def __init__(
self,
*,
package_details: str,
) -> None:
super(InstallationSubprocessError, self).__init__(
message="Encountered error while generating package metadata.",
context=escape(package_details),
hint_stmt="See above for details.",
note_stmt=
"This is an issue with the package mentioned above, not pip.",
)
def call_subprocess(
cmd: Union[List[str], CommandArgs],
show_stdout: bool = False,
cwd: Optional[str] = None,
on_returncode: 'Literal["raise", "warn", "ignore"]' = "raise",
extra_ok_returncodes: Optional[Iterable[int]] = None,
extra_environ: Optional[Mapping[str, Any]] = None,
unset_environ: Optional[Iterable[str]] = None,
spinner: Optional[SpinnerInterface] = None,
log_failed_cmd: Optional[bool] = True,
stdout_only: Optional[bool] = False,
*,
command_desc: str,
) -> str:
"""
Args:
show_stdout: if true, use INFO to log the subprocess's stderr and
stdout streams. Otherwise, use DEBUG. Defaults to False.
extra_ok_returncodes: an iterable of integer return codes that are
acceptable, in addition to 0. Defaults to None, which means [].
unset_environ: an iterable of environment variable names to unset
prior to calling subprocess.Popen().
log_failed_cmd: if false, failed commands are not logged, only raised.
stdout_only: if true, return only stdout, else return both. When true,
logging of both stdout and stderr occurs when the subprocess has
terminated, else logging occurs as subprocess output is produced.
"""
if extra_ok_returncodes is None:
extra_ok_returncodes = []
if unset_environ is None:
unset_environ = []
# Most places in pip use show_stdout=False. What this means is--
#
# - We connect the child's output (combined stderr and stdout) to a
# single pipe, which we read.
# - We log this output to stderr at DEBUG level as it is received.
# - If DEBUG logging isn't enabled (e.g. if --verbose logging wasn't
# requested), then we show a spinner so the user can still see the
# subprocess is in progress.
# - If the subprocess exits with an error, we log the output to stderr
# at ERROR level if it hasn't already been displayed to the console
# (e.g. if --verbose logging wasn't enabled). This way we don't log
# the output to the console twice.
#
# If show_stdout=True, then the above is still done, but with DEBUG
# replaced by INFO.
if show_stdout:
# Then log the subprocess output at INFO level.
log_subprocess: Callable[..., None] = subprocess_logger.info
used_level = logging.INFO
else:
# Then log the subprocess output using VERBOSE. This also ensures
# it will be logged to the log file (aka user_log), if enabled.
log_subprocess = subprocess_logger.verbose
used_level = VERBOSE
# Whether the subprocess will be visible in the console.
showing_subprocess = subprocess_logger.getEffectiveLevel() <= used_level
# Only use the spinner if we're not showing the subprocess output
# and we have a spinner.
use_spinner = not showing_subprocess and spinner is not None
log_subprocess("Running command %s", command_desc)
env = os.environ.copy()
if extra_environ:
env.update(extra_environ)
for name in unset_environ:
env.pop(name, None)
try:
proc = subprocess.Popen(
# Convert HiddenText objects to the underlying str.
reveal_command_args(cmd),
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT if not stdout_only else subprocess.PIPE,
cwd=cwd,
env=env,
errors="backslashreplace",
)
except Exception as exc:
if log_failed_cmd:
subprocess_logger.critical(
"Error %s while executing command %s",
exc,
command_desc,
)
raise
all_output = []
if not stdout_only:
assert proc.stdout
assert proc.stdin
proc.stdin.close()
# In this mode, stdout and stderr are in the same pipe.
while True:
line: str = proc.stdout.readline()
if not line:
break
line = line.rstrip()
all_output.append(line + "\n")
# Show the line immediately.
log_subprocess(line)
# Update the spinner.
if use_spinner:
assert spinner
spinner.spin()
try:
proc.wait()
finally:
if proc.stdout:
proc.stdout.close()
output = "".join(all_output)
else:
# In this mode, stdout and stderr are in different pipes.
# We must use communicate() which is the only safe way to read both.
out, err = proc.communicate()
# log line by line to preserve pip log indenting
for out_line in out.splitlines():
log_subprocess(out_line)
all_output.append(out)
for err_line in err.splitlines():
log_subprocess(err_line)
all_output.append(err)
output = out
proc_had_error = proc.returncode and proc.returncode not in extra_ok_returncodes
if use_spinner:
assert spinner
if proc_had_error:
spinner.finish("error")
else:
spinner.finish("done")
if proc_had_error:
if on_returncode == "raise":
error = InstallationSubprocessError(
command_description=command_desc,
exit_code=proc.returncode,
output_lines=all_output if not showing_subprocess else None,
)
if log_failed_cmd:
subprocess_logger.error("[present-rich] %s", error)
subprocess_logger.verbose(
"[bold magenta]full command[/]: [blue]%s[/]",
escape(format_command_args(cmd)),
extra={"markup": True},
)
subprocess_logger.verbose(
"[bold magenta]cwd[/]: %s",
escape(cwd or "[inherit]"),
extra={"markup": True},
)
raise error
elif on_returncode == "warn":
subprocess_logger.warning(
'Command "%s" had error code %s in %s',
command_desc,
proc.returncode,
cwd,
)
elif on_returncode == "ignore":
pass
else:
raise ValueError(f"Invalid value: on_returncode={on_returncode!r}")
return output