#!/usr/bin/env python3 import os import sys import hashlib import shutil import re import collections import urllib.parse import multiprocessing import pathlib from configparser import ConfigParser import requests def load_config(): """ Load configuarion from pack and local configuration files Fill in reasonable defaults where applicable. """ config_p = ConfigParser() config_p.read(["pack.ini", "local-config.ini"]) config = config_p._sections config["pack"]["sanitized_name"] = sanitize_text(config["pack"]["name"]) if "location" not in config["pack"]: config['pack']['location'] = os.path.join(find_minecraft_directory(), config['pack']['sanitized_name']) if "whitelist" not in config["pack"]: config["pack"]["whitelist"] = [] else: config["pack"]["whitelist"] = config["pack"]["whitelist"].split(",") config["pack"]["game_version"] = game_version_from_string(config["pack"]["game_version"]) # return the whole config file, pack configuration and modlist return config def find_minecraft_directory(): """ Find the location of the user's .minecraft folder based on their operating system. :returns: the absolute path to the .minecraft directory """ if sys.platform == "linux": return os.path.join(os.path.expanduser('~'), ".minecraft") elif sys.platform == "win32": return os.path.join(os.environ["APPDATA"], ".minecraft") elif sys.platform == "darwin": return os.path.join(os.path.expanduser('~'), "Library", "Application Support", "minecraft") else: raise RuntimeError(f"Unsupported operating system `{sys.platform}`. Please define a location for the pack in your `local-config.ini` file") def find_jre(): """ Find a usable install of Java, either from a user-installed JRE or from the Minecraft Launcher's integrated JRE. :return: the absolute path of a working Java executable """ if shutil.which("java") is not None: return shutil.which("java") if sys.platform == 'win32': # We can try and use the Minecraft Launcher's integrated JRE on Windows if os.path.exists("C:\\Program Files (x86)\\Minecraft Launcher\\runtime\\jre-x64\\java.exe"): return "C:\\Program Files (x86)\\Minecraft Launcher\\runtime\\jre-x64\\java.exe" raise RuntimeError("Unable to detect an installed JRE. Please install Java in order to use modpackman.") # take a string and only keep filename-friendly parts def sanitize_text(text): sanitized = "" replacement_map = {" ": "-"} for char in text: if char.isalnum(): sanitized += char.lower() elif char in replacement_map: sanitized += replacement_map[char] return sanitized def read_file(fil): """ Given a filename, read its contents in as a list of tuples. This function strips out comment lines and whitespaces. """ strings = [] with open(fil) as f: for line in f: string = line.strip().split() if len(line) > 1 and line[0] != '#': # run strip on each element string = tuple(map(lambda x: x.strip(), string)) strings.append(string) return strings def get_version_from_file(fil): with open(fil) as f: for line in f: if line.strip().split()[0] == "#VERSION": return int(line.strip().split()[1]) return 0 def game_version_from_string(string): if string is not None: try: return tuple(int(x) for x in string.split('.')) except: pass return (2, 0, 0) def threaded_find_url(homepage_url, game_version): """ Helper function that finds a single mod URL based on the homepage. """ if 'curseforge' in homepage_url: ffx = firefox() final_url = find_cdn(ffx, homepage_url, game_version) ffx.close() else: final_url = requests.get(homepage_url).url return final_url def find_updated_urls(forge_urls, game_version, threads=20): """ Given a list of mod homepage URLs, find all of their direct download links in parallel. """ # First, check that we can successfully open a Firefox instance in the main thread. # This provides us with a much nicer error message and quicker feedback. f = firefox() f.close() with multiprocessing.Pool(threads) as pool: # No progress indicator possible # return pool.map(threaded_find_url, forge_urls) # Much longer, but allows us to do a nice progress indicator result_futures = [] for url in forge_urls: result_futures.append(pool.apply_async(threaded_find_url, (url, game_version))) results = [] for i,f in enumerate(result_futures): results.append(f.get()) print(f'\r{i+1}/{len(result_futures)} URLs updated ({round((i+1)/len(result_futures)*100)}%)', end='') print() return results def threaded_calc_sha1(direct_url): """ Helper function that downloads and calculates a single SHA1 hash from a direct download URL. """ resp = requests.get(direct_url) hsh = hashlib.sha1(resp.content).hexdigest() return hsh def find_checksums(direct_urls, threads=8): """ Given a list of direct download URLs, download them all and calculate the SHA1 checksum of the file at that location. """ with multiprocessing.Pool(threads) as pool: # Much longer, but allows us to do a nice progress indicator result_futures = [] for url in direct_urls: result_futures.append(pool.apply_async(threaded_calc_sha1, (url,))) results = [] for i,f in enumerate(result_futures): results.append(f.get()) print(f'\r{i+1}/{len(result_futures)} checksums calculated ({round((i+1)/len(result_futures)*100)}%)', end='') print() return results def find_cdn(ffx, url, version): """ Given a mod home URL, finds the most up-to-date mod version compatible with the given game version. Returns the direct Forge CDN download URL """ try: # This goes to the "all files" page, where we get a table view of all ffx.get(url + '/files/all') mod_versions = ffx.find_elements_by_class_name("listing")[0].find_elements_by_xpath("tbody/tr") # extract the table of files from the page row_info = collections.namedtuple("row_info", ["type", "filename", "cdn_id", "game_version"]) # create a custom tuple because data rows = [] for version_entry in mod_versions: # parse out the four fields that we use entry_cells = version_entry.find_elements_by_tag_name("td") release_type = entry_cells[0].text # Note that this is NOT the final filename - this is just the "release name". filename = urllib.parse.quote(entry_cells[1].find_elements_by_tag_name("a")[0].text) try: game_version = tuple([int(x) for x in entry_cells[4].find_element_by_class_name("mr-2").text.split(".")]) # get game version and convert to tuple except: game_version = (0, 0, 0) cdn_id = entry_cells[1].find_element_by_tag_name("a").get_property("href").split("/")[-1] #TODO make this configurable if 'fabric' not in filename.lower() or 'forge' in filename.lower(): rows.append(row_info(release_type, filename, cdn_id, game_version)) rows.sort(key=lambda x: x.game_version, reverse=True) best_row = next(x for x in rows if x.game_version <= version) # We need to find the real, ForgeCDN compatible filename now by going to the file page. ffx.get(f'{url}/files/{best_row.cdn_id}') # This will probably break in the future filename = ffx.find_elements_by_xpath("html/body/div/main/div/div/section/div/div/div/section/section/article/div/div/span")[1].text # URL escape the filename! filename = urllib.parse.quote(filename) # ForgeCDN requires that the leading zeroes are stripped from each portion of the CDN ID, hence the int() cast. return f'https://media.forgecdn.net/files/{int(best_row.cdn_id[:4])}/{int(best_row.cdn_id[4:])}/{filename}' except: # import traceback; traceback.print_exc() return None def firefox(): """ Start a headless Firefox instance and return the Selenium refrence to it. """ #print("Starting Selenium...") try: from selenium.webdriver import Firefox from selenium.webdriver.firefox.options import Options except: print("Applying updates requires the `selenium` package") exit(0) options = Options() options.add_argument('-headless') options.add_argument('--window-size 1920,1080') #for ~~cursed~~ windows people, put geckodriver in this folder if(os.path.exists("./geckodriver.exe")): return Firefox(executable_path='./geckodriver') return Firefox() # Configuration is automatically loaded from pack.ini and local-config.ini, # and made accessible here as a global config = load_config()