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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.
# 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).
import argparse
import logging
from enum import Enum
import os
import os.path
import shutil
import subprocess
import sys
import tempfile
def _make_tmp_dir(**kwargs):
path = tempfile.mkdtemp(**kwargs)
logging.info('Created temporary directory: %s', path)
return path
def _log_rmtree_error(function, path, exc_info):
logging.error("Couldn't remove path '%s': %s", path, exc_info)
def _remove_dir(path):
logging.info('Removing directory: %s', path)
shutil.rmtree(path, onerror=_log_rmtree_error)
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}')
class BuildDir:
def __init__(self, args):
self.path = args.build_dir
self.clean = args.clean_build_dir
self.tmp_dir = self.path is None
if self.tmp_dir:
self.path = self._make_build_dir()
@staticmethod
def _make_build_dir():
return _make_tmp_dir(prefix='build_')
def __enter__(self):
return self
def __exit__(self, *args):
if self.tmp_dir and self.clean:
_remove_dir(self.path)
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.path}', 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.path]
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())
class CleanPhase:
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.path]
if args.configuration is not None:
result += ['--config', str(args.configuration)]
result += ['--target', 'clean']
return result
def run(self):
if self.args.clean_build_dir:
_run_cmake(self._cmake_args())
def _parse_args(argv=None):
if argv is None:
argv = sys.argv[1:]
logging.info('Command line arguments: %s', argv)
parser = argparse.ArgumentParser(description='Build a CMake project')
parser.add_argument('--src', required=True, metavar='DIR', dest='src_dir',
help='source directory')
parser.add_argument('--build', metavar='DIR', dest='build_dir',
help='build directory (temporary directory if not specified)')
parser.add_argument('--install', metavar='DIR', dest='install_dir',
help='install directory')
parser.add_argument('--clean', action='store_true', dest='clean_build_dir',
help='clean the build directory (temporary directory will be removed)')
parser.add_argument('--configuration', metavar='CONFIG',
type=_parse_configuration, default=Configuration.DEBUG,
help='build configuration (i.e. Debug/Release)')
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 BuildDir(args) as build_dir:
gen_phase = GenerationPhase(build_dir, args)
gen_phase.run()
build_phase = BuildPhase(build_dir, args)
build_phase.run()
clean_phase = CleanPhase(build_dir, args)
clean_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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