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#!/usr/bin/env python

# YoctoAutobuilder force build script
#
# Copyright (C) 2017 Intel Corporation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program 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 General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

import urllib2
import urllib
import cookielib
import uuid
import sys
import argparse
import json
from bs4 import BeautifulSoup

class YoctoAutobuilderAPI(object):
    def __init__(self, server):
        self.server = server
        self.opener = urllib2.build_opener(
                urllib2.HTTPCookieProcessor(cookielib.CookieJar()))

    def login(self, user, passwd):
        data = urllib.urlencode(dict(username=user,
                                     passwd=passwd))
        url = self.server + "/login"
        request = urllib2.Request(url, data)
        result = self.opener.open(request).read()
        if result.find("The username or password you entered were not correct") > 0:
            print("Invalid username or password")
            return 1
        return 0

    def _get_builders(self):
        url = "%s/json/builders/?as_text=1" % (self.server)
        request = urllib2.Request(url)
        json_raw_data = self.opener.open(request)

        return json.load(json_raw_data)

    def list_builders(self):
        builders = self._get_builders()

        if builders:
            print('Available builders:\n')
            for builder in builders:
                print(builder)
            return 0
        else:
            print('No available builders in this server.')
            return 1

    def _get_options_by_builder(self, builder):
        options = {}

        url = "%s/builders/%s" % (self.server, builder)
        request = urllib2.Request(url)
        html = self.opener.open(request).read()

        inputs = BeautifulSoup(html, 'lxml').find_all('input')
        for input in inputs:
            type = input.attrs['type']
            if  type == 'submit':
                continue

            options[input.attrs['name']] = input.attrs['value']

        selects = BeautifulSoup(html, 'lxml').find_all('select')
        for select in selects:
            value = select.find_all('option', selected=True)[0].getText()
            options[select.attrs['name']] = value

        return options

    def list_options(self, builder):
        builders = self._get_builders()
        if not builder in builders:
            print('Builder %s specified isn\'t available' % builder)
            return 1

        opts = self._get_options_by_builder(builder)
        print('Available options in builder %s:\n' % (builder))
        for name in opts:
            value = opts[name]
            print('Name: %s, Default value: %s' % (name, value))

    def force_build(self, builder, opts, idle_check=False):
        builders = self._get_builders()
        if not builder in builders:
            print('Builder specified isn\'t available')
            return 1

        state = builders[builder]['state']
        if idle_check and not state == 'idle':
            print('Builder %s specified isn\'t IDLE, current state %s' \
                    % (builder, state))
            return 1

        if opts:
            # FIXME: transform string argument into dictionary, security?
            opts = eval(opts)
        else:
            opts = {}
        current_opts = self._get_options_by_builder(builder)
        for opt in opts:
            if not opt in current_opts:
                print('Option %s isn\'t supported by builder %s' % \
                        (opt, builder))
                return 1
            else:
                current_opts[opt] = opts[opt]

        url_params = urllib.urlencode(current_opts)
        url = "%s/builders/%s/force" % (self.server, builder)
        request = urllib2.Request(url, url_params)
        result = self.opener.open(request)
        if 'Forced build' in result.read():
            return 0
        else:
            print("Failed to force build")
            return 1

def main():
    parser = argparse.ArgumentParser(description="Yocto Autobuilder force build script",
            add_help=False)
    parser.add_argument('-s', '--server', help='Server URL',
            action='store', required=True)

    parser.add_argument('-u', '--username', action='store', required=True)
    parser.add_argument('-p', '--password', action='store', required=True)

    group = parser.add_mutually_exclusive_group()
    group.add_argument('--list-builders', help='List available builders',
            action='store_true')
    group.add_argument('--list-options', help='List options by builder',
            action='store', metavar='BUILDER')
    group.add_argument('--force-build', help='Force build by builder',
            action='store', metavar='BUILDER')
    group.add_argument('--force-build-idle', help='Force build by builder if is idle',
            action='store', metavar='BUILDER')

    parser.add_argument('-o', '--options', help='Custom options by operation',
            action='store')

    parser.add_argument('-d', '--debug', help='Enable debug output',
            action='store_true')
    parser.add_argument('-q', '--quiet', help='Print only errors',
            action='store_true')

    parser.add_argument('-h', '--help', action='help', default=argparse.SUPPRESS,
                        help='show this help message and exit')

    args = parser.parse_args()

    api = YoctoAutobuilderAPI(args.server)
    if api.login(args.username, args.password):
        return 1

    if args.list_builders:
        return api.list_builders()
    elif args.list_options:
        return api.list_options(args.list_options)
    elif args.force_build:
        return api.force_build(args.force_build, args.options)
    elif args.force_build_idle:
        return api.force_build(args.force_build_idle, args.options, idle_check=True)

if __name__ == '__main__':
    try:
        ret = main()
    except Exception:
        ret = 1
        import traceback
        traceback.print_exc()
    sys.exit(ret)