#!/usr/bin/env python
# Copyright 2011 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from optparse import OptionParser
import sys
import os
import glob
import errno
import shlex
import subprocess

os.chdir(os.path.dirname(os.path.abspath(__file__)))

parser = OptionParser()
parser.add_option('--verbose', action='store_true',
                  help='enable verbose build',)
(options, conf_args) = parser.parse_args()

def run(*args, **kwargs):
    returncode = subprocess.call(*args, **kwargs)
    if returncode != 0:
        sys.exit(returncode)

# Compute system-specific CFLAGS/LDFLAGS as used in both in the below
# g++ call as well as in the later configure.py.
cflags = os.environ.get('CFLAGS', '').split()
ldflags = os.environ.get('LDFLAGS', '').split()
if sys.platform.startswith('freebsd'):
    cflags.append('-I/usr/local/include')
    ldflags.append('-L/usr/local/lib')

print 'Building ninja manually...'

try:
    os.mkdir('build')
except OSError, e:
    if e.errno != errno.EEXIST:
        raise

sources = []
for src in glob.glob('src/*.cc'):
    if src.endswith('test.cc') or src.endswith('.in.cc'):
        continue
    if src.endswith('bench.cc'):
        continue

    filename = os.path.basename(src)
    if filename == 'browse.cc':  # Depends on generated header.
        continue

    if sys.platform.startswith('win32'):
        if filename == 'subprocess.cc':
            continue
    else:
        if src.endswith('-win32.cc'):
            continue

    sources.append(src)

if sys.platform.startswith('win32'):
    sources.append('src/getopt.c')

vcdir = os.environ.get('VCINSTALLDIR')
if vcdir:
    args = [os.path.join(vcdir, 'bin', 'cl.exe'), '/nologo', '/EHsc', '/DNOMINMAX']
else:
    args = shlex.split(os.environ.get('CXX', 'g++'))
    args.extend(['-Wno-deprecated',
                 '-DNINJA_PYTHON="' + sys.executable + '"',
                 '-DNINJA_BOOTSTRAP'])
args.extend(cflags)
args.extend(ldflags)
binary = 'ninja.bootstrap'
if sys.platform.startswith('win32'):
    binary = 'ninja.bootstrap.exe'
args.extend(sources)
if vcdir:
    args.extend(['/link', '/out:' + binary])
else:
    args.extend(['-o', binary])

if options.verbose:
    print ' '.join(args)

run(args)

verbose = []
if options.verbose:
    verbose = ['-v']

print 'Building ninja using itself...'
run([sys.executable, 'configure.py'] + conf_args)
run(['./' + binary] + verbose)
os.unlink(binary)

print 'Done!'