feat: fail gracefully if there are no discussion categories to action

Author: kellertk

src/GithubDiscussionClient.ts

@@ -145,7 +145,7 @@ export class GithubDiscussionClient {
     return result.data.repository?.discussions as DiscussionConnection;
   }
 
-  public async getAnswerableDiscussionCategoryIDs(): Promise<any> {
+  public async getAnswerableDiscussionCategoryIDs(): Promise<string[]> {
     const result = await this.githubClient.query<GetAnswerableDiscussionIdQuery, GetAnswerableDiscussionIdQueryVariables>({
       query: GetAnswerableDiscussionId,
       variables: {
@@ -166,7 +166,7 @@ export class GithubDiscussionClient {
     })
 
     if (!answerableCategoryIDs.length) {
-      throw new Error('There are no answerable discussion categories in this repository, this GitHub Action only works on answerable discussion categories.');
+      core.warning('There are no answerable discussion categories in this repository, this GitHub Action only works on answerable discussion categories.');
     }
 
     return answerableCategoryIDs;

src/index.ts

@@ -38,6 +38,10 @@ async function main() {
 
 export async function processDiscussions(githubClient: GithubDiscussionClient) {
   const discussionCategoryIDList: string[] = await githubClient.getAnswerableDiscussionCategoryIDs();
+  if (discussionCategoryIDList.length === 0) {
+    core.info('No answerable discussions found. Exiting.');
+    return;
+  }
 
   for (const discussionCategoryID of discussionCategoryIDList) {
     let hasNextPage = true;