refactor(dart): migrate to class based datasource (#10134)

lib/datasource/api.ts

@@ -2,7 +2,7 @@ import * as bitbucketTags from './bitbucket-tags';
 import { CdnJsDatasource } from './cdnjs';
 import { ClojureDatasource } from './clojure';
 import * as crate from './crate';
-import * as dart from './dart';
+import { DartDatasource } from './dart';
 import * as docker from './docker';
 import * as galaxy from './galaxy';
 import * as galaxyCollection from './galaxy-collection';
@@ -39,7 +39,7 @@ api.set('bitbucket-tags', bitbucketTags);
 api.set('cdnjs', new CdnJsDatasource());
 api.set('clojure', new ClojureDatasource());
 api.set('crate', crate);
-api.set('dart', dart);
+api.set('dart', new DartDatasource());
 api.set('docker', docker);
 api.set('galaxy', galaxy);
 api.set('galaxy-collection', galaxyCollection);

lib/datasource/dart/index.spec.ts

@@ -1,7 +1,7 @@
 import { getPkgReleases } from '..';
 import * as httpMock from '../../../test/http-mock';
 import { getName, loadJsonFixture } from '../../../test/util';
-import { id as datasource } from '.';
+import { DartDatasource } from '.';
 
 const body = loadJsonFixture('shared_preferences.json');
 
@@ -20,7 +20,10 @@ describe(getName(), () => {
     it('returns null for empty result', async () => {
       httpMock.scope(baseUrl).get('/non_sense').reply(200, null);
       expect(
-        await getPkgReleases({ datasource, depName: 'non_sense' })
+        await getPkgReleases({
+          datasource: DartDatasource.id,
+          depName: 'non_sense',
+        })
       ).toBeNull();
       expect(httpMock.getTrace()).toMatchSnapshot();
     });
@@ -35,7 +38,7 @@ describe(getName(), () => {
         .reply(200, withoutVersions);
       expect(
         await getPkgReleases({
-          datasource,
+          datasource: DartDatasource.id,
           depName: 'shared_preferences',
         })
       ).toBeNull();
@@ -50,7 +53,7 @@ describe(getName(), () => {
         .reply(200, withoutLatest);
       expect(
         await getPkgReleases({
-          datasource,
+          datasource: DartDatasource.id,
           depName: 'shared_preferences',
         })
       ).toBeNull();
@@ -61,7 +64,7 @@ describe(getName(), () => {
       httpMock.scope(baseUrl).get('/shared_preferences').reply(404);
       expect(
         await getPkgReleases({
-          datasource,
+          datasource: DartDatasource.id,
           depName: 'shared_preferences',
         })
       ).toBeNull();
@@ -72,7 +75,7 @@ describe(getName(), () => {
       let e;
       try {
         await getPkgReleases({
-          datasource,
+          datasource: DartDatasource.id,
           depName: 'shared_preferences',
         });
       } catch (err) {
@@ -86,7 +89,7 @@ describe(getName(), () => {
       httpMock.scope(baseUrl).get('/shared_preferences').replyWithError('');
       expect(
         await getPkgReleases({
-          datasource,
+          datasource: DartDatasource.id,
           depName: 'shared_preferences',
         })
       ).toBeNull();
@@ -95,7 +98,7 @@ describe(getName(), () => {
     it('processes real data', async () => {
       httpMock.scope(baseUrl).get('/shared_preferences').reply(200, body);
       const res = await getPkgReleases({
-        datasource,
+        datasource: DartDatasource.id,
         depName: 'shared_preferences',
       });
       expect(res).toMatchSnapshot();

lib/datasource/dart/index.ts

@@ -1,15 +1,20 @@
-import { ExternalHostError } from '../../types/errors/external-host-error';
-import { Http, HttpResponse } from '../../util/http';
+import { HttpResponse } from '../../util/http';
+import { Datasource } from '../datasource';
 import type { GetReleasesConfig, ReleaseResult } from '../types';
 import type { DartResult } from './types';
 
-export const id = 'dart';
-export const defaultRegistryUrls = ['https://pub.dartlang.org/'];
-export const customRegistrySupport = false;
+export class DartDatasource extends Datasource {
+  static readonly id = 'dart';
 
-const http = new Http(id);
+  constructor() {
+    super(DartDatasource.id);
+  }
 
-export async function getReleases({
+  readonly customRegistrySupport = false;
+
+  readonly defaultRegistryUrls = ['https://pub.dartlang.org/'];
+
+  async getReleases({
     lookupName,
     registryUrl,
   }: GetReleasesConfig): Promise<ReleaseResult | null> {
@@ -18,15 +23,9 @@ export async function getReleases({
 
     let raw: HttpResponse<DartResult> = null;
     try {
-    raw = await http.getJson<DartResult>(pkgUrl);
+      raw = await this.http.getJson<DartResult>(pkgUrl);
     } catch (err) {
-    if (
-      err.statusCode === 429 ||
-      (err.statusCode >= 500 && err.statusCode < 600)
-    ) {
-      throw new ExternalHostError(err);
-    }
-    throw err;
+      this.handleGenericErrors(err);
     }
 
     const body = raw?.body;
@@ -52,6 +51,6 @@ export async function getReleases({
         }
       }
     }
-
     return result;
   }
+}

lib/manager/pub/extract.ts

@@ -1,5 +1,5 @@
 import { safeLoad } from 'js-yaml';
-import * as datasourceDart from '../../datasource/dart';
+import { DartDatasource } from '../../datasource/dart';
 import { logger } from '../../logger';
 import type { PackageDependency, PackageFile } from '../types';
 
@@ -54,7 +54,7 @@ export function extractPackageFile(
     if (deps.length) {
       return {
         packageFile,
-        datasource: datasourceDart.id,
+        datasource: DartDatasource.id,
         deps,
       };
     }