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A minimal migration tool for PHP.
stepper is a minimalistic migration tool., (*1)
In order to use stepper, you need at least one Step defining what should happen when the the Step is executed and also whether and how it can be undone., (*2)
class MyFirstStep implements Step {
public function up() {
// does something
}
public function down() {
// undoes something
}
public function canBeUndone() {
return true;
}
public function next() {}
}
With this one Step and a file (e.g. migration.state) to store the current state in, you can start the Stepper:, (*3)
$app = new CliApplication(new StepperCommand(new StepOne(), 'migration.state')); $app->run();
That's it. You can now execute the Step with php myScript.php. If you add a second Step later, make sure that the first Step
returns it in it's next method:, (*4)
public function next() {
return new AnotherStep();
}
If you run php myScript.php now, only AnotherStep gets executed since the fact that the first Step already has been executed
has been saved in migration.state., (*5)
If you want to revert whatever AnotherStep did you can run php myScript.php --to=MyFirstStep which will execute the down function
of AnotherStep. This won't work if AnotherStep::canBeUndone returns false., (*6)
For a detailed documentation, check out the test suite., (*7)
A minimal migration tool for PHP.
MIT
migration watoki