feat: allow override env regex (#692)

README.md

@@ -161,6 +161,30 @@ module.exports = {
 };
 ```
 
+### Passing other environment variables
+
+If you want to pass other variables to the Docker container use the `env-regex` input to override the regular expression that is used to allow environment variables.
+
+In your workflow pass the environment variable and whitelist it by specifying the `env-regex`:
+
+```yml
+....
+jobs:
+  renovate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3.3.0
+      - name: Self-hosted Renovate
+        uses: renovatebot/github-action@v34.82.0
+        with:
+          configurationFile: example/renovate-config.js
+          token: ${{ secrets.RENOVATE_TOKEN }}
+          env-regex: "^(?:RENOVATE_\\w+|LOG_LEVEL|GITHUB_COM_TOKEN|NODE_OPTIONS|AWS_TOKEN)$"
+        env:
+          AWS_TOKEN: ${{ secrets.AWS_TOKEN }}
+```
+
 ## Troubleshooting
 
 ### Debug logging

action.yml

@@ -21,6 +21,11 @@ inputs:
       Use a lightweight renovate container without any third-party binaries.
       Defaults to true if not set.
     required: false
+  env-regex:
+    description: |
+      Override the environment variables which will be passsed into the renovate container.
+      Defaults to `^(?:RENOVATE_\\w+|LOG_LEVEL|GITHUB_COM_TOKEN|NODE_OPTIONS)$`
+    required: false
 runs:
   using: node16
   main: dist/index.js

src/input.ts

@@ -26,9 +26,11 @@ class Input {
   private readonly _configurationFile: Readonly<EnvironmentVariable>;
 
   constructor() {
+    const envRegexInput = core.getInput('env-regex');
+    const envRegex = envRegexInput ? new RegExp(envRegexInput) : this.options.envRegex;
     this._environmentVariables = new Map(
       Object.entries(process.env).filter(([key]) =>
-        this.options.envRegex.test(key)
+        envRegex.test(key)
       )
     );