added json possibility and modified readme for it

README.md

@@ -10,6 +10,8 @@ npm install
 
 To run the app, you have 3 choices :
 
-- Pass args directly in the command line `node tp1.js --configuration config.yml`
-- Use env var : first export the var `export FICHIER_DE_CONFIGURATION="config.yml"` then run `node tp1.js`
+- Pass args directly in the command line `node tp1.js --configuration $CONF_FILE`
+- Use env var : first export the var `export FICHIER_DE_CONFIGURATION="$CONF_FILE"` then run `node tp1.js`
 - Use file written in the source code by just running `node tp1.js`
+
+`$CONF_FILE` can be `config.yml` or `config.json`

config.json

+{
+  "name": "config",
+  "prod": false
+}

tp1.js

-const yaml = require('js-yaml');
-const fs = require('fs');
+import { load } from 'js-yaml';
+import { readFileSync } from 'fs';
 
 function readConfFile() {
   const args = process.argv;
@@ -13,12 +13,22 @@ function readConfFile() {
     confFile = 'config.yml';
   }
 
+  readFile(confFile);
+}
+
+function readFile(file) {
+  const fileExtension = file.split('.')[1];
+  if (fileExtension == 'yml') {
     try {
-    const result = yaml.load(fs.readFileSync(confFile));
+      const result = load(readFileSync(confFile));
       console.log(result);
     } catch (e) {
       console.error(e);
     }
+  } else if (fileExtension == 'json') {
+    const jsonFile = require('./' + file);
+    console.log(jsonFile);
+  }
 }
 
 readConfFile();