replace config vars with env vars

config.yml

@@ -8,7 +8,7 @@ endpoints:
  - key: "Content-Type"
  value: "application/json"
  - key: "Authorization"
- value: "Bearer 1234567890"
+ value: "Bearer ${AUTH_TOKEN}"
  - name: "todos-post"
  path: "/todos"
  method: "POST"
@@ -18,7 +18,7 @@ endpoints:
  - key: "Content-Type"
  value: "application/json"
  - key: "Authorization"
- value: "Bearer 1234567890"
+ value: "Bearer ${AUTH_TOKEN}"
  - name: "posts"
  path: "/posts"
  method: "GET"

src/index.ts

@@ -1,11 +1,15 @@
+import "dotenv/config";
 import express from "express";
+import { parseConfig } from "./utils/config/parse-config";
 
 const app = express();
 
 const PORT = process.env.PORT || 6060;
 
 app.get("/", (req, res) => {
- res.send("Hello World");
+ const config = parseConfig("config.yml");
+
+ res.send(config);
 });
 
 app.listen(PORT, () => {

src/utils/config/parse-config.ts

@@ -4,8 +4,11 @@ import { Config } from "../../types/config";
 import { validateConfig } from "./validate-config";
 
 export const parseConfig = (filePath: string): Config => {
- const file = fs.readFileSync(filePath, "utf8");
- const config = YAML.parse(file);
+ const fileContents = fs
+ .readFileSync(filePath, "utf8")
+ .replace(/\$\{(.+?)\}/g, (match, name) => process.env[name] || match);
+
+ const config = YAML.parse(fileContents);
 
  const valid = validateConfig(config);