feat: support @configuration decorator

.prettierrc

@@ -0,0 +1,6 @@
+{
+  "trailingComma": "es5",
+  "tabWidth": 2,
+  "singleQuote": true,
+  "quoteProps": "consistent"
+}

packages/midway-core/package.json

@@ -24,12 +24,10 @@
   "license": "MIT",
   "devDependencies": {
     "chai": "^4.2.0",
-    "midway-bin": "^1.16.3",
-    "xmldom": "^0.1.27"
+    "midway-bin": "^1.16.3"
   },
   "dependencies": {
     "@midwayjs/decorator": "^1.16.3",
-    "camelcase": "^5.2.0",
     "debug": "^4.1.1",
     "globby": "^10.0.1",
     "graphviz": "^0.0.8",

packages/midway-core/src/configuration.ts

@@ -0,0 +1,62 @@
+import { CONFIGURATION_KEY } from '@midwayjs/decorator';
+import { join, dirname, isAbsolute } from 'path';
+import { getClassMetadata } from 'injection';
+import { IContainerConfiguration, IMidwayContainer } from './interface';
+import { safeRequire } from './util';
+
+export class ContainerConfiguration implements IContainerConfiguration {
+  container: IMidwayContainer;
+  preloadModules;
+  readyBindModules: Map<string, Set<any>> = new Map();
+  importDirectory = [];
+  imports: string[] = [];
+  importObjects: object = new Map();
+
+  constructor(container) {
+    this.container = container;
+  }
+
+  addImports(imports: string[]) {
+    // 处理 imports
+    for (const importPackage of imports) {
+      this.load(importPackage);
+    }
+    this.imports = this.imports.concat(imports);
+  }
+
+  addImportObjects(importObjects: object) {
+    this.importObjects = importObjects;
+  }
+
+  resolvePackageBaseDir(packageName: string) {
+    return dirname(require.resolve(packageName));
+  }
+
+  load(packageName: string) {
+    let configuration;
+    if (isAbsolute(packageName)) {
+      configuration = safeRequire(join(packageName, 'configuration'));
+    } else {
+      configuration = safeRequire(`${packageName}/configuration`);
+    }
+    if (configuration) {
+      const configurationOptions = getClassMetadata(
+        CONFIGURATION_KEY,
+        configuration
+      );
+
+      if (configurationOptions.imports) {
+        configuration.addImports(configurationOptions.imports);
+      }
+      if (configurationOptions.importObjects) {
+        configuration.addImportObjects(configurationOptions.importObjects);
+      }
+    }
+  }
+
+  getImportDirectory() {
+    return this.imports.map(importModule => {
+      return this.resolvePackageBaseDir(importModule);
+    });
+  }
+}