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261 lines
9.0 KiB
261 lines
9.0 KiB
3 years ago
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import logging
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import os
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import shlex
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import subprocess
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from typing import (
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TYPE_CHECKING,
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Any,
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Callable,
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Iterable,
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List,
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Mapping,
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Optional,
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Union,
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)
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from pip._vendor.rich.markup import escape
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from pip._internal.cli.spinners import SpinnerInterface, open_spinner
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from pip._internal.exceptions import InstallationSubprocessError
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from pip._internal.utils.logging import VERBOSE, subprocess_logger
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from pip._internal.utils.misc import HiddenText
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if TYPE_CHECKING:
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# Literal was introduced in Python 3.8.
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#
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# TODO: Remove `if TYPE_CHECKING` when dropping support for Python 3.7.
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from typing import Literal
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CommandArgs = List[Union[str, HiddenText]]
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def make_command(*args: Union[str, HiddenText, CommandArgs]) -> CommandArgs:
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"""
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Create a CommandArgs object.
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"""
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command_args: CommandArgs = []
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for arg in args:
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# Check for list instead of CommandArgs since CommandArgs is
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# only known during type-checking.
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if isinstance(arg, list):
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command_args.extend(arg)
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else:
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# Otherwise, arg is str or HiddenText.
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command_args.append(arg)
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return command_args
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def format_command_args(args: Union[List[str], CommandArgs]) -> str:
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"""
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Format command arguments for display.
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"""
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# For HiddenText arguments, display the redacted form by calling str().
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# Also, we don't apply str() to arguments that aren't HiddenText since
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# this can trigger a UnicodeDecodeError in Python 2 if the argument
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# has type unicode and includes a non-ascii character. (The type
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# checker doesn't ensure the annotations are correct in all cases.)
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return " ".join(
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shlex.quote(str(arg)) if isinstance(arg, HiddenText) else shlex.quote(arg)
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for arg in args
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)
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def reveal_command_args(args: Union[List[str], CommandArgs]) -> List[str]:
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"""
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Return the arguments in their raw, unredacted form.
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"""
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return [arg.secret if isinstance(arg, HiddenText) else arg for arg in args]
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def call_subprocess(
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cmd: Union[List[str], CommandArgs],
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show_stdout: bool = False,
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cwd: Optional[str] = None,
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on_returncode: 'Literal["raise", "warn", "ignore"]' = "raise",
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extra_ok_returncodes: Optional[Iterable[int]] = None,
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extra_environ: Optional[Mapping[str, Any]] = None,
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unset_environ: Optional[Iterable[str]] = None,
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spinner: Optional[SpinnerInterface] = None,
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log_failed_cmd: Optional[bool] = True,
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stdout_only: Optional[bool] = False,
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*,
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command_desc: str,
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) -> str:
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"""
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Args:
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show_stdout: if true, use INFO to log the subprocess's stderr and
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stdout streams. Otherwise, use DEBUG. Defaults to False.
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extra_ok_returncodes: an iterable of integer return codes that are
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acceptable, in addition to 0. Defaults to None, which means [].
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unset_environ: an iterable of environment variable names to unset
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prior to calling subprocess.Popen().
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log_failed_cmd: if false, failed commands are not logged, only raised.
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stdout_only: if true, return only stdout, else return both. When true,
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logging of both stdout and stderr occurs when the subprocess has
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terminated, else logging occurs as subprocess output is produced.
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"""
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if extra_ok_returncodes is None:
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extra_ok_returncodes = []
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if unset_environ is None:
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unset_environ = []
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# Most places in pip use show_stdout=False. What this means is--
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#
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# - We connect the child's output (combined stderr and stdout) to a
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# single pipe, which we read.
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# - We log this output to stderr at DEBUG level as it is received.
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# - If DEBUG logging isn't enabled (e.g. if --verbose logging wasn't
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# requested), then we show a spinner so the user can still see the
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# subprocess is in progress.
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# - If the subprocess exits with an error, we log the output to stderr
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# at ERROR level if it hasn't already been displayed to the console
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# (e.g. if --verbose logging wasn't enabled). This way we don't log
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# the output to the console twice.
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#
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# If show_stdout=True, then the above is still done, but with DEBUG
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# replaced by INFO.
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if show_stdout:
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# Then log the subprocess output at INFO level.
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log_subprocess = subprocess_logger.info
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used_level = logging.INFO
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else:
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# Then log the subprocess output using VERBOSE. This also ensures
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# it will be logged to the log file (aka user_log), if enabled.
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log_subprocess = subprocess_logger.verbose
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used_level = VERBOSE
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# Whether the subprocess will be visible in the console.
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showing_subprocess = subprocess_logger.getEffectiveLevel() <= used_level
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# Only use the spinner if we're not showing the subprocess output
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# and we have a spinner.
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use_spinner = not showing_subprocess and spinner is not None
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log_subprocess("Running command %s", command_desc)
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env = os.environ.copy()
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if extra_environ:
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env.update(extra_environ)
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for name in unset_environ:
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env.pop(name, None)
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try:
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proc = subprocess.Popen(
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# Convert HiddenText objects to the underlying str.
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reveal_command_args(cmd),
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT if not stdout_only else subprocess.PIPE,
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cwd=cwd,
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env=env,
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errors="backslashreplace",
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)
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except Exception as exc:
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if log_failed_cmd:
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subprocess_logger.critical(
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"Error %s while executing command %s",
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exc,
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command_desc,
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)
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raise
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all_output = []
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if not stdout_only:
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assert proc.stdout
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assert proc.stdin
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proc.stdin.close()
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# In this mode, stdout and stderr are in the same pipe.
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while True:
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line: str = proc.stdout.readline()
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if not line:
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break
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line = line.rstrip()
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all_output.append(line + "\n")
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# Show the line immediately.
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log_subprocess(line)
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# Update the spinner.
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if use_spinner:
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assert spinner
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spinner.spin()
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try:
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proc.wait()
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finally:
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if proc.stdout:
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proc.stdout.close()
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output = "".join(all_output)
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else:
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# In this mode, stdout and stderr are in different pipes.
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# We must use communicate() which is the only safe way to read both.
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out, err = proc.communicate()
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# log line by line to preserve pip log indenting
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for out_line in out.splitlines():
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log_subprocess(out_line)
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all_output.append(out)
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for err_line in err.splitlines():
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log_subprocess(err_line)
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all_output.append(err)
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output = out
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proc_had_error = proc.returncode and proc.returncode not in extra_ok_returncodes
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if use_spinner:
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assert spinner
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if proc_had_error:
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spinner.finish("error")
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else:
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spinner.finish("done")
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if proc_had_error:
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if on_returncode == "raise":
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error = InstallationSubprocessError(
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command_description=command_desc,
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exit_code=proc.returncode,
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output_lines=all_output if not showing_subprocess else None,
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)
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if log_failed_cmd:
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subprocess_logger.error("[present-diagnostic] %s", error)
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subprocess_logger.verbose(
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"[bold magenta]full command[/]: [blue]%s[/]",
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escape(format_command_args(cmd)),
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extra={"markup": True},
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)
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subprocess_logger.verbose(
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"[bold magenta]cwd[/]: %s",
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escape(cwd or "[inherit]"),
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extra={"markup": True},
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)
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raise error
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elif on_returncode == "warn":
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subprocess_logger.warning(
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'Command "%s" had error code %s in %s',
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command_desc,
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proc.returncode,
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cwd,
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)
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elif on_returncode == "ignore":
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pass
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else:
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raise ValueError(f"Invalid value: on_returncode={on_returncode!r}")
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return output
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def runner_with_spinner_message(message: str) -> Callable[..., None]:
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"""Provide a subprocess_runner that shows a spinner message.
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Intended for use with for pep517's Pep517HookCaller. Thus, the runner has
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an API that matches what's expected by Pep517HookCaller.subprocess_runner.
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"""
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def runner(
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cmd: List[str],
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cwd: Optional[str] = None,
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extra_environ: Optional[Mapping[str, Any]] = None,
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) -> None:
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with open_spinner(message) as spinner:
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call_subprocess(
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cmd,
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command_desc=message,
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cwd=cwd,
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extra_environ=extra_environ,
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spinner=spinner,
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)
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return runner
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