Use @octokit/auth-app (#15)

Duplicate of #14 to make some adjustments.

Co-authored-by: adoami <[email protected]>
Co-authored-by: edulop <[email protected]>

Author: 3 people

.github/workflows/publish.yml

@@ -2,7 +2,7 @@ name: Publish
 on:
   push:
     branches:
-      - master
+      - main
 
 jobs:
   publish:

.github/workflows/test.yml

@@ -2,7 +2,7 @@ name: Test
 on:
   push:
     branches-ignore:
-      - master
+      - main
 
 jobs:
   test:

package.json

@@ -1,6 +1,6 @@
 {
   "name": "github-app-token",
-  "version": "1.1.1",
+  "version": "1.2.0",
   "license": "MIT",
   "files": [
     "action.yml",
@@ -17,24 +17,25 @@
   "devDependencies": {
     "@actions/core": "^1.2.6",
     "@actions/github": "^4.0.0",
-    "@octokit/app": "^4.3.0",
+    "@octokit/auth-app": "^2.10.5",
     "@types/is-base64": "^1.1.0",
-    "@types/node": "^14.14.6",
-    "@typescript-eslint/eslint-plugin": "^4.6.0",
-    "@typescript-eslint/parser": "^4.6.0",
-    "@vercel/ncc": "^0.24.1",
-    "eslint": "^7.12.1",
-    "eslint-config-prettier": "^6.15.0",
+    "@types/jest": "^26.0.18",
+    "@types/node": "^14.14.11",
+    "@typescript-eslint/eslint-plugin": "^4.9.1",
+    "@typescript-eslint/parser": "^4.9.1",
+    "@vercel/ncc": "^0.25.1",
+    "eslint": "^7.15.0",
+    "eslint-config-prettier": "^7.0.0",
     "eslint-config-xo": "^0.33.1",
-    "eslint-config-xo-typescript": "^0.35.0",
+    "eslint-config-xo-typescript": "^0.36.0",
     "eslint-import-resolver-typescript": "^2.3.0",
     "eslint-plugin-import": "^2.22.1",
     "eslint-plugin-sort-destructure-keys": "^1.3.5",
     "eslint-plugin-typescript-sort-keys": "^1.5.0",
     "eslint-plugin-unicorn": "^23.0.0",
     "is-base64": "^1.1.0",
-    "prettier": "^2.1.2",
+    "prettier": "^2.2.1",
     "promise-retry": "^2.0.1",
-    "typescript": "^4.0.5"
+    "typescript": "^4.1.2"
   }
 }

src/fetch-installation-token.ts

@@ -0,0 +1,16 @@
+import { context, getOctokit } from "@actions/github";
+import { createAppAuth } from "@octokit/auth-app";
+
+export const fetchInstallationToken = async ({
+  appId,
+  privateKey,
+}: Readonly<{ appId: string; privateKey: string }>): Promise<string> => {
+  const app = createAppAuth({ appId, privateKey });
+  const authApp = await app({ type: "app" });
+  const octokit = getOctokit(authApp.token);
+  const {
+    data: { id: installationId },
+  } = await octokit.apps.getRepoInstallation(context.repo);
+  const installation = await app({ installationId, type: "installation" });
+  return installation.token;
+};

src/index.ts

@@ -1,40 +1,31 @@
-import {
-  error as logError,
-  getInput,
-  info,
-  setFailed,
-  setOutput,
-  setSecret,
-} from "@actions/core";
-import { context, getOctokit } from "@actions/github";
-import { App } from "@octokit/app";
+import { getInput, info, setFailed, setOutput, setSecret } from "@actions/core";
+
 import isBase64 from "is-base64";
 
+import { fetchInstallationToken } from "./fetch-installation-token";
+
 const run = async () => {
   try {
-    const id = Number(getInput("app_id", { required: true }));
+    const appId = getInput("app_id", { required: true });
     const privateKeyInput = getInput("private_key", { required: true });
     const privateKey = isBase64(privateKeyInput)
       ? Buffer.from(privateKeyInput, "base64").toString("utf8")
       : privateKeyInput;
-    const app = new App({ id, privateKey });
-    const jwt = app.getSignedJsonWebToken();
-    const octokit = getOctokit(jwt);
-    const {
-      data: { id: installationId },
-    } = await octokit.apps.getRepoInstallation(context.repo);
-    const token = await app.getInstallationAccessToken({
-      installationId,
+
+    const installationToken = await fetchInstallationToken({
+      appId,
+      privateKey,
     });
-    setSecret(token);
-    setOutput("token", token);
+
+    setSecret(installationToken);
+    setOutput("token", installationToken);
     info("Token generated successfully!");
   } catch (error: unknown) {
-    if (typeof error !== "string" && !(error instanceof Error)) {
-      throw new TypeError(`Caught error of unexpected type: ${typeof error}`);
+    if (typeof error === "string" || error instanceof Error) {
+      setFailed(error);
+    } else {
+      setFailed(`Caught error of unexpected type: ${typeof error}`);
     }
-
-    setFailed(error);
   }
 };