Merge pull request #34 from falti/variable_expansion

Variable expansion

dotenv_action.js

@@ -7,15 +7,16 @@ let dotenv_action = function (dotenvFile) {
     }
 
     const dotenv = require('dotenv').config({ path: dotenvFile });
+    const dotenv_expand = require('dotenv-expand').expand(dotenv);
     console.log("loading .env file from " + dotenvFile);
 
     const returnedMap = {};
-    for (const key in dotenv.parsed) {
-        const value = dotenv.parsed[key];
+    for (const key in dotenv_expand.parsed) {
+        const value = dotenv_expand.parsed[key];
         const lowercase_key = key.toLocaleLowerCase()
         returnedMap[lowercase_key] = value;
     }
     return returnedMap;
 }
 
-module.exports = dotenv_action;
+module.exports = dotenv_action;

fixtures/.expand.env

@@ -0,0 +1,3 @@
+FIXTURES_3=xyz
+EXPANDED=123-${FIXTURES_3}
+EXPANDED_2=123-$FIXTURES_3

index.test.js

@@ -11,4 +11,9 @@ test('test runs with different path', () => {
 test('test runs with broken path', () => {
     const dotenv_action = require('./dotenv_action');
     expect(() => { dotenv_action("nosuchfile")}).toThrow(Error);
+})
+
+test('test runs with expanded values', () => {
+    const dotenv_action = require('./dotenv_action');
+    expect(dotenv_action("fixtures/.expand.env")).toEqual({ fixtures_3: "xyz", "expanded": "123-xyz", "expanded_2": "123-xyz" });
 })

package.json

@@ -25,7 +25,8 @@
   "homepage": "https://github.com/falti/dotenv-action#readme",
   "dependencies": {
     "@actions/core": "^1.9.1",
-    "dotenv": "^8.2.0"
+    "dotenv": "^8.2.0",
+    "dotenv-expand": "^8.0.3"
   },
   "devDependencies": {
     "@zeit/ncc": "^0.22.1",