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epriestley 087cc0808a Make SQL patch management DAG-based and provide namespace support
Summary:
This addresses three issues with the current patch management system:

  # Two people developing at the same time often pick the same SQL patch number, and then have to go rename it. The system catches this, but it's silly.
  # Second/third-party developers can't use the same system to manage auxiliary storage they may want to add.
  # There's no way to build mock databases for unit tests that need to do reads.

To resolve these things, you can now name your patches whatever you want and conflicts are just merge conflicts, which are less of a pain to fix than filename conflicts.

Dependencies are now a DAG, with implicit dependencies created on the prior patch if no dependencies are specified. Developers can add new concrete subclasses of `PhabricatorSQLPatchList` to add storage management, and define the dependency branchpoint of their patches so they apply in the correct order (although, generally, they should not depend on the mainline patches, presumably).

The commands `storage upgrade --namespace test1234` and `storage destroy --namespace test1234` will allow unit tests to build and destroy MySQL storage.

A "quickstart" mode allows an upgrade from scratch in ~1200ms. Destruction takes about 200ms. These seem like fairily reasonable costs to actually use in tests. Building from scratch patch-by-patch takes about 6000ms.

Test Plan:
  - Created new databases from scratch with and without quickstart in a separate test namespace. Pointed the webapp at the test namespaces, browsed around, everything looked good.
  - Compared quickstart and no-quickstart dump states, they're identical except for mysqldump timestamps and a few similar things.
  - Upgraded a legacy database to the new storage format.
  - Destroyed / dumped storage.

Reviewers: edward, vrana, btrahan, jungejason

Reviewed By: btrahan

CC: aran, nh

Maniphest Tasks: T140, T345

Differential Revision: https://secure.phabricator.com/D2323
2012-04-30 07:54:00 -07:00
bin Make SQL patch management DAG-based and provide namespace support 2012-04-30 07:54:00 -07:00
conf Use a disk-based default avatar, not a database-based one 2012-04-27 17:44:10 -07:00
externals Support IE8 2012-04-17 11:01:30 -07:00
resources SQL Patch Management: SQL Changes 2012-04-30 07:53:53 -07:00
scripts Make SQL patch management DAG-based and provide namespace support 2012-04-30 07:54:00 -07:00
src Make SQL patch management DAG-based and provide namespace support 2012-04-30 07:54:00 -07:00
support/aphlict Make Aphlict client somewhat more approachable 2012-03-06 20:14:03 -08:00
webroot Highlight copied/moved lines in Differential 2012-04-28 21:46:31 -07:00
.arcconfig Add a custom lint name hook to Phabricator 2011-08-31 13:49:30 -07:00
.divinerconfig Fix line links to source codes of generated documentation 2012-04-10 11:31:52 -07:00
.gitignore Fix whitespace 2012-04-06 01:00:32 -07:00
.gitmodules Just change the location. 2011-05-28 15:14:54 -07:00
README Add a roadmap document and update the README. 2011-06-29 09:38:03 -07:00

Phabricator is a open source collection of web applications which make it easier
to write, review, and share source code. Phabricator was developed at Facebook.

This is an early release. It's pretty high-quality and usable, but under
active development so things may change quickly.

You can learn more about the project and find links to documentation and
resources at: http://phabricator.org/

LICENSE

Phabricator is released under the Apache 2.0 license except as otherwise noted.
http://www.apache.org/licenses/LICENSE-2.0