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environment.py
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environment.py
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# -*- coding: utf-8 -*-
"""Pylons environment configuration"""
import os
import logging
import warnings
from urlparse import urlparse
import pylons
from paste.deploy.converters import asbool
import sqlalchemy
from pylons import config
from genshi.template import TemplateLoader
from genshi.filters.i18n import Translator
import ckan.config.routing as routing
import ckan.model as model
import ckan.plugins as p
import ckan.lib.helpers as h
import ckan.lib.app_globals as app_globals
import ckan.lib.render as render
import ckan.lib.search as search
import ckan.logic as logic
import ckan.new_authz as new_authz
import ckan.lib.jinja_extensions as jinja_extensions
from ckan.common import _, ungettext
log = logging.getLogger(__name__)
# Suppress benign warning 'Unbuilt egg for setuptools'
warnings.simplefilter('ignore', UserWarning)
class _Helpers(object):
''' Helper object giving access to template helpers stopping
missing functions from causing template exceptions. Useful if
templates have helper functions provided by extensions that have
not been enabled. '''
def __init__(self, helpers):
self.helpers = helpers
self._setup()
def _setup(self):
helpers = self.helpers
functions = {}
allowed = helpers.__allowed_functions__[:]
# list of functions due to be deprecated
self.deprecated = []
for helper in dir(helpers):
if helper not in allowed:
self.deprecated.append(helper)
continue
functions[helper] = getattr(helpers, helper)
if helper in allowed:
allowed.remove(helper)
self.functions = functions
if allowed:
raise Exception('Template helper function(s) `%s` not defined'
% ', '.join(allowed))
# extend helper functions with ones supplied by plugins
extra_helpers = []
for plugin in p.PluginImplementations(p.ITemplateHelpers):
helpers = plugin.get_helpers()
for helper in helpers:
if helper in extra_helpers:
raise Exception('overwritting extra helper %s' % helper)
extra_helpers.append(helper)
functions[helper] = helpers[helper]
# logging
self.log = logging.getLogger('ckan.helpers')
@classmethod
def null_function(cls, *args, **kw):
''' This function is returned if no helper is found. The idea is
to try to allow templates to be rendered even if helpers are
missing. Returning the empty string seems to work well.'''
return ''
def __getattr__(self, name):
''' return the function/object requested '''
if name in self.functions:
if name in self.deprecated:
msg = 'Template helper function `%s` is deprecated' % name
self.log.warn(msg)
return self.functions[name]
else:
if name in self.deprecated:
msg = ('Template helper function `{0}` is not available '
'because it has been deprecated.'.format(name))
self.log.critical(msg)
else:
msg = 'Helper function `%s` could not be found\n ' \
'(are you missing an extension?)' % name
self.log.critical(msg)
return self.null_function
def load_environment(global_conf, app_conf):
"""Configure the Pylons environment via the ``pylons.config``
object. This code should only need to be run once.
"""
###### Pylons monkey-patch
# this must be run at a time when the env is semi-setup, thus inlined here.
# Required by the deliverance plugin and iATI
from pylons.wsgiapp import PylonsApp
import pkg_resources
find_controller_generic = PylonsApp.find_controller
# This is from pylons 1.0 source, will monkey-patch into 0.9.7
def find_controller(self, controller):
if controller in self.controller_classes:
return self.controller_classes[controller]
# Check to see if its a dotted name
if '.' in controller or ':' in controller:
mycontroller = pkg_resources \
.EntryPoint \
.parse('x=%s' % controller).load(False)
self.controller_classes[controller] = mycontroller
return mycontroller
return find_controller_generic(self, controller)
PylonsApp.find_controller = find_controller
###### END evil monkey-patch
os.environ['CKAN_CONFIG'] = global_conf['__file__']
# Pylons paths
root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
paths = dict(root=root,
controllers=os.path.join(root, 'controllers'),
static_files=os.path.join(root, 'public'),
templates=[])
# Initialize config with the basic options
config.init_app(global_conf, app_conf, package='ckan', paths=paths)
#################################################################
# #
# HORRIBLE GENSHI HACK #
# #
#################################################################
# #
# Genshi does strange things to get stuff out of the template #
# variables. This stops it from handling properties in the #
# correct way as it returns the property rather than the actual #
# value of the property. #
# #
# By overriding lookup_attr() in the LookupBase class we are #
# able to get the required behaviour. Using @property allows #
# us to move functionality out of templates whilst maintaining #
# backwards compatability. #
# #
#################################################################
'''
This code is based on Genshi code
Copyright © 2006-2012 Edgewall Software
All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, are permitted provided that the following
conditions are met:
Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
The name of the author may not be used to endorse or promote
products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
'''
from genshi.template.eval import LookupBase
@classmethod
def genshi_lookup_attr(cls, obj, key):
__traceback_hide__ = True
try:
val = getattr(obj, key)
except AttributeError:
if hasattr(obj.__class__, key):
raise
else:
try:
val = obj[key]
except (KeyError, TypeError):
val = cls.undefined(key, owner=obj)
if isinstance(val, property):
val = val.fget()
return val
setattr(LookupBase, 'lookup_attr', genshi_lookup_attr)
del genshi_lookup_attr
del LookupBase
#################################################################
# #
# END OF GENSHI HACK #
# #
#################################################################
# Setup the SQLAlchemy database engine
# Suppress a couple of sqlalchemy warnings
msgs = ['^Unicode type received non-unicode bind param value',
"^Did not recognize type 'BIGINT' of column 'size'",
"^Did not recognize type 'tsvector' of column 'search_vector'"
]
for msg in msgs:
warnings.filterwarnings('ignore', msg, sqlalchemy.exc.SAWarning)
# load all CKAN plugins
p.load_all(config)
def update_config():
''' This code needs to be run when the config is changed to take those
changes into account. '''
for plugin in p.PluginImplementations(p.IConfigurer):
# must do update in place as this does not work:
# config = plugin.update_config(config)
plugin.update_config(config)
root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# This is set up before globals are initialized
site_id = os.environ.get('CKAN_SITE_ID')
if site_id:
config['ckan.site_id'] = site_id
site_url = config.get('ckan.site_url', '')
ckan_host = config['ckan.host'] = urlparse(site_url).netloc
if config.get('ckan.site_id') is None:
if ':' in ckan_host:
ckan_host, port = ckan_host.split(':')
assert ckan_host, 'You need to configure ckan.site_url or ' \
'ckan.site_id for SOLR search-index rebuild to work.'
config['ckan.site_id'] = ckan_host
# ensure that a favicon has been set
favicon = config.get('ckan.favicon', '/images/icons/ckan.ico')
config['ckan.favicon'] = favicon
# Init SOLR settings and check if the schema is compatible
#from ckan.lib.search import SolrSettings, check_solr_schema_version
# lib.search is imported here as we need the config enabled and parsed
search.SolrSettings.init(config.get('solr_url'),
config.get('solr_user'),
config.get('solr_password'))
search.check_solr_schema_version()
routes_map = routing.make_map()
config['routes.map'] = routes_map
# The RoutesMiddleware needs its mapper updating if it exists
if 'routes.middleware' in config:
config['routes.middleware'].mapper = routes_map
config['routes.named_routes'] = routing.named_routes
config['pylons.app_globals'] = app_globals.app_globals
# initialise the globals
config['pylons.app_globals']._init()
# add helper functions
helpers = _Helpers(h)
config['pylons.h'] = helpers
## redo template setup to use genshi.search_path
## (so remove std template setup)
legacy_templates_path = os.path.join(root, 'templates_legacy')
jinja2_templates_path = os.path.join(root, 'templates')
if asbool(config.get('ckan.legacy_templates', 'no')):
# We want the new template path for extra snippets like the
# dataviewer and also for some testing stuff
template_paths = [legacy_templates_path, jinja2_templates_path]
else:
template_paths = [jinja2_templates_path, legacy_templates_path]
extra_template_paths = config.get('extra_template_paths', '')
if extra_template_paths:
# must be first for them to override defaults
template_paths = extra_template_paths.split(',') + template_paths
config['pylons.app_globals'].template_paths = template_paths
# Translator (i18n)
translator = Translator(pylons.translator)
def template_loaded(template):
translator.setup(template)
# Markdown ignores the logger config, so to get rid of excessive
# markdown debug messages in the log, set it to the level of the
# root logger.
logging.getLogger("MARKDOWN").setLevel(logging.getLogger().level)
# Create the Genshi TemplateLoader
config['pylons.app_globals'].genshi_loader = TemplateLoader(
template_paths, auto_reload=True, callback=template_loaded)
# Create Jinja2 environment
env = jinja_extensions.Environment(
loader=jinja_extensions.CkanFileSystemLoader(template_paths),
autoescape=True,
extensions=['jinja2.ext.do', 'jinja2.ext.with_',
jinja_extensions.SnippetExtension,
jinja_extensions.CkanExtend,
jinja_extensions.CkanInternationalizationExtension,
jinja_extensions.LinkForExtension,
jinja_extensions.ResourceExtension,
jinja_extensions.UrlForStaticExtension,
jinja_extensions.UrlForExtension]
)
env.install_gettext_callables(_, ungettext, newstyle=True)
# custom filters
env.filters['empty_and_escape'] = jinja_extensions.empty_and_escape
env.filters['truncate'] = jinja_extensions.truncate
config['pylons.app_globals'].jinja_env = env
# CONFIGURATION OPTIONS HERE (note: all config options will override
# any Pylons config options)
ckan_db = os.environ.get('CKAN_DB')
if ckan_db:
config['sqlalchemy.url'] = ckan_db
# for postgresql we want to enforce utf-8
sqlalchemy_url = config.get('sqlalchemy.url', '')
if sqlalchemy_url.startswith('postgresql://'):
extras = {'client_encoding': 'utf8'}
else:
extras = {}
engine = sqlalchemy.engine_from_config(config, 'sqlalchemy.', **extras)
if not model.meta.engine:
model.init_model(engine)
for plugin in p.PluginImplementations(p.IConfigurable):
plugin.configure(config)
# reset the template cache - we do this here so that when we load the
# environment it is clean
render.reset_template_info_cache()
# clear other caches
logic.clear_actions_cache()
new_authz.clear_auth_functions_cache()
# Here we create the site user if they are not already in the database
try:
logic.get_action('get_site_user')({'ignore_auth': True}, None)
except sqlalchemy.exc.ProgrammingError:
# The database is not initialised. This is a bit dirty.
pass
except sqlalchemy.exc.InternalError:
# The database is not initialised. Travis hits this
pass
# if an extension or our code does not finish
# transaction properly db cli commands can fail
model.Session.remove()