package.jsonのdependenciesなどから使われてるパッケージのバージョンの更新日時などを抜いてくるスクリプト

npmpackage_versions.py

#-*- coding: utf-8 -*-

import subprocess
import json
import sys
import re
from datetime import datetime


timeformat = "%Y-%m-%d"
out_timeformat = "%Y/%m/%d"
timeregex = re.compile(r" *'(.*)': '(.*)T.*Z'.*$")
homepageregex = re.compile(r".*homepage: '(.*)',?")


def main():
    if len(sys.argv) <= 1:
        print("Usage: python3 npmpackage_versions.py package.json")
        exit(1)

    with open(sys.argv[1], "r") as f:
        package_json = json.loads(f.read())
        dependencies = package_json["dependencies"]
        devDependencies = package_json["devDependencies"]
        # devDependenciesは別のファイルで欲しい、などの場合はこのあたりをいじる
        dependencies.update(devDependencies)

        with open("versions.csv", "w") as output:
            output.write("package,version,date,homepage\n")
            for package, version in dependencies.items():
                r = get_npm_version_date(package, version)
                print("%s(%s)..." % (package, version))
                if r[0]:
                    output.write("%s,%s,%s,%s\n" % r)

def get_npm_version_date(package_name, version):
    """
        @returns (package_name: String, package_version: String, date_str: String)
    """
    std_out = subprocess.check_output(
        ["npm", "info", package_name]).decode("utf-8")
    if std_out.find("npm ERR!") >= 0:
        print("%s not found, skiped." % package_name)
        return (None, None, None, None)
    if version[0] == "^":
        version = version[1:]
    homepage_line = std_out[std_out.find("homepage"):]

    times = std_out[std_out.find(
        "time:"):].split(",")
    m = homepageregex.match(homepage_line)
    homepage = ""
    if m:
        homepage = m.group(1).replace(" ", "")
    for time in times:
        m = timeregex.match(time.strip())
        if m and m.group(1) == version:
            date = datetime.strptime(m.group(2), timeformat)
            return (package_name, version, date.strftime(out_timeformat), homepage)

    return (None, None, None, None)


if __name__ == '__main__':
    main()