wkhtmltopdf/scripts/build.py

#!/usr/bin/env python
#
# Copyright 2014 wkhtmltopdf authors
#
# This file is part of wkhtmltopdf.
#
# wkhtmltopdf is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# wkhtmltopdf is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with wkhtmltopdf.  If not, see <http:#www.gnu.org/licenses/>.

# --------------------------------------------------------------- CONFIGURATION

QT_CONFIG = {
    'common' : [
        '-opensource',
        '-confirm-license',
        '-fast',
        '-release',
        '-static',
        '-graphicssystem raster',
        '-webkit',
        '-exceptions',              # required by XmlPatterns
        '-xmlpatterns',             # required for TOC support
        '-system-zlib',
        '-system-libpng',
        '-system-libjpeg',
        '-no-libmng',
        '-no-libtiff',
        '-no-accessibility',
        '-no-stl',
        '-no-qt3support',
        '-no-phonon',
        '-no-phonon-backend',
        '-no-opengl',
        '-no-declarative',
        '-no-script',
        '-no-scripttools',
        '-no-sql-ibase',
        '-no-sql-mysql',
        '-no-sql-odbc',
        '-no-sql-psql',
        '-no-sql-sqlite',
        '-no-sql-sqlite2',
        '-no-mmx',
        '-no-3dnow',
        '-no-sse',
        '-no-sse2',
        '-no-multimedia',
        '-nomake demos',
        '-nomake docs',
        '-nomake examples',
        '-nomake tools',
        '-nomake tests',
        '-nomake translations'
    ],

    'msvc': [
        '-mp',
        '-qt-style-windows',
        '-qt-style-cleanlooks',
        '-no-style-windowsxp',
        '-no-style-windowsvista',
        '-no-style-plastique',
        '-no-style-motif',
        '-no-style-cde',
        '-openssl-linked'           # static linkage for OpenSSL
    ],

    'posix': [
        '-silent',                  # perform a silent build
        '-xrender',                 # xrender support is required
        '-largefile',
        '-rpath',
        '-openssl',                 # load OpenSSL binaries at runtime
        '-no-dbus',
        '-no-nis',
        '-no-cups',
        '-no-iconv',
        '-no-pch',
        '-no-gtkstyle',
        '-no-nas-sound',
        '-no-sm',
        '-no-xshape',
        '-no-xinerama',
        '-no-xcursor',
        '-no-xfixes',
        '-no-xrandr',
        '-no-mitshm',
        '-no-xinput',
        '-no-xkb',
        '-no-glib',
        '-no-gstreamer',
        '-D ENABLE_VIDEO=0',        # required as otherwise gstreamer gets linked in
        '-no-openvg',
        '-no-xsync',
        '-no-audio-backend',
        '-no-sse3',
        '-no-ssse3',
        '-no-sse4.1',
        '-no-sse4.2',
        '-no-avx',
        '-no-neon'
    ],

    'mingw-w64-cross' : [
        '-silent',                  # perform a silent build
        '-openssl-linked',          # static linkage for OpenSSL
        '-no-reduce-exports',
        '-no-rpath',
        '-xplatform win32-g++-4.6'
    ],

    'osx': [
        '-no-framework',
        '-no-dwarf2',
        '-xrender',                 # xrender support is required
        '-openssl',                 # load OpenSSL binaries at runtime
        '-largefile',
        '-rpath',
        'remove:-system-libpng',
        'remove:-system-libjpeg',
        '-qt-libpng',
        '-qt-libjpeg'
    ]
}

BUILDERS = {
    'msvc2008-win32':        'msvc',
    'msvc2008-win64':        'msvc',
    'msvc2010-win32':        'msvc',
    'msvc2010-win64':        'msvc',
    'msvc2012-win32':        'msvc',
    'msvc2012-win64':        'msvc',
    'msvc2013-win32':        'msvc',
    'msvc2013-win64':        'msvc',
    'msvc-winsdk71-win32':   'msvc_winsdk71',
    'msvc-winsdk71-win64':   'msvc_winsdk71',
    'setup-mingw-w64':       'setup_mingw64',
    'setup-schroot-centos5': 'setup_schroot',
    'setup-schroot-centos6': 'setup_schroot',
    'setup-schroot-wheezy':  'setup_schroot',
    'setup-schroot-trusty':  'setup_schroot',
    'setup-schroot-precise': 'setup_schroot',
    'update-all-schroots':   'update_schroot',
    'centos5-i386':          'linux_schroot',
    'centos5-amd64':         'linux_schroot',
    'centos6-i386':          'linux_schroot',
    'centos6-amd64':         'linux_schroot',
    'wheezy-i386':           'linux_schroot',
    'wheezy-amd64':          'linux_schroot',
    'trusty-i386':           'linux_schroot',
    'trusty-amd64':          'linux_schroot',
    'precise-i386':          'linux_schroot',
    'precise-amd64':         'linux_schroot',
    'mingw-w64-cross-win32': 'mingw64_cross',
    'mingw-w64-cross-win64': 'mingw64_cross',
    'posix-local':           'posix_local',
    'osx-cocoa-x86-64':      'osx',
    'osx-carbon-i386':       'osx'
}

CHROOT_SETUP  = {
    'wheezy': [
        ('debootstrap', 'wheezy', 'http://ftp.us.debian.org/debian/'),
        ('write_file', 'etc/apt/sources.list', """
deb     http://ftp.debian.org/debian/ wheezy         main contrib non-free
deb     http://ftp.debian.org/debian/ wheezy-updates main contrib non-free
deb     http://security.debian.org/   wheezy/updates main contrib non-free
deb-src http://ftp.debian.org/debian/ wheezy         main contrib non-free
deb-src http://ftp.debian.org/debian/ wheezy-updates main contrib non-free
deb-src http://security.debian.org/   wheezy/updates main contrib non-free"""),
        ('shell', 'apt-get update'),
        ('shell', 'apt-get dist-upgrade --assume-yes'),
        ('shell', 'apt-get install --assume-yes xz-utils'),
        ('shell', 'apt-get build-dep --assume-yes libqt4-core'),
        ('write_file', 'update.sh', 'apt-get update\napt-get dist-upgrade --assume-yes\n'),
        ('schroot_conf', 'Debian Wheezy')
    ],

    'trusty': [
        ('debootstrap', 'trusty', 'http://archive.ubuntu.com/ubuntu/'),
        ('write_file', 'etc/apt/sources.list', """
deb     http://archive.ubuntu.com/ubuntu/ trusty          main restricted universe multiverse
deb     http://archive.ubuntu.com/ubuntu/ trusty-updates  main restricted universe multiverse
deb     http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ trusty          main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ trusty-updates  main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse"""),
        ('shell', 'apt-get update'),
        ('shell', 'apt-get dist-upgrade --assume-yes'),
        ('shell', 'apt-get install --assume-yes xz-utils'),
        ('shell', 'apt-get build-dep --assume-yes libqt4-core'),
        ('write_file', 'update.sh', 'apt-get update\napt-get dist-upgrade --assume-yes\n'),
        ('schroot_conf', 'Ubuntu Trusty')
    ],

    'precise': [
        ('debootstrap', 'precise', 'http://archive.ubuntu.com/ubuntu/'),
        ('write_file', 'etc/apt/sources.list', """
deb     http://archive.ubuntu.com/ubuntu/ precise          main restricted universe multiverse
deb     http://archive.ubuntu.com/ubuntu/ precise-updates  main restricted universe multiverse
deb     http://archive.ubuntu.com/ubuntu/ precise-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ precise          main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ precise-updates  main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ precise-security main restricted universe multiverse"""),
        ('shell', 'apt-get update'),
        ('shell', 'apt-get dist-upgrade --assume-yes'),
        ('shell', 'apt-get install --assume-yes xz-utils'),
        ('shell', 'apt-get build-dep --assume-yes libqt4-core'),
        ('write_file', 'update.sh', 'apt-get update\napt-get dist-upgrade --assume-yes\n'),
        ('schroot_conf', 'Ubuntu Precise')
    ],

    'centos5': [
        ('rinse', 'centos-5'),
        ('shell', 'yum update -y'),
        ('append_file:amd64', 'etc/yum.conf', 'exclude = *.i?86\n'),
        ('shell', 'yum install -y gcc gcc-c++ make qt4-devel openssl-devel diffutils perl xz'),
        ('write_file', 'update.sh', 'yum update -y\n'),
        ('schroot_conf', 'CentOS 5')
    ],

    'centos6': [
        ('rinse', 'centos-6'),
        ('shell', 'yum update -y'),
        ('append_file:amd64', 'etc/yum.conf', 'exclude = *.i?86\n'),
        ('shell', 'yum install -y gcc gcc-c++ make qt4-devel openssl-devel diffutils perl tar xz'),
        ('write_file', 'update.sh', 'yum update -y\n'),
        ('schroot_conf', 'CentOS 6')
    ]
}

DEPENDENT_LIBS = {
    'openssl': {
        'order' : 1,
        'url'   : 'http://www.openssl.org/source/openssl-1.0.1g.tar.gz',
        'sha1'  : 'b28b3bcb1dc3ee7b55024c9f795be60eb3183e3c',
        'build' : {
            'msvc*-win32*': {
                'result': ['include/openssl/ssl.h', 'lib/ssleay32.lib', 'lib/libeay32.lib'],
                'commands': [
                    'perl Configure --openssldir=%(destdir)s VC-WIN32 no-asm',
                    'ms\\do_ms.bat',
                    'nmake /f ms\\nt.mak install'],
            },
            'msvc*-win64*': {
                'result': ['include/openssl/ssl.h', 'lib/ssleay32.lib', 'lib/libeay32.lib'],
                'commands': [
                    'perl Configure --openssldir=%(destdir)s VC-WIN64A',
                    'ms\\do_win64a.bat',
                    'nmake /f ms\\nt.mak install']
            },
            'mingw-w64-cross-win*': {
                'result': ['include/openssl/ssl.h', 'lib/libssl.a', 'lib/libcrypto.a'],
                'commands': [
                    'perl Configure --openssldir=%(destdir)s --cross-compile-prefix=%(mingw-w64)s- no-shared no-asm mingw64',
                    'make',
                    'make install_sw']
            }
        }
    },

    'zlib': {
        'order' : 2,
        'url'   : 'http://downloads.sourceforge.net/libpng/zlib-1.2.8.tar.gz',
        'sha1'  : 'a4d316c404ff54ca545ea71a27af7dbc29817088',
        'build' : {
            'msvc*': {
                'result': {
                    'include/zlib.h' : 'zlib.h',
                    'include/zconf.h': 'zconf.h',
                    'lib/zdll.lib'   : 'zlib.lib'
                },
                'replace':  [('win32/Makefile.msc', '-MD', '-MT')],
                'commands': ['nmake /f win32/Makefile.msc zlib.lib']
            },
            'mingw-w64-cross-win*': {
                'result': {
                    'include/zlib.h' : 'zlib.h',
                    'include/zconf.h': 'zconf.h',
                    'lib/libz.a'     : 'libz.a'
                },
                'replace':  [('win32/Makefile.gcc', 'PREFIX =', 'PREFIX = %(mingw-w64)s-')],
                'commands': ['make -f win32/Makefile.gcc']
            }
        }
    },

    'libpng': {
        'order' : 3,
        'url' : 'http://downloads.sourceforge.net/libpng/libpng-1.6.10.tar.gz',
        'sha1': 'cf81cf7df631bbfa649600b9a45d966b6bccac25',
        'build' : {
            'msvc*': {
                'result': {
                    'include/png.h'       : 'png.h',
                    'include/pngconf.h'   : 'pngconf.h',
                    'include/pnglibconf.h': 'pnglibconf.h',
                    'lib/libpng.lib'      : 'libpng.lib'
                },
                'replace': [
                    ('scripts/makefile.vcwin32', '-MD', '-MT'),
                    ('scripts/makefile.vcwin32', '-I..\\zlib', '-I..\\deplibs\\include'),
                    ('scripts/makefile.vcwin32', '..\\zlib\\zlib.lib', '..\\deplibs\\lib\\zdll.lib')],
                'commands': ['nmake /f scripts/makefile.vcwin32 libpng.lib']
            },
            'mingw-w64-cross-win*': {
                'result': {
                    'include/png.h'       : 'png.h',
                    'include/pngconf.h'   : 'pngconf.h',
                    'include/pnglibconf.h': 'pnglibconf.h',
                    'lib/libpng.a'        : 'libpng.a'
                },
                'replace': [
                    ('scripts/makefile.gcc', 'ZLIBINC = ../zlib', 'ZLIBINC = %(destdir)s/include'),
                    ('scripts/makefile.gcc', 'ZLIBLIB = ../zlib', 'ZLIBLIB = %(destdir)s/lib'),
                    ('scripts/makefile.gcc', 'CC = gcc', 'CC = %(mingw-w64)s-gcc'),
                    ('scripts/makefile.gcc', 'AR_RC = ar', 'AR_RC = %(mingw-w64)s-ar'),
                    ('scripts/makefile.gcc', 'RANLIB = ranlib', 'RANLIB = %(mingw-w64)s-ranlib')],
                'commands': ['make -f scripts/makefile.gcc libpng.a']
            }
        }
    },

    'libjpeg': {
        'order' : 4,
        'url' : 'http://ijg.org/files/jpegsrc.v9a.tar.gz',
        'sha1': 'd65ed6f88d318f7380a3a5f75d578744e732daca',
        'build' : {
            'msvc*': {
                'result': {
                    'include/jpeglib.h' : 'jpeglib.h',
                    'include/jmorecfg.h': 'jmorecfg.h',
                    'include/jerror.h'  : 'jerror.h',
                    'include/jconfig.h' : 'jconfig.h',
                    'lib/libjpeg.lib'   : 'libjpeg.lib'
                },
                'replace':  [('makefile.vc', '!include <win32.mak>', ''),
                             ('makefile.vc', '$(cc)', 'cl'),
                             ('makefile.vc', '$(cflags) $(cdebug) $(cvars)', '-c -nologo -D_CRT_SECURE_NO_DEPRECATE -MT -O2 -W3')],
                'commands': [
                    'copy /y jconfig.vc jconfig.h',
                    'nmake /f makefile.vc libjpeg.lib']
            },
            'mingw-w64-cross-win*': {
                'result': ['include/jpeglib.h', 'include/jmorecfg.h', 'include/jerror.h', 'include/jconfig.h', 'lib/libjpeg.a'],
                'commands': [
                    './configure --host=%(mingw-w64)s --disable-shared --prefix=%(destdir)s',
                    'make install']
            }
        }
    }
}

# --------------------------------------------------------------- HELPERS

import os, sys, platform, subprocess, shutil, re, fnmatch, multiprocessing, urllib, hashlib, tarfile

from os.path import exists

CPU_COUNT = max(2, multiprocessing.cpu_count()-1)   # leave one CPU free

def rchop(s, e):
    if s.endswith(e):
        return s[:-len(e)]
    return s

def message(msg):
    sys.stdout.write(msg)
    sys.stdout.flush()

def error(msg):
    message(msg+'\n')
    sys.exit(1)

def shell(cmd):
    ret = os.system(cmd)
    if ret != 0:
        error("command failed: exit code %d" % ret)

def get_output(*cmd):
    try:
        return subprocess.check_output(cmd, stderr=subprocess.STDOUT).strip()
    except:
        return None

def rmdir(path):
    if exists(path):
        shutil.rmtree(path)

def mkdir_p(path):
    if not exists(path):
        os.makedirs(path)

def get_version(basedir):
    mkdir_p(basedir)
    text = open(os.path.join(basedir, '..', 'VERSION'), 'r').read()
    if '-' not in text:
        return (text, text)
    version = text[:text.index('-')]
    os.chdir(os.path.join(basedir, '..'))
    hash = get_output('git', 'rev-parse', '--short', 'HEAD')
    if not hash:
        return (text, version)
    return ('%s-%s' % (version, hash), version)

def qt_config(key, *opts):
    input, output = [], []
    input.extend(QT_CONFIG['common'])
    input.extend(QT_CONFIG[key])
    input.extend(opts)
    cfg = os.environ.get('WKHTMLTOX_QT_CONFIG')
    if cfg:
        input.extend(cfg.split())
    for arg in input:
        if not arg.startswith('remove:-'):
            output.append(arg)
        elif arg[1+arg.index(':'):] in output:
            output.remove(arg[1+arg.index(':'):])
    return ' '.join(output)

def download_file(url, sha1, dir):
    name = url.split('/')[-1]
    loc  = os.path.join(dir, name)
    if os.path.exists(loc):
        hash = hashlib.sha1(open(loc, 'rb').read()).hexdigest()
        if hash == sha1:
            return loc
        os.remove(loc)
        message('Checksum mismatch for %s, re-downloading.\n' % name)
    def hook(cnt, bs, total):
        pct = int(cnt*bs*100/total)
        message("\rDownloading: %s [%d%%]" % (name, pct))
    urllib.urlretrieve(url, loc, reporthook=hook)
    message("\r")
    hash = hashlib.sha1(open(loc, 'rb').read()).hexdigest()
    if hash != sha1:
        os.remove(loc)
        error('Checksum mismatch for %s, aborting.' % name)
    message("\rDownloaded: %s [checksum OK]\n" % name)
    return loc

def download_tarball(url, sha1, dir, name):
    loc = download_file(url, sha1, dir)
    tar = tarfile.open(loc)
    sub = tar.getnames()[0]
    if '/' in sub:
        sub = sub[:sub.index('/')]
    src = os.path.join(dir, sub)
    tgt = os.path.join(dir, name)
    rmdir(src)
    tar.extractall(dir)
    rmdir(tgt)
    os.rename(src, tgt)
    return tgt

def _is_compiled(dst, loc):
    present = True
    for name in loc['result']:
        present = present and exists(os.path.join(dst, name))
    return present

def build_deplibs(config, basedir):
    mkdir_p(os.path.join(basedir, config))

    dstdir = os.path.join(basedir, config, 'deplibs')
    vars   = {'destdir': dstdir, 'mingw-w64': MINGW_W64_PREFIX.get(rchop(config, '-dbg'), '')}
    for lib in sorted(DEPENDENT_LIBS, key=lambda x: DEPENDENT_LIBS[x]['order']):
        cfg = None
        for key in DEPENDENT_LIBS[lib]['build']:
            if fnmatch.fnmatch(config, key):
                cfg = key

        if not cfg or _is_compiled(dstdir, DEPENDENT_LIBS[lib]['build'][cfg]):
            continue

        build_cfg = DEPENDENT_LIBS[lib]['build'][cfg]
        message('========== building: %s\n' % lib)
        srcdir = download_tarball(DEPENDENT_LIBS[lib]['url'], DEPENDENT_LIBS[lib]['sha1'],
                                  basedir, os.path.join(config, lib))

        for location, source, target in build_cfg.get('replace', []):
            data = open(os.path.join(srcdir, location), 'r').read()
            open(os.path.join(srcdir, location), 'w').write(data.replace(source, target % vars))

        os.chdir(srcdir)
        for command in build_cfg['commands']:
            shell(command % vars)
        if not type(build_cfg['result']) is list:
            for target in build_cfg['result']:
                mkdir_p(os.path.dirname(os.path.join(dstdir, target)))
                shutil.copy(build_cfg['result'][target], os.path.join(dstdir, target))
        os.chdir(dstdir)
        if not _is_compiled(dstdir, build_cfg):
            error("Unable to compile %s for your system, aborting." % lib)

        rmdir(srcdir)

def check_running_on_debian():
    if not sys.platform.startswith('linux') or not exists('/etc/apt/sources.list'):
        error('This can only be run on a Debian/Ubuntu distribution, aborting.')

    if os.geteuid() != 0:
        error('This script must be run as root.')

    if platform.architecture()[0] == '64bit' and 'amd64' not in ARCH:
        ARCH.insert(0, 'amd64')

PACKAGE_NAME = re.compile(r'ii\s+(.+?)\s+.*')
def install_packages(*names):
    lines = get_output('dpkg-query', '--list').split('\n')
    avail = [PACKAGE_NAME.match(line).group(1) for line in lines if PACKAGE_NAME.match(line)]
    inst  = [name for name in names if name in avail]

    if len(inst) != len(names):
        shell('apt-get update')
        shell('apt-get install --assume-yes %s' % (' '.join(names)))

# --------------------------------------------------------------- Linux chroot

ARCH = ['i386']

def check_setup_schroot(config):
    check_running_on_debian()
    login = os.environ.get('SUDO_USER') or get_output('logname')
    if not login or login == 'root':
        error('Unable to determine the login for which schroot access is to be given.')

def build_setup_schroot(config, basedir):
    install_packages('git', 'debootstrap', 'schroot', 'rinse', 'debian-archive-keyring')

    login  = os.environ.get('SUDO_USER') or get_output('logname')
    chroot = config[1+config.rindex('-'):]
    for arch in ARCH:
        message('******************* %s-%s\n' % (chroot, arch))
        base_dir = os.environ.get('WKHTMLTOX_CHROOT') or '/var/chroot'
        root_dir = os.path.join(base_dir, 'wkhtmltopdf-%s-%s' % (chroot, arch))
        rmdir(root_dir)
        mkdir_p(root_dir)
        for command in CHROOT_SETUP[chroot]:
            # handle architecture-specific commands
            name = command[0]
            if ':' in name:
                if name[1+name.rindex(':'):] != arch:
                    continue
                else:
                    name = name[:name.rindex(':')]

            # handle commands
            if name == 'debootstrap':
                shell('debootstrap --arch=%(arch)s --variant=buildd %(distro)s %(dir)s %(url)s' % {
                    'arch': arch, 'dir': root_dir, 'distro': command[1], 'url': command[2] })
            elif name == 'rinse':
                cmd = (arch == 'i386' and 'linux32 rinse' or 'rinse')
                shell('%s --arch %s --distribution %s --directory %s' % (cmd, arch, command[1], root_dir))
            elif name == 'shell':
                cmd = (arch == 'i386' and 'linux32 chroot' or 'chroot')
                shell('%s %s %s' % (cmd, root_dir, command[1]))
            elif name == 'write_file':
                open(os.path.join(root_dir, command[1]), 'w').write(command[2].strip())
            elif name == 'append_file':
                open(os.path.join(root_dir, command[1]), 'a').write(command[2].strip())
            elif name == 'schroot_conf':
                cfg = open('/etc/schroot/chroot.d/wkhtmltopdf-%s-%s' % (chroot, arch), 'w')
                cfg.write('[wkhtmltopdf-%s-%s]\n' % (chroot, arch))
                cfg.write('type=directory\ndirectory=%s/\n' % root_dir)
                cfg.write('description=%s %s for wkhtmltopdf\n' % (command[1], arch))
                cfg.write('users=%s\nroot-users=root\n' % login)
                if arch == 'i386' and 'amd64' in ARCH:
                    cfg.write('personality=linux32\n')
                cfg.close()

def check_update_schroot(config):
    check_running_on_debian()
    if not get_output('schroot', '--list'):
        error('Unable to determine the list of available schroots.')

def build_update_schroot(config, basedir):
    for name in get_output('schroot', '--list').split('\n'):
        message('******************* %s\n' % name[name.index('wkhtmltopdf-'):])
        shell('schroot -c %s -- /bin/bash /update.sh' % name[name.index('wkhtmltopdf-'):])

def check_setup_mingw64(config):
    check_running_on_debian()

def build_setup_mingw64(config, basedir):
    install_packages('build-essential', 'mingw-w64', 'nsis')

# --------------------------------------------------------------- MSVC (2008-2013)

MSVC_LOCATION = {
    'msvc2008': 'VS90COMNTOOLS',
    'msvc2010': 'VS100COMNTOOLS',
    'msvc2012': 'VS110COMNTOOLS',
    'msvc2013': 'VS120COMNTOOLS'
}

def check_msvc(config):
    version, arch = rchop(config, '-dbg').split('-')
    env_var = MSVC_LOCATION[version]
    if not env_var in os.environ:
        error("%s does not seem to be installed." % version)

    vcdir = os.path.join(os.environ[env_var], '..', '..', 'VC')
    if not exists(os.path.join(vcdir, 'vcvarsall.bat')):
        error("%s: unable to find vcvarsall.bat" % version)

    if arch == 'win32' and not exists(os.path.join(vcdir, 'bin', 'cl.exe')):
        error("%s: unable to find the x86 compiler" % version)

    if arch == 'win64' and not exists(os.path.join(vcdir, 'bin', 'amd64', 'cl.exe')) \
                       and not exists(os.path.join(vcdir, 'bin', 'x86_amd64', 'cl.exe')):
        error("%s: unable to find the amd64 compiler" % version)

def build_msvc(config, basedir):
    msvc, arch = rchop(config, '-dbg').split('-')
    vcdir = os.path.join(os.environ[MSVC_LOCATION[msvc]], '..', '..', 'VC')
    vcarg = 'x86'
    if arch == 'win64':
        if exists(os.path.join(vcdir, 'bin', 'amd64', 'cl.exe')):
            vcarg = 'amd64'
        else:
            vcarg = 'x86_amd64'

    python = sys.executable
    process = subprocess.Popen('("%s" %s>nul)&&"%s" -c "import os, sys; sys.stdout.write(repr(dict(os.environ)))"' % (
        os.path.join(vcdir, 'vcvarsall.bat'), vcarg, python), stdout=subprocess.PIPE, shell=True)
    stdout, _ = process.communicate()
    exitcode = process.wait()
    if exitcode != 0:
        error("%s: unable to initialize the environment" % msvc)

    os.environ.update(eval(stdout.strip()))

    build_msvc_common(config, basedir)

# --------------------------------------------------------------- MSVC via Windows SDK 7.1

def check_msvc_winsdk71(config):
    for pfile in ['ProgramFiles(x86)', 'ProgramFiles']:
        if pfile in os.environ and exists(os.path.join(os.environ[pfile], 'Microsoft SDKs', 'Windows', 'v7.1', 'Bin', 'SetEnv.cmd')):
            return
    error("Unable to detect the location of Windows SDK 7.1")

def build_msvc_winsdk71(config, basedir):
    arch = config[config.rindex('-'):]
    setenv = None
    for pfile in ['ProgramFiles(x86)', 'ProgramFiles']:
        if not pfile in os.environ:
            continue
        setenv = os.path.join(os.environ[pfile], 'Microsoft SDKs', 'Windows', 'v7.1', 'Bin', 'SetEnv.cmd')

    mode = debug and '/Debug' or '/Release'
    if arch == 'win64':
        args = '/2008 /x64 %s' % mode
    else:
        args = '/2008 /x86 %s' % mode

    python = sys.executable
    process = subprocess.Popen('("%s" %s>nul)&&"%s" -c "import os, sys; sys.stdout.write(repr(dict(os.environ)))"' % (
        setenv, args, python), stdout=subprocess.PIPE, shell=True)
    stdout, _ = process.communicate()
    exitcode = process.wait()
    if exitcode != 0:
        error("unable to initialize the environment for Windows SDK 7.1")

    os.environ.update(eval(stdout.strip()))

    build_msvc_common(config, basedir)

def build_msvc_common(config, basedir):
    version, simple_version = get_version(basedir)
    build_deplibs(config, basedir)

    libdir = os.path.join(basedir, config, 'deplibs')
    qtdir  = os.path.join(basedir, config, 'qt')
    mkdir_p(qtdir)

    configure_args = qt_config('msvc',
        '-I %s\\include' % libdir,
        '-L %s\\lib' % libdir,
        'OPENSSL_LIBS="-L%s\\\\lib -lssleay32 -llibeay32 -lUser32 -lAdvapi32 -lGdi32 -lCrypt32"' % libdir.replace('\\', '\\\\'))

    os.chdir(qtdir)
    if not exists('is_configured'):
        shell('%s\\..\\qt\\configure.exe %s' % (basedir, configure_args))
        open('is_configured', 'w').write('')
    shell('nmake')

    appdir = os.path.join(basedir, config, 'app')
    mkdir_p(appdir)
    os.chdir(appdir)
    rmdir('bin')
    mkdir_p('bin')

    os.environ['WKHTMLTOX_VERSION'] = version

    shell('%s\\bin\\qmake %s\\..\\wkhtmltopdf.pro' % (qtdir, basedir))
    shell('nmake')

    found = False
    for pfile in ['ProgramFiles(x86)', 'ProgramFiles']:
        if not pfile in os.environ or not exists(os.path.join(os.environ[pfile], 'NSIS', 'makensis.exe')):
            continue
        found = True

        makensis = os.path.join(os.environ[pfile], 'NSIS', 'makensis.exe')
        os.chdir(os.path.join(basedir, '..'))
        shell('"%s" /DVERSION=%s /DSIMPLE_VERSION=%s /DTARGET=%s wkhtmltox.nsi' % \
                (makensis, version, simple_version, config))

    if not found:
        message("\n\nCould not build installer as NSIS was not found.\n")

# ------------------------------------------------ MinGW-W64 Cross Environment

MINGW_W64_PREFIX = {
    'mingw-w64-cross-win32' : 'i686-w64-mingw32',
    'mingw-w64-cross-win64' : 'x86_64-w64-mingw32',
}

def check_mingw64_cross(config):
    shell('%s-gcc --version' % MINGW_W64_PREFIX[rchop(config, '-dbg')])

def build_mingw64_cross(config, basedir):
    version, simple_version = get_version(basedir)
    build_deplibs(config, basedir)

    libdir = os.path.join(basedir, config, 'deplibs')
    qtdir  = os.path.join(basedir, config, 'qt')

    configure_args = qt_config('mingw-w64-cross',
        '--prefix=%s'   % qtdir,
        '-I %s/include' % libdir,
        '-L %s/lib'     % libdir,
        '-device-option CROSS_COMPILE=%s-' % MINGW_W64_PREFIX[rchop(config, '-dbg')])

    os.environ['OPENSSL_LIBS'] = '-lssl -lcrypto -L %s/lib -lws2_32 -lgdi32 -lcrypt32' % libdir

    mkdir_p(qtdir)
    os.chdir(qtdir)

    if not exists('is_configured'):
        for var in ['CFLAGS', 'CXXFLAGS']:
            os.environ[var] = '-w'
        shell('%s/../qt/configure %s' % (basedir, configure_args))
        shell('touch is_configured')
    shell('make -j%d' % CPU_COUNT)

    appdir = os.path.join(basedir, config, 'app')
    mkdir_p(appdir)
    os.chdir(appdir)
    shell('rm -f bin/*')

    # set up cross compiling prefix correctly
    os.environ['WKHTMLTOX_VERSION'] = version
    shell('%s/bin/qmake -set CROSS_COMPILE %s-' % (qtdir, MINGW_W64_PREFIX[rchop(config, '-dbg')]))
    shell('%s/bin/qmake -spec win32-g++-4.6 %s/../wkhtmltopdf.pro' % (qtdir, basedir))
    shell('make')
    shutil.copy('bin/libwkhtmltox0.a', 'bin/wkhtmltox.lib')

    os.chdir(os.path.join(basedir, '..'))
    shell('makensis -DVERSION=%s -DSIMPLE_VERSION=%s -DTARGET=%s wkhtmltox.nsi' % \
            (version, simple_version, config))

# -------------------------------------------------- Linux schroot environment

def check_linux_schroot(config):
    shell('schroot -c wkhtmltopdf-%s -- gcc --version' % rchop(config, '-dbg'))

def build_linux_schroot(config, basedir):
    version, simple_version = get_version(basedir)

    dir    = os.path.join(basedir, config)
    script = os.path.join(dir, 'build.sh')
    dist   = os.path.join(dir, 'wkhtmltox-%s' % version)

    rmdir(dist)
    mkdir_p(os.path.join(dist, 'bin'))
    mkdir_p(os.path.join(dist, 'include', 'wkhtmltox'))
    mkdir_p(os.path.join(dist, 'lib'))

    configure_args = qt_config('posix', '--prefix=%s' % os.path.join(dir, 'qt'))

    lines = ['#!/bin/bash']
    lines.append('# start of autogenerated build script')
    lines.append('mkdir -p app qt')
    lines.append('cd qt')
    if config == 'centos5-i386':
        lines.append('export CFLAGS="-march=i486 -w"')
        lines.append('export CXXFLAGS="-march=i486 -w"')
    else:
        for var in ['CFLAGS', 'CXXFLAGS']:
            lines.append('export %s="-w"' % var)
    lines.append('if [ ! -f is_configured ]; then')
    lines.append('  ../../../qt/configure %s || exit 1' % configure_args)
    lines.append('  touch is_configured')
    lines.append('fi')
    lines.append('if ! make -j%d -q; then\n  make -j%d || exit 1\nfi' % (CPU_COUNT, CPU_COUNT))
    lines.append('cd ../app')
    lines.append('rm -f bin/*')
    lines.append('export WKHTMLTOX_VERSION=%s' % version)
    lines.append('../qt/bin/qmake ../../../wkhtmltopdf.pro')
    lines.append('make -j%d || exit 1' % CPU_COUNT)
    lines.append('strip bin/wkhtmltopdf bin/wkhtmltoimage')
    lines.append('cp bin/wkhtmlto* ../wkhtmltox-%s/bin' % version)
    lines.append('cp -P bin/libwkhtmltox*.so.* ../wkhtmltox-%s/lib' % version)
    lines.append('cp ../../../include/wkhtmltox/*.h ../wkhtmltox-%s/include/wkhtmltox' % version)
    lines.append('cp ../../../include/wkhtmltox/dll*.inc ../wkhtmltox-%s/include/wkhtmltox' % version)
    lines.append('cd ..')
    lines.append('tar -c -v -f ../wkhtmltox-%s_linux-%s.tar wkhtmltox-%s/' % (version, config, version))
    lines.append('xz --compress --force --verbose -9 ../wkhtmltox-%s_linux-%s.tar' % (version, config))
    lines.append('# end of build script')

    open(script, 'w').write('\n'.join(lines))
    os.chdir(dir)
    shell('chmod +x build.sh')
    shell('schroot -c wkhtmltopdf-%s -- ./build.sh' % rchop(config, '-dbg'))


# -------------------------------------------------- POSIX local environment

def check_posix_local(config):
    pass

def build_posix_local(config, basedir):
    version, simple_version = get_version(basedir)

    app    = os.path.join(basedir, config, 'app')
    qtdir  = os.path.join(basedir, config, 'qt')
    dist   = os.path.join(basedir, config, 'wkhtmltox-%s' % version)
    make   = get_output('which gmake') and 'gmake' or 'make'

    mkdir_p(qt)
    mkdir_p(app)

    rmdir(dist)
    mkdir_p(os.path.join(dist, 'bin'))
    mkdir_p(os.path.join(dist, 'include', 'wkhtmltox'))
    mkdir_p(os.path.join(dist, 'lib'))

    os.chdir(qt)
    if not exists('is_configured'):
        shell('../../../qt/configure %s' % qt_config('posix', '--prefix=%s' % qtdir))
        shell('touch is_configured')

    if subprocess.call([make, '-j%d' % CPU_COUNT]):
        shell('%s -j%d' % (make, CPU_COUNT))

    os.chdir(app)
    shell('rm -f bin/*')
    os.environ['WKHTMLTOX_VERSION'] = version
    shell('../qt/bin/qmake ../../../wkhtmltopdf.pro')
    shell('%s -j%d' % (make, CPU_COUNT))
    shell('cp bin/wkhtmlto* ../wkhtmltox-%s/bin' % version)
    shell('cp -P bin/libwkhtmltox*.so.* ../wkhtmltox-%s/lib' % version)
    shell('cp ../../../include/wkhtmltox/*.h ../wkhtmltox-%s/include/wkhtmltox' % version)
    shell('cp ../../../include/wkhtmltox/dll*.inc ../wkhtmltox-%s/include/wkhtmltox' % version)

    os.chdir(basedir)
    shell('tar -c -v -f ../wkhtmltox-%s_local-%s.tar wkhtmltox-%s/' % (version, platform.node(), version))
    shell('xz --compress --force --verbose -9 ../wkhtmltox-%s_local-%s.tar' % (version, platform.node()))

# --------------------------------------------------------------- OS X

def check_osx(config):
    if not platform.system() == 'Darwin' or not platform.mac_ver()[0]:
        error('This can only be run on a OS X system!')

    if not get_output('xcode-select', '--print-path'):
        error('Xcode is not installed, aborting.')

def build_osx(config, basedir):
    version, simple_version = get_version(basedir)

    osxver    = platform.mac_ver()[0][:platform.mac_ver()[0].rindex('.')]
    framework = config.split('-')[1]
    if osxver == '10.6':
        osxcfg = '-%s -platform macx-g++42' % framework
    else:
        osxcfg = '-%s -platform unsupported/macx-clang' % framework

    flags = ''
    if framework == 'carbon' and osxver != '10.6':
        for item in ['CFLAGS', 'CXXFLAGS']:
            flags += '"QMAKE_%s += %s" ' % (item, '-fvisibility=hidden -fvisibility-inlines-hidden')

    qt     = os.path.join(basedir, config, 'qt')
    app    = os.path.join(basedir, config, 'app')
    dist   = os.path.join(basedir, config, 'wkhtmltox-%s' % version)

    mkdir_p(qt)
    mkdir_p(app)

    rmdir(dist)
    mkdir_p(os.path.join(dist, 'bin'))
    mkdir_p(os.path.join(dist, 'include', 'wkhtmltox'))
    mkdir_p(os.path.join(dist, 'lib'))

    os.chdir(qt)
    if not exists('is_configured'):
        shell('../../../qt/configure %s' % qt_config('osx', '--prefix=%s' % qt, osxcfg))
        shell('touch is_configured')

    shell('make -j%d' % CPU_COUNT)

    os.chdir(app)
    shell('rm -f bin/*')
    os.environ['WKHTMLTOX_VERSION'] = version
    shell('../qt/bin/qmake %s ../../../wkhtmltopdf.pro' % flags)
    shell('make -j%d' % CPU_COUNT)

    if osxver not in ['10.6', '10.7']:
        for item in ['wkhtmltoimage', 'wkhtmltopdf', 'libwkhtmltox.%s.dylib' % simple_version]:
            shell(' '.join([
                'install_name_tool', '-change',
                '/System/Library/Frameworks/CoreText.framework/Versions/A/CoreText',
                '/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreText.framework/CoreText',
                'bin/'+item]))

    shell('cp bin/wkhtmlto* ../wkhtmltox-%s/bin' % version)
    shell('cp -P bin/libwkhtmltox*.dylib* ../wkhtmltox-%s/lib' % version)
    shell('cp ../../../include/wkhtmltox/*.h ../wkhtmltox-%s/include/wkhtmltox' % version)
    shell('cp ../../../include/wkhtmltox/dll*.inc ../wkhtmltox-%s/include/wkhtmltox' % version)

    os.chdir(os.path.join(basedir, config))
    shell('tar -c -v -f ../wkhtmltox-%s_%s.tar wkhtmltox-%s/' % (version, config, version))
    shell('xz --compress --force --verbose -9 ../wkhtmltox-%s_%s.tar' % (version, config))

# --------------------------------------------------------------- command line

def usage(exit_code=2):
    message("Usage: scripts/build.py <target> [-clean] [-debug]\n\nThe supported targets are:\n")
    opts = list(BUILDERS.keys())
    opts.sort()
    for opt in opts:
        message('* %s\n' % opt)
    sys.exit(exit_code)

def main():
    basedir = os.path.join(os.path.dirname(os.path.realpath(__file__)), '..', 'static-build')
    if len(sys.argv) == 1:
        usage(0)

    config = sys.argv[1]
    if config not in BUILDERS:
        usage()

    for arg in sys.argv[2:]:
        if not arg in ['-clean', '-debug']:
            usage()

    final_config = config
    if '-debug' in sys.argv[2:]:
        final_config += '-dbg'
        QT_CONFIG['common'].extend(['remove:-release', 'remove:-webkit', '-debug', '-webkit-debug'])

    if '-clean' in sys.argv[2:]:
        rmdir(os.path.join(basedir, config))

    globals()['check_%s' % BUILDERS[config]](final_config)
    globals()['build_%s' % BUILDERS[config]](final_config, os.path.realpath(basedir))

if __name__ == '__main__':
    main()