Delete unused database code

plugins/scaffolder-backend/src/tasks/Database.ts

@@ -1,70 +0,0 @@
-/*
- * Copyright 2021 Spotify AB
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-import { ConflictError, resolvePackagePath } from '@backstage/backend-common';
-import Knex from 'knex';
-import { Logger } from 'winston';
-import { Database, Transaction } from './types';
-
-const migrationsDir = resolvePackagePath(
-  '@backstage/plugin-scaffolder-backend',
-  'migrations',
-);
-
-export class CommonDatabase implements Database {
-  static async create(knex: Knex, logger: Logger): Promise<CommonDatabase> {
-    await knex.migrate.latest({
-      directory: migrationsDir,
-    });
-    return new CommonDatabase(knex, logger);
-  }
-
-  constructor(
-    private readonly database: Knex,
-    private readonly logger: Logger,
-  ) {}
-
-  async transaction<T>(fn: (tx: Transaction) => Promise<T>): Promise<T> {
-    try {
-      let result: T | undefined = undefined;
-
-      await this.database.transaction(
-        async tx => {
-          // We can't return here, as knex swallows the return type in case the transaction is rolled back:
-          // https://github.com/knex/knex/blob/e37aeaa31c8ef9c1b07d2e4d3ec6607e557d800d/lib/transaction.js#L136
-          result = await fn(tx);
-        },
-        {
-          // If we explicitly trigger a rollback, don't fail.
-          doNotRejectOnRollback: true,
-        },
-      );
-
-      return result!;
-    } catch (e) {
-      this.logger.debug(`Error during transaction, ${e}`);
-
-      if (
-        /SQLITE_CONSTRAINT: UNIQUE/.test(e.message) ||
-        /unique constraint/.test(e.message)
-      ) {
-        throw new ConflictError(`Rejected due to a conflicting entity`, e);
-      }
-
-      throw e;
-    }
-  }
-}

plugins/scaffolder-backend/src/tasks/types.ts

@@ -1,37 +0,0 @@
-/*
- * Copyright 2021 Spotify AB
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/**
- * The core database implementation.
- */
-export interface Database {
-  /**
-   * Runs a transaction.
-   *
-   * The callback is expected to make calls back into this class. When it
-   * completes, the transaction is closed.
-   *
-   * @param fn The callback that implements the transaction
-   */
-  transaction<T>(fn: (tx: Transaction) => Promise<T>): Promise<T>;
-}
-
-/**
- * An abstraction for transactions of the underlying database technology.
- */
-export type Transaction = {
-  rollback(): Promise<void>;
-};