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lmarccom
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python3.9
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via_global_ref
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python2
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Editing: python2.py
import abc import json import os from pathlib import Path from virtualenv.create.describe import Python2Supports from virtualenv.create.via_global_ref.builtin.ref import PathRefToDest from virtualenv.info import IS_ZIPAPP from virtualenv.util.zipapp import read as read_from_zipapp from ..via_global_self_do import ViaGlobalRefVirtualenvBuiltin HERE = Path(os.path.abspath(__file__)).parent class Python2(ViaGlobalRefVirtualenvBuiltin, Python2Supports, metaclass=abc.ABCMeta): def create(self): """Perform operations needed to make the created environment work on Python 2""" super().create() # install a patched site-package, the default Python 2 site.py is not smart enough to understand pyvenv.cfg, # so we inject a small shim that can do this, the location of this depends where it's on host sys_std_plat = Path(self.interpreter.system_stdlib_platform) site_py_in = ( self.stdlib_platform if ((sys_std_plat / "site.py").exists() or (sys_std_plat / "site.pyc").exists()) else self.stdlib ) site_py = site_py_in / "site.py" custom_site = get_custom_site() if IS_ZIPAPP: custom_site_text = read_from_zipapp(custom_site) else: custom_site_text = custom_site.read_text(encoding="utf-8") expected = json.dumps([os.path.relpath(str(i), str(site_py)) for i in self.libs]) custom_site_text = custom_site_text.replace("___EXPECTED_SITE_PACKAGES___", expected) reload_code = os.linesep.join(f" {i}" for i in self.reload_code.splitlines()).lstrip() custom_site_text = custom_site_text.replace("# ___RELOAD_CODE___", reload_code) skip_rewrite = os.linesep.join(f" {i}" for i in self.skip_rewrite.splitlines()).lstrip() custom_site_text = custom_site_text.replace("# ___SKIP_REWRITE____", skip_rewrite) site_py.write_text(custom_site_text, encoding="utf-8") @property def reload_code(self): return 'reload(sys.modules["site"]) # noqa # call system site.py to setup import libraries' @property def skip_rewrite(self): return "" @classmethod def sources(cls, interpreter): yield from super().sources(interpreter) # install files needed to run site.py, either from stdlib or stdlib_platform, at least pyc, but both if exists # if neither exists return the module file to trigger failure mappings, needs_py_module = ( cls.mappings(interpreter), cls.needs_stdlib_py_module(), ) for req in cls.modules(): module_file, to_module, module_exists = cls.from_stdlib(mappings, f"{req}.py") compiled_file, to_compiled, compiled_exists = cls.from_stdlib(mappings, f"{req}.pyc") if needs_py_module or module_exists or not compiled_exists: yield PathRefToDest(module_file, dest=to_module) if compiled_exists: yield PathRefToDest(compiled_file, dest=to_compiled) @staticmethod def from_stdlib(mappings, name): for from_std, to_std in mappings: src = from_std / name if src.exists(): return src, to_std, True # if not exists, fallback to first in list return mappings[0][0] / name, mappings[0][1], False @classmethod def mappings(cls, interpreter): mappings = [(Path(interpreter.system_stdlib_platform), cls.to_stdlib_platform)] if interpreter.system_stdlib_platform != interpreter.system_stdlib: mappings.append((Path(interpreter.system_stdlib), cls.to_stdlib)) return mappings def to_stdlib(self, src): return self.stdlib / src.name def to_stdlib_platform(self, src): return self.stdlib_platform / src.name @classmethod def needs_stdlib_py_module(cls): raise NotImplementedError @classmethod def modules(cls): return [] def get_custom_site(): return HERE / "site.py"
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