download aritfact from latest run which upload an artifact

README.md

@@ -46,4 +46,8 @@ Let's suppose you have a workflow with a job in it that at the end uploads an ar
     path: extract_here
     # Optional, defaults to current repo
     repo: ${{github.repository}}
+    # Optional, check the workflow run whether it has an artifact
+    # then will get the last available artifact from previous workflow
+    # default false, just try to download from the last one
+    check_artifacts:  false
 ```

action.yml

@@ -48,6 +48,9 @@ inputs:
     description: Where to unpack the artifact
     required: false
     default: "./"
+  check_artifacts:
+    description: Check workflow run whether it has an artifact
+    required: false
 runs:
   using: node12
   main: main.js

main.js

@@ -19,6 +19,7 @@ async function main() {
         let event = core.getInput("event")
         let runID = core.getInput("run_id")
         let runNumber = core.getInput("run_number")
+        let checkArtifacts = core.getInput("check_artifacts")
 
         const client = github.getOctokit(token)
 
@@ -75,6 +76,16 @@ async function main() {
                     if (workflowConclusion && (workflowConclusion != run.conclusion && workflowConclusion != run.status)) {
                         continue
                     }
+                    if (checkArtifacts) {
+                        let artifacts = await client.actions.listWorkflowRunArtifacts({
+                            owner: owner,
+                            repo: repo,
+                            run_id: run.id,
+                        })
+                        if (artifacts.data.artifacts.length == 0) {
+                            continue
+                        }
+                    }
                     runID = run.id
                     break
                 }