1 files changed, 334 insertions, 0 deletions
diff --git a/boost/build/build.py b/boost/build/build.py
new file mode 100755
index 0000000..d535338
--- /dev/null
+++ b/boost/build/build.py
@@ -0,0 +1,334 @@
+#!/usr/bin/env python3
+
+# Copyright (c) 2019 Egor Tensin <Egor.Tensin@gmail.com>
+# This file is part of the "cmake-common" project.
+# For details, see https://github.com/egor-tensin/cmake-common.
+# Distributed under the MIT License.
+
+# This script downloads and builds the Boost libraries.
+# It's main utility is being able to download & unpack the Boost distribution
+# archive in a cross-platform way + setting the correct --stagedir parameter
+# value to avoid name clashes.
+
+import argparse
+from contextlib import contextmanager
+from enum import Enum
+import logging
+import os.path
+import platform
+import re
+import shutil
+import subprocess
+import sys
+import tempfile
+import urllib.request
+
+
+@contextmanager
+def _chdir(path):
+    cwd = os.getcwd()
+    os.chdir(path)
+    try:
+        yield
+    finally:
+        os.chdir(cwd)
+
+
+def _setup_logging():
+    logging.basicConfig(
+        format='%(asctime)s | %(levelname)s | %(message)s',
+        level=logging.INFO)
+
+
+def _on_windows():
+    return platform.system() == 'Windows'
+
+
+def _run_executable(cmd_line):
+    logging.info('Running executable: %s', cmd_line)
+    return subprocess.run(cmd_line, check=True)
+
+
+class Platform(Enum):
+    X86 = 'x86'
+    X64 = 'x64'
+    WIN32 = 'Win32'
+
+    def __str__(self):
+        return self.value
+
+    @staticmethod
+    def all():
+        return (Platform.X86, Platform.X64)
+
+    def get_address_model(self):
+        if self is Platform.X86:
+            return 32
+        if self is Platform.X64:
+            return 64
+        if self is Platform.WIN32:
+            return 32
+        raise NotImplementedError(f'unsupported platform: {self}')
+
+
+def _parse_platform(s):
+    try:
+        return Platform(s)
+    except ValueError:
+        raise argparse.ArgumentTypeError(f'invalid platform: {s}')
+
+
+class Configuration(Enum):
+    DEBUG = 'Debug'
+    RELEASE = 'Release'
+
+    @staticmethod
+    def all():
+        return tuple(Configuration)
+
+    def __str__(self):
+        return self.value
+
+
+def _parse_configuration(s):
+    try:
+        return Configuration(s)
+    except ValueError:
+        raise argparse.ArgumentTypeError(f'invalid configuration: {s}')
+
+
+class BoostVersion:
+    def __init__(self, major, minor, patch):
+        self.major = major
+        self.minor = minor
+        self.patch = patch
+
+    @staticmethod
+    def from_string(s):
+        result = re.match(r'^(\d+)\.(\d+)\.(\d+)$', s)
+        if result is None:
+            raise ValueError(f'invalid Boost version: {s}')
+        return BoostVersion(result.group(1), result.group(2), result.group(3))
+
+    def __str__(self):
+        return f'{self.major}.{self.minor}.{self.patch}'
+
+    @property
+    def archive_ext(self):
+        return '.tar.gz'
+
+    def dir_path(self, parent_dir):
+        return os.path.join(parent_dir, self.dir_name)
+
+    @property
+    def dir_name(self):
+        return f'boost_{self.major}_{self.minor}_{self.patch}'
+
+    @property
+    def archive_name(self):
+        return f'{self.dir_name}{self.archive_ext}'
+
+    def get_download_url(self):
+        return f'https://dl.bintray.com/boostorg/release/{self}/source/{self.archive_name}'
+
+
+class BoostArchive:
+    def __init__(self, version, path):
+        self.version = version
+        self.path = path
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        logging.info('Removing temporary file: %s', self.path)
+        os.remove(self.path)
+
+    @property
+    def dir_name(self):
+        return self.version.dir_name
+
+    @staticmethod
+    def download(version):
+        path = None
+        with tempfile.NamedTemporaryFile(prefix='boost_', suffix=version.archive_ext, delete=False) as dest:
+            path = dest.name
+            logging.info('Downloading Boost to: %s', path)
+            url = version.get_download_url()
+            logging.info('Download URL: %s', url)
+
+            with urllib.request.urlopen(url) as request:
+                dest.write(request.read())
+        return BoostArchive(version, path)
+
+
+class BoostDir:
+    def __init__(self, path):
+        if not os.path.isdir(path):
+            raise RuntimeError(f"Boost directory doesn't exist: {path}")
+        self.path = path
+
+    @staticmethod
+    def unpack(archive, dest):
+        path = os.path.join(dest, archive.dir_name)
+        if os.path.exists(path):
+            raise RuntimeError(f'Boost directory already exists: {path}')
+        logging.info('Unpacking Boost to: %s', path)
+        shutil.unpack_archive(archive.path, dest)
+        return BoostDir(path)
+
+    def _go(self):
+        return _chdir(self.path)
+
+    def build(self, params):
+        with self._go():
+            self._bootstrap_if_required()
+            self._b2(params)
+
+    def _bootstrap_if_required(self):
+        if os.path.isfile(self._b2_path()):
+            logging.info('Not going to bootstrap, b2 is already there')
+            return
+        self.bootstrap()
+
+    def bootstrap(self):
+        with self._go():
+            _run_executable(self._bootstrap_path())
+
+    def _b2(self, params):
+        for b2_params in params.enum_b2_params():
+            _run_executable([self._b2_path()] + b2_params)
+
+    @staticmethod
+    def _bootstrap_path():
+        return os.path.join('.', BoostDir._bootstrap_name())
+
+    @staticmethod
+    def _bootstrap_name():
+        ext = '.sh'
+        if _on_windows():
+            ext = '.bat'
+        return f'bootstrap{ext}'
+
+    @staticmethod
+    def _b2_path():
+        return os.path.join('.', BoostDir._b2_name())
+
+    @staticmethod
+    def _b2_name():
+        ext = ''
+        if _on_windows():
+            ext = '.exe'
+        return f'b2{ext}'
+
+
+class BoostBuild:
+    def __init__(self, args):
+        self.platforms = args.platforms or Platform.all()
+        self.configurations = args.configurations or Configuration.all()
+        self.b2_args = args.b2_args
+
+    def enum_b2_params(self):
+        for platform in self.platforms:
+            platform_params = []
+            platform_params.append(self._address_model(platform))
+            platform_params += self.b2_args
+            if _on_windows():
+                platform_params.append(self._windows_stagedir(platform))
+                platform_params.append(self._windows_variant(self.configurations))
+                yield platform_params
+            else:
+                for configuration in self.configurations:
+                    variant_params = list(platform_params)
+                    variant_params.append(self._unix_stagedir(platform, configuration))
+                    variant_params.append(self._unix_variant(configuration))
+                    yield variant_params
+
+    @staticmethod
+    def _address_model(platform):
+        return f'address-model={platform.get_address_model()}'
+
+    @staticmethod
+    def _windows_stagedir(platform):
+        return f'--stagedir=stage/{platform}'
+
+    @staticmethod
+    def _unix_stagedir(platform, configuration):
+        return f'--stagedir=stage/{platform}/{configuration}'
+
+    @staticmethod
+    def _windows_variant(configurations):
+        variant = ','.join((str(config).lower() for config in configurations))
+        return f'variant={variant}'
+
+    @staticmethod
+    def _unix_variant(configuration):
+        return f'variant={str(configuration).lower()}'
+
+
+def _parse_args(argv=None):
+    if argv is None:
+        argv = sys.argv[1:]
+    logging.info('Command line arguments: %s', argv)
+
+    parser = argparse.ArgumentParser()
+    subparsers = parser.add_subparsers(dest='command')
+
+    download = subparsers.add_parser('download', help='download Boost')
+    download.add_argument('boost_version', metavar='VERSION',
+                          type=BoostVersion.from_string,
+                          help='Boost version (in the MAJOR.MINOR.PATCH format)')
+    download.add_argument('--build', metavar='DIR', dest='build_dir',
+                          type=os.path.abspath, default='.',
+                          help='destination directory')
+
+    build = subparsers.add_parser('build', help='build Boost libraries')
+    build.add_argument('--platform', metavar='PLATFORM',
+                       nargs='*', dest='platforms', default=[],
+                       type=_parse_platform,
+                       help='target platform (e.g. x86/x64)')
+    build.add_argument('--configuration', metavar='CONFIGURATION',
+                       nargs='*', dest='configurations', default=[],
+                       type=_parse_configuration,
+                       help='target configuration (e.g. Debug/Release)')
+    build.add_argument('boost_dir', metavar='DIR',
+                       help='Boost root directory')
+    build.add_argument('b2_args', nargs='*', metavar='B2_ARG', default=[],
+                       help='additional b2 arguments, to be passed verbatim')
+
+    return parser.parse_args(argv)
+
+
+def build(args):
+    build_params = BoostBuild(args)
+    boost_dir = BoostDir(args.boost_dir)
+    boost_dir.build(build_params)
+
+
+def download(args):
+    with BoostArchive.download(args.boost_version) as archive:
+        boost_dir = BoostDir.unpack(archive, args.build_dir)
+        boost_dir.bootstrap()
+
+
+def main(argv=None):
+    args = _parse_args(argv)
+    if args.command == 'download':
+        download(args)
+    elif args.command == 'build':
+        build(args)
+    else:
+        raise NotImplementedError(f'unsupported command: {args.command}')
+
+
+def _main(argv=None):
+    _setup_logging()
+    try:
+        main(argv)
+    except Exception as e:
+        logging.exception(e)
+        raise
+
+
+if __name__ == '__main__':
+    _main()