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"""
If setuptools is not already installed in the environment, it's not possible
to invoke setuptools' own commands. This routine will bootstrap this local
environment by creating a minimal egg-info directory and then invoking the
egg-info command to flesh out the egg-info directory.
"""
import os
import sys
import textwrap
import subprocess
minimal_egg_info = textwrap.dedent("""
[distutils.commands]
egg_info = setuptools.command.egg_info:egg_info
[distutils.setup_keywords]
include_package_data = setuptools.dist:assert_bool
install_requires = setuptools.dist:check_requirements
extras_require = setuptools.dist:check_extras
entry_points = setuptools.dist:check_entry_points
[egg_info.writers]
dependency_links.txt = setuptools.command.egg_info:overwrite_arg
entry_points.txt = setuptools.command.egg_info:write_entries
requires.txt = setuptools.command.egg_info:write_requirements
""")
def ensure_egg_info():
if os.path.exists('setuptools.egg-info'):
return
print("adding minimal entry_points")
build_egg_info()
def build_egg_info():
"""
Build a minimal egg-info, enough to invoke egg_info
"""
os.mkdir('setuptools.egg-info')
with open('setuptools.egg-info/entry_points.txt', 'w') as ep:
ep.write(minimal_egg_info)
def run_egg_info():
cmd = [sys.executable, 'setup.py', 'egg_info']
print("Regenerating egg_info")
subprocess.check_call(cmd)
print("...and again.")
subprocess.check_call(cmd)
if __name__ == '__main__':
ensure_egg_info()
run_egg_info()
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