chore: cleanup temp file at the end of the action

src/createGACFile.ts

@@ -17,19 +17,18 @@
 import { fileSync } from "tmp";
 import { writeSync, existsSync } from "fs";
 
-// Set up Google Application Credentials for use by the Firebase CLI
-// https://cloud.google.com/docs/authentication/production#finding_credentials_automatically
-export async function createGacFile(googleApplicationCredentials: string) {
+// creates file with GAC info if parameter is not already a path to a file
+// NOTE: no validation of the credential information is performed
+export async function createGacFile(gacInfo: string) {
   try {
-    if (existsSync(googleApplicationCredentials)) {
-      return googleApplicationCredentials;
+    if (existsSync(gacInfo)) {
+      return gacInfo;
     }
   }
   catch (e) {
-    console.log("debug: failed checking file existence with error %O", e);
-    // googleApplicationCredentials is not a path to a file
+    console.warn("unexpected error while validing GAC info. Interpreting provided info as credentials data.");
   }
   const tmpFile = fileSync({ postfix: ".json" });
-  writeSync(tmpFile.fd, googleApplicationCredentials);
+  writeSync(tmpFile.fd, gacInfo);
   return tmpFile.name;
 }

src/index.ts

@@ -22,7 +22,7 @@ import {
   startGroup,
 } from "@actions/core";
 import { context, getOctokit } from "@actions/github";
-import { existsSync } from "fs";
+import { existsSync, unlinkSync } from "fs";
 import { createGacFile } from "./createGACFile";
 import {
   deployPreview,
@@ -51,7 +51,7 @@ const firebaseToolsVersion = getInput("firebaseToolsVersion");
 
 async function run() {
   try {
-    startGroup("Verifying firebase.json exists");
+    startGroup("Verifying setup parameters");
 
     if (entryPoint !== ".") {
       console.log(`Changing to directory: ${entryPoint}`);
@@ -61,21 +61,15 @@ async function run() {
         throw Error(`Error changing to directory ${entryPoint}: ${err}`);
       }
     }
-
     if (existsSync("./firebase.json")) {
       console.log("firebase.json file found. Continuing deploy.");
     } else {
       console.warn("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");
-    console.log("validating passed credentials: %s", googleApplicationCredentials);
     const gacFilename = await createGacFile(googleApplicationCredentials);
-    console.log("generated credentials: %s", gacFilename)
     if (gacFilename !== googleApplicationCredentials) {
       console.log(
-        "Created a temporary file with Application Default Credentials."
+        "Created a temporary file with Google Application Credentials."
       );
     }
     endGroup();
@@ -90,6 +84,11 @@ async function run() {
       await deployToPreviewChannel(gacFilename, channelId);
       endGroup();
     }
+
+    // cleanup
+    if (gacFilename !== googleApplicationCredentials) {
+      unlinkSync(gacFilename);
+    }
   } catch (e) {
     setFailed(e.message);
   }