feat: add automerge fail label

README.md

@@ -33,6 +33,9 @@ jobs:
           # Require all pull request statuses to be successful before
           # merging. Default is `false`.
           require_statuses_success: 'true'
+          # Label to apply to the pull request if the merge fails. Default is
+          # `automerge-fail`.
+          automerge_fail_label: 'merge-schedule-failed'
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 ```

action.yml

@@ -24,3 +24,9 @@ inputs:
       merging. Default is `false`.
     required: false
     default: 'false'
+  automerge_fail_label:
+    description: |-
+      Label to apply to the pull request if the merge fails. Default is
+      `automerge-fail`.
+    required: false
+    default: 'automerge-fail'

lib/comment.ts

@@ -5,10 +5,14 @@ type Octokit = InstanceType<typeof GitHub>;
 
 const commentHeader = "**Merge Schedule**";
 const commentFooter = "<!-- Merge Schedule Pull Request Comment -->";
+const commentFailFooter = "<!-- Merge Schedule Pull Request Comment Fail -->";
+
+type CommentVariant = "default" | "fail";
 
 export async function getPreviousComment(
   octokit: Octokit,
-  pullRequestNumber: number
+  pullRequestNumber: number,
+  variant: CommentVariant = "default"
 ) {
   const prComments = await octokit.paginate(
     octokit.rest.issues.listComments,
@@ -18,7 +22,9 @@ export async function getPreviousComment(
     },
     (response) => {
       return response.data.filter((comment) =>
-        comment.body?.includes(commentFooter)
+        comment.body?.includes(
+          variant === "fail" ? commentFailFooter : commentFooter
+        )
       );
     }
   );
@@ -35,13 +41,18 @@ const statePrefix: Record<State, string> = {
   pending: ":hourglass:",
 };
 
-export function generateBody(body: string, state: State) {
+export function generateBody(
+  body: string,
+  state: State,
+  variant: CommentVariant = "default"
+) {
   let newBody = body;
   if (!body.startsWith(commentHeader)) {
     newBody = `${commentHeader}\n${newBody}`;
   }
-  if (!body.endsWith(commentFooter)) {
-    newBody = `${newBody}\n${commentFooter}`;
+  const footer = variant === "fail" ? commentFailFooter : commentFooter;
+  if (!body.endsWith(footer)) {
+    newBody = `${newBody}\n${footer}`;
   }
   return `${statePrefix[state]} ${newBody}`;
 }

lib/environment.d.ts

@@ -7,6 +7,7 @@ declare global {
       INPUT_MERGE_METHOD: string;
       INPUT_TIME_ZONE: string;
       INPUT_REQUIRE_STATUSES_SUCCESS: string;
+      INPUT_AUTOMERGE_FAIL_LABEL: string;
     }
   }
 }

lib/handle-pull-request.test.ts

@@ -98,7 +98,7 @@ describe("handlePullRequest", () => {
       ],
       [`Schedule date found: "bad-date"\n`],
       [
-        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-2\n`,
+        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-22\n`,
       ],
     ]);
     expect(createComment.mock.calls).toHaveLength(1);
@@ -125,7 +125,7 @@ describe("handlePullRequest", () => {
       ],
       [`Schedule date found: "2022-06-08"\n`],
       [
-        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-2\n`,
+        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-22\n`,
       ],
     ]);
     expect(createComment.mock.calls).toHaveLength(1);
@@ -153,7 +153,7 @@ describe("handlePullRequest", () => {
       ],
       [`Schedule date found: "2022-06-08"\n`],
       [
-        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-2\n`,
+        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-22\n`,
       ],
     ]);
     expect(createComment.mock.calls).toHaveLength(1);
@@ -180,7 +180,7 @@ describe("handlePullRequest", () => {
       ],
       [`Schedule date found: "2022-06-12"\n`],
       [
-        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-2\n`,
+        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-22\n`,
       ],
     ]);
     expect(createComment.mock.calls).toHaveLength(1);
@@ -208,7 +208,7 @@ describe("handlePullRequest", () => {
       ],
       [`Schedule date found: "2022-06-12"\n`],
       [
-        `Comment updated: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-1\n`,
+        `Comment updated: https://github.com/gr2m/merge-schedule-action/issues/3#issuecomment-31\n`,
       ],
     ]);
     expect(updateComment.mock.calls).toHaveLength(1);

lib/handle-schedule.test.ts

@@ -33,19 +33,24 @@ describe("handleSchedule", () => {
 
     expect(mockStdout.mock.calls).toEqual([
       [`Loading open pull requests\n`],
-      [`4 scheduled pull requests found\n`],
-      [`3 due pull requests found\n`],
+      [`5 scheduled pull requests found\n`],
+      [`4 due pull requests found\n`],
       [`https://github.com/gr2m/merge-schedule-action/pull/2 merged\n`],
       [
-        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-2\n`,
+        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-22\n`,
       ],
       [`https://github.com/gr2m/merge-schedule-action/pull/3 merged\n`],
       [
-        `Comment updated: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-1\n`,
+        `Comment updated: https://github.com/gr2m/merge-schedule-action/issues/3#issuecomment-31\n`,
       ],
       [
-        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/13#issuecomment-2\n`,
+        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/13#issuecomment-132\n`,
       ],
+      [`Label added: "automerge-fail"\n`],
+      [
+        `Comment updated: https://github.com/gr2m/merge-schedule-action/issues/6#issuecomment-61\n`,
+      ],
+      [`Label added: "automerge-fail"\n`],
     ]);
     expect(createComment.mock.calls).toHaveLength(2);
     expect(createComment.mock.calls[0][2]).toMatchInlineSnapshot(`
@@ -56,14 +61,21 @@ describe("handleSchedule", () => {
     expect(createComment.mock.calls[1][2]).toMatchInlineSnapshot(`
       ":x: **Merge Schedule**
       Scheduled merge failed: Pull Request is not mergeable
-      <!-- Merge Schedule Pull Request Comment -->"
+      In order to let the automerge-automation try again, the label \\"automerge-fail\\" should be removed.
+      <!-- Merge Schedule Pull Request Comment Fail -->"
     `);
-    expect(updateComment.mock.calls).toHaveLength(1);
+    expect(updateComment.mock.calls).toHaveLength(2);
     expect(updateComment.mock.calls[0][2]).toMatchInlineSnapshot(`
       ":white_check_mark: **Merge Schedule**
       Scheduled on 2022-06-09 (UTC) successfully merged
       <!-- Merge Schedule Pull Request Comment -->"
     `);
+    expect(updateComment.mock.calls[1][2]).toMatchInlineSnapshot(`
+      ":x: **Merge Schedule**
+      Scheduled merge failed: Pull Request is not mergeable
+      In order to let the automerge-automation try again, the label \\"automerge-fail\\" should be removed.
+      <!-- Merge Schedule Pull Request Comment Fail -->"
+    `);
   });
 
   test("due pull requests with require_statuses_success = true", async () => {
@@ -76,18 +88,23 @@ describe("handleSchedule", () => {
 
     expect(mockStdout.mock.calls).toEqual([
       [`Loading open pull requests\n`],
-      [`4 scheduled pull requests found\n`],
-      [`3 due pull requests found\n`],
+      [`5 scheduled pull requests found\n`],
+      [`4 due pull requests found\n`],
       [`https://github.com/gr2m/merge-schedule-action/pull/2 merged\n`],
       [
-        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-2\n`,
+        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/2#issuecomment-22\n`,
       ],
       [
         `https://github.com/gr2m/merge-schedule-action/pull/3 is not ready to be merged yet because all checks are not completed or statuses are not success\n`,
       ],
       [
-        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/13#issuecomment-2\n`,
+        `Comment created: https://github.com/gr2m/merge-schedule-action/issues/13#issuecomment-132\n`,
       ],
+      [`Label added: "automerge-fail"\n`],
+      [
+        `Comment updated: https://github.com/gr2m/merge-schedule-action/issues/6#issuecomment-61\n`,
+      ],
+      [`Label added: "automerge-fail"\n`],
     ]);
     expect(createComment.mock.calls).toHaveLength(2);
     expect(createComment.mock.calls[0][2]).toMatchInlineSnapshot(`
@@ -98,8 +115,15 @@ describe("handleSchedule", () => {
     expect(createComment.mock.calls[1][2]).toMatchInlineSnapshot(`
       ":x: **Merge Schedule**
       Scheduled merge failed: Pull Request is not mergeable
-      <!-- Merge Schedule Pull Request Comment -->"
+      In order to let the automerge-automation try again, the label \\"automerge-fail\\" should be removed.
+      <!-- Merge Schedule Pull Request Comment Fail -->"
+    `);
+    expect(updateComment.mock.calls).toHaveLength(1);
+    expect(updateComment.mock.calls[0][2]).toMatchInlineSnapshot(`
+      ":x: **Merge Schedule**
+      Scheduled merge failed: Pull Request is not mergeable
+      In order to let the automerge-automation try again, the label \\"automerge-fail\\" should be removed.
+      <!-- Merge Schedule Pull Request Comment Fail -->"
     `);
-    expect(updateComment.mock.calls).toHaveLength(0);
   });
 });

lib/handle-schedule.ts

@@ -28,6 +28,7 @@ export default async function handleSchedule(): Promise<void> {
   const mergeMethod = process.env.INPUT_MERGE_METHOD;
   const requireStatusesSuccess =
     process.env.INPUT_REQUIRE_STATUSES_SUCCESS === "true";
+  const automergeFailLabel = process.env.INPUT_AUTOMERGE_FAIL_LABEL;
   if (!isValidMergeMethod(mergeMethod)) {
     core.setFailed(`merge_method "${mergeMethod}" is invalid`);
     return;
@@ -46,6 +47,9 @@ export default async function handleSchedule(): Promise<void> {
       return response.data
         .filter((pullRequest) => !isFork(pullRequest as SimplePullRequest))
         .filter((pullRequest) => hasScheduleCommand(pullRequest.body))
+        .filter((pullRequest) =>
+          pullRequest.labels.every((label) => label.name !== automergeFailLabel)
+        )
         .map((pullRequest) => {
           return {
             number: pullRequest.number,
@@ -95,15 +99,39 @@ export default async function handleSchedule(): Promise<void> {
       });
       core.info(`${pullRequest.html_url} merged`);
     } catch (error) {
-      const { data } = await createComment(
+      const previousComment = await getPreviousComment(
         octokit,
         pullRequest.number,
-        generateBody(
-          `Scheduled merge failed: ${(error as Error).message}`,
-          "error"
-        )
+        "fail"
       );
-      core.info(`Comment created: ${data.html_url}`);
+      const commentBody = generateBody(
+        `Scheduled merge failed: ${
+          (error as Error).message
+        }\nIn order to let the automerge-automation try again, the label "${automergeFailLabel}" should be removed.`,
+        "error",
+        "fail"
+      );
+      if (previousComment) {
+        const { data } = await updateComment(
+          octokit,
+          previousComment.id,
+          commentBody
+        );
+        core.info(`Comment updated: ${data.html_url}`);
+      } else {
+        const { data } = await createComment(
+          octokit,
+          pullRequest.number,
+          commentBody
+        );
+        core.info(`Comment created: ${data.html_url}`);
+      }
+      await octokit.rest.issues.addLabels({
+        ...github.context.repo,
+        issue_number: pullRequest.number,
+        labels: [automergeFailLabel],
+      });
+      core.info(`Label added: "${automergeFailLabel}"`);
       continue;
     }