#!/usr/bin/env python

def distro_from_os_release():
    """ determine the distribution from the file /etc/os-release """
    dist_id = ''
    dist_version = ''
    try:
        for line in open('/etc/os-release'):
            name, value = line.split('=')
            value = value.strip().strip('"').strip("'")
            if name == 'ID':
                dist_id = value
            elif name == 'VERSION_ID':
                dist_version = value
    except IOError:
        pass
    except ValueError:
        pass
    return dist_id, dist_version

def targetplatform():
    try:
        # Python >= 2.6 have platform.linux_distribution
        import platform
        system = platform.system()
        machine = platform.machine()
        if system == 'Darwin':
            mach = platform.architecture()[0]
            if mach == '32bit' and not machine.startswith('i'):
                machine = 'i386'
            elif mach == '64bit' and machine in ['i386', 'i686']:
                machine = 'x86_64'
        # Python >= 3.8 does NOT have platform.linux_distribution
        distro = None
        if hasattr(platform, 'linux_distribution'):
            distribution = platform.linux_distribution(full_distribution_name=0)[:2]
        else:
            try:
                from aweremoterepo import distro
            except:
                import distro
            distribution = distro.linux_distribution(full_distribution_name=0)[:2]
            if distribution[1].find('.') == -1:
                distribution = (distribution[0], distro.lsb_release_info()['release'])
        if distribution[0] == 'scientific':
            distribution = ('redhat', distribution[1])
        if distribution[0] == 'centos':     # check for microversion
            if distribution[1].find('.') == -1 and distro:
                distribution = (distribution[0], distro.lsb_release_info()['release'])
            distribution = (distribution[0], '.'.join(distribution[1].split('.')[:2]))
        if distribution[0] == 'Ubuntu':     # to undo the Ubuntu mods!
            import os
            def linux_distribution(distname='', version='', id='',
                        supported_dists=platform._supported_dists,
                        full_distribution_name=1):
                try:
                    etc = os.listdir('/etc')
                except os.error:
                    # Probably not a Unix system
                    return distname,version,id
                etc.sort()
                for file in etc:
                    m = platform._release_filename.match(file)
                    if m is not None:
                        _distname,dummy = m.groups()
                        if _distname in supported_dists:
                            distname = _distname
                            break
                else:
                    return platform._dist_try_harder(distname,version,id)

                # Read the first line
                f = open('/etc/'+file, 'r')
                firstline = f.readline()
                f.close()
                _distname, _version, _id = platform._parse_release_file(firstline)

                if _distname and full_distribution_name:
                    distname = _distname
                if _version:
                    version = _version
                if _id:
                    id = _id
                return distname, version, id

            distribution = linux_distribution(full_distribution_name=0)[:2]

        # if distribution info can not be determined, use /etc/os-release
        if distribution[0] == '' and distribution[1] == '':
            distribution = distro_from_os_release()

    except ImportError:
        # Python version < 2.4 do not have platform
        import os
        system = os.uname()[0]
        machine = os.uname()[-1]
        distribution = ('', '')
    except AttributeError:
        # Python >= 2.4 and < 2.6 for Linux have platform.dist
        try:
            # Python >= 2.4 and < 2.6 for Linux
            distribution = platform.dist()[:2]
            if distribution[0] == 'redhat':
                # to make this compatible with Python >= 2.6
                import os
                if os.path.exists('/etc/fedora-release'):
                    distribution = ('fedora', distribution[1])
        except AttributeError:
            # Python >= 2.4 and < 2.6 non-Linux
            pass
    if distribution == ('', ''):
        result = (system, machine)
    else:
        result = (system, '-'.join(distribution), machine)
    return '-'.join(result).replace('/','.')


if __name__ == '__main__':
    import sys
    print(targetplatform())
    sys.exit(0)