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;
+}

package.json

@@ -14,7 +14,8 @@
   "dependencies": {
     "@actions/core": "^1.10.1",
     "@octokit/auth-app": "^6.0.1",
-    "@octokit/request": "^8.1.4"
+    "@octokit/request": "^8.1.4",
+    "p-retry": "^6.1.0"
   },
   "devDependencies": {
     "ava": "^5.3.1",

tests/main-token-get-owner-set-repo-fail-response.test.js

@@ -0,0 +1,39 @@
+import { test } from "./main.js";
+
+// Verify `main` retry when  the GitHub API returns a 500 error.
+await test((mockPool) => {
+  process.env.INPUT_OWNER = 'actions'
+  process.env.INPUT_REPOSITORIES = 'failed-repo';
+  const owner = process.env.INPUT_OWNER
+  const repo = process.env.INPUT_REPOSITORIES
+  const mockInstallationId = "123456";
+
+  mockPool
+    .intercept({
+      path: `/repos/${owner}/${repo}/installation`,
+      method: "GET",
+      headers: {
+        accept: "application/vnd.github.v3+json",
+        "user-agent": "actions/create-github-app-token",
+        // Intentionally omitting the `authorization` header, since JWT creation is not idempotent.
+      },
+    })
+    .reply(500, 'GitHub API not available')
+
+    mockPool
+    .intercept({
+      path: `/repos/${owner}/${repo}/installation`,
+      method: "GET",
+      headers: {
+        accept: "application/vnd.github.v3+json",
+        "user-agent": "actions/create-github-app-token",
+        // Intentionally omitting the `authorization` header, since JWT creation is not idempotent.
+      },
+    })
+    .reply(
+      200,
+      { id: mockInstallationId },
+      { headers: { "content-type": "application/json" } }
+    );
+
+});

tests/main-token-get-owner-set-to-user-fail-response.test.js

@@ -0,0 +1,36 @@
+import { test } from "./main.js";
+
+// Verify `main` successfully obtains a token when the `owner` input is set (to a user), but the `repositories` input isn’t set.
+await test((mockPool) => {
+  process.env.INPUT_OWNER = "smockle";
+  delete process.env.INPUT_REPOSITORIES;
+
+  // Mock installation id request
+  const mockInstallationId = "123456";
+  mockPool
+    .intercept({
+      path: `/orgs/${process.env.INPUT_OWNER}/installation`,
+      method: "GET",
+      headers: {
+        accept: "application/vnd.github.v3+json",
+        "user-agent": "actions/create-github-app-token",
+        // Intentionally omitting the `authorization` header, since JWT creation is not idempotent.
+      },
+    })
+    .reply(500, 'GitHub API not available')
+    mockPool
+    .intercept({
+      path: `/orgs/${process.env.INPUT_OWNER}/installation`,
+      method: "GET",
+      headers: {
+        accept: "application/vnd.github.v3+json",
+        "user-agent": "actions/create-github-app-token",
+        // Intentionally omitting the `authorization` header, since JWT creation is not idempotent.
+      },
+    })
+    .reply(
+      200,
+      { id: mockInstallationId },
+      { headers: { "content-type": "application/json" } }
+    );
+});

tests/snapshots/index.js.md

@@ -56,6 +56,21 @@ Generated by [AVA](https://avajs.dev).
 
     ''
 
+## main-token-get-owner-set-repo-fail-response.test.js
+
+> stderr
+
+    ''
+
+> stdout
+
+    `owner and repositories set, creating token for repositories "failed-repo" owned by "actions"␊
+    Failed to create token for "failed-repo" (attempt 1): GitHub API not available␊
+    ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a`
+
 ## main-token-get-owner-set-repo-set-to-many.test.js
 
 > stderr
@@ -98,6 +113,21 @@ Generated by [AVA](https://avajs.dev).
     ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a`
 
+## main-token-get-owner-set-to-user-fail-response.test.js
+
+> stderr
+
+    ''
+
+> stdout
+
+    `repositories not set, creating token for all repositories for given owner "smockle"␊
+    Failed to create token for "smockle" (attempt 1): GitHub API not available␊
+    ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a`
+
 ## main-token-get-owner-set-to-user-repo-unset.test.js
 
 > stderr