feat: add retry (#79)

resolves #71

- Add p-retry library
- Extract logic to new functions to improve the usage of retry logic

lib/main.js

@@ -1,3 +1,4 @@
+import pRetry from "p-retry";
 // @ts-check
 
 /**
@@ -75,47 +76,26 @@ export async function main(
 
   let authentication;
   // If at least one repository is set, get installation ID from that repository
-  // https://docs.github.com/rest/apps/apps?apiVersion=2022-11-28#get-a-repository-installation-for-the-authenticated-app
+
   if (parsedRepositoryNames) {
-    const response = await request("GET /repos/{owner}/{repo}/installation", {
-      owner: parsedOwner,
-      repo: parsedRepositoryNames.split(",")[0],
-      headers: {
-        authorization: `bearer ${appAuthentication.token}`,
+    authentication = await pRetry(() => getTokenFromRepository(request, auth, parsedOwner,appAuthentication, parsedRepositoryNames), {
+      onFailedAttempt: (error) => {
+        core.info(
+          `Failed to create token for "${parsedRepositoryNames}" (attempt ${error.attemptNumber}): ${error.message}`
+        );
       },
+      retries: 3,
     });
 
-    // Get token for given repositories
-    authentication = await auth({
-      type: "installation",
-      installationId: response.data.id,
-      repositoryNames: parsedRepositoryNames.split(","),
-    });
   } else {
     // Otherwise get the installation for the owner, which can either be an organization or a user account
-    // https://docs.github.com/rest/apps/apps?apiVersion=2022-11-28#get-a-repository-installation-for-the-authenticated-app
-    const response = await request("GET /orgs/{org}/installation", {
-      org: parsedOwner,
-      headers: {
-        authorization: `bearer ${appAuthentication.token}`,
+    authentication = await pRetry(() => getTokenFromOwner(request, auth, appAuthentication, parsedOwner), {
+      onFailedAttempt: (error) => {
+        core.info(
+          `Failed to create token for "${parsedOwner}" (attempt ${error.attemptNumber}): ${error.message}`
+        );
       },
-    }).catch((error) => {
-      /* c8 ignore next */
-      if (error.status !== 404) throw error;
-
-      // https://docs.github.com/rest/apps/apps?apiVersion=2022-11-28#get-a-user-installation-for-the-authenticated-app
-      return request("GET /users/{username}/installation", {
-        username: parsedOwner,
-        headers: {
-          authorization: `bearer ${appAuthentication.token}`,
-        },
-      });
-    });
-
-    // Get token for for all repositories of the given installation
-    authentication = await auth({
-      type: "installation",
-      installationId: response.data.id,
+      retries: 3,
     });
   }
 
@@ -129,3 +109,51 @@ export async function main(
     core.saveState("token", authentication.token);
   }
 }
+
+async function getTokenFromOwner(request, auth, appAuthentication, parsedOwner) {
+  // https://docs.github.com/en/rest/apps/apps?apiVersion=2022-11-28#get-an-organization-installation-for-the-authenticated-app
+  const response = await request("GET /orgs/{org}/installation", {
+    org: parsedOwner,
+    headers: {
+      authorization: `bearer ${appAuthentication.token}`,
+    },
+  }).catch((error) => {
+    /* c8 ignore next */
+    if (error.status !== 404) throw error;
+
+    // https://docs.github.com/rest/apps/apps?apiVersion=2022-11-28#get-a-user-installation-for-the-authenticated-app
+    return request("GET /users/{username}/installation", {
+      username: parsedOwner,
+      headers: {
+        authorization: `bearer ${appAuthentication.token}`,
+      },
+    });
+  });
+
+  // Get token for for all repositories of the given installation
+  const authentication = await auth({
+    type: "installation",
+    installationId: response.data.id,
+  });
+  return authentication;
+}
+
+async function getTokenFromRepository(request, auth, parsedOwner,appAuthentication, parsedRepositoryNames) {
+  // 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],
+    headers: {
+      authorization: `bearer ${appAuthentication.token}`,
+    },
+  });
+
+  // Get token for given repositories
+  const authentication = await auth({
+    type: "installation",
+    installationId: response.data.id,
+    repositoryNames: parsedRepositoryNames.split(","),
+  });
+
+  return authentication;
+}