corehq

A few broad areas of functionality are stored directly in this directory.

apps

Most functionality lives in this directory. See README in this directory for details.

blobs

The blob db stores large pieces of binary data. It's where form XML, multimedia, exports, temporary files, etc. are stored.

celery_monitoring

Tools to monitor Celery, which we use for async task processing.

couchapps

Certain couch views are stored here, instead of inside the relevant django app, because storing them separately gives us performance benefits.

dbaccessors

Part of couchapps

ex-submodules

Assorted functionality that used to live in separate repositories. See README in this directory for details.

extensions

Framework for extending HQ functionality in a fork-like way. Used to handle code specific to ICDS-CAS.

form_processor

Code to handle receiving, processing, and storing form submissions from CommCare mobile and Web Apps.

messaging

Code to manage direct-to-user messages in CommCare HQ, most often SMS but also channels like email and whatsapp. Also see the sms and smsforms apps in corehq.apps.

motech

MOTECH is CommCare HQ's integration layer, and allows HQ to forward data to remote systems' APIs, to import data from them, and to follow workflows for more complex integrations with systems like OpenMRS and DHIS2.

pillows

HQ-specific mappings that use the pillowtop framework in ex-submodules.

preindex

Code for handling preindexing, which updates CouchDB views and ElasticSearch indices. Preindex is run as part of deploy and can also be run ad hoc.

privileges.py

Privileges allow HQ to limit functionality based on software plan.

project_limits

Framework for throttling actions like form submissions on a domain-specific basis.

sql_accessors

Stores custom postgres functions.

sql_db

Code related to partitioning postgres.

sql_proxy_accessors

Stores custom postgres functions that use PL/Proxy.

sql_proxy_standby_accessors

Stores custom postgres functions relevant to standby servers.

tabs

Menu structure for CommCare HQ.

tests

Contains a few tests for high-level functionality like locks, as well as tooling to run tests with nose, an extension of unittest.

toggles.py

Toggles allow limiting functionality based on user or domain. Also see ex-submodules/toggle and corehq.apps.toggle_ui.

util

Miscellaneous utilities. Also see ex-submodules/dimagi.