Add Additional Reviewers Argument

README.md

@@ -163,6 +163,12 @@ Controls whether to copy the requested reviewers from the original pull request
 Note that this does not request reviews from those users who already reviewed the original pull request.
 By default, the requested reviewers are not copied.
 
+### `additional_reviewers`
+
+Default: `''` (disabled)
+
+Comma-separated list of GitHub usernames to add as reviewers to the backport pull request.
+
 ### `experimental`
 
 Default:

action.yml

@@ -45,6 +45,10 @@ inputs:
       Note that this does not request reviews from those users who already reviewed the original pull request.
       By default, the requested reviewers are not copied.
     default: false
+  additional_reviewers:
+    description: >
+      Comma-separated list of GitHub usernames to add as reviewers to the backport pull request.
+      By default, no additional reviewers are added.
   experimental:
     description: >
       Configure experimental features by passing a JSON object.

dist/index.js

@@ -1079,6 +1079,7 @@ function run() {
         const copy_assignees = core.getInput("copy_assignees");
         const copy_milestone = core.getInput("copy_milestone");
         const copy_requested_reviewers = core.getInput("copy_requested_reviewers");
+        const additional_reviewers = core.getInput("additional_reviewers");
         const experimental = JSON.parse(core.getInput("experimental"));
         const source_pr_number = core.getInput("source_pr_number");
         if (cherry_picking !== "auto" && cherry_picking !== "pull_request_head") {
@@ -1126,6 +1127,7 @@ function run() {
             copy_assignees: copy_assignees === "true",
             copy_milestone: copy_milestone === "true",
             copy_requested_reviewers: copy_requested_reviewers === "true",
+            additional_reviewers: additional_reviewers === "" ? undefined : additional_reviewers.split(","),
             experimental: Object.assign(Object.assign({}, backport_1.experimentalDefaults), experimental),
             source_pr_number: source_pr_number === "" ? undefined : parseInt(source_pr_number),
         };

src/backport.ts

@@ -35,6 +35,7 @@ export type Config = {
   copy_milestone: boolean;
   copy_assignees: boolean;
   copy_requested_reviewers: boolean;
+  additional_reviewers: string[];
   experimental: Experimental;
 };
 
@@ -418,23 +419,26 @@ export class Backport {
             }
           }
 
+          let reviewers: string [] = this.config.additional_reviewers || []
           if (this.config.copy_requested_reviewers == true) {
-            const reviewers = mainpr.requested_reviewers?.map(
-              (reviewer) => reviewer.login,
-            );
-            if (reviewers?.length > 0) {
-              console.info("Setting reviewers " + reviewers);
-              const reviewRequest = {
-                owner,
-                repo,
-                pull_number: new_pr.number,
-                reviewers: reviewers,
-              };
-              const set_reviewers_response =
-                await this.github.requestReviewers(reviewRequest);
-              if (set_reviewers_response.status != 201) {
-                console.error(JSON.stringify(set_reviewers_response));
-              }
+            const requested_reviewers = mainpr.requested_reviewers?.map(
+                (reviewer) => reviewer.login,
+            ) || [];
+            reviewers = reviewers.concat(requested_reviewers)
+          }
+          reviewers = [...new Set(reviewers)];
+          if (reviewers?.length > 0) {
+            console.info("Setting reviewers " + reviewers);
+            const reviewRequest = {
+              owner,
+              repo,
+              pull_number: new_pr.number,
+              reviewers: reviewers,
+            };
+            const set_reviewers_response =
+              await this.github.requestReviewers(reviewRequest);
+            if (set_reviewers_response.status != 201) {
+              console.error(JSON.stringify(set_reviewers_response));
             }
           }
 

src/main.ts

@@ -29,6 +29,7 @@ async function run(): Promise<void> {
   const copy_assignees = core.getInput("copy_assignees");
   const copy_milestone = core.getInput("copy_milestone");
   const copy_requested_reviewers = core.getInput("copy_requested_reviewers");
+  const additional_reviewers = core.getInput("additional_reviewers");
   const experimental = JSON.parse(core.getInput("experimental"));
   const source_pr_number = core.getInput("source_pr_number");
 
@@ -85,6 +86,7 @@ async function run(): Promise<void> {
     copy_assignees: copy_assignees === "true",
     copy_milestone: copy_milestone === "true",
     copy_requested_reviewers: copy_requested_reviewers === "true",
+    additional_reviewers: additional_reviewers === "" ? undefined : additional_reviewers.split(","),
     experimental: { ...experimentalDefaults, ...experimental },
     source_pr_number:
       source_pr_number === "" ? undefined : parseInt(source_pr_number),