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Copyright (c) 2015 Baleen Migrations Project (Mike Simonson & Gabriel Somoza) | ||
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Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
this software and associated documentation files (the "Software"), to deal in | ||
the Software without restriction, including without limitation the rights to | ||
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies | ||
of the Software, and to permit persons to whom the Software is furnished to do | ||
so, subject to the following conditions: | ||
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The above copyright notice and this permission notice shall be included in all | ||
copies or substantial portions of the Software. | ||
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
SOFTWARE. |
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Status | ||
====== | ||
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**NB!:** This project is still an early release. Please do not use in | ||
production-critical environments. We do not guarantee the safety of your data - use | ||
at your own risk. | ||
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Introduction | ||
====== | ||
Baleen Migrations is a project that seeks to abstract the domain logic of performing migrations of any kind into a | ||
single package. Its simple goal is to excel at one single task: provide an intuitive, well-tested framework to migrate | ||
from point A to point B (or vice-versa if going down). | ||
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In other words, we take care of WHICH migrations are run and in what ORDER. Everything else is left up to the | ||
implementation: | ||
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* WHAT is going to be migrated? It could be a database, images, documents, etc. | ||
* HOW its going to be migrated? You can wrap each migration into DB transactions. Or not, its up to you. | ||
* What to do when a migration fails? We'll let you know WHEN it happens, but its up to you to the implementation to | ||
decide what to do (e.g. cancel the transaction). | ||
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Installation (Composer) | ||
======================= | ||
Installation with Composer is simple: | ||
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composer install baleen/migrations:^0.1 | ||
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Example | ||
======= | ||
Given the following migrations available in a system: | ||
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```php | ||
use Baleen\Migration\MigrationInterface; | ||
use Baleen\Migration\RunOptions; | ||
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/** | ||
* FILE: ./migrations/AbstractPDOMigration.php | ||
* | ||
* You can be as creative as you want here. The only requirement here is to implement | ||
* MigrationInterface. | ||
*/ | ||
class AbstractPDOMigration implements MigrationInterface | ||
{ | ||
protected $connection; // gets set on the constructor | ||
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/** @var RunOptions **/ | ||
protected $options; | ||
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public function begin() { | ||
$this->connection->beginTransaction(); | ||
} | ||
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public function finish() { | ||
$this->connection->commit(); | ||
} | ||
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public function abort() { | ||
$this->connection->rollBack(); | ||
} | ||
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public function setOptions(RunOptions $options) { | ||
$this->options = $options; | ||
} | ||
} | ||
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// FILE: ./migrations/v001_AddHireDateToStaff.php | ||
class v001_AddHireDateToStaff extends AbstractPDOMigration | ||
{ | ||
public function up() { | ||
$this->connection->exec("ALTER TABLE staff ADD hire_date date"); | ||
} | ||
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public function down() { | ||
$this->connection->exec("ALTER TABLE staff ADD hire_date date"); | ||
} | ||
} | ||
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// FILE: ./migrations/v002_SeedJoeBloggs.php | ||
class v002_SeedJoeBloggs extends AbstractPDOMigration | ||
{ | ||
public function up() { | ||
$this->connection->exec( | ||
"INSERT INTO staff (id, first, last) VALUES (23, 'Joe', 'Bloggs')" | ||
); | ||
} | ||
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public function down() { | ||
$this->connection->exec("DELETE FROM staff WHERE id = 23"); | ||
} | ||
} | ||
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// ... etc - for the purposes of this example imagine there are 100 migrations | ||
``` | ||
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Here's what Baleen Migrations can do: | ||
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```php | ||
#!/bin/env/php | ||
// FILE: run_migrations.php | ||
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require __DIR__ . '/vendor/autoload.php'; | ||
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// The repository is in charge of loading all available migrations. | ||
$repository = new DirectoryRepository(__DIR__ . '/migrations'); | ||
$availableMigrations = $repository->getAllAvailableMigrations(); | ||
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/* The storage is in charge of knowing which versions have already been run. | ||
Here we're loading from a file, but it could also be a DB table, API call, etc. */ | ||
$storage = new FileStorage(__DIR__ . '/versions.txt'); | ||
$alreadyRun = $storage->readMigratedVersions(); | ||
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/* The timeline is in charge of ordering migrations and running them based on their | ||
status */ | ||
$timeline = new Timeline($availableMigrations, $alreadyRun); | ||
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// Say we want to make sure all migrations up to and including v015 are UP: | ||
$timeline->upTowards('v015'); | ||
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// Now lets revert all migrations down to 13 (inclusive) | ||
$timeline->downTowards('v013'); // will revert 15, 14 and 13 - in that order | ||
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/* You can also run a single migration in any direction and pass custom arguments | ||
to the Migration. */ | ||
use Baleen\Migration\RunOptions; | ||
$options = new RunOptions(RunOptions::UP); | ||
$options->setCustom([ | ||
'notifyEmail' => 'jon@doe.me', | ||
]); | ||
$timeline->runSingle('v100', $options); | ||
/* Version 'v100' will receive an instance of RunOptions through the setOptions | ||
method. You can also pass RunOptions to most of the other Timeline methods. */ | ||
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``` | ||
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Documentation | ||
============= | ||
For more documentation please refer to the docs directory (TODO). | ||
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Contributing | ||
============ | ||
See CONTRIBUTING.md | ||
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LICENSE | ||
======= | ||
MIT - for more details please refer to [LICENSE](https://github.com/baleen/migrations/blob/master/LICENSE) at the root | ||
directory. | ||
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### About the name | ||
We named the project ("BALEEN") after a family (or "parvorders" to be precise) of whales that are famous for migrating | ||
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long distances. The humpback whale, for example, travels as far as 16,000 miles (25749.5 km) annually. That's about | ||
twice the earth's diameter. |
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Nice!