# -*- coding: utf-8 -*-
#
# Copyright © 2012 Pierre Raybaut
# Licensed under the terms of the MIT License
# (see winpython/__init__.py for details)

"""
WinPython Package Manager

Created on Fri Aug 03 14:32:26 2012
"""

from __future__ import print_function

import os
import os.path as osp
import shutil
import re
import sys
import subprocess

# Local imports
from winpython import utils
from winpython.config import DATA_PATH
from winpython.py3compat import configparser as cp

# from former wppm separate script launcher
from argparse import ArgumentParser
from winpython import py3compat


# Workaround for installing PyVISA on Windows from source:
os.environ['HOME'] = os.environ['USERPROFILE']

# pep503 defines normalized package names: www.python.org/dev/peps/pep-0503
def normalize(name):
    return re.sub(r"[-_.]+", "-", name).lower()
    
def get_package_metadata(database, name):
    """Extract infos (description, url) from the local database"""
    # Note: we could use the PyPI database but this has been written on
    # machine which is not connected to the internet
    db = cp.ConfigParser()
    db.readfp(open(osp.join(DATA_PATH, database)))
    metadata = dict(description='', url='https://pypi.org/project/' + name)
    for key in metadata:
        name1 = name.lower()
        # wheel replace '-' per '_' in key
        for name2 in (name1, name1.split('-')[0], name1.replace('-', '_'),
                      '-'.join(name1.split('_')), normalize(name)):
            try:
                metadata[key] = db.get(name2, key)
                break
            except (cp.NoSectionError, cp.NoOptionError):
                pass
    return metadata


class BasePackage(object):
    def __init__(self, fname):
        self.fname = fname
        self.name = None
        self.version = None
        self.architecture = None
        self.pyversion = None
        self.description = None
        self.url = None

    def __str__(self):
        text = "%s %s" % (self.name, self.version)
        pytext = ""
        if self.pyversion is not None:
            pytext = " for Python %s" % self.pyversion
        if self.architecture is not None:
            if not pytext:
                pytext = " for Python"
            pytext += " %dbits" % self.architecture
        text += "%s\n%s\nWebsite: %s\n[%s]" % (pytext, self.description,
                                               self.url,
                                               osp.basename(self.fname))
        return text

    def is_compatible_with(self, distribution):
        """Return True if package is compatible with distribution in terms of
        architecture and Python version (if applyable)"""
        iscomp = True
        if self.architecture is not None:
            # Source distributions (not yet supported though)
            iscomp = iscomp and self.architecture == distribution.architecture
        if self.pyversion is not None:
            # Non-pure Python package
            iscomp = iscomp and self.pyversion == distribution.version
        return iscomp

    def extract_optional_infos(self):
        """Extract package optional infos (description, url)
        from the package database"""
        metadata = get_package_metadata('packages.ini', self.name)
        for key, value in list(metadata.items()):
            setattr(self, key, value)


class Package(BasePackage):
    def __init__(self, fname):
        BasePackage.__init__(self, fname)
        self.files = []
        self.extract_infos()
        self.extract_optional_infos()

    def extract_infos(self):
        """Extract package infos (name, version, architecture)
        from filename (installer basename)"""
        bname = osp.basename(self.fname)
        if bname.endswith(('32.whl', '64.whl')):
            # {name}[-{bloat}]-{version}-{python tag}-{abi tag}-{platform tag}.whl 
            # ['sounddevice','0.3.5','py2.py3.cp34.cp35','none','win32'] 
            # PyQt5-5.7.1-5.7.1-cp34.cp35.cp36-none-win_amd64.whl
            bname2 = bname[:-4].split("-")             
            self.name = bname2[0]
            self.version = '-'.join(list(bname2[1:-3]))
            self.pywheel, abi, arch = bname2[-3:]
            self.pyversion = None # Let's ignore this  self.pywheel
            # wheel arch is 'win32' or 'win_amd64'
            self.architecture = 32 if arch == 'win32' else 64
            return
        elif bname.endswith(('.zip', '.tar.gz', '.whl')):
            # distutils sdist
            infos = utils.get_source_package_infos(bname)
            if infos is not None:
                self.name, self.version = infos
                return
        raise NotImplementedError("Not supported package type %s" % bname)

    def logpath(self, logdir):
        """Return full log path"""
        return osp.join(logdir, osp.basename(self.fname+'.log'))

    def save_log(self, logdir):
        """Save log (pickle)"""
        header = ['# WPPM package installation log',
                  '# ',
                  '# Package: %s v%s' % (self.name, self.version),
                  '']
        open(self.logpath(logdir), 'w').write('\n'.join(header + self.files))

    def load_log(self, logdir):
        """Load log (pickle)"""
        try:
            data = open(self.logpath(logdir), 'U').readlines()
        except (IOError, OSError):
            data = []  # it can be now ()
        self.files = []
        for line in data:
            relpath = line.strip()
            if relpath.startswith('#') or len(relpath) == 0:
                continue
            self.files.append(relpath)

    def remove_log(self, logdir):
        """Remove log (after uninstalling package)"""
        try:
            os.remove(self.logpath(logdir))
        except WindowsError:
            pass


class WininstPackage(BasePackage):
    def __init__(self, fname, distribution):
        BasePackage.__init__(self, fname)
        self.logname = None
        self.distribution = distribution
        self.architecture = distribution.architecture
        self.pyversion = distribution.version
        self.extract_infos()
        self.extract_optional_infos()

    def extract_infos(self):
        """Extract package infos (name, version, architecture)"""
        match = re.match(r'Remove([a-zA-Z0-9\-\_\.]*)\.exe', self.fname)
        if match is None:
            return
        self.name = match.groups()[0]
        self.logname = '%s-wininst.log' % self.name
        fd = open(osp.join(self.distribution.target, self.logname), 'U')
        searchtxt = 'DisplayName='
        for line in fd.readlines():
            pos = line.find(searchtxt)
            if pos != -1:
                break
        else:
            return
        fd.close()
        match = re.match(r'Python %s %s-([0-9\.]*)'
                         % (self.pyversion, self.name),
                         line[pos+len(searchtxt):])
        if match is None:
            return
        self.version = match.groups()[0]

    def uninstall(self):
        """Uninstall package"""
        subprocess.call([self.fname, '-u', self.logname],
                        cwd=self.distribution.target)


class Distribution(object):
    # PyQt module is now like :PyQt4-...
    NSIS_PACKAGES = ('PyQt4', 'PyQwt', 'PyQt5')  # known NSIS packages

    def __init__(self, target=None, verbose=False, indent=False):
        self.target = target
        self.verbose = verbose
        self.indent = indent
        self.logdir = None

        # if no target path given, take the current python interpreter one
        if self.target is None:
            self.target = os.path.dirname(sys.executable)

        self.init_log_dir()
        self.to_be_removed = []  # list of directories to be removed later

        self.version, self.architecture = utils.get_python_infos(target)

    def clean_up(self):
        """Remove directories which couldn't be removed when building"""
        for path in self.to_be_removed:
            try:
                shutil.rmtree(path, onerror=utils.onerror)
            except WindowsError:
                print("Directory %s could not be removed" % path,
                      file=sys.stderr)

    def remove_directory(self, path):
        """Try to remove directory -- on WindowsError, remove it later"""
        try:
            shutil.rmtree(path)
        except WindowsError:
            self.to_be_removed.append(path)

    def init_log_dir(self):
        """Init log path"""
        path = osp.join(self.target, 'Logs')
        if not osp.exists(path):
            os.mkdir(path)
        self.logdir = path

    def copy_files(self, package, targetdir,
                   srcdir, dstdir, create_bat_files=False):
        """Add copy task"""
        srcdir = osp.join(targetdir, srcdir)
        if not osp.isdir(srcdir):
            return
        offset = len(srcdir)+len(os.pathsep)
        for dirpath, dirnames, filenames in os.walk(srcdir):
            for dname in dirnames:
                t_dname = osp.join(dirpath, dname)[offset:]
                src = osp.join(srcdir, t_dname)
                dst = osp.join(dstdir, t_dname)
                if self.verbose:
                    print("mkdir: %s" % dst)
                full_dst = osp.join(self.target, dst)
                if not osp.exists(full_dst):
                    os.mkdir(full_dst)
                package.files.append(dst)
            for fname in filenames:
                t_fname = osp.join(dirpath, fname)[offset:]
                src = osp.join(srcdir, t_fname)
                if dirpath.endswith('_system32'):
                    # Files that should be copied in %WINDIR%\system32
                    dst = fname
                else:
                    dst = osp.join(dstdir, t_fname)
                if self.verbose:
                    print("file:  %s" % dst)
                full_dst = osp.join(self.target, dst)
                shutil.move(src, full_dst)
                package.files.append(dst)
                name, ext = osp.splitext(dst)
                if create_bat_files and ext in ('', '.py'):
                    dst = name + '.bat'
                    if self.verbose:
                        print("file:  %s" % dst)
                    full_dst = osp.join(self.target, dst)
                    fd = open(full_dst, 'w')
                    fd.write("""@echo off
python "%~dpn0""" + ext + """" %*""")
                    fd.close()
                    package.files.append(dst)

    def create_file(self, package, name, dstdir, contents):
        """Generate data file -- path is relative to distribution root dir"""
        dst = osp.join(dstdir, name)
        if self.verbose:
            print("create:  %s" % dst)
        full_dst = osp.join(self.target, dst)
        open(full_dst, 'w').write(contents)
        package.files.append(dst)

    def get_installed_packages(self):
        """Return installed packages"""
        # Packages installed with WPPM
        wppm = [Package(logname[:-4]) for logname in os.listdir(self.logdir)
                if '.whl.log' not in logname ]
        # Packages installed with distutils wininst
        wininst = []
        for name in os.listdir(self.target):
            if name.startswith('Remove') and name.endswith('.exe'):
                try:
                    pack = WininstPackage(name, self)
                except IOError:
                    continue
                if pack.name is not None and pack.version is not None:
                    wininst.append(pack)
        # Include package installed via pip (not via WPPM)
        try:
            if os.path.dirname(sys.executable) == self.target:
                #  direct way: we interrogate ourself, using official API
                import pkg_resources, imp
                imp.reload(pkg_resources)
                pip_list = [(i.key, i.version)
                             for i in pkg_resources.working_set]  
            else:
                #  indirect way: we interrogate something else
                cmdx=[osp.join(self.target, 'python.exe'), '-c',
                      "import pip;from pip._internal.utils.misc import  get_installed_distributions as pip_get_installed_distributions ;print('+!+'.join(['%s@+@%s@+@' % (i.key,i.version)  for i in pip_get_installed_distributions()]))"]
                p = subprocess.Popen(cmdx, shell=True, stdout=subprocess.PIPE,
                                     cwd=self.target)
                stdout, stderr = p.communicate()
                start_at = 2 if sys.version_info >= (3,0) else 0
                pip_list = [line.split("@+@")[:2] for line in
                            ("%s" % stdout)[start_at:].split("+!+")]

            # create pip package list
            wppip = [Package('%s-%s-py2.py3-none-any.whl' %
                     (i[0].replace('-', '_').lower(), i[1])) for i in pip_list]
            # pip package version is supposed better
            already = set(b.name.replace('-', '_') for b in wppip+wininst)
            wppm = wppip + [i for i in wppm
                            if i.name.replace('-', '_').lower() not in already]
        except:
            pass
        return sorted(wppm + wininst, key=lambda tup: tup.name.lower())

    def find_package(self, name):
        """Find installed package"""
        for pack in self.get_installed_packages():
            if normalize(pack.name) == normalize(name):
                return pack


    def uninstall_existing(self, package):
        """Uninstall existing package (or package name)"""
        if isinstance(package ,str):
            pack = self.find_package(package)
        else:
            pack = self.find_package(package.name)
        if pack is not None:
            self.uninstall(pack)

    def patch_all_shebang(self, to_movable=True, max_exe_size=999999, targetdir=""):
        """make all python launchers relatives"""
        import glob
        import os
        for ffname in glob.glob(r'%s\Scripts\*.exe' % self.target):
            size = os.path.getsize(ffname)
            if size <= max_exe_size:
                utils.patch_shebang_line(ffname, to_movable=to_movable,
                                         targetdir=targetdir)
        for ffname in glob.glob(r'%s\Scripts\*.py' % self.target):
            utils.patch_shebang_line_py(ffname, to_movable=to_movable,
                                        targetdir=targetdir)


    def install(self, package, install_options=None):
        """Install package in distribution"""
        assert package.is_compatible_with(self)
        tmp_fname = None

        # wheel addition
        if package.fname.endswith(('.whl', '.tar.gz', '.zip')):
            self.install_bdist_direct(package, install_options=install_options)

        bname = osp.basename(package.fname)
        if bname.endswith('.exe'):
            if re.match(r'(' + ('|'.join(self.NSIS_PACKAGES)) + r')-', bname):
                self.install_nsis_package(package)
            else:
                self.install_bdist_wininst(package)
        elif bname.endswith('.msi'):
            self.install_bdist_msi(package)
        self.handle_specific_packages(package)
        # minimal post-install actions
        self.patch_standard_packages(package.name)
        if not package.fname.endswith(('.whl', '.tar.gz', '.zip')):
            package.save_log(self.logdir)
        if tmp_fname is not None:
            os.remove(tmp_fname)

    def do_pip_action(self, actions=None, install_options=None):
        """Do pip action in a distribution"""
        my_list = install_options
        if my_list is None:
            my_list = []
        my_actions = actions
        if my_actions is None:
            my_actions = []
        executing = osp.join(self.target, '..', 'scripts', 'env.bat')
        if osp.isfile(executing):
            complement = [r'&&' , 'cd' , '/D', self.target,
                          r'&&', osp.join(self.target, 'python.exe') ]
            complement += [ '-m', 'pip']
        else:
            executing = osp.join(self.target, 'python.exe')
            complement = [ '-m', 'pip']
        try:
            fname = utils.do_script(this_script=None,
                        python_exe=executing,
                        architecture=self.architecture, verbose=self.verbose,
                        install_options=complement + my_actions + my_list)
        except RuntimeError:
            if not self.verbose:
                print("Failed!")
                raise

    def patch_standard_packages(self, package_name='', to_movable=True):
        """patch Winpython packages in need"""
        import filecmp
        # 'pywin32' minimal post-install (pywin32_postinstall.py do too much)
        if package_name.lower() == "pywin32" or package_name == '':
            origin = self.target + (r"\Lib\site-packages\pywin32_system32")
            destin = self.target
            if osp.isdir(origin):
                for name in os.listdir(origin):
                    here, there = osp.join(origin, name), osp.join(destin, name)
                    if (not os.path.exists(there) or
                       not filecmp.cmp(here, there)):
                        shutil.copyfile(here, there)
        # 'pip' to do movable launchers (around line 100) !!!!
        # rational: https://github.com/pypa/pip/issues/2328
        if package_name.lower() == "pip" or package_name == '':
            # ensure pip will create movable launchers
            # sheb_mov1 = classic way up to WinPython 2016-01
            # sheb_mov2 = tried  way, but doesn't work for pip (at least)
            sheb_fix = " executable = get_executable()"
            sheb_mov1 = " executable = os.path.join(os.path.basename(get_executable()))"
            sheb_mov2 = " executable = os.path.join('..',os.path.basename(get_executable()))"
            if to_movable:
                utils.patch_sourcefile(self.target +
                r"\Lib\site-packages\pip\_vendor\distlib\scripts.py",
                sheb_fix, sheb_mov1)
                utils.patch_sourcefile(self.target +
                r"\Lib\site-packages\pip\_vendor\distlib\scripts.py",
                sheb_mov2, sheb_mov1)
            else:
                utils.patch_sourcefile(self.target +
                r"\Lib\site-packages\pip\_vendor\distlib\scripts.py",
                sheb_mov1, sheb_fix)
                utils.patch_sourcefile(self.target +
                r"\Lib\site-packages\pip\_vendor\distlib\scripts.py",
                sheb_mov2, sheb_fix)
                
            # ensure pip wheel will register relative PATH in 'RECORD' files
            # will be in standard pip 8.0.3
            utils.patch_sourcefile(
              self.target + (
              r"\Lib\site-packages\pip\wheel.py"),
              " writer.writerow((f, h, l))",
              " writer.writerow((normpath(f, lib_dir), h, l))")

            # create movable launchers for previous package installations
            self.patch_all_shebang(to_movable=to_movable)

        if package_name.lower() == "spyder" or package_name == '':
            # spyder don't goes on internet without I ask
            utils.patch_sourcefile(
              self.target + (
              r"\Lib\site-packages\spyderlib\config\main.py"),
              "'check_updates_on_startup': True,",
              "'check_updates_on_startup': False,")
            utils.patch_sourcefile(
              self.target + (
              r"\Lib\site-packages\spyder\config\main.py"),
              "'check_updates_on_startup': True,",
              "'check_updates_on_startup': False,")
            utils.patch_sourcefile(
              self.target + (
              r"\Lib\site-packages\spyder\config\main.py"),
              "'icon_theme': 'spyder 3'",
              "'icon_theme': 'spyder 2'")

        # workaround bad installers
        if package_name.lower() == "numba":
            self.create_pybat(['numba', 'pycc'])
        else:
            self.create_pybat(package_name.lower())


    def create_pybat(self, names='', contents=r"""@echo off
..\python "%~dpn0" %*"""):
        """Create launcher batch script when missing"""

        scriptpy = osp.join(self.target, 'Scripts')  # std Scripts of python
        if not list(names) == names:
            my_list = [f for f in os.listdir(scriptpy) if '.' not in f 
                     and f.startswith(names)]
        else:
            my_list = names
        for name in my_list:
            if osp.isdir(scriptpy) and osp.isfile(osp.join(scriptpy, name)):
                if (not osp.isfile(osp.join(scriptpy, name + '.exe')) and
                   not osp.isfile(osp.join(scriptpy, name + '.bat'))):
                    fd = open(osp.join(scriptpy, name + '.bat'), 'w')
                    fd.write(contents)
                    fd.close()

    def handle_specific_packages(self, package):
        """Packages requiring additional configuration"""
        if package.name.lower() in ('pyqt4', 'pyqt5', 'pyside2'):
            # Qt configuration file (where to find Qt)
            name = 'qt.conf'
            contents = """[Paths]
Prefix = .
Binaries = ."""
            self.create_file(package, name,
                             osp.join('Lib', 'site-packages', package.name),
                             contents)
            self.create_file(package, name, '.',
                             contents.replace('.', './Lib/site-packages/%s' % package.name))
            # pyuic script
            if package.name.lower() == 'pyqt5':
                # see http://code.activestate.com/lists/python-list/666469/
                tmp_string = r'''@echo off
if "%WINPYDIR%"=="" call "%~dp0..\..\scripts\env.bat"
"%WINPYDIR%\python.exe" -m PyQt5.uic.pyuic %1 %2 %3 %4 %5 %6 %7 %8 %9'''

            else:
                tmp_string = r'''@echo off
if "%WINPYDIR%"=="" call "%~dp0..\..\scripts\env.bat"
"%WINPYDIR%\python.exe" "%WINPYDIR%\Lib\site-packages\package.name\uic\pyuic.py" %1 %2 %3 %4 %5 %6 %7 %8 %9'''

            self.create_file(package, 'pyuic%s.bat' % package.name[-1],
                'Scripts', tmp_string.replace('package.name', package.name))
            # Adding missing __init__.py files (fixes Issue 8)
            uic_path = osp.join('Lib', 'site-packages', package.name, 'uic')
            for dirname in ('Loader', 'port_v2', 'port_v3'):
                self.create_file(package, '__init__.py',
                                 osp.join(uic_path, dirname), '')

    def _print(self, package, action):
        """Print package-related action text (e.g. 'Installing')
        indicating progress"""
        text = " ".join([action, package.name, package.version])
        if self.verbose:
            utils.print_box(text)
        else:
            if self.indent:
                text = (' '*4) + text
            print(text + '...', end=" ")

    def _print_done(self):
        """Print OK at the end of a process"""
        if not self.verbose:
            print("OK")

    def uninstall(self, package):
        """Uninstall package from distribution"""
        self._print(package, "Uninstalling")
        if isinstance(package, WininstPackage):
            package.uninstall()
            package.remove_log(self.logdir)
        elif not package.name == 'pip':
            # trick to get true target (if not current)
            this_executable_path = os.path.dirname(self.logdir)
            subprocess.call([this_executable_path + r'\python.exe',
                            '-m', 'pip', 'uninstall', package.name, '-y'],
                            cwd=this_executable_path)
            # legacy, if some package installed by old non-pip means
            package.load_log(self.logdir)
            for fname in reversed(package.files):
                path = osp.join(self.target, fname)
                if osp.isfile(path):
                    if self.verbose:
                        print("remove: %s" % fname)
                    os.remove(path)
                    if fname.endswith('.py'):
                        for suffix in ('c', 'o'):
                            if osp.exists(path+suffix):
                                if self.verbose:
                                    print("remove: %s" % (fname+suffix))
                                os.remove(path+suffix)
                elif osp.isdir(path):
                    if self.verbose:
                        print("rmdir:  %s" % fname)
                    pycache = osp.join(path, '__pycache__')
                    if osp.exists(pycache):
                        try:
                            shutil.rmtree(pycache, onerror=utils.onerror)
                            if self.verbose:
                                print("rmtree: %s" % pycache)
                        except WindowsError:
                            print("Directory %s could not be removed"
                                  % pycache, file=sys.stderr)
                    try:
                        os.rmdir(path)
                    except OSError:
                        if self.verbose:
                            print("unable to remove directory: %s" % fname,
                                  file=sys.stderr)
                else:
                    if self.verbose:
                        print("file not found: %s" % fname, file=sys.stderr)
            package.remove_log(self.logdir)
        self._print_done()

    def install_bdist_wininst(self, package):
        """Install a distutils package built with the bdist_wininst option
        (binary distribution, .exe file)"""
        self._print(package, "Extracting")
        targetdir = utils.extract_archive(package.fname)
        self._print_done()

        self._print(package, "Installing %s from " % targetdir)
        self.copy_files(package, targetdir, 'PURELIB',
                        osp.join('Lib', 'site-packages'))
        self.copy_files(package, targetdir, 'PLATLIB',
                        osp.join('Lib', 'site-packages'))
        self.copy_files(package, targetdir, 'SCRIPTS', 'Scripts',
                        create_bat_files=True)
        self.copy_files(package, targetdir, 'DLLs', 'DLLs')
        self.copy_files(package, targetdir, 'DATA', '.')
        self._print_done()

    def install_bdist_direct(self, package, install_options=None):
        """Install a package directly !"""
        self._print(package, "Installing %s" % package.fname.split(".")[-1])
        # targetdir = utils.extract_msi(package.fname, targetdir=self.target)
        try:
            fname = utils.direct_pip_install(package.fname,
                        python_exe=osp.join(self.target, 'python.exe'),
                        architecture=self.architecture, verbose=self.verbose,
                        install_options=install_options)
        except RuntimeError:
            if not self.verbose:
                print("Failed!")
                raise
        package = Package(fname)
        self._print_done()

    def install_script(self, script, install_options=None):
        try:
            fname = utils.do_script(script,
                        python_exe=osp.join(self.target, 'python.exe'),
                        architecture=self.architecture, verbose=self.verbose,
                        install_options=install_options)
        except RuntimeError:
            if not self.verbose:
                print("Failed!")
                raise

    def install_bdist_msi(self, package):
        """Install a distutils package built with the bdist_msi option
        (binary distribution, .msi file)"""
        raise NotImplementedError
        # self._print(package, "Extracting")
        # targetdir = utils.extract_msi(package.fname, targetdir=self.target)
        # self._print_done()

    def install_nsis_package(self, package):
        """Install a Python package built with NSIS (e.g. PyQt or PyQwt)
        (binary distribution, .exe file)"""
        bname = osp.basename(package.fname)
        assert bname.startswith(self.NSIS_PACKAGES)
        self._print(package, "Extracting")
        targetdir = utils.extract_exe(package.fname)
        self._print_done()

        self._print(package, "Installing")
        self.copy_files(package, targetdir, 'Lib', 'Lib')
        if bname.startswith('PyQt5'):
            # PyQt5
            outdir = osp.join('Lib', 'site-packages', 'PyQt5')
        elif bname.startswith('PyQt'):
            # PyQt4
            outdir = osp.join('Lib', 'site-packages', 'PyQt4')
        else:
            # Qwt5
            outdir = osp.join('Lib', 'site-packages', 'PyQt4', 'Qwt5')
        self.copy_files(package, targetdir, '$_OUTDIR', outdir)
        self._print_done()

def main(test=False):
    if test:
        sbdir = osp.join(osp.dirname(__file__),
                     os.pardir, os.pardir, os.pardir, 'sandbox')
        tmpdir = osp.join(sbdir, 'tobedeleted')

        # fname = osp.join(tmpdir, 'scipy-0.10.1.win-amd64-py2.7.exe')
        fname = osp.join(sbdir, 'VTK-5.10.0-Qt-4.7.4.win32-py2.7.exe')
        print(Package(fname))
        sys.exit()
        target = osp.join(utils.BASE_DIR, 'build',
                      'winpython-2.7.3', 'python-2.7.3')
        fname = osp.join(utils.BASE_DIR, 'packages.src', 'docutils-0.9.1.tar.gz')

        dist = Distribution(target, verbose=True)
        pack = Package(fname)
        print(pack.description)
        # dist.install(pack)
        # dist.uninstall(pack)
    else:

        parser = ArgumentParser(description="WinPython Package Manager: install, "\
                        "uninstall or upgrade Python packages on a Windows "\
                        "Python distribution like WinPython.")
        parser.add_argument('fname', metavar='package',
                    type=str if py3compat.PY3 else unicode,
                    help='path to a Python package')
        parser.add_argument('-t', '--target', dest='target', default=sys.prefix,
                    help='path to target Python distribution '\
                         '(default: "%s")' % sys.prefix)
        parser.add_argument('-i', '--install', dest='install',
                    action='store_const', const=True, default=False,
                    help='install package (this is the default action)')
        parser.add_argument('-u', '--uninstall', dest='uninstall',
                    action='store_const', const=True, default=False,
                    help='uninstall package')
        args = parser.parse_args()

        if args.install and args.uninstall:
            raise RuntimeError("Incompatible arguments: --install and --uninstall")

        if not args.install and not args.uninstall:
            args.install = True

        if not osp.isfile(args.fname) and args.install:
            raise IOError("File not found: %s" % args.fname)

        if utils.is_python_distribution(args.target):
            dist = Distribution(args.target)
            try:
                if args.uninstall:
                    package = dist.find_package(args.fname)
                    dist.uninstall(package)
                else:
                    package = Package(args.fname)
                    if args.install and package.is_compatible_with(dist):
                       dist.install(package)
                    else:
                        raise RuntimeError("Package is not compatible with Python "\
                               "%s %dbit" % (dist.version, dist.architecture))
            except NotImplementedError:
                raise RuntimeError("Package is not (yet) supported by WPPM")
        else:
            raise WindowsError("Invalid Python distribution %s" % args.target)

if __name__ == '__main__':
    main()