feat: log option parameter

README.md

@@ -229,6 +229,25 @@ createAppAuth({
 });
 ```
 
+</td></tr>
+  <tr>
+      <th>
+        <code>log</code>
+      </th>
+      <th>
+        <code>object</code>
+      </th>
+      <td>
+        You can pass in your preferred logging tool by passing <code>option.log</code> to the constructor. If you would like to make the log level configurable using an environment variable or external option, we recommend the console-log-level package. For example:
+
+```js
+createAppAuth({
+  clientId: 123,
+  clientSecret: "secret",
+  log: require("console-log-level")({ level: "info" }),
+});
+```
+
 </td></tr>
   </tbody>
 </table>

src/hook.ts

@@ -61,8 +61,8 @@ export async function hook(
           1000
       );
 
-      console.warn(error.message);
-      console.warn(
+      state.log.warn(error.message);
+      state.log.warn(
         `[@octokit/auth-app] GitHub API time and system time are different by ${diff} seconds. Retrying request with the difference accounted for.`
       );
 
@@ -86,6 +86,7 @@ export async function hook(
   endpoint.headers.authorization = `token ${token}`;
 
   return sendRequestWithRetries(
+    state,
     request,
     endpoint as EndpointOptions,
     createdAt
@@ -100,6 +101,7 @@ export async function hook(
  * @see https://github.com/octokit/auth-app.js/issues/65
  */
 async function sendRequestWithRetries(
+  state: State,
   request: RequestInterface,
   options: EndpointOptions,
   createdAt: string,
@@ -126,13 +128,13 @@ async function sendRequestWithRetries(
     ++retries;
 
     const awaitTime = retries * 1000;
-    console.warn(
+    state.log.warn(
       `[@octokit/auth-app] Retrying after 401 response to account for token replication delay (retry: ${retries}, wait: ${
         awaitTime / 1000
       }s)`
     );
     await new Promise((resolve) => setTimeout(resolve, awaitTime));
 
-    return sendRequestWithRetries(request, options, createdAt, retries);
+    return sendRequestWithRetries(state, request, options, createdAt, retries);
   }
 }

src/index.ts

@@ -37,7 +37,15 @@ export const createAppAuth: StrategyInterface = function createAppAuth(
     },
     options.installationId
       ? { installationId: Number(options.installationId) }
-      : {}
+      : {},
+    {
+      log: Object.assign(
+        {
+          warn: console.warn.bind(console),
+        },
+        options.log
+      ),
+    }
   );
 
   return Object.assign(auth.bind(null, state), {

src/types.ts

@@ -82,6 +82,10 @@ export type StrategyOptions = {
   request?: OctokitTypes.RequestInterface;
   cache?: Cache;
   timeDifference?: number;
+  log?: {
+    warn: (message: string, additionalInfo?: object) => any;
+    [key: string]: any;
+  };
 };
 
 export type StrategyOptionsWithDefaults = StrategyOptions & {
@@ -121,4 +125,11 @@ export type State = StrategyOptions & {
   installationId?: number;
   request: OctokitTypes.RequestInterface;
   cache: Cache;
+  log: {
+    debug: (message: string, additionalInfo?: object) => any;
+    info: (message: string, additionalInfo?: object) => any;
+    warn: (message: string, additionalInfo?: object) => any;
+    error: (message: string, additionalInfo?: object) => any;
+    [key: string]: any;
+  };
 };

test/index.test.ts

@@ -1243,9 +1243,12 @@ test("auth.hook(): handle 401 due to an exp timestamp in the past", async () =>
       };
     });
 
+  global.console.warn = jest.fn();
+
   const auth = createAppAuth({
     id: APP_ID,
     privateKey: PRIVATE_KEY,
+    log: global.console,
   });
 
   const requestWithMock = request.defaults({
@@ -1259,8 +1262,6 @@ test("auth.hook(): handle 401 due to an exp timestamp in the past", async () =>
     },
   });
 
-  global.console.warn = jest.fn();
-
   const promise = requestWithAuth("GET /app");
 
   const { data } = await promise;
@@ -1315,9 +1316,12 @@ test("auth.hook(): handle 401 due to an exp timestamp in the past with 800 secon
       };
     });
 
+  global.console.warn = jest.fn();
+
   const auth = createAppAuth({
     id: APP_ID,
     privateKey: PRIVATE_KEY,
+    log: global.console,
   });
 
   const requestWithMock = request.defaults({
@@ -1331,8 +1335,6 @@ test("auth.hook(): handle 401 due to an exp timestamp in the past with 800 secon
     },
   });
 
-  global.console.warn = jest.fn();
-
   const promise = requestWithAuth("GET /app");
 
   const { data } = await promise;
@@ -1385,9 +1387,12 @@ test("auth.hook(): handle 401 due to an iat timestamp in the future", async () =
       };
     });
 
+  global.console.warn = jest.fn();
+
   const auth = createAppAuth({
     id: APP_ID,
     privateKey: PRIVATE_KEY,
+    log: global.console,
   });
 
   const requestWithMock = request.defaults({
@@ -1401,8 +1406,6 @@ test("auth.hook(): handle 401 due to an iat timestamp in the future", async () =
     },
   });
 
-  global.console.warn = jest.fn();
-
   const promise = requestWithAuth("GET /app");
   const { data } = await promise;
 
@@ -1440,9 +1443,12 @@ test("auth.hook(): throw 401 error in app auth flow without timing errors", asyn
       },
     });
 
+  global.console.warn = jest.fn();
+
   const auth = createAppAuth({
     id: APP_ID,
     privateKey: PRIVATE_KEY,
+    log: global.console,
   });
 
   const requestWithMock = request.defaults({
@@ -1456,8 +1462,6 @@ test("auth.hook(): throw 401 error in app auth flow without timing errors", asyn
     },
   });
 
-  global.console.warn = jest.fn();
-
   try {
     await requestWithAuth("GET /app");
     throw new Error("Should not resolve");
@@ -1518,10 +1522,13 @@ test("auth.hook(): handle 401 in first 5 seconds (#65)", async () => {
       }
     );
 
+  global.console.warn = jest.fn();
+
   const auth = createAppAuth({
     id: APP_ID,
     privateKey: PRIVATE_KEY,
     installationId: 123,
+    log: global.console,
   });
 
   const requestWithMock = request.defaults({
@@ -1538,8 +1545,6 @@ test("auth.hook(): handle 401 in first 5 seconds (#65)", async () => {
     },
   });
 
-  global.console.warn = jest.fn();
-
   const promise = requestWithAuth("GET /repos/octocat/hello-world");
 
   // it takes 3 retries until a total time of more than 5s pass
@@ -1831,3 +1836,63 @@ test("id and installationId can be passed as options", async () => {
 
   expect(authentication.token).toEqual("secret123");
 });
+
+test("createAppAuth passed with log option", async () => {
+  const calls: String[] = [];
+
+  const mock = fetchMock
+    .sandbox()
+    .get("https://api.github.com/app", (_url, options) => {
+      const auth = (options.headers as { [key: string]: string | undefined })[
+        "authorization"
+      ];
+      const [_, jwt] = (auth || "").split(" ");
+      const payload = JSON.parse(atob(jwt.split(".")[1]));
+      if (payload.exp < 600) {
+        return {
+          status: 401,
+          body: {
+            message:
+              "'Expiration time' claim ('exp') must be a numeric value representing the future time at which the assertion expires.",
+            documentation_url: "https://developer.github.com/v3",
+          },
+          headers: {
+            date: new Date(Date.now() + 30000).toUTCString(),
+          },
+        };
+      }
+
+      return {
+        status: 200,
+        body: [],
+      };
+    });
+
+  const auth = createAppAuth({
+    id: APP_ID,
+    privateKey: PRIVATE_KEY,
+    log: {
+      warn: () => calls.push("warn"),
+    },
+  });
+
+  const requestWithMock = request.defaults({
+    request: {
+      fetch: mock,
+    },
+  });
+  const requestWithAuth = requestWithMock.defaults({
+    request: {
+      hook: auth.hook,
+    },
+  });
+
+  const promise = requestWithAuth("GET /app");
+
+  const { data } = await promise;
+
+  expect(data).toStrictEqual([]);
+  expect(mock.done()).toBe(true);
+
+  expect(calls).toStrictEqual(["warn", "warn"]);
+});