add conditional failure

action.yml

@@ -12,6 +12,10 @@ inputs:
   repo_token:
     description: "The GITHUB_TOKEN secret"
     required: true
+  fail:
+    default: 'true'
+    description: "Should the action fail if it is not a pull request"
+    required: false
 
 outputs:
   base_ref:

src/PullRequests.ts

@@ -20,6 +20,8 @@ interface PullRequestDetailsResponse {
 }
 
 export async function isPullRequest(token: string) {
+  if (context.issue && !context.issue.number) return false
+
   const client = getOctokit(token);
 
   const { data: { pull_request } } = await client.issues.get({

src/main.ts

@@ -26,7 +26,8 @@ export async function run() {
     setOutput("ref", head_ref);
     setOutput("sha", head_sha);
   } catch (error) {
-    setFailed(error.message);
+    if (getInput("fail").toLowerCase() == 'true')
+      setFailed(error.message);
     throw error;
   }
 }