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80 lines
3.1 KiB
Python
80 lines
3.1 KiB
Python
# -*- mode: python; -*-
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# Try to keep this modules imports minimum and only
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# import python standard modules, because this module
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# should be used for finding such external modules or
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# missing dependencies.
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import sys
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import subprocess
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import re
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class MissingRequirements(Exception):
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"""Raised when when verify_requirements() detects missing requirements."""
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pass
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def verify_requirements(silent: bool = False, executable=sys.executable):
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"""Check if the modules in a pip requirements file are installed.
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This allows for a more friendly user message with guidance on how to
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resolve the missing dependencies.
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Args:
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requirements_file: path to a pip requirements file.
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silent: True if the function should print.
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Raises:
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MissingRequirements if any requirements are missing
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"""
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def verbose(*args, **kwargs):
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if not silent:
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print(*args, **kwargs)
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def raiseSuggestion(ex, pip_pkg):
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raise MissingRequirements(f"{ex}\n"
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f"Try running:\n"
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f" {executable} -m pip install {pip_pkg}") from ex
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# Import poetry. If this fails then we know the next function will fail.
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# This is so the user will have an easier time diagnosing the problem
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try:
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import poetry
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except ModuleNotFoundError as ex:
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raiseSuggestion(ex, "'poetry==1.5.1'")
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verbose("Checking required python packages...")
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try:
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poetry_dry_run_proc = subprocess.run(
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[executable, "-m", "poetry", "install", "--no-root", "--sync", "--dry-run"], check=True,
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text=True, capture_output=True, errors='backslashreplace')
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except subprocess.CalledProcessError as exc:
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print("ERROR: poetry packages verification failed.")
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print(exc.stdout)
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print(exc.stderr)
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raise MissingRequirements(
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f"Detected one or more packages are out of date. "
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f"Try running:\n"
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f" export PYTHON_KEYRING_BACKEND=keyring.backends.null.Keyring\n"
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f" python3 -m poetry install --no-root --sync")
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# String match should look like the following
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# Package operations: 2 installs, 3 updates, 0 removals, 165 skipped
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match = re.search(r"Package operations: (\d+) \w+, (\d+) \w+, (\d+) \w+, (\d+) \w+",
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poetry_dry_run_proc.stdout)
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verbose("Requirements list:")
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verbose(poetry_dry_run_proc.stdout)
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installs = int(match[1])
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updates = int(match[2])
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removals = int(match[3])
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if updates == 1 and sys.platform == 'win32' and "Updating pywin32" in poetry_dry_run_proc.stdout:
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# We have no idea why pywin32 thinks it needs to be updated
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# We could use some more investigation into this
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verbose(
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"Windows detected a single update to pywin32 which is known to be buggy. Continuing.")
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elif installs + updates + removals > 0:
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raise MissingRequirements(
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f"Detected one or more packages are out of date. "
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f"Try running:\n"
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f" export PYTHON_KEYRING_BACKEND=keyring.backends.null.Keyring\n"
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f" {executable} -m poetry install --no-root --sync")
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