add get-artifact logic

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

@@ -30,7 +30,7 @@ async function exists(path: string): Promise<boolean> {
   }
 }
 
-async function streamExtract(url: string, directory: PathLike): Promise<void> {
+async function streamExtract(url: string, directory: string): Promise<void> {
   const client = new httpClient.HttpClient(getUserAgentString())
   const response = await client.get(url)
 

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

@@ -1,4 +1,22 @@
-import {GetArtifactResponse} from '../shared/interfaces'
+import {Artifact, GetArtifactResponse} from '../shared/interfaces'
+import {getOctokit} from '@actions/github'
+import {getUserAgentString} from '../shared/user-agent'
+import {defaults as defaultGitHubOptions} from '@actions/github/lib/utils'
+import { RetryOptions, getRetryOptions } from './retry-options'
+import {RequestRequestOptions} from '@octokit/types'
+import {requestLog} from '@octokit/plugin-request-log'
+import {retry} from '@octokit/plugin-retry'
+
+type Options = {
+  log?: Console
+  userAgent?: string
+  previews?: string[]
+  retry?: RetryOptions
+  request?: RequestRequestOptions
+}
+
+const maxRetryNumber = 5
+const exemptStatusCodes = [400, 401, 403, 404, 422] // https://github.com/octokit/plugin-retry.js/blob/9a2443746c350b3beedec35cf26e197ea318a261/src/index.ts#L14
 
 export async function getArtifact(
   artifactName: string,
@@ -7,5 +25,49 @@ export async function getArtifact(
   repositoryName: string,
   token: string
 ): Promise<GetArtifactResponse> {
-  throw new Error('Not implemented')
+
+  const [retryOpts, requestOpts] = getRetryOptions(
+    maxRetryNumber,
+    exemptStatusCodes,
+    defaultGitHubOptions
+  )
+
+  const opts: Options = {
+    log: undefined,
+    userAgent: getUserAgentString(),
+    previews: undefined,
+    retry: retryOpts,
+    request: requestOpts
+  }
+
+  const github = getOctokit(token, opts, retry, requestLog)
+
+  const getArtifactResp = await github.request('GET /repos/{owner}/{repo}/actions/runs/{run_id}/artifacts{?name}', {
+    owner: repositoryOwner,
+    repo: repositoryName,
+    run_id: workflowRunId,
+    name: artifactName,
+  })
+
+  if (getArtifactResp.status !== 200) {
+    return {
+      success: false,
+    }
+  }
+
+  if (getArtifactResp.data.artifacts.length === 0) {
+    return {
+      success: false,
+    }
+  }
+
+  return {
+    success: true,
+    artifact: {
+      name: getArtifactResp.data.artifacts[0].name,
+      id: getArtifactResp.data.artifacts[0].id,
+      url: getArtifactResp.data.artifacts[0].url,
+      size: getArtifactResp.data.artifacts[0].size_in_bytes,
+    },
+  }
 }