mmgen-wallet/setup.py

#!/usr/bin/env python3
#
# mmgen = Multi-Mode GENerator, a command-line cryptocurrency wallet
# Copyright (C)2013-2023 The MMGen Project <mmgen@tuta.io>
# Licensed under the GNU General Public License, Version 3:
#   https://www.gnu.org/licenses
# Public project repositories:
#   https://github.com/mmgen/mmgen
#   https://gitlab.com/mmgen/mmgen

import os,platform
from pathlib import Path
from subprocess import run,PIPE
from setuptools import setup,Extension
from setuptools.command.build_ext import build_ext

def build_libsecp256k1():

	root = Path().resolve().anchor
	installed_lib_file = Path(root, 'msys64', 'ucrt64', 'lib', 'libsecp256k1.dll.a')

	if installed_lib_file.exists():
		return

	# fix broken aclocal path:
	os.environ['ACLOCAL_PATH'] = '/C/msys64/ucrt64/share/aclocal:/C/msys64/usr/share/aclocal'

	if not src_path.exists():
		cache_path.mkdir(parents=True)
		print('\nCloning libsecp256k1')
		run(['git','clone','https://github.com/bitcoin-core/secp256k1.git'],check=True,cwd=cache_path)

	if not lib_file.exists():
		print(f'\nBuilding libsecp256k1 (cwd={str(src_path)})')
		cmds = (
			['sh','./autogen.sh'],
			['sh','./configure','CFLAGS=-g -O2 -fPIC','--disable-dependency-tracking'],
			['mingw32-make','MAKE=mingw32-make'])
		for cmd in cmds:
			print('Executing {}'.format(' '.join(cmd)))
			run(cmd,check=True,cwd=src_path)

	if not installed_lib_file.exists():
		run(['mingw32-make','install','MAKE=mingw32-make'],check=True,cwd=src_path)

class my_build_ext(build_ext):
	def build_extension(self,ext):
		if platform.system() == 'Windows':
			build_libsecp256k1()
		build_ext.build_extension(self,ext)

if platform.system() == 'Windows':
	home          = Path(os.environ['HOME'])
	cache_path    = home.joinpath('.cache','mmgen')
	src_path      = home.joinpath('.cache','mmgen','secp256k1')
	lib_file      = src_path.joinpath('.libs', 'libsecp256k1.dll.a')
	libraries     = ['gmp']
	include_dirs  = [str(src_path.joinpath('include'))]
	extra_objects = [str(lib_file)]
else:
	libraries     = []
	include_dirs  = []
	out = run(['/sbin/ldconfig','-p'],stdout=PIPE,text=True,check=True).stdout.splitlines()
	import sys,re
	extra_objects = [s.split()[-1] for s in out if re.search(r'libsecp256k1.*\.so$',s)]
	if not extra_objects:
		print('setup.py: unable to find shared libsecp256k1 library. Is it installed on your system?')
		sys.exit(1)

setup(
	cmdclass = { 'build_ext': my_build_ext },
	ext_modules = [Extension(
		name           = 'mmgen.proto.secp256k1.secp256k1',
		sources        = ['extmod/secp256k1mod.c'],
		libraries      = libraries,
		include_dirs   = include_dirs,
		extra_objects  = extra_objects,
	)]
)