Tools/TestResultServer/handlers/buildershandler.py

# Copyright (C) 2013 Google Inc. All rights reserved.
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import datetime
import json
import logging
import re
import sys
import traceback
import urllib2
import webapp2

from google.appengine.api import memcache

MASTERS = [
    {'name': 'ChromiumWin', 'url_name': 'chromium.win', 'groups': ['@ToT Chromium']},
    {'name': 'ChromiumMac', 'url_name': 'chromium.mac', 'groups': ['@ToT Chromium']},
    {'name': 'ChromiumLinux', 'url_name': 'chromium.linux', 'groups': ['@ToT Chromium']},
    {'name': 'ChromiumChromiumOS', 'url_name': 'chromium.chromiumos', 'groups': ['@ToT ChromeOS']},
    {'name': 'ChromiumGPU', 'url_name': 'chromium.gpu', 'groups': ['@ToT Chromium']},
    {'name': 'ChromiumGPUFYI', 'url_name': 'chromium.gpu.fyi', 'groups': ['@ToT Chromium FYI']},
    {'name': 'ChromiumWebkit', 'url_name': 'chromium.webkit', 'groups': ['@ToT Chromium', '@ToT Blink']},
    {'name': 'ChromiumFYI', 'url_name': 'chromium.fyi', 'groups': ['@ToT Chromium FYI']},
    {'name': 'V8', 'url_name': 'client.v8', 'groups': ['@ToT V8']},
]

# Buildbot steps that have test in the name, but don't run tests.
NON_TEST_STEP_NAMES = [
    'archive',
    'Run tests',
    'find isolated tests',
    'read test spec',
    'Download latest chromedriver',
    'compile tests',
    'create_coverage_',
    'update test result log',
    'memory test:',
    'install_',
]

# Buildbot steps that run tests but don't upload results to the flakiness dashboard server.
# FIXME: These should be fixed to upload and then removed from this list.
TEST_STEPS_THAT_DO_NOT_UPLOAD_YET = [
    'java_tests(chrome',
    'python_tests(chrome',
    'run_all_tests.py',
    'test_report',
    'test CronetSample',
    'test_mini_installer',
    'telemetry_unittests',
    'webkit_python_tests',
    'webkit_unit_tests',
]

BUILDS_URL = 'http://chrome-build-extract.appspot.com/get_builds?builder=%s&master=%s&num_builds=1'
MASTER_URL = 'http://chrome-build-extract.appspot.com/get_master/%s'


class FetchBuildersException(Exception):
    pass


def fetch_json(url):
    logging.debug('Fetching %s' % url)
    fetched_json = {}
    try:
        resp = urllib2.urlopen(url)
    except:
        exc_info = sys.exc_info()
        logging.warning('Error while fetching %s: %s', url, exc_info[1])
        return fetched_json

    try:
        fetched_json = json.load(resp)
    except:
        exc_info = sys.exc_info()
        logging.warning('Unable to parse JSON response from %s: %s', url, exc_info[1])

    return fetched_json


def dump_json(data):
    return json.dumps(data, separators=(',', ':'), sort_keys=True)


def fetch_buildbot_data(masters):
    start_time = datetime.datetime.now()
    master_data = masters[:]
    for master in master_data:
        master_url = MASTER_URL % master['url_name']
        builders = fetch_json(master_url)
        if not builders:
            msg = 'Aborting fetch. Could not fetch builders from master "%s": %s.' % (master['name'], master_url)
            logging.warning(msg)
            raise FetchBuildersException(msg)

        tests_object = master.setdefault('tests', {})

        for builder in builders['builders'].keys():
            build = fetch_json(BUILDS_URL % (urllib2.quote(builder), master['url_name']))
            if not build:
                logging.info('Skipping builder %s on master %s due to empty data.', builder, master['url_name'])
                continue

            if not build['builds']:
                logging.info('Skipping builder %s on master %s due to empty builds list.', builder, master['url_name'])
                continue

            for step in build['builds'][0]['steps']:
                step_name = step['name']

                if not 'test' in step_name:
                    continue

                if any(name in step_name for name in NON_TEST_STEP_NAMES):
                    continue

                if re.search('_only|_ignore|_perf$', step_name):
                    continue

                if step_name == 'webkit_tests':
                    step_name = 'layout-tests'

                tests_object.setdefault(step_name, {'builders': []})
                tests_object[step_name]['builders'].append(builder)

        for builders in tests_object.values():
            builders['builders'].sort()

    output_data = {'masters': master_data, 'no_upload_test_types': TEST_STEPS_THAT_DO_NOT_UPLOAD_YET}

    delta = datetime.datetime.now() - start_time

    logging.info('Fetched buildbot data in %s seconds.', delta.seconds)

    return dump_json(output_data)


class UpdateBuilders(webapp2.RequestHandler):
    """Fetch and update the cached buildbot data."""
    def get(self):
        try:
            buildbot_data = fetch_buildbot_data(MASTERS)
            memcache.set('buildbot_data', buildbot_data)
            self.response.set_status(200)
            self.response.out.write("ok")
        except FetchBuildersException, ex:
            logging.error('Not updating builders because fetch failed: %s', str(ex))
            self.response.set_status(500)
            self.response.out.write(ex.message)


class GetBuilders(webapp2.RequestHandler):
    """Return a list of masters mapped to their respective builders, possibly using cached data."""
    def get(self):
        buildbot_data = memcache.get('buildbot_data')

        if not buildbot_data:
            logging.warning('No buildbot data in memcache. If this message repeats, something is probably wrong with memcache.')
            try:
                buildbot_data = fetch_buildbot_data(MASTERS)
                memcache.set('buildbot_data', buildbot_data)
            except FetchBuildersException, ex:
                logging.error('Builders fetch failed: %s', str(ex))
                self.response.set_status(500)
                self.response.out.write(ex.message)
                return

        callback = self.request.get('callback')
        if callback:
            buildbot_data = callback + '(' + buildbot_data + ');'

        self.response.out.write(buildbot_data)