add trims and udpate REAMDE

README.md

@@ -25,8 +25,13 @@ API_SECURITY_TOKEN = access_token
 NODE_PATH = src/scripts
 PORT = 9001
 ```
+*react-app-env* will automatically add `REACT_APP` prefix to each env variable expect:
+
+* PORT - dev server port
+* NODE_PATH - directory name to be resolved to the current directory as well as its ancestors, and searched for modules. It is [resolve.modulesDirectories](https://webpack.github.io/docs/configuration.html#resolve-modulesdirectories) for webpack. More details at node official doc ["Loading from the global folders"](https://nodejs.org/api/modules.html#modules_loading_from_the_global_folders)
+
+With this environment file defined above:
 
-With this environment file
 ```
 react-app-env start
 ```

__tests__/index.js

@@ -16,7 +16,7 @@ describe('parse env variables', () => {
       "REACT_APP_API_SECURITY_TOKEN": "access_token",
 
       "NODE_PATH": "/src",
-      "PORT": "9001",
+      "PORT": "9001"
     });
   });
 });

__tests__/variables.env

@@ -1,9 +1,9 @@
-GOOGLE_CLIENT_ID=XXX_YYY_ZZZ
+GOOGLE_CLIENT_ID = XXX_YYY_ZZZ
 
-API_PROTOCOL=http:
-API_HOST=localhost:9876
-API_PREFIX=api
-API_SECURITY_TOKEN=access_token
+API_PROTOCOL = http:
+API_HOST = localhost:9876
+API_PREFIX = api
+API_SECURITY_TOKEN = access_token
 
-NODE_PATH=/src
-PORT=9001
+NODE_PATH = /src
+PORT = 9001

lib/parse-env-file.js

@@ -17,14 +17,19 @@ const parseEnvFile = (file) => {
     const parts = row.split('=');
 
     if (parts[0] && parts[1]) {
-      let varName = null;
-      if (EXPECT_VARIABLES.indexOf(parts[0]) === -1) {
-        varName = `REACT_APP_${parts[0]}`.replace(/\s/g, '');
+      let varName = parts[0].trim();
+
+      if (varName.indexOf(' ') !== -1) {
+        throw new Error(`spaces are not allowed at evn var names. "${varName}"`);
+      }
+
+      if (EXPECT_VARIABLES.indexOf(varName) === -1) {
+        varName = `REACT_APP_${varName}`;
       } else {
-        varName = parts[0].replace(/\s/g, '');
+        varName = varName;
       }
 
-      variables[varName] = parts[1];
+      variables[varName] = parts[1].trim();
     }
 
     return variables;

package.json

@@ -4,7 +4,7 @@
   "description": "Run create-react-app application with env variables",
   "main": "lib/index.js",
   "scripts": {
-    "test": "babel -d ./ ./lib",
+    "test": "jest --coverage",
     "test-dev": "jest --coverage --watch"
   },
   "bin": {