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#!/usr/bin/env python
from __future__ import unicode_literals

import base64
import json
import mimetypes
import netrc
import optparse
import os
import sys

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from youtube_dl.compat import (
    compat_basestring,
    compat_input,
    compat_getpass,
    compat_print,
    compat_urllib_request,
)
from youtube_dl.utils import (
    make_HTTPS_handler,
    sanitized_Request,
)


class GitHubReleaser(object):
    _API_URL = 'https://api.github.com/repos/rg3/youtube-dl/releases'
    _UPLOADS_URL = 'https://uploads.github.com/repos/rg3/youtube-dl/releases/%s/assets?name=%s'
    _NETRC_MACHINE = 'github.com'

    def __init__(self, debuglevel=0):
        self._init_github_account()
        https_handler = make_HTTPS_handler({}, debuglevel=debuglevel)
        self._opener = compat_urllib_request.build_opener(https_handler)

    def _init_github_account(self):
        try:
            info = netrc.netrc().authenticators(self._NETRC_MACHINE)
            if info is not None:
                self._username = info[0]
                self._password = info[2]
                compat_print('Using GitHub credentials found in .netrc...')
                return
            else:
                compat_print('No GitHub credentials found in .netrc')
        except (IOError, netrc.NetrcParseError):
            compat_print('Unable to parse .netrc')
        self._username = compat_input(
            'Type your GitHub username or email address and press [Return]: ')
        self._password = compat_getpass(
            'Type your GitHub password and press [Return]: ')

    def _call(self, req):
        if isinstance(req, compat_basestring):
            req = sanitized_Request(req)
        # Authorizing manually since GitHub does not response with 401 with
        # WWW-Authenticate header set (see
        # https://developer.github.com/v3/#basic-authentication)
        b64 = base64.b64encode(
            ('%s:%s' % (self._username, self._password)).encode('utf-8')).decode('ascii')
        req.add_header('Authorization', 'Basic %s' % b64)
        response = self._opener.open(req).read().decode('utf-8')
        return json.loads(response)

    def list_releases(self):
        return self._call(self._API_URL)

    def create_release(self, tag_name, name=None, body='', draft=False, prerelease=False):
        data = {
            'tag_name': tag_name,
            'target_commitish': 'master',
            'name': name,
            'body': body,
            'draft': draft,
            'prerelease': prerelease,
        }
        req = sanitized_Request(self._API_URL, json.dumps(data).encode('utf-8'))
        return self._call(req)

    def create_asset(self, release_id, asset):
        asset_name = os.path.basename(asset)
        url = self._UPLOADS_URL % (release_id, asset_name)
        # Our files are small enough to be loaded directly into memory.
        data = open(asset, 'rb').read()
        req = sanitized_Request(url, data)
        mime_type, _ = mimetypes.guess_type(asset_name)
        req.add_header('Content-Type', mime_type or 'application/octet-stream')
        return self._call(req)


def main():
    parser = optparse.OptionParser(usage='%prog VERSION BUILDPATH')
    options, args = parser.parse_args()
    if len(args) != 2:
        parser.error('Expected a version and a build directory')

    version, build_path = args

    releaser = GitHubReleaser(debuglevel=0)

    new_release = releaser.create_release(
        version, name='youtube-dl %s' % version, draft=True, prerelease=True)
    release_id = new_release['id']

    for asset in os.listdir(build_path):
        compat_print('Uploading %s...' % asset)
        releaser.create_asset(release_id, os.path.join(build_path, asset))


if __name__ == '__main__':
    main()