Read Replit DB URL from file

.semaphore/semaphore.yml

@@ -8,7 +8,7 @@ blocks:
   - name: Test
     task:
       jobs:
-        - name: Test
+        - name: Test (JWT)
           commands:
             - checkout
             - sem-version node 12
@@ -17,5 +17,14 @@ blocks:
             - cache store
             - npm run build --if-present
             - npm test
+        - name: Test (Repl Identity)
+          commands:
+            - checkout
+            - sem-version node 12
+            - cache restore
+            - npm install
+            - cache store
+            - npm run build --if-present
+            - USE_FILE=1 npm test
       secrets:
         - name: replit-database

index.js

@@ -1,4 +1,7 @@
 const fetch = require("node-fetch");
+const fs = require("fs");
+
+const replitDBFilename = "/tmp/replitdb"
 
 class Client {
   /**
@@ -7,7 +10,15 @@ class Client {
    */
   constructor(key) {
     if (key) this.key = key;
-    else this.key = process.env.REPLIT_DB_URL;
+    else {
+      // Try to read string from file, fall back to 
+      // environment variable if it doesn't exist
+      try {
+        this.key = fs.readFileSync(replitDBFilename, "utf8");
+      } catch (err) {
+        this.key = process.env.REPLIT_DB_URL;
+      }
+    }
   }
 
   // Native Functions

index.test.js

@@ -4,14 +4,15 @@ const Client = require("./index");
 let client;
 
 beforeAll(async () => {
-  const pass = process.env.JWT_PASSWORD;
-  const resp = await fetch("https://database-test-jwt.util.repl.co", {
+  const pass = process.env.USE_FILE ? process.env.RIDT_PASSWORD : process.env.JWT_PASSWORD;
+  const url = process.env.USE_FILE ? "https://database-test-ridt.util.repl.co" : "https://database-test-jwt.util.repl.co";
+  const resp = await fetch(url, {
     headers: {
       Authorization: "Basic " + btoa("test:" + pass),
     },
   });
-  const url = await resp.text();
-  client = new Client(url);
+  const token = await resp.text();
+  client = new Client(token);
   await client.empty();
 });