Add entryPoint option

.github/workflows/deploy-preview.yml

@@ -28,5 +28,6 @@ jobs:
           firebaseServiceAccount: "${{ secrets.FIREBASE_SERVICE_ACCOUNT }}"
           expires: 30d
           projectId: action-hosting-deploy-demo
+          entryPoint: "./demo"
         env:
           FIREBASE_CLI_PREVIEWS: hostingchannels

.github/workflows/deploy-production.yml

@@ -18,5 +18,6 @@ jobs:
           expires: 30d
           channelId: live
           projectId: action-hosting-deploy-demo
+          entryPoint: "./demo"
         env:
           FIREBASE_CLI_PREVIEWS: hostingchannels

README.md

@@ -105,6 +105,10 @@ unless you know you want to deploy a certain branch to a long-lived channel (for
 example, you may want to deploy every commit from your `next` branch to a
 `preprod` channel)
 
+### `entryPoint` _{string}_
+
+The location of your [`firebase.json`](https://firebase.google.com/docs/cli#the_firebasejson_file) file. Defaults to `.` (the root of your repo).
+
 ---
 
 This GitHub Action is not an officially supported Google product

action.yml

@@ -42,3 +42,9 @@ inputs:
       "The preview channel id to deploy to. If you leave this blank, an channel
       id will be auto-generated per branch or PR"
     required: false
+  entryPoint:
+    description:
+      "The location of your firebase.json file, relative to the root of your
+      directory"
+    default: "."
+    required: false

firebase.json → demo/firebase.json

@@ -1,6 +1,6 @@
 {
   "hosting": {
-    "public": "demo",
+    "public": "public",
     "ignore": ["firebase.json", "**/.*", "**/node_modules/**"]
   }
 }

src/deploy.ts

@@ -72,7 +72,7 @@ async function execWithCredentials(
         },
         env: {
           ...process.env,
-          FIREBASE_DEPLOY_AGENT: 'action-hosting-deploy',
+          FIREBASE_DEPLOY_AGENT: "action-hosting-deploy",
           GOOGLE_APPLICATION_CREDENTIALS: gacFilename, // the CLI will automatically authenticate with this env variable set
         },
       }
@@ -94,15 +94,11 @@ async function execWithCredentials(
   return Buffer.concat(deployOutputBuf).toString("utf-8"); // output from the CLI
 }
 
-export async function deploy(
-  firebase: string,
-  gacFilename: string,
-  deployConfig: DeployConfig
-) {
+export async function deploy(gacFilename: string, deployConfig: DeployConfig) {
   const { projectId, expires, channelId } = deployConfig;
 
   const deploymentText = await execWithCredentials(
-    firebase,
+    "npx firebase-tools",
     ["hosting:channel:deploy", channelId],
     projectId,
     gacFilename
@@ -115,9 +111,9 @@ export async function deploy(
   return deploymentResult;
 }
 
-export async function deployProductionSite(firebase, gacFilename, projectId) {
+export async function deployProductionSite(gacFilename, projectId) {
   const deploymentText = await execWithCredentials(
-    firebase,
+    "npx firebase-tools",
     ["deploy", "--only", "hosting"],
     projectId,
     gacFilename

src/index.ts

@@ -22,11 +22,11 @@ import {
   startGroup,
 } from "@actions/core";
 import { context, GitHub } from "@actions/github";
+import { existsSync } from "fs";
+import { createCheck } from "./createCheck";
 import { createGacFile } from "./createGACFile";
-import { deploy, ErrorResult, deployProductionSite } from "./deploy";
+import { deploy, deployProductionSite, ErrorResult } from "./deploy";
 import { getChannelId } from "./getChannelId";
-import { installFirebaseCLI } from "./installFirebaseCLI";
-import { createCheck } from "./createCheck";
 import { postOrUpdateComment } from "./postOrUpdateComment";
 
 // Inputs defined in action.yml
@@ -39,6 +39,7 @@ const configuredChannelId = getInput("channelId");
 const isProductionDeploy = configuredChannelId === "live";
 const token = process.env.GITHUB_TOKEN || getInput("repoToken");
 const github = token ? new GitHub(token) : undefined;
+const entryPoint = getInput("entryPoint");
 
 async function run() {
   const isPullRequest = !!context.payload.pull_request;
@@ -49,21 +50,36 @@ async function run() {
   }
 
   try {
-    startGroup("Setting up Firebase");
-    const firebase = await installFirebaseCLI();
+    startGroup("Verifying firebase.json exists");
+
+    if (entryPoint !== ".") {
+      console.log(`Changing to directory: ${entryPoint}`);
+      try {
+        process.chdir(entryPoint);
+      } catch (err) {
+        throw Error(`Error changing to directory ${entryPoint}: ${err}`);
+      }
+    }
+
+    if (existsSync("./firebase.json")) {
+      console.log("firebase.json file found. Continuing deploy.");
+    } else {
+      throw Error(
+        "firebase.json file not found. If your firebase.json file is not in the root of your repo, edit the entryPoint option of this GitHub action."
+      );
+    }
     endGroup();
 
     startGroup("Setting up CLI credentials");
     const gacFilename = await createGacFile(googleApplicationCredentials);
+    console.log(
+      "Created a temporary file with Application Default Credentials."
+    );
     endGroup();
 
     if (isProductionDeploy) {
       startGroup("Deploying to production site");
-      const deployment = await deployProductionSite(
-        firebase,
-        gacFilename,
-        projectId
-      );
+      const deployment = await deployProductionSite(gacFilename, projectId);
       if (deployment.status === "error") {
         throw Error((deployment as ErrorResult).error);
       }
@@ -84,7 +100,7 @@ async function run() {
     const channelId = getChannelId(configuredChannelId, context);
 
     startGroup(`Deploying to Firebase preview channel ${channelId}`);
-    const deployment = await deploy(firebase, gacFilename, {
+    const deployment = await deploy(gacFilename, {
       projectId,
       expires,
       channelId,