/sample-buildout/bin/buildout'.
Develop: '/sample-buildout/recipes'
Updating realrun.
Running with: /sample_buildout/rebootstrap.2.parts/installpython/bin/installpython
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... develop = recipes
... extensions = slapos.rebootstrap
...
... parts =
...   realrun
...
... [rebootstrap]
... section =
...   installpython
... version =
...   1
...
... [installpython]
... recipe = recipes:pyinstall
...
... [realrun]
... recipe = recipes:pyshow
... """ % dict(syspython=sys.executable))
>>> print system(buildout),
slapos.rebootstrap:
************ REBOOTSTRAP: IMPORTANT NOTICE ************
bin/buildout is being reinstalled right now, as new python:
  /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython
is available, and buildout is using another python:
  /sample_buildout/rebootstrap.2.parts/installpython/bin/installpython
Buildout will be restarted automatically to have this change applied.
************ REBOOTSTRAP: IMPORTANT NOTICE ************
<BLANKLINE>
Generated script '/sample-buildout/bin/buildout'.
Develop: '/sample-buildout/recipes'
Updating realrun.
Running with: /sample_buildout/rebootstrap.1.parts/installpython/bin/installpython