feat: Allow product key configuration (#275)

readme.md

@@ -174,7 +174,7 @@ The example folder `./example` will be available as ` \\host.lan\Data`.
 
   By default, a user called `Docker` (with an empty password) is created during installation.
 
-  If you want to use different credentials, you can configure them (only BEFORE installation) in your compose file:
+  If you want to use different credentials, you can configure them in your compose file (only before installation):
 
   ```yaml
   environment:
@@ -197,7 +197,7 @@ The example folder `./example` will be available as ` \\host.lan\Data`.
 
 ### How do I select the keyboard layout?
 
-  If you want to use a keyboard layout or locale that is not the default for your selected language, before installation you can add  `KEYBOARD` and `REGION` variables like this:
+  If you want to use a keyboard layout or locale that is not the default for your selected language, you can add  `KEYBOARD` and `REGION` variables like this (before installation):
 
   ```yaml
   environment:
@@ -205,6 +205,15 @@ The example folder `./example` will be available as ` \\host.lan\Data`.
     KEYBOARD: "en-US"
   ```
 
+### How do I set the product key?
+
+  By default, an evaluation version of Windows will be installed, but if you have product key you can add a `KEY` variable like this (before installation):
+
+  ```yaml
+  environment:
+    KEY: "XXXXX-XXXXX-XXXXX-XXXXX-XXXXX"
+  ```
+
 ### How do I install a custom image?
 
   In order to download an unsupported ISO image, specify its URL in the `VERSION` environment variable:

src/define.sh

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 set -Eeuo pipefail
 
+: "${KEY:=""}"
 : "${WIDTH:=""}"
 : "${HEIGHT:=""}"
 : "${VERIFY:=""}"

src/install.sh

@@ -681,6 +681,11 @@ updateXML() {
     sed -i "s/SERVERSTANDARD<\/Value>/SERVER${EDITION^^}<\/Value>/g" "$asset"
   fi
 
+  if [ -n "$KEY" ]; then
+    sed -i '/<ProductKey>/,/<\/ProductKey>/d' "$asset"
+    sed -i "s/<\/UserData>/  <ProductKey>\n          <Key>${KEY}<\/Key>\n          <WillShowUI>OnError<\/WillShowUI>\n        <\/ProductKey>\n      <\/UserData>/g" "$asset"
+  fi
+
   return 0
 }