common.py

"""
This is the common settings file, intended to set sane defaults. If you have a
piece of configuration that's dependent on a set of feature flags being set,
then create a function that returns the calculated value based on the value of
MITX_FEATURES[...]. Modules that extend this one can change the feature
configuration in an environment specific config file and re-calculate those
values.

We should make a method that calls all these config methods so that you just
make one call at the end of your site-specific dev file to reset all the
dependent variables (like INSTALLED_APPS) for you.

Longer TODO:
1. Right now our treatment of static content in general and in particular
   course-specific static content is haphazard.
2. We should have a more disciplined approach to feature flagging, even if it
   just means that we stick them in a dict called MITX_FEATURES.
3. We need to handle configuration for multiple courses. This could be as
   multiple sites, but we do need a way to map their data assets.
"""

import sys
import tempfile
import os.path
import os
import lms.envs.common
from path import path
from xmodule.static_content import write_descriptor_styles, write_descriptor_js, write_module_js, write_module_styles

############################ FEATURE CONFIGURATION #############################

MITX_FEATURES = {
    'USE_DJANGO_PIPELINE': True,
    'GITHUB_PUSH': False,
    'ENABLE_DISCUSSION_SERVICE': False
}

# needed to use lms student app
GENERATE_RANDOM_USER_CREDENTIALS = False


############################# SET PATH INFORMATION #############################
PROJECT_ROOT = path(__file__).abspath().dirname().dirname()  # /mitx/cms
REPO_ROOT = PROJECT_ROOT.dirname()
COMMON_ROOT = REPO_ROOT / "common"
ENV_ROOT = REPO_ROOT.dirname()  # virtualenv dir /mitx is in

GITHUB_REPO_ROOT = ENV_ROOT / "data"

sys.path.append(REPO_ROOT)
sys.path.append(PROJECT_ROOT / 'djangoapps')
sys.path.append(PROJECT_ROOT / 'lib')
sys.path.append(COMMON_ROOT / 'djangoapps')
sys.path.append(COMMON_ROOT / 'lib')


############################# WEB CONFIGURATION #############################
# This is where we stick our compiled template files.
MAKO_MODULE_DIR = tempfile.mkdtemp('mako')
MAKO_TEMPLATES = {}
MAKO_TEMPLATES['main'] = [
    PROJECT_ROOT / 'templates',
    COMMON_ROOT / 'templates',
    COMMON_ROOT / 'djangoapps' / 'pipeline_mako' / 'templates'
]

for namespace, template_dirs in lms.envs.common.MAKO_TEMPLATES.iteritems():
    MAKO_TEMPLATES['lms.' + namespace] = template_dirs

TEMPLATE_DIRS = (
    PROJECT_ROOT / "templates",
)

MITX_ROOT_URL = ''

LOGIN_REDIRECT_URL = MITX_ROOT_URL + '/login'
LOGIN_URL = MITX_ROOT_URL + '/login'


TEMPLATE_CONTEXT_PROCESSORS = (
    'django.core.context_processors.request',
    'django.core.context_processors.static',
    'django.contrib.messages.context_processors.messages',
    'django.contrib.auth.context_processors.auth',  # this is required for admin
    'django.core.context_processors.csrf',  # necessary for csrf protection
)

LMS_BASE = None

################################# Jasmine ###################################
JASMINE_TEST_DIRECTORY = PROJECT_ROOT + '/static/coffee'


#################### CAPA External Code Evaluation #############################
XQUEUE_INTERFACE = {
    'url': 'http://localhost:8888',
    'django_auth': {'username': 'local',
                    'password': 'local'},
    'basic_auth': None,
}


################################# Middleware ###################################
# List of finder classes that know how to find static files in
# various locations.
STATICFILES_FINDERS = (
    'staticfiles.finders.FileSystemFinder',
    'staticfiles.finders.AppDirectoriesFinder',
)

# List of callables that know how to import templates from various sources.
TEMPLATE_LOADERS = (
    'django.template.loaders.filesystem.Loader',
    'django.template.loaders.app_directories.Loader',
)

MIDDLEWARE_CLASSES = (
    'contentserver.middleware.StaticContentServer',
    'django.middleware.cache.UpdateCacheMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',

    # Instead of AuthenticationMiddleware, we use a cache-backed version
    'cache_toolbox.middleware.CacheBackedAuthenticationMiddleware',

    'django.contrib.messages.middleware.MessageMiddleware',
    'track.middleware.TrackMiddleware',
    'mitxmako.middleware.MakoMiddleware',

    'django.middleware.transaction.TransactionMiddleware'
)

############################ SIGNAL HANDLERS ################################
# This is imported to register the exception signal handling that logs exceptions
import monitoring.exceptions  # noqa

############################ DJANGO_BUILTINS ################################
# Change DEBUG/TEMPLATE_DEBUG in your environment settings files, not here
DEBUG = False
TEMPLATE_DEBUG = False

# Site info
SITE_ID = 1
SITE_NAME = "localhost:8000"
HTTPS = 'on'
ROOT_URLCONF = 'cms.urls'
IGNORABLE_404_ENDS = ('favicon.ico')

# Email
EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'
DEFAULT_FROM_EMAIL = 'registration@edx.org'
DEFAULT_FEEDBACK_EMAIL = 'feedback@edx.org'
ADMINS = (
    ('edX Admins', 'admin@edx.org'),
)
MANAGERS = ADMINS

# Static content
STATIC_URL = '/static/'
ADMIN_MEDIA_PREFIX = '/static/admin/'
STATIC_ROOT = ENV_ROOT / "staticfiles"

STATICFILES_DIRS = [
    COMMON_ROOT / "static",
    PROJECT_ROOT / "static",

# This is how you would use the textbook images locally
#    ("book", ENV_ROOT / "book_images")
]
if os.path.isdir(GITHUB_REPO_ROOT):
    STATICFILES_DIRS += [
        # TODO (cpennington): When courses aren't loaded from github, remove this
        (course_dir, GITHUB_REPO_ROOT / course_dir)
        for course_dir in os.listdir(GITHUB_REPO_ROOT)
        if os.path.isdir(GITHUB_REPO_ROOT / course_dir)
    ]

# Locale/Internationalization
TIME_ZONE = 'America/New_York'  # http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
LANGUAGE_CODE = 'en'            # http://www.i18nguy.com/unicode/language-identifiers.html
USE_I18N = True
USE_L10N = True

# Messages
MESSAGE_STORAGE = 'django.contrib.messages.storage.session.SessionStorage'

############################### Pipeline #######################################

STATICFILES_STORAGE = 'pipeline.storage.PipelineCachedStorage'

# Load javascript and css from all of the available descriptors, and
# prep it for use in pipeline js
from xmodule.raw_module import RawDescriptor
from xmodule.error_module import ErrorDescriptor
from rooted_paths import rooted_glob, remove_root

write_descriptor_styles(PROJECT_ROOT / "static/sass/descriptor", [RawDescriptor, ErrorDescriptor])
write_module_styles(PROJECT_ROOT / "static/sass/module", [RawDescriptor, ErrorDescriptor])

descriptor_js = remove_root(
    PROJECT_ROOT / 'static',
    write_descriptor_js(
        PROJECT_ROOT / "static/coffee/descriptor",
        [RawDescriptor, ErrorDescriptor]
    )
)
module_js = remove_root(
    PROJECT_ROOT / 'static',
    write_module_js(
        PROJECT_ROOT / "static/coffee/module",
        [RawDescriptor, ErrorDescriptor]
    )
)

PIPELINE_CSS = {
    'base-style': {
        'source_filenames': ['sass/base-style.scss'],
        'output_filename': 'css/cms-base-style.css',
    },
}

PIPELINE_ALWAYS_RECOMPILE = ['sass/base-style.scss']

PIPELINE_JS = {
    'main': {
        'source_filenames': sorted(
            rooted_glob(COMMON_ROOT / 'static/', 'coffee/src/**/*.coffee') +
            rooted_glob(PROJECT_ROOT / 'static/', 'coffee/src/**/*.coffee')
        ) + ['js/base.js'],
        'output_filename': 'js/cms-application.js',
    },
    'module-js': {
        'source_filenames': descriptor_js + module_js,
        'output_filename': 'js/cms-modules.js',
    },
    'spec': {
        'source_filenames': sorted(rooted_glob(PROJECT_ROOT / 'static/', 'coffee/spec/**/*.coffee')),
        'output_filename': 'js/cms-spec.js'
    }
}

PIPELINE_COMPILERS = [
    'pipeline.compilers.sass.SASSCompiler',
    'pipeline.compilers.coffee.CoffeeScriptCompiler',
]

PIPELINE_SASS_ARGUMENTS = '-t compressed -r {proj_dir}/static/sass/bourbon/lib/bourbon.rb'.format(proj_dir=PROJECT_ROOT)

PIPELINE_CSS_COMPRESSOR = None
PIPELINE_JS_COMPRESSOR = None

STATICFILES_IGNORE_PATTERNS = (
    "sass/*",
    "coffee/*",
    "*.py",
    "*.pyc"
)

PIPELINE_YUI_BINARY = 'yui-compressor'
PIPELINE_SASS_BINARY = 'sass'
PIPELINE_COFFEE_SCRIPT_BINARY = 'coffee'

# Setting that will only affect the MITx version of django-pipeline until our changes are merged upstream
PIPELINE_COMPILE_INPLACE = True

############################ APPS #####################################

INSTALLED_APPS = (
    # Standard apps
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'south',

    # For CMS
    'contentstore',
    'github_sync',
    'student',  # misleading name due to sharing with lms

    # For asset pipelining
    'pipeline',
    'staticfiles',

    # For testing
    'django_jasmine',
)