fix: wait for draft issues to populate in copy project

__tests__/copy-project.test.mts

@@ -8,8 +8,10 @@ import {
   editItem,
   editProject,
   getDraftIssues,
+  getProject,
   linkProjectToRepository,
-  linkProjectToTeam
+  linkProjectToTeam,
+  ProjectDetails
 } from '../src/lib.js';
 import { mockGetBooleanInput, mockGetInput } from './utils.js';
 
@@ -231,6 +233,11 @@ describe('copyProjectAction', () => {
       'template-view': templateView
     });
     mockGetBooleanInput({ drafts: true });
+    vi.mocked(getProject).mockResolvedValue({
+      items: {
+        totalCount: 1
+      }
+    } as ProjectDetails);
     vi.mocked(getDraftIssues).mockResolvedValue([
       {
         id: 'item-id',
@@ -264,6 +271,11 @@ describe('copyProjectAction', () => {
       'template-view': templateView
     });
     mockGetBooleanInput({ drafts: true });
+    vi.mocked(getProject).mockResolvedValue({
+      items: {
+        totalCount: 1
+      }
+    } as ProjectDetails);
     vi.mocked(getDraftIssues).mockResolvedValue([
       {
         id: itemId,
@@ -302,6 +314,11 @@ describe('copyProjectAction', () => {
       'template-view': templateView
     });
     mockGetBooleanInput({ drafts: true });
+    vi.mocked(getProject).mockResolvedValue({
+      items: {
+        totalCount: 1
+      }
+    } as ProjectDetails);
     vi.mocked(getDraftIssues).mockResolvedValue([
       {
         id: itemId,

src/copy-project.ts

@@ -1,10 +1,14 @@
+import { setTimeout } from 'node:timers/promises';
+
 import * as core from '@actions/core';
 
 import {
   copyProject,
+  DraftIssueItem,
   editItem,
   editProject,
   getDraftIssues,
+  getProject,
   linkProjectToRepository,
   linkProjectToTeam
 } from './lib';
@@ -69,7 +73,28 @@ export async function copyProjectAction(): Promise<void> {
 
     // Do template interpolation on draft issues
     if (templateView) {
-      const draftIssues = await getDraftIssues(project.id);
+      // HACK - It seems that GitHub now populates the draft issues
+      // on the new project in an async manner so they may not all
+      // be available yet. Wait until the number of draft issues
+      // matches the number of draft issues in the source project.
+      const {
+        items: { totalCount: draftIssueCount }
+      } = await getProject(owner, projectNumber);
+
+      let draftIssues: DraftIssueItem[] = [];
+
+      for (let i = 0; i < 10; i++) {
+        await setTimeout(1000);
+        draftIssues = await getDraftIssues(project.id);
+        if (draftIssues.length === draftIssueCount) break;
+      }
+
+      // Log an error but continue as partial success is better than failure
+      if (draftIssues.length !== draftIssueCount) {
+        core.error(
+          `Not all draft issues available for interpolation, expected ${draftIssueCount} but got ${draftIssues.length}`
+        );
+      }
 
       for (const draftIssue of draftIssues) {
         try {