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opt
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cloudlinux
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venv
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lib64
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python3.11
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site-packages
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virtualenv
/
discovery
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builtin.py
import logging import os import sys from virtualenv.info import IS_WIN from .discover import Discover from .py_info import PythonInfo from .py_spec import PythonSpec class Builtin(Discover): def __init__(self, options): super().__init__(options) self.python_spec = options.python if options.python else [sys.executable] self.app_data = options.app_data self.try_first_with = options.try_first_with @classmethod def add_parser_arguments(cls, parser): parser.add_argument( "-p", "--python", dest="python", metavar="py", type=str, action="append", default=[], help="interpreter based on what to create environment (path/identifier) " "- by default use the interpreter where the tool is installed - first found wins", ) parser.add_argument( "--try-first-with", dest="try_first_with", metavar="py_exe", type=str, action="append", default=[], help="try first these interpreters before starting the discovery", ) def run(self): for python_spec in self.python_spec: result = get_interpreter(python_spec, self.try_first_with, self.app_data, self._env) if result is not None: return result return None def __repr__(self): spec = self.python_spec[0] if len(self.python_spec) == 1 else self.python_spec return f"{self.__class__.__name__} discover of python_spec={spec!r}" def get_interpreter(key, try_first_with, app_data=None, env=None): spec = PythonSpec.from_string_spec(key) logging.info("find interpreter for spec %r", spec) proposed_paths = set() env = os.environ if env is None else env for interpreter, impl_must_match in propose_interpreters(spec, try_first_with, app_data, env): key = interpreter.system_executable, impl_must_match if key in proposed_paths: continue logging.info("proposed %s", interpreter) if interpreter.satisfies(spec, impl_must_match): logging.debug("accepted %s", interpreter) return interpreter proposed_paths.add(key) def propose_interpreters(spec, try_first_with, app_data, env=None): # 0. try with first env = os.environ if env is None else env for py_exe in try_first_with: path = os.path.abspath(py_exe) try: os.lstat(path) # Windows Store Python does not work with os.path.exists, but does for os.lstat except OSError: pass else: yield PythonInfo.from_exe(os.path.abspath(path), app_data, env=env), True # 1. if it's a path and exists if spec.path is not None: try: os.lstat(spec.path) # Windows Store Python does not work with os.path.exists, but does for os.lstat except OSError: if spec.is_abs: raise else: yield PythonInfo.from_exe(os.path.abspath(spec.path), app_data, env=env), True if spec.is_abs: return else: # 2. otherwise try with the current yield PythonInfo.current_system(app_data), True # 3. otherwise fallback to platform default logic if IS_WIN: from .windows import propose_interpreters for interpreter in propose_interpreters(spec, app_data, env): yield interpreter, True # finally just find on path, the path order matters (as the candidates are less easy to control by end user) paths = get_paths(env) tested_exes = set() for pos, path in enumerate(paths): path_str = str(path) logging.debug(LazyPathDump(pos, path_str, env)) for candidate, match in possible_specs(spec): found = check_path(candidate, path_str) if found is not None: exe = os.path.abspath(found) if exe not in tested_exes: tested_exes.add(exe) interpreter = PathPythonInfo.from_exe(exe, app_data, raise_on_error=False, env=env) if interpreter is not None: yield interpreter, match def get_paths(env): path = env.get("PATH", None) if path is None: try: path = os.confstr("CS_PATH") except (AttributeError, ValueError): path = os.defpath if not path: paths = [] else: paths = [p for p in path.split(os.pathsep) if os.path.exists(p)] return paths class LazyPathDump: def __init__(self, pos, path, env): self.pos = pos self.path = path self.env = env def __repr__(self): content = f"discover PATH[{self.pos}]={self.path}" if self.env.get("_VIRTUALENV_DEBUG"): # this is the over the board debug content += " with =>" for file_name in os.listdir(self.path): try: file_path = os.path.join(self.path, file_name) if os.path.isdir(file_path) or not os.access(file_path, os.X_OK): continue except OSError: pass content += " " content += file_name return content def check_path(candidate, path): _, ext = os.path.splitext(candidate) if sys.platform == "win32" and ext != ".exe": candidate = candidate + ".exe" if os.path.isfile(candidate): return candidate candidate = os.path.join(path, candidate) if os.path.isfile(candidate): return candidate return None def possible_specs(spec): # 4. then maybe it's something exact on PATH - if it was direct lookup implementation no longer counts yield spec.str_spec, False # 5. or from the spec we can deduce a name on path that matches yield from spec.generate_names() class PathPythonInfo(PythonInfo): """python info from path""" __all__ = [ "get_interpreter", "Builtin", "PathPythonInfo", ]
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