Introduce the @backstage/errors package.

Encode thrown errors in the backend as a JSON payload using a facility in that package, and render helpful frontend displays of those errors.

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

packages/techdocs-common/package.json

@@ -41,6 +41,7 @@
     "@backstage/backend-common": "^0.5.6",
     "@backstage/catalog-model": "^0.7.4",
     "@backstage/config": "^0.1.3",
+    "@backstage/errors": "^0.1.1",
     "@backstage/integration": "^0.5.1",
     "@google-cloud/storage": "^5.6.0",
     "@types/dockerode": "^3.2.1",

packages/techdocs-common/src/helpers.ts

@@ -14,7 +14,8 @@
  * limitations under the License.
  */
 
-import { Git, InputError, UrlReader } from '@backstage/backend-common';
+import { Git, UrlReader } from '@backstage/backend-common';
+import { InputError } from '@backstage/errors';
 import { Entity, parseLocationReference } from '@backstage/catalog-model';
 import { Config } from '@backstage/config';
 import fs from 'fs-extra';

packages/techdocs-common/src/stages/prepare/commonGit.ts

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import { NotModifiedError } from '@backstage/backend-common';
+import { NotModifiedError } from '@backstage/errors';
 import { Entity } from '@backstage/catalog-model';
 import { Config } from '@backstage/config';
 import parseGitUrl from 'git-url-parse';

packages/techdocs-common/src/stages/prepare/dir.ts

@@ -13,11 +13,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import {
-  InputError,
-  NotModifiedError,
-  UrlReader,
-} from '@backstage/backend-common';
+
+import { UrlReader } from '@backstage/backend-common';
+import { InputError, NotModifiedError } from '@backstage/errors';
 import { Entity } from '@backstage/catalog-model';
 import { Config } from '@backstage/config';
 import parseGitUrl from 'git-url-parse';

packages/techdocs-common/src/stages/prepare/url.ts

@@ -13,7 +13,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import { NotModifiedError, UrlReader } from '@backstage/backend-common';
+
+import { NotModifiedError } from '@backstage/errors';
+import { UrlReader } from '@backstage/backend-common';
 import { Entity } from '@backstage/catalog-model';
 import { Logger } from 'winston';
 import { getDocFilesFromRepository } from '../../helpers';