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#!/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.
R'''Build a CMake project.
This script is used basically to invoke the CMake executable in a
cross-platform way (provided the platform has Python 3, of course). The
motivation was to merge my Travis and AppVeyor build scripts (largely similar,
but written in bash and PowerShell, respectively).
A simple usage example:
$ %(prog)s --configuration Release --install path/to/somewhere -- ../examples/simple
...
$ ./path/to/somewhere/bin/foo
foo
Picking the target platform is build system-specific. On Visual Studio, pass
the target platform using the `-A` flag like this:
> %(prog)s --install path\to\somewhere -- ..\examples\simple -A Win32
...
Using GCC-like compilers, the best way is to use CMake toolchain files (see
cmake/toolchains in this repository for examples).
$ %(prog)s --install path/to/somewhere -- ../examples/simple -D CMAKE_TOOLCHAIN_FILE="$( pwd )/../toolchains/mingw-x86.cmake"
...
'''
import argparse
from contextlib import contextmanager
import logging
from enum import Enum
import os
import os.path
import subprocess
import sys
import tempfile
def _run_executable(cmd_line):
logging.info('Running executable: %s', cmd_line)
return subprocess.run(cmd_line, check=True)
def _run_cmake(cmake_args):
_run_executable(['cmake'] + cmake_args)
class Configuration(Enum):
DEBUG = 'Debug'
RELEASE = 'Release'
def __str__(self):
return self.value
def _parse_configuration(s):
try:
return Configuration(s)
except ValueError:
raise argparse.ArgumentTypeError(f'invalid configuration: {s}')
@contextmanager
def _create_build_dir(args):
if args.build_dir is not None:
logging.info('Build directory: %s', args.build_dir)
yield args.build_dir
return
with tempfile.TemporaryDirectory(dir=os.path.dirname(args.src_dir)) as build_dir:
logging.info('Build directory: %s', build_dir)
try:
yield build_dir
finally:
logging.info('Removing build directory: %s', build_dir)
return
class GenerationPhase:
def __init__(self, build_dir, args):
self.build_dir = build_dir
self.args = args
def _cmake_args(self):
return self._to_cmake_args(self.build_dir, self.args)
@staticmethod
def _to_cmake_args(build_dir, args):
result = []
if args.install_dir is not None:
result += ['-D', f'CMAKE_INSTALL_PREFIX={args.install_dir}']
if args.configuration is not None:
result += ['-D', f'CMAKE_BUILD_TYPE={args.configuration}']
if args.cmake_args is not None:
result += args.cmake_args
result += [f'-B{build_dir}', f'-H{args.src_dir}']
return result
def run(self):
_run_cmake(self._cmake_args())
class BuildPhase:
def __init__(self, build_dir, args):
self.build_dir = build_dir
self.args = args
def _cmake_args(self):
return self._to_cmake_args(self.build_dir, self.args)
@staticmethod
def _to_cmake_args(build_dir, args):
result = ['--build', build_dir]
if args.configuration is not None:
result += ['--config', str(args.configuration)]
if args.install_dir is not None:
result += ['--target', 'install']
return result
def run(self):
_run_cmake(self._cmake_args())
def _parse_dir(s):
return os.path.abspath(os.path.normpath(s))
def _parse_args(argv=None):
if argv is None:
argv = sys.argv[1:]
logging.info('Command line arguments: %s', argv)
parser = argparse.ArgumentParser(
description=__doc__,
formatter_class=argparse.RawDescriptionHelpFormatter)
parser.add_argument('--build', metavar='DIR', dest='build_dir',
type=_parse_dir,
help='build directory (temporary directory unless specified)')
parser.add_argument('--install', metavar='DIR', dest='install_dir',
type=_parse_dir,
help='install directory')
parser.add_argument('--configuration', metavar='CONFIG',
type=_parse_configuration, default=Configuration.DEBUG,
help=f'build configuration ({"/".join(map(str, Configuration))})')
parser.add_argument('src_dir', metavar='DIR',
type=_parse_dir,
help='source directory')
parser.add_argument('cmake_args', nargs='*', metavar='CMAKE_ARG',
help='additional CMake arguments, to be passed verbatim')
args = parser.parse_args(argv)
return args
def _setup_logging():
logging.basicConfig(
format='%(asctime)s | %(levelname)s | %(message)s',
level=logging.INFO)
def build(argv=None):
args = _parse_args(argv)
with _create_build_dir(args) as build_dir:
gen_phase = GenerationPhase(build_dir, args)
gen_phase.run()
build_phase = BuildPhase(build_dir, args)
build_phase.run()
def main(argv=None):
_setup_logging()
try:
build(argv)
except Exception as e:
logging.exception(e)
raise
if __name__ == '__main__':
main()
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