Fix circular dependencies in migrator

.drone.yml

@@ -103,10 +103,19 @@ steps:
       event:
         exclude: tag
 
-  - name: build module
+  - name: Install dependencies
     image: glmdev/node-pnpm:latest
     commands:
       - pnpm i
+
+  - name: Lint code
+    image: glmdev/node-pnpm:latest
+    commands:
+      - pnpm lint
+
+  - name: build module
+    image: glmdev/node-pnpm:latest
+    commands:
       - pnpm build
       - mkdir artifacts
       - tar czf artifacts/extollo-lib.tar.gz lib

.idea/codeStyles/Project.xml

@@ -0,0 +1,55 @@
+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <JSCodeStyleSettings version="0">
+      <option name="USE_SEMICOLON_AFTER_STATEMENT" value="false" />
+      <option name="FORCE_SEMICOLON_STYLE" value="true" />
+      <option name="USE_DOUBLE_QUOTES" value="false" />
+      <option name="FORCE_QUOTE_STYlE" value="true" />
+      <option name="ENFORCE_TRAILING_COMMA" value="WhenMultiline" />
+      <option name="OBJECT_LITERAL_WRAP" value="2" />
+    </JSCodeStyleSettings>
+    <TypeScriptCodeStyleSettings version="0">
+      <option name="USE_SEMICOLON_AFTER_STATEMENT" value="false" />
+      <option name="FORCE_SEMICOLON_STYLE" value="true" />
+      <option name="USE_DOUBLE_QUOTES" value="false" />
+      <option name="FORCE_QUOTE_STYlE" value="true" />
+      <option name="ENFORCE_TRAILING_COMMA" value="WhenMultiline" />
+      <option name="OBJECT_LITERAL_WRAP" value="2" />
+    </TypeScriptCodeStyleSettings>
+    <editorconfig>
+      <option name="ENABLED" value="false" />
+    </editorconfig>
+    <codeStyleSettings language="JavaScript">
+      <option name="INDENT_CASE_FROM_SWITCH" value="false" />
+      <option name="ALIGN_MULTILINE_PARAMETERS" value="false" />
+      <option name="ALIGN_MULTILINE_FOR" value="false" />
+      <option name="METHOD_CALL_CHAIN_WRAP" value="2" />
+      <option name="IF_BRACE_FORCE" value="3" />
+      <option name="DOWHILE_BRACE_FORCE" value="3" />
+      <option name="WHILE_BRACE_FORCE" value="3" />
+      <option name="FOR_BRACE_FORCE" value="3" />
+    </codeStyleSettings>
+    <codeStyleSettings language="PHP">
+      <indentOptions>
+        <option name="USE_TAB_CHARACTER" value="true" />
+        <option name="SMART_TABS" value="true" />
+      </indentOptions>
+    </codeStyleSettings>
+    <codeStyleSettings language="Shell Script">
+      <indentOptions>
+        <option name="INDENT_SIZE" value="4" />
+        <option name="TAB_SIZE" value="4" />
+      </indentOptions>
+    </codeStyleSettings>
+    <codeStyleSettings language="TypeScript">
+      <option name="INDENT_CASE_FROM_SWITCH" value="false" />
+      <option name="ALIGN_MULTILINE_PARAMETERS" value="false" />
+      <option name="ALIGN_MULTILINE_FOR" value="false" />
+      <option name="METHOD_CALL_CHAIN_WRAP" value="2" />
+      <option name="IF_BRACE_FORCE" value="3" />
+      <option name="DOWHILE_BRACE_FORCE" value="3" />
+      <option name="WHILE_BRACE_FORCE" value="3" />
+      <option name="FOR_BRACE_FORCE" value="3" />
+    </codeStyleSettings>
+  </code_scheme>
+</component>

.idea/codeStyles/codeStyleConfig.xml

@@ -0,0 +1,5 @@
+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="USE_PER_PROJECT_SETTINGS" value="true" />
+  </state>
+</component>

.idea/dataSources.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
+    <data-source source="LOCAL" name="mongo@localhost" uuid="b05ce3f5-fadc-47d6-8621-e232ed1ad2f3">
+      <driver-ref>mongo</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>com.dbschema.MongoJdbcDriver</jdbc-driver>
+      <jdbc-url>mongodb://localhost:27017/extollo_1</jdbc-url>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+    <data-source source="LOCAL" name="extollo_1@db03.platform.local" uuid="c8dc268d-b69d-497a-9e6d-b5c6e5275835">
+      <driver-ref>postgresql</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>org.postgresql.Driver</jdbc-driver>
+      <jdbc-url>jdbc:postgresql://db03.platform.local:5432/extollo_1</jdbc-url>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+  </component>
+</project>

.idea/lib.iml

@@ -4,5 +4,6 @@
     <content url="file://$MODULE_DIR$" />
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="extollo" />
   </component>
 </module>

.idea/modules.xml

@@ -2,6 +2,7 @@
 <project version="4">
   <component name="ProjectModuleManager">
     <modules>
+      <module fileurl="file://$PROJECT_DIR$/../app/.idea/extollo.iml" filepath="$PROJECT_DIR$/../app/.idea/extollo.iml" />
       <module fileurl="file://$PROJECT_DIR$/.idea/lib.iml" filepath="$PROJECT_DIR$/.idea/lib.iml" />
     </modules>
   </component>

.idea/vcs.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+    <mapping directory="" vcs="Git" />
   </component>
 </project>

src/auth/basic-ui/BasicLoginController.ts

@@ -0,0 +1,29 @@
+import {Controller} from '../../http/Controller'
+import {Injectable} from '../../di'
+import {Route} from '../../http/routing/Route'
+import {Request} from '../../http/lifecycle/Request'
+import {view} from '../../http/response/ViewResponseFactory'
+import {ResponseFactory} from '../../http/response/ResponseFactory'
+
+@Injectable()
+export class BasicLoginController extends Controller {
+    public static routes(): void {
+        Route.group('auth', () => {
+            Route.get('login', (request: Request) => {
+                const controller = <BasicLoginController> request.make(BasicLoginController)
+                return controller.getLogin()
+            })
+                .alias('@auth.login')
+
+            Route.post('login', (request: Request) => {
+                const controller = <BasicLoginController> request.make(BasicLoginController)
+                return controller.getLogin()
+            })
+                .alias('@auth.login.attempt')
+        })
+    }
+
+    public getLogin(): ResponseFactory {
+        return view('@extollo:auth:login')
+    }
+}

src/auth/index.ts

@@ -21,3 +21,4 @@ export * from './Authentication'
 export * from './config'
 
 export * from './basic-ui/BasicLoginFormRequest'
+export * from './basic-ui/BasicLoginController'

src/cli/decorators.ts

@@ -0,0 +1,23 @@
+import {ContainerBlueprint, Instantiable, isInstantiableOf} from '../di'
+import {CommandLine} from './service'
+import {Directive} from './Directive'
+import {logIfDebugging} from '../util'
+
+/**
+ * Register a class as a command-line Directive.
+ * The class must extend Directive.
+ * @constructor
+ */
+export const CLIDirective = (): ClassDecorator => {
+    return (target) => {
+        if ( isInstantiableOf(target, Directive) ) {
+            logIfDebugging('extollo.cli.decorators', 'Registering CLIDirective blueprint:', target)
+            ContainerBlueprint.getContainerBlueprint()
+                .onResolve<CommandLine>(CommandLine, cli => {
+                    cli.registerDirective(target as Instantiable<Directive>)
+                })
+        } else {
+            logIfDebugging('extollo.cli.decorators', 'Skipping CLIDirective blueprint:', target)
+        }
+    }
+}

src/di/Container.ts

@@ -1,4 +1,4 @@
-import {DependencyKey, InstanceRef, Instantiable, isInstantiable, StaticClass} from './types'
+import {DependencyKey, InstanceRef, Instantiable, isInstantiable, StaticClass, TypedDependencyKey} from './types'
 import {AbstractFactory} from './factory/AbstractFactory'
 import {collect, Collection, globalRegistry, logIfDebugging} from '../util'
 import {Factory} from './factory/Factory'
@@ -7,7 +7,7 @@ import {ClosureFactory} from './factory/ClosureFactory'
 import NamedFactory from './factory/NamedFactory'
 import SingletonFactory from './factory/SingletonFactory'
 import {InvalidDependencyKeyError} from './error/InvalidDependencyKeyError'
-import {ContainerBlueprint} from './ContainerBlueprint'
+import {ContainerBlueprint, ContainerResolutionCallback} from './ContainerBlueprint'
 
 export type MaybeFactory<T> = AbstractFactory<T> | undefined
 export type MaybeDependency = any | undefined
@@ -17,18 +17,36 @@ export type ResolvedDependency = { paramIndex: number, key: DependencyKey, resol
  * A container of resolve-able dependencies that are created via inversion-of-control.
  */
 export class Container {
+    /**
+     * Given a Container instance, apply the ContainerBlueprint to it.
+     * @param container
+     */
+    public static realizeContainer<T extends Container>(container: T): T {
+        ContainerBlueprint.getContainerBlueprint()
+            .resolve()
+            .map(factory => container.registerFactory(factory))
+
+        ContainerBlueprint.getContainerBlueprint()
+            .resolveConstructable()
+            .map((factory: StaticClass<AbstractFactory<any>, any>) => container.registerFactory(container.make(factory)))
+
+        ContainerBlueprint.getContainerBlueprint()
+            .resolveResolutionCallbacks()
+            .map((listener: {key: TypedDependencyKey<any>, callback: ContainerResolutionCallback<any>}) => {
+                container.onResolve(listener.key)
+                    .then(value => listener.callback(value))
+            })
+
+        return container
+    }
+
     /**
      * Get the global instance of this container.
      */
     public static getContainer(): Container {
         const existing = <Container | undefined> globalRegistry.getGlobal('extollo/injector')
         if ( !existing ) {
-            const container = new Container()
-
-            ContainerBlueprint.getContainerBlueprint()
-                .resolve()
-                .map(factory => container.registerFactory(factory))
-
+            const container = Container.realizeContainer(new Container())
             globalRegistry.setGlobal('extollo/injector', container)
             return container
         }
@@ -48,6 +66,12 @@ export class Container {
      */
     protected instances: Collection<InstanceRef> = new Collection<InstanceRef>()
 
+    /**
+     * Collection of callbacks waiting for a dependency key to be resolved.
+     * @protected
+     */
+    protected waitingResolveCallbacks: Collection<{ key: DependencyKey, callback: (t: unknown) => unknown }> = new Collection<{key: DependencyKey; callback:(t: unknown) => unknown}>();
+
     constructor() {
         this.registerSingletonInstance<Container>(Container, this)
         this.registerSingleton('injector', this)
@@ -172,6 +196,26 @@ export class Container {
         return this.instances.where('key', '=', key).isNotEmpty()
     }
 
+    /**
+     * Get a Promise that resolves the first time the given dependency key is resolved
+     * by the application. If it has already been resolved, the Promise will resolve immediately.
+     * @param key
+     */
+    onResolve<T>(key: TypedDependencyKey<T>): Promise<T> {
+        if ( this.hasInstance(key) ) {
+            return new Promise<T>(res => res(this.make<T>(key)))
+        }
+
+        // Otherwise, we haven't instantiated an instance with this key yet,
+        // so put it onto the waitlist.
+        return new Promise<T>(res => {
+            this.waitingResolveCallbacks.push({
+                key,
+                callback: (res as (t: unknown) => unknown),
+            })
+        })
+    }
+
     /**
      * Returns true if the container has a factory for the given key.
      * @param {DependencyKey} key
@@ -234,6 +278,15 @@ export class Container {
             value: newInstance,
         })
 
+        this.waitingResolveCallbacks = this.waitingResolveCallbacks.filter(waiter => {
+            if ( waiter.key === key ) {
+                waiter.callback(newInstance)
+                return false
+            }
+
+            return true
+        })
+
         return newInstance
     }
 

src/di/ContainerBlueprint.ts

@@ -1,9 +1,19 @@
-import {DependencyKey, Instantiable} from './types'
+import {DependencyKey, Instantiable, StaticClass, TypedDependencyKey} from './types'
 import NamedFactory from './factory/NamedFactory'
 import {AbstractFactory} from './factory/AbstractFactory'
 import {Factory} from './factory/Factory'
 import {ClosureFactory} from './factory/ClosureFactory'
 
+/** Simple type alias for a callback to a container's onResolve method. */
+export type ContainerResolutionCallback<T> = (() => unknown) | ((t: T) => unknown)
+
+/**
+ * Blueprint for newly-created containers.
+ *
+ * This is used to allow global helpers like `@Singleton()`
+ * or `@CLIDirective()` while still supporting multiple
+ * global Container instances at once.
+ */
 export class ContainerBlueprint {
     private static instance?: ContainerBlueprint
 
@@ -17,6 +27,19 @@ export class ContainerBlueprint {
 
     protected factories: (() => AbstractFactory<any>)[] = []
 
+    protected constructableFactories: StaticClass<AbstractFactory<any>, any>[] = []
+
+    protected resolutionCallbacks: ({key: TypedDependencyKey<any>, callback: ContainerResolutionCallback<any>})[] = []
+
+    /**
+     * Register some factory class with the container. Should take no construction params.
+     * @param factory
+     */
+    registerFactory(factory: StaticClass<AbstractFactory<any>, any>): this {
+        this.constructableFactories.push(factory)
+        return this
+    }
+
     /**
      * Register a basic instantiable class as a standard Factory with this container,
      * identified by a string name rather than static class.
@@ -47,7 +70,38 @@ export class ContainerBlueprint {
         return this
     }
 
+    /**
+     * Get an array of factory instances in the blueprint.
+     */
     resolve(): AbstractFactory<any>[] {
         return this.factories.map(x => x())
     }
+
+    /**
+     * Register an onResolve callback to be added to all newly-created containers.
+     * @param key
+     * @param callback
+     */
+    onResolve<T>(key: TypedDependencyKey<T>, callback: ContainerResolutionCallback<T>): this {
+        this.resolutionCallbacks.push({
+            key,
+            callback,
+        })
+        return this
+    }
+
+    /**
+     * Get an array of static Factory classes that need to be instantiated by
+     * the container itself.
+     */
+    resolveConstructable(): StaticClass<AbstractFactory<any>, any> {
+        return [...this.constructableFactories]
+    }
+
+    /**
+     * Get an array of DependencyKey-callback pairs to register with new containers.
+     */
+    resolveResolutionCallbacks(): ({key: TypedDependencyKey<any>, callback: ContainerResolutionCallback<any>})[] {
+        return [...this.resolutionCallbacks]
+    }
 }

src/di/decorator/injection.ts

@@ -1,5 +1,5 @@
 import 'reflect-metadata'
-import {collect, Collection} from '../../util'
+import {collect, Collection, logIfDebugging} from '../../util'
 import {
     DependencyKey,
     DependencyRequirement,
@@ -71,9 +71,10 @@ export const Injectable = (): ClassDecorator => {
  * If a `key` is specified, that DependencyKey will be injected.
  * Otherwise, the DependencyKey is inferred from the type annotation.
  * @param key
+ * @param debug
  * @constructor
  */
-export const Inject = (key?: DependencyKey): PropertyDecorator => {
+export const Inject = (key?: DependencyKey, { debug = false } = {}): PropertyDecorator => {
     return (target, property) => {
         let propertyMetadata = Reflect.getMetadata(DEPENDENCY_KEYS_PROPERTY_METADATA_KEY, target?.constructor || target) as Collection<PropertyDependency>
         if ( !propertyMetadata ) {
@@ -91,11 +92,18 @@ export const Inject = (key?: DependencyKey): PropertyDecorator => {
             if ( existing ) {
                 existing.key = key
             } else {
-                propertyMetadata.push({ property,
-                    key })
+                propertyMetadata.push({
+                    property,
+                    key,
+                    debug,
+                })
             }
         }
 
+        if ( debug ) {
+            logIfDebugging('extollo.di.decoration', '[DEBUG] @Inject() - key:', key, 'property:', property, 'target:', target, 'target constructor:', target?.constructor, 'type:', type)
+        }
+
         Reflect.defineMetadata(DEPENDENCY_KEYS_PROPERTY_METADATA_KEY, propertyMetadata, target?.constructor || target)
     }
 }
@@ -152,3 +160,15 @@ export const Singleton = (name?: string): ClassDecorator => {
         }
     }
 }
+
+/**
+ * Register a factory class directly with any created containers.
+ * @constructor
+ */
+export const FactoryProducer = (): ClassDecorator => {
+    return (target) => {
+        if ( isInstantiable(target) ) {
+            ContainerBlueprint.getContainerBlueprint().registerFactory(target)
+        }
+    }
+}

src/di/types.ts

@@ -23,6 +23,16 @@ export function isInstantiable<T>(what: unknown): what is Instantiable<T> {
     )
 }
 
+/**
+ * Returns true if the given value is instantiable and, once instantiated,
+ * will create an instance of the given static class.
+ * @param what
+ * @param type
+ */
+export function isInstantiableOf<T>(what: unknown, type: StaticClass<T, any>): what is Instantiable<T> {
+    return isInstantiable(what) && what.prototype instanceof type
+}
+
 /**
  * Type that identifies a value as a static class, even if it is not instantiable.
  */
@@ -41,6 +51,11 @@ export function isStaticClass<T, T2>(something: unknown): something is StaticCla
  */
 export type DependencyKey = Instantiable<any> | StaticClass<any, any> | string
 
+/**
+ * A DependencyKey, but typed
+ */
+export type TypedDependencyKey<T> = Instantiable<T> | StaticClass<T, any> | string
+
 /**
  * Interface used to store dependency requirements by their place in the injectable
  * target's parameters.
@@ -58,6 +73,7 @@ export interface DependencyRequirement {
 export interface PropertyDependency {
     key: DependencyKey,
     property: string | symbol,
+    debug?: boolean,
 }
 
 /**

src/lifecycle/Application.ts

@@ -1,4 +1,4 @@
-import {Container, ContainerBlueprint} from '../di'
+import {Container} from '../di'
 import {
     ErrorWithContext,
     globalRegistry,
@@ -9,7 +9,6 @@ import {
     universalPath,
     UniversalPath,
 } from '../util'
-
 import {Logging} from '../service/Logging'
 import {RunLevelErrorHandler} from './RunLevelErrorHandler'
 import {Unit, UnitStatus} from './Unit'
@@ -58,12 +57,7 @@ export class Application extends Container {
     public static getContainer(): Container {
         const existing = <Container | undefined> globalRegistry.getGlobal('extollo/injector')
         if ( !existing ) {
-            const container = new Application()
-
-            ContainerBlueprint.getContainerBlueprint()
-                .resolve()
-                .map(factory => container.registerFactory(factory))
-
+            const container = Application.realizeContainer(new Application())
             globalRegistry.setGlobal('extollo/injector', container)
             return container
         }
@@ -79,18 +73,12 @@ export class Application extends Container {
         if ( existing instanceof Application ) {
             return existing
         } else if ( existing ) {
-            const app = new Application()
+            const app = Application.realizeContainer(new Application())
             existing.cloneTo(app)
-
             globalRegistry.setGlobal('extollo/injector', app)
             return app
         } else {
-            const app = new Application()
-
-            ContainerBlueprint.getContainerBlueprint()
-                .resolve()
-                .map(factory => app.registerFactory(factory))
-
+            const app = Application.realizeContainer(new Application())
             globalRegistry.setGlobal('extollo/injector', app)
             return app
         }

src/orm/directive/CreateMigrationDirective.ts

@@ -2,11 +2,13 @@ import {Directive, OptionDefinition} from '../../cli'
 import {Injectable} from '../../di'
 import {stringToPascal} from '../../util'
 import {templateMigration} from '../template/migration'
+import {CLIDirective} from '../../cli/decorators'
 
 /**
  * CLI directive that creates migration classes from template.
  */
 @Injectable()
+@CLIDirective()
 export class CreateMigrationDirective extends Directive {
     getDescription(): string {
         return 'create a new migration'

src/orm/directive/MigrateDirective.ts

@@ -1,18 +1,20 @@
 import {Directive, OptionDefinition} from '../../cli'
 import {Container, Inject, Injectable} from '../../di'
 import {EventBus} from '../../event/EventBus'
-import {Migrator} from '../migrations/Migrator'
 import {Migrations} from '../services/Migrations'
-// import {ApplyingMigrationEvent} from '../migrations/events/ApplyingMigrationEvent'
-// import {AppliedMigrationEvent} from '../migrations/events/AppliedMigrationEvent'
+import {Migrator} from '../migrations/Migrator'
+import {ApplyingMigrationEvent} from '../migrations/events/ApplyingMigrationEvent'
+import {AppliedMigrationEvent} from '../migrations/events/AppliedMigrationEvent'
 import {EventSubscription} from '../../event/types'
 import {NothingToMigrateError} from '../migrations/NothingToMigrateError'
+import {CLIDirective} from '../../cli/decorators'
 
 /**
  * CLI directive that applies migrations using the default Migrator.
  * @fixme Support dry run mode
  */
 @Injectable()
+@CLIDirective()
 export class MigrateDirective extends Directive {
     @Inject()
     protected readonly bus!: EventBus
@@ -100,13 +102,13 @@ export class MigrateDirective extends Directive {
      * @protected
      */
     protected async registerListeners(): Promise<void> {
-        // this.subscriptions.push(await this.bus.subscribe(ApplyingMigrationEvent, event => {
-        //     this.info(`Applying migration ${event.migration.identifier}...`)
-        // }))
-        //
-        // this.subscriptions.push(await this.bus.subscribe(AppliedMigrationEvent, event => {
-        //     this.success(`Applied migration: ${event.migration.identifier}`)
-        // }))
+        this.subscriptions.push(await this.bus.subscribe(ApplyingMigrationEvent, event => {
+            this.info(`Applying migration ${event.migration.identifier}...`)
+        }))
+
+        this.subscriptions.push(await this.bus.subscribe(AppliedMigrationEvent, event => {
+            this.success(`Applied migration: ${event.migration.identifier}`)
+        }))
     }
 
     /** Remove event bus listeners before finish. */

src/orm/directive/RollbackDirective.ts

@@ -3,16 +3,18 @@ import {Container, Inject, Injectable} from '../../di'
 import {EventBus} from '../../event/EventBus'
 import {Migrator} from '../migrations/Migrator'
 import {Migrations} from '../services/Migrations'
-// import {RollingBackMigrationEvent} from '../migrations/events/RollingBackMigrationEvent'
-// import {RolledBackMigrationEvent} from '../migrations/events/RolledBackMigrationEvent'
+import {RollingBackMigrationEvent} from '../migrations/events/RollingBackMigrationEvent'
+import {RolledBackMigrationEvent} from '../migrations/events/RolledBackMigrationEvent'
 import {EventSubscription} from '../../event/types'
 import {NothingToMigrateError} from '../migrations/NothingToMigrateError'
+import {CLIDirective} from '../../cli/decorators'
 
 /**
  * CLI directive that undoes applied migrations using the default Migrator.
  * @fixme Support dry run mode
  */
 @Injectable()
+@CLIDirective()
 export class RollbackDirective extends Directive {
     @Inject()
     protected readonly bus!: EventBus
@@ -85,13 +87,13 @@ export class RollbackDirective extends Directive {
      * @protected
      */
     protected async registerListeners(): Promise<void> {
-        // this.subscriptions.push(await this.bus.subscribe(RollingBackMigrationEvent, event => {
-        //     this.info(`Rolling-back migration ${event.migration.identifier}...`)
-        // }))
-        //
-        // this.subscriptions.push(await this.bus.subscribe(RolledBackMigrationEvent, event => {
-        //     this.success(`Rolled-back migration: ${event.migration.identifier}`)
-        // }))
+        this.subscriptions.push(await this.bus.subscribe(RollingBackMigrationEvent, event => {
+            this.info(`Rolling-back migration ${event.migration.identifier}...`)
+        }))
+
+        this.subscriptions.push(await this.bus.subscribe(RolledBackMigrationEvent, event => {
+            this.success(`Rolled-back migration: ${event.migration.identifier}`)
+        }))
     }
 
     /** Remove event bus listeners before finish. */

src/orm/index.ts

@@ -30,6 +30,8 @@ export * from './schema/TableBuilder'
 export * from './schema/Schema'
 export * from './schema/PostgresSchema'
 
+export * from './services/Migrations'
+export * from './migrations/Migrator'
 export * from './migrations/NothingToMigrateError'
 export * from './migrations/events/MigrationEvent'
 export * from './migrations/events/ApplyingMigrationEvent'
@@ -37,13 +39,11 @@ export * from './migrations/events/AppliedMigrationEvent'
 export * from './migrations/events/RollingBackMigrationEvent'
 export * from './migrations/events/RolledBackMigrationEvent'
 export * from './migrations/Migration'
-export * from './migrations/Migrator'
 export * from './migrations/MigratorFactory'
 export * from './migrations/DatabaseMigrator'
 
 export * from './services/Database'
 export * from './services/Models'
-export * from './services/Migrations'
 
 export * from './directive/CreateMigrationDirective'
 export * from './directive/MigrateDirective'

src/orm/migrations/Migrator.ts

@@ -3,10 +3,10 @@ import {Awaitable, collect, ErrorWithContext} from '../../util'
 import {Migration} from './Migration'
 import {Migrations} from '../services/Migrations'
 import {EventBus} from '../../event/EventBus'
-// import {ApplyingMigrationEvent} from './events/ApplyingMigrationEvent'
-// import {AppliedMigrationEvent} from './events/AppliedMigrationEvent'
-// import {RollingBackMigrationEvent} from './events/RollingBackMigrationEvent'
-// import {RolledBackMigrationEvent} from './events/RolledBackMigrationEvent'
+import {ApplyingMigrationEvent} from './events/ApplyingMigrationEvent'
+import {AppliedMigrationEvent} from './events/AppliedMigrationEvent'
+import {RollingBackMigrationEvent} from './events/RollingBackMigrationEvent'
+import {RolledBackMigrationEvent} from './events/RolledBackMigrationEvent'
 import {NothingToMigrateError} from './NothingToMigrateError'
 
 /**
@@ -14,7 +14,7 @@ import {NothingToMigrateError} from './NothingToMigrateError'
  */
 @Injectable()
 export abstract class Migrator {
-    @Inject()
+    @Inject(Migrations, { debug: true })
     protected readonly migrations!: Migrations
 
     @Inject()
@@ -259,8 +259,8 @@ export abstract class Migrator {
      * @protected
      */
     protected async applying(migration: Migration): Promise<void> {
-        // const event = <ApplyingMigrationEvent> this.injector.make(ApplyingMigrationEvent, migration)
-        // await this.bus.dispatch(event)
+        const event = <ApplyingMigrationEvent> this.injector.make(ApplyingMigrationEvent, migration)
+        await this.bus.dispatch(event)
     }
 
     /**
@@ -269,8 +269,8 @@ export abstract class Migrator {
      * @protected
      */
     protected async applied(migration: Migration): Promise<void> {
-        // const event = <AppliedMigrationEvent> this.injector.make(AppliedMigrationEvent, migration)
-        // await this.bus.dispatch(event)
+        const event = <AppliedMigrationEvent> this.injector.make(AppliedMigrationEvent, migration)
+        await this.bus.dispatch(event)
     }
 
     /**
@@ -279,8 +279,8 @@ export abstract class Migrator {
      * @protected
      */
     protected async rollingBack(migration: Migration): Promise<void> {
-        // const event = <RollingBackMigrationEvent> this.injector.make(RollingBackMigrationEvent, migration)
-        // await this.bus.dispatch(event)
+        const event = <RollingBackMigrationEvent> this.injector.make(RollingBackMigrationEvent, migration)
+        await this.bus.dispatch(event)
     }
 
     /**
@@ -289,7 +289,7 @@ export abstract class Migrator {
      * @protected
      */
     protected async rolledBack(migration: Migration): Promise<void> {
-        // const event = <RolledBackMigrationEvent> this.injector.make(RolledBackMigrationEvent, migration)
-        // await this.bus.dispatch(event)
+        const event = <RolledBackMigrationEvent> this.injector.make(RolledBackMigrationEvent, migration)
+        await this.bus.dispatch(event)
     }
 }

src/orm/migrations/MigratorFactory.ts

@@ -4,7 +4,7 @@ import {
     PropertyDependency,
     isInstantiable,
     DEPENDENCY_KEYS_METADATA_KEY,
-    DEPENDENCY_KEYS_PROPERTY_METADATA_KEY, Instantiable, Injectable, Inject,
+    DEPENDENCY_KEYS_PROPERTY_METADATA_KEY, Instantiable, Injectable, Inject, FactoryProducer,
 } from '../../di'
 import {Collection, ErrorWithContext} from '../../util'
 import {Logging} from '../../service/Logging'
@@ -17,6 +17,7 @@ import {DatabaseMigrator} from './DatabaseMigrator'
  * and produces an instance of the configured session driver implementation.
  */
 @Injectable()
+@FactoryProducer()
 export class MigratorFactory extends AbstractFactory<Migrator> {
     @Inject()
     protected readonly logging!: Logging

src/orm/services/Migrations.ts

@@ -2,22 +2,15 @@ import {Inject, Singleton} from '../../di'
 import {CanonicalInstantiable} from '../../service/CanonicalInstantiable'
 import {Migration} from '../migrations/Migration'
 import {CanonicalDefinition, CanonicalResolver} from '../../service/Canonical'
-import {Migrator} from '../migrations/Migrator'
 import {UniversalPath} from '../../util'
 import {lib} from '../../lib'
 import {CommandLine} from '../../cli'
-import {MigrateDirective} from '../directive/MigrateDirective'
-import {RollbackDirective} from '../directive/RollbackDirective'
-import {CreateMigrationDirective} from '../directive/CreateMigrationDirective'
-import {MigratorFactory} from '../migrations/MigratorFactory'
 
 /**
  * Service unit that loads and instantiates migration classes.
  */
 @Singleton()
 export class Migrations extends CanonicalInstantiable<Migration> {
-    protected migrator!: Migrator
-
     @Inject()
     protected readonly cli!: CommandLine
 
@@ -34,22 +27,10 @@ export class Migrations extends CanonicalInstantiable<Migration> {
             this.logging.debug(`Base migration path does not exist, or has no files: ${this.path}`)
         }
 
-        // Register the migrator factory
-        this.container().registerFactory(
-            this.container().make<MigratorFactory>(MigratorFactory),
-        )
-
-        this.migrator = this.container().make(Migrator)
-
         // Register the migrations for @extollo/lib
         const basePath = lib().concat('migrations')
         const resolver = await this.buildMigrationNamespaceResolver('@extollo', basePath)
         this.registerNamespace('@extollo', resolver)
-
-        // Register the migrate CLI directives
-        this.cli.registerDirective(MigrateDirective)
-        this.cli.registerDirective(RollbackDirective)
-        this.cli.registerDirective(CreateMigrationDirective)
     }
 
     async initCanonicalItem(definition: CanonicalDefinition): Promise<Migration> {

src/util/support/debug.ts

@@ -2,6 +2,7 @@
 export function isDebugging(key: string): boolean {
     const env = 'EXTOLLO_DEBUG_' + key.split(/(?:\s|\.)+/).join('_')
         .toUpperCase()
+
     return process.env[env] === 'yes'
 }