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# Copyright (c) Microsoft Corporation. All rights reserved.

# Licensed under the MIT License.

import argparse

import json

import os

import pathlib

import sys

from typing import Dict, List, Optional, Sequence, Tuple, Union

LIB_ROOT = pathlib.Path(__file__).parent / "lib" / "python"

sys.path.insert(0, os.fspath(LIB_ROOT))

import tomli

from importlib_metadata import metadata

from packaging.requirements import Requirement

DEFAULT_SEVERITY = "3" # 'Hint'

try:

SEVERITY = int(os.getenv("VSCODE_MISSING_PGK_SEVERITY", DEFAULT_SEVERITY))

except ValueError:

SEVERITY = int(DEFAULT_SEVERITY)

def parse_args(argv: Optional[Sequence[str]] = None):

if argv is None:

argv = sys.argv[1:]

parser = argparse.ArgumentParser(

description="Check for installed packages against requirements"

)

parser.add_argument("FILEPATH", type=str, help="Path to requirements.[txt, in]")

return parser.parse_args(argv)

def parse_requirements(line: str) -> Optional[Requirement]:

try:

req = Requirement(line.strip("\\"))

if req.marker is None:

return req

elif req.marker.evaluate():

return req

except Exception:

pass

return None

def process_requirements(req_file: pathlib.Path) -> List[Dict[str, Union[str, int]]]:

diagnostics = []

for n, line in enumerate(req_file.read_text(encoding="utf-8").splitlines()):

if line.startswith(("#", "-", " ")) or line == "":

continue

req = parse_requirements(line)

if req:

try:

# Check if package is installed

metadata(req.name)

except Exception:

diagnostics.append(

{

"line": n,

"character": 0,

"endLine": n,

"endCharacter": len(req.name),

"package": req.name,

"code": "not-installed",

"severity": SEVERITY,

}

)

return diagnostics

def get_pos(lines: List[str], text: str) -> Tuple[int, int, int, int]:

for n, line in enumerate(lines):

index = line.find(text)

if index >= 0:

return n, index, n, index + len(text)

return (0, 0, 0, 0)

def process_pyproject(req_file: pathlib.Path) -> List[Dict[str, Union[str, int]]]:

diagnostics = []

try:

raw_text = req_file.read_text(encoding="utf-8")

pyproject = tomli.loads(raw_text)

except Exception:

return diagnostics

lines = raw_text.splitlines()

reqs = pyproject.get("project", {}).get("dependencies", [])

for raw_req in reqs:

req = parse_requirements(raw_req)

n, start, _, end = get_pos(lines, raw_req)

if req:

try:

# Check if package is installed

metadata(req.name)

except Exception:

diagnostics.append(

{

"line": n,

"character": start,

"endLine": n,

"endCharacter": end,

"package": req.name,

"code": "not-installed",

"severity": SEVERITY,

}

)

return diagnostics

def get_diagnostics(req_file: pathlib.Path) -> List[Dict[str, Union[str, int]]]:

diagnostics = []

if not req_file.exists():

return diagnostics

if req_file.name == "pyproject.toml":

diagnostics = process_pyproject(req_file)

else:

diagnostics = process_requirements(req_file)

return diagnostics

def main():

args = parse_args()

diagnostics = get_diagnostics(pathlib.Path(args.FILEPATH))

print(json.dumps(diagnostics, ensure_ascii=False))

if __name__ == "__main__":

main()