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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", required = True)
parser.add_argument("--package", required = True)
parser.add_argument("--version", required = True)
parser.add_argument("--formula", type = argparse.FileType("w"), nargs = "?", default = sys.stdout)
parser.add_argument("--conflicts", nargs = "*")
args = parser.parse_args()
template = '''\
# This Homebrew forumula was automatically generated by a script.
# You might not want to edit it manually.
#
# Installation is a bit complex due to the way Homebrew handles Python
# library dependencies and due to our stuff being a mixture of Python
# and C. It's also painfully slow, because we're not using bottles,
# due to lack of a MacOS build farm. Sorry.
#
# Per Homebrew expectations, we install copies of external Python
# libraries ("resources") in our own private library directory, using
# Homebrew's hack to run our executable Python scripts with PYTHONPATH
# pointing to our private library directory. Our own Python library
# code, however, is what Homebrew considers "bindings", so we install
# those where user scripts as well as our own can find them.
#
# We have to build our own software before installing our Python code,
# because at least one of the Python modules we install
# (cryptech.py11.attribute_map) is generated during the build.
#
# Reference for all the Python voodoo:
#
# https://github.com/Homebrew/brew/blob/master/share/doc/homebrew/Python-for-Formula-Authors.md
class {classname} < Formula
desc "Software for working with Cryptech Alpha board HSM"
homepage "https://cryptech.is/"
version "{version}"
url "{url}"
sha256 "{sha256}"
{conflicts}
resource "pyserial" do
url "https://pypi.python.org/packages/3c/d8/a9fa247ca60b02b3bebbd61766b4f321393b57b13c53b18f6f62cf172c08/pyserial-3.1.1.tar.gz"
sha256 "d657051249ce3cbd0446bcfb2be07a435e1029da4d63f53ed9b4cdde7373364c"
end
resource "PyYAML" do
url "http://pyyaml.org/download/pyyaml/PyYAML-3.11.tar.gz"
sha256 "c36c938a872e5ff494938b33b14aaa156cb439ec67548fcab3535bb78b0846e8"
end
resource "tornado" do
url "https://files.pythonhosted.org/packages/source/t/tornado/tornado-4.4.3.tar.gz"
sha256 "f267acc96d5cf3df0fd8a7bfb5a91c2eb4ec81d5962d1a7386ceb34c655634a8"
end
resource "singledispatch" do
url "https://pypi.python.org/packages/source/s/singledispatch/singledispatch-3.4.0.3.tar.gz"
sha256 "5b06af87df13818d14f08a028e42f566640aef80805c3b50c5056b086e3c2b9c"
end
resource "backports_abc" do
url "https://files.pythonhosted.org/packages/source/b/backports_abc/backports_abc-0.5.tar.gz"
sha256 "033be54514a03e255df75c5aee8f9e672f663f93abb723444caec8fe43437bde"
end
def install
ENV.prepend_create_path "PYTHONPATH", libexec/"vendor/lib/python2.7/site-packages"
resources.each do |r|
r.stage do
system "python", *Language::Python.setup_install_args(libexec/"vendor")
end
end
ohai "Building PKCS #11 code (including crypto and bignum libraries) from source, this is slow, please be patient..."
ENV.deparallelize
system "make", "-C", "sw/pkcs11"
system "python", *Language::Python.setup_install_args(prefix)
bin.env_script_all_files(libexec/"bin", :PYTHONPATH => ENV["PYTHONPATH"])
share.install "cryptech-alpha-firmware.tar.gz"
lib.install "sw/pkcs11/libcryptech-pkcs11.dylib"
end
end
'''
with open(args.tarball, "rb") as f:
digest = hashlib.sha256(f.read()).hexdigest()
classname = "".join(word.capitalize() for word in args.package.split("-"))
conflicts = "".join(" conflicts_with \"{}\", :because => \"HSM firmware and PKCS #11 library must match each other\"\n".format(i)
for i in args.conflicts)
url = os.path.join(args.url_base, os.path.basename(args.tarball))
args.formula.write(template.format(
version = args.version,
url = url,
sha256 = digest,
classname = classname,
conflicts = conflicts))
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