consistent promise behavior for download artifact

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

@@ -16,6 +16,7 @@ import {
   ListArtifactsRequest
 } from '../../generated'
 import {getBackendIdsFromToken} from '../shared/util'
+import {ArtifactNotFoundError} from '../shared/errors'
 
 const scrubQueryParameters = (url: string): string => {
   const parsed = new URL(url)
@@ -95,7 +96,7 @@ export async function downloadArtifactPublic(
     throw new Error(`Unable to download and extract artifact: ${error.message}`)
   }
 
-  return {success: true, downloadPath}
+  return {downloadPath}
 }
 
 export async function downloadArtifactInternal(
@@ -118,10 +119,9 @@ export async function downloadArtifactInternal(
   const {artifacts} = await artifactClient.ListArtifacts(listReq)
 
   if (artifacts.length === 0) {
-    core.warning(
+    throw new ArtifactNotFoundError(
       `No artifacts found for ID: ${artifactId}\nAre you trying to download from a different run? Try specifying a github-token with \`actions:read\` scope.`
     )
-    return {success: false}
   }
 
   if (artifacts.length > 1) {
@@ -148,7 +148,7 @@ export async function downloadArtifactInternal(
     throw new Error(`Unable to download and extract artifact: ${error.message}`)
   }
 
-  return {success: true, downloadPath}
+  return {downloadPath}
 }
 
 async function resolveOrCreateDirectory(

packages/artifact/src/internal/find/get-artifact.ts

@@ -48,7 +48,9 @@ export async function getArtifactPublic(
   }
 
   if (getArtifactResp.data.artifacts.length === 0) {
-    throw new ArtifactNotFoundError(artifactName)
+    throw new ArtifactNotFoundError(
+      `Artifact not found for name: ${artifactName}`
+    )
   }
 
   let artifact = getArtifactResp.data.artifacts[0]
@@ -86,7 +88,9 @@ export async function getArtifactInternal(
   const res = await artifactClient.ListArtifacts(req)
 
   if (res.artifacts.length === 0) {
-    throw new ArtifactNotFoundError(artifactName)
+    throw new ArtifactNotFoundError(
+      `Artifact not found for name: ${artifactName}`
+    )
   }
 
   let artifact = res.artifacts[0]

packages/artifact/src/internal/shared/errors.ts

@@ -21,8 +21,7 @@ export class InvalidResponseError extends Error {
 }
 
 export class ArtifactNotFoundError extends Error {
-  constructor(name: string) {
-    const message = `No artifact found for name: ${name}`
+  constructor(message = 'Artifact not found') {
     super(message)
     this.name = 'ArtifactNotFoundError'
   }

packages/artifact/src/internal/shared/interfaces.ts

@@ -86,10 +86,6 @@ export interface ListArtifactsResponse {
  *                                                                           *
  *****************************************************************************/
 export interface DownloadArtifactResponse {
-  /**
-   * If the artifact download was successful
-   */
-  success: boolean
   /**
    * The path where the artifact was downloaded to
    */