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#!/usr/bin/env nix-shell
#!nix-shell -p nix -p python3 -p git -i python
# USAGE - just run the script: ./update.py
# When editing this file, make also sure it passes the mypy typecheck
# and is formatted with black.
import fileinput
import json
import re
import subprocess
import tempfile
import urllib.request
from datetime import datetime
from pathlib import Path
from typing import Dict
SCRIPT_DIR = Path(__file__).parent.resolve()
def sh(*args: str) -> str:
out = subprocess.check_output(list(args))
return out.strip().decode("utf-8")
def prefetch_github(owner: str, repo: str, ref: str) -> str:
return sh(
"nix-prefetch-url",
"--unpack",
f"https://github.com/{owner}/{repo}/archive/{ref}.tar.gz",
)
def get_radare2_rev() -> str:
url = "https://api.github.com/repos/radare/radare2/releases/latest"
with urllib.request.urlopen(url) as response:
release = json.load(response) # type: ignore
return release["tag_name"]
def get_cutter_version() -> str:
version_expr = """
(with import <nixpkgs> {}; lib.getVersion (qt5.callPackage <radare2/cutter.nix> {}))
"""
return sh("nix", "eval", "--raw", version_expr.strip(), "-I", "radare2={0}".format(SCRIPT_DIR))
def get_r2_cutter_rev() -> str:
version = get_cutter_version()
url = f"https://api.github.com/repos/radareorg/cutter/contents?ref=v{version}"
with urllib.request.urlopen(url) as response:
data = json.load(response) # type: ignore
for entry in data:
if entry["name"] == "radare2":
return entry["sha"]
raise Exception("no radare2 submodule found in github.com/radareorg/cutter")
def git(dirname: str, *args: str) -> str:
return sh("git", "-C", dirname, *args)
def get_repo_info(dirname: str, rev: str) -> Dict[str, str]:
sha256 = prefetch_github("radare", "radare2", rev)
cs_ver = None
with open(Path(dirname).joinpath("shlr", "Makefile")) as makefile:
for l in makefile:
match = re.match("CS_VER=(\S+)", l)
if match:
cs_ver = match.group(1)
assert cs_ver is not None
cs_sha256 = prefetch_github("aquynh", "capstone", cs_ver)
return dict(
rev=rev,
sha256=sha256,
version_commit=git(dirname, "rev-list", "--all", "--count"),
gittap=git(dirname, "describe", "--tags", "--match", "[0-9]*"),
gittip=git(dirname, "rev-parse", "HEAD"),
cs_ver=cs_ver,
cs_sha256=cs_sha256,
)
def write_package_expr(version: str, info: Dict[str, str]) -> str:
return f"""generic {{
version_commit = "{info["version_commit"]}";
gittap = "{info["gittap"]}";
gittip = "{info["gittip"]}";
rev = "{info["rev"]}";
version = "{version}";
sha256 = "{info["sha256"]}";
cs_ver = "{info["cs_ver"]}";
cs_sha256 = "{info["cs_sha256"]}";
}}"""
def main() -> None:
radare2_rev = get_radare2_rev()
r2_cutter_rev = get_r2_cutter_rev()
with tempfile.TemporaryDirectory() as dirname:
git(
dirname,
"clone",
"--branch",
radare2_rev,
"https://github.com/radare/radare2",
".",
)
nix_file = str(SCRIPT_DIR.joinpath("default.nix"))
radare2_info = get_repo_info(dirname, radare2_rev)
git(dirname, "checkout", r2_cutter_rev)
timestamp = git(dirname, "log", "-n1", "--format=%at")
r2_cutter_version = datetime.fromtimestamp(int(timestamp)).strftime("%Y-%m-%d")
r2_cutter_info = get_repo_info(dirname, r2_cutter_rev)
in_block = False
with fileinput.FileInput(nix_file, inplace=True) as f:
for l in f:
if "#<generated>" in l:
in_block = True
print(
f""" #<generated>
# DO NOT EDIT! Automatically generated by ./update.py
radare2 = {write_package_expr(radare2_rev, radare2_info)};
r2-for-cutter = {write_package_expr(r2_cutter_version, r2_cutter_info)};
#</generated>"""
)
elif "#</generated>" in l:
in_block = False
elif not in_block:
print(l, end="")
if __name__ == "__main__":
main()
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