[Artifacts] Prepare for v2.0.0 of @actions/artifact (#1479)

* Prepare for v2.0.0 of @actions/artifact

* Run prettier

* temporary disable unused vars

packages/artifact/src/internal/upload/upload-artifact.ts

@@ -0,0 +1,18 @@
+import {UploadOptions} from './upload-options'
+import {UploadResponse} from './upload-response'
+
+export async function uploadArtifact(
+  name: string,
+  files: string[], // eslint-disable-line @typescript-eslint/no-unused-vars
+  rootDirectory: string, // eslint-disable-line @typescript-eslint/no-unused-vars
+  options?: UploadOptions | undefined // eslint-disable-line @typescript-eslint/no-unused-vars
+): Promise<UploadResponse> {
+  // TODO - Implement upload functionality
+
+  const uploadResponse: UploadResponse = {
+    artifactName: name,
+    size: 0
+  }
+
+  return uploadResponse
+}

packages/artifact/src/internal/upload/upload-options.ts

@@ -0,0 +1,18 @@
+export interface UploadOptions {
+  /**
+   * Duration after which artifact will expire in days.
+   *
+   * By default artifact expires after 90 days:
+   * https://docs.github.com/en/actions/configuring-and-managing-workflows/persisting-workflow-data-using-artifacts#downloading-and-deleting-artifacts-after-a-workflow-run-is-complete
+   *
+   * Use this option to override the default expiry.
+   *
+   * Min value: 1
+   * Max value: 90 unless changed by repository setting
+   *
+   * If this is set to a greater value than the retention settings allowed, the retention on artifacts
+   * will be reduced to match the max value allowed on server, and the upload process will continue. An
+   * input of 0 assumes default retention setting.
+   */
+  retentionDays?: number
+}

packages/artifact/src/internal/upload/upload-response.ts

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+export interface UploadResponse {
+  /**
+   * The name of the artifact that was uploaded
+   */
+  artifactName: string
+
+  /**
+   * Total size of the artifact that was uploaded in bytes
+   */
+  size: number
+}