feat: allow repositories input to be comma or newline-separated (#169)

Resolves https://github.com/actions/create-github-app-token/issues/106

- Fixes the parsing to cope with whitespace in the input string.
- Allows the input to be comma or newline-separated. (I've done this for
all array-type inputs in my own actions, but I'm happy to remove this if
you only want to support comma-separated.)
- Added tests for parsing comma and newline-separated inputs.

lib/main.js

@@ -5,7 +5,7 @@ import pRetry from "p-retry";
  * @param {string} appId
  * @param {string} privateKey
  * @param {string} owner
- * @param {string} repositories
+ * @param {string[]} repositories
  * @param {import("@actions/core")} core
  * @param {import("@octokit/auth-app").createAppAuth} createAppAuth
  * @param {import("@octokit/request").request} request
@@ -22,21 +22,23 @@ export async function main(
   skipTokenRevoke
 ) {
   let parsedOwner = "";
-  let parsedRepositoryNames = "";
+  let parsedRepositoryNames = [];
 
   // If neither owner nor repositories are set, default to current repository
-  if (!owner && !repositories) {
-    [parsedOwner, parsedRepositoryNames] = String(
+  if (!owner && repositories.length === 0) {
+    const [owner, repo] = String(
       process.env.GITHUB_REPOSITORY
     ).split("/");
+    parsedOwner = owner;
+    parsedRepositoryNames = [repo];
 
     core.info(
-      `owner and repositories not set, creating token for the current repository ("${parsedRepositoryNames}")`
+      `owner and repositories not set, creating token for the current repository ("${repo}")`
     );
   }
 
   // If only an owner is set, default to all repositories from that owner
-  if (owner && !repositories) {
+  if (owner && repositories.length === 0) {
     parsedOwner = owner;
 
     core.info(
@@ -45,22 +47,22 @@ export async function main(
   }
 
   // If repositories are set, but no owner, default to `GITHUB_REPOSITORY_OWNER`
-  if (!owner && repositories) {
+  if (!owner && repositories.length > 0) {
     parsedOwner = String(process.env.GITHUB_REPOSITORY_OWNER);
     parsedRepositoryNames = repositories;
 
     core.info(
-      `owner not set, creating owner for given repositories "${repositories}" in current owner ("${parsedOwner}")`
+      `owner not set, creating owner for given repositories "${repositories.join(',')}" in current owner ("${parsedOwner}")`
     );
   }
 
   // If both owner and repositories are set, use those values
-  if (owner && repositories) {
+  if (owner && repositories.length > 0) {
     parsedOwner = owner;
     parsedRepositoryNames = repositories;
 
     core.info(
-      `owner and repositories set, creating token for repositories "${repositories}" owned by "${owner}"`
+      `owner and repositories set, creating token for repositories "${repositories.join(',')}" owned by "${owner}"`
     );
   }
 
@@ -73,11 +75,11 @@ export async function main(
   let authentication, installationId, appSlug;
   // If at least one repository is set, get installation ID from that repository
 
-  if (parsedRepositoryNames) {
+  if (parsedRepositoryNames.length > 0) {
     ({ authentication, installationId, appSlug } = await pRetry(() => getTokenFromRepository(request, auth, parsedOwner, parsedRepositoryNames), {
       onFailedAttempt: (error) => {
         core.info(
-          `Failed to create token for "${parsedRepositoryNames}" (attempt ${error.attemptNumber}): ${error.message}`
+          `Failed to create token for "${parsedRepositoryNames.join(',')}" (attempt ${error.attemptNumber}): ${error.message}`
         );
       },
       retries: 3,
@@ -144,7 +146,7 @@ async function getTokenFromRepository(request, auth, parsedOwner, parsedReposito
   // https://docs.github.com/rest/apps/apps?apiVersion=2022-11-28#get-a-repository-installation-for-the-authenticated-app
   const response = await request("GET /repos/{owner}/{repo}/installation", {
     owner: parsedOwner,
-    repo: parsedRepositoryNames.split(",")[0],
+    repo: parsedRepositoryNames[0],
     request: {
       hook: auth.hook,
     },
@@ -154,11 +156,11 @@ async function getTokenFromRepository(request, auth, parsedOwner, parsedReposito
   const authentication = await auth({
     type: "installation",
     installationId: response.data.id,
-    repositoryNames: parsedRepositoryNames.split(","),
+    repositoryNames: parsedRepositoryNames,
   });
 
   const installationId = response.data.id;
   const appSlug = response.data['app_slug'];
 
   return { authentication, installationId, appSlug };
- }
+}