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#!/usr/bin/env python
# Yes, this is a Python program writing a Ruby program.
import argparse
import hashlib
import sys
import os
parser = argparse.ArgumentParser()
parser.add_argument("--url-base", default = "https://brew.cryptech.is/tarballs/")
parser.add_argument("tarball")
parser.add_argument("version")
parser.add_argument("formula", type = argparse.FileType("w"), nargs = "?", default = sys.stdout)
args = parser.parse_args()
template = '''\
# This Homebrew forumula was automatically generated by a script.
# You might not want to edit it manually.
class CryptechAlpha < Formula
desc "Software for working with Cryptech Alpha board HSM"
homepage "https://cryptech.is/"
version "{version}"
url "{url}"
sha256 "{sha256}"
# Eventually we'll want resource clauses here to pull in stuff we
# need from pypi, see brew doc for that, but skip it initially.
# We should also specify a dependency on sqlite3, and perhaps other
# packages. Skip that for now too.
# If we get really ambitous, it would be nice to have "bottled"
# (precompiled binary) versions, but that requires either a build
# farm or some kind of cross-compilation.
def install
ENV.deparallelize
system "make", "-C", "sw/pkcs11"
share.install "cryptech-alpha-firmware.tar.gz"
lib.install "sw/pkcs11/libpkcs11.dylib"
sbin.install "sw/pkcs11/p11util"
sbin.install "sw/stm32/projects/hsm/cryptech_upload"
end
end
'''
with open(args.tarball, "rb") as f:
digest = hashlib.sha256(f.read()).hexdigest()
args.formula.write(template.format(
version = args.version,
url = os.path.join(args.url_base, os.path.basename(args.tarball)),
sha256 = digest))
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