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from collections import deque
from multiprocessing import Pool
import json
import os
import zipfile
from datetime import datetime
import requests
from meta.common import (
upstream_path,
ensure_upstream_dir,
transform_maven_key,
default_session,
)
from meta.common.fabric import (
JARS_DIR,
INSTALLER_INFO_DIR,
META_DIR,
DATETIME_FORMAT_HTTP,
)
from meta.model.fabric import FabricJarInfo
UPSTREAM_DIR = upstream_path()
ensure_upstream_dir(JARS_DIR)
ensure_upstream_dir(INSTALLER_INFO_DIR)
ensure_upstream_dir(META_DIR)
sess = default_session()
def get_maven_url(maven_key, server, ext):
parts = maven_key.split(":", 3)
maven_ver_url = (
server + parts[0].replace(".", "/") + "/" + parts[1] + "/" + parts[2] + "/"
)
maven_url = maven_ver_url + parts[1] + "-" + parts[2] + ext
return maven_url
def get_json_file(path, url):
with open(path, "w", encoding="utf-8") as f:
r = sess.get(url)
r.raise_for_status()
version_json = r.json()
json.dump(version_json, f, sort_keys=True, indent=4)
return version_json
def head_file(url):
r = sess.head(url)
r.raise_for_status()
return r.headers
def get_binary_file(path, url):
r = sess.get(url)
r.raise_for_status()
with open(path, "wb") as f:
for chunk in r.iter_content(chunk_size=128):
f.write(chunk)
def compute_jar_file(path, url):
# These two approaches should result in the same metadata, except for the timestamp which might be a few minutes
# off for the fallback method
try:
# Let's not download a Jar file if we don't need to.
headers = head_file(url)
tstamp = datetime.strptime(headers["Last-Modified"], DATETIME_FORMAT_HTTP)
except requests.HTTPError:
# Just in case something changes in the future
print(f"Falling back to downloading jar for {url}")
jar_path = path + ".jar"
get_binary_file(jar_path, url)
tstamp = datetime.fromtimestamp(0)
with zipfile.ZipFile(jar_path) as jar:
allinfo = jar.infolist()
for info in allinfo:
tstamp_new = datetime(*info.date_time)
if tstamp_new > tstamp:
tstamp = tstamp_new
data = FabricJarInfo(release_time=tstamp)
data.write(path + ".json")
def compute_jar_file_concurrent(it):
print(f"Processing {it['version']} ")
jar_maven_url = get_maven_url(it["maven"], "https://maven.fabricmc.net/", ".jar")
compute_jar_file(
os.path.join(UPSTREAM_DIR, JARS_DIR, transform_maven_key(it["maven"])),
jar_maven_url,
)
print(f"Processing {it['version']} Done")
def get_json_file_concurrent(it):
print(f"Downloading JAR info for loader {it['version']} ")
maven_url = get_maven_url(it["maven"], "https://maven.fabricmc.net/", ".json")
get_json_file(
os.path.join(UPSTREAM_DIR, INSTALLER_INFO_DIR, f"{it['version']}.json"),
maven_url,
)
print(f"Downloading JAR info for loader {it['version']} Done")
def main():
# get the version list for each component we are interested in
for component in ["intermediary", "loader"]:
index = get_json_file(
os.path.join(UPSTREAM_DIR, META_DIR, f"{component}.json"),
"https://meta.fabricmc.net/v2/versions/" + component,
)
with Pool(None) as pool:
deque(pool.imap_unordered(compute_jar_file_concurrent, index, 32), 0)
# for each loader, download installer JSON file from maven
with open(
os.path.join(UPSTREAM_DIR, META_DIR, "loader.json"), "r", encoding="utf-8"
) as loaderVersionIndexFile:
loader_version_index = json.load(loaderVersionIndexFile)
with Pool(None) as pool:
deque(
pool.imap_unordered(get_json_file_concurrent, loader_version_index, 32),
0,
)
if __name__ == "__main__":
main()
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