introduce @backstage/integration-react and its scmIntegrationsApiRef

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

packages/integration-react/src/ScmIntegrationsApi.test.ts

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+/*
+ * 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 { ConfigReader } from '@backstage/config';
+import {
+  ScmIntegrationsApi,
+  scmIntegrationsApiRef,
+} from './ScmIntegrationsApi';
+
+describe('scmIntegrationsApiRef', () => {
+  it('should export api', () => {
+    expect(scmIntegrationsApiRef).toBeDefined();
+  });
+
+  it('should be instantiated', () => {
+    const i = ScmIntegrationsApi.fromConfig(new ConfigReader({}));
+    expect(i.list().length).toBe(4); // The default ones
+  });
+});

packages/integration-react/src/ScmIntegrationsApi.ts

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+/*
+ * 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 { Config } from '@backstage/config';
+import { ApiRef, createApiRef } from '@backstage/core';
+import { ScmIntegrations } from '@backstage/integration';
+
+export class ScmIntegrationsApi extends ScmIntegrations {
+  static fromConfig(config: Config): ScmIntegrationsApi {
+    return ScmIntegrations.fromConfig(config);
+  }
+}
+
+export const scmIntegrationsApiRef: ApiRef<ScmIntegrationsApi> = createApiRef({
+  id: 'integration.scmintegrations',
+  description: 'All of the registered SCM integrations of your config',
+});

packages/integration-react/src/index.ts

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+/*
+ * 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.
+ */
+
+export {
+  ScmIntegrationsApi,
+  scmIntegrationsApiRef,
+} from './ScmIntegrationsApi';

packages/integration-react/src/setupTests.ts

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+/*
+ * 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 '@testing-library/jest-dom';
+import 'cross-fetch/polyfill';