feat: Add installDir property for NsisUpdater (#6907)

.changeset/curly-oranges-attack.md

@@ -0,0 +1,5 @@
+---
+"electron-updater": minor
+---
+
+Add installDir property for NsisUpdater. Now is it posible change install folder from AppUpdater.

docs/api/electron-builder.md

@@ -1599,6 +1599,9 @@ return path.join(target.outDir, <code>__${target.name}-${getArtifactArchName(arc
 <p>Currently false to prevent breaking the current API, but it should be changed to default true at some point that breaking changes are allowed.</p>
 </li>
 <li>
+<p><code id="AppUpdater-installDirectory">installDirectory</code> string | “undefined”- <em>NSIS updater only</em> - Install folder for NSIS updater</p>
+</li>
+<li>
 <p><code id="AppUpdater-currentVersion">currentVersion</code> SemVer - The current application version.</p>
 </li>
 <li>

packages/electron-updater/src/NsisUpdater.ts

@@ -16,6 +16,13 @@ import { URL } from "url"
 import { gunzipSync } from "zlib"
 
 export class NsisUpdater extends BaseUpdater {
+  /**
+   * Install dir
+   *
+   */
+  installDirectory: string | null = null
+
+
   constructor(options?: AllPublishOptions | null, app?: AppAdapter) {
     super(options, app)
   }
@@ -109,6 +116,11 @@ export class NsisUpdater extends BaseUpdater {
       args.push("--force-run")
     }
 
+    if (this.installDirectory) {
+      // maybe check if folder exists
+      args.push(`/D=${this.installDirectory}`)
+    }
+
     const packagePath = this.downloadedUpdateHelper == null ? null : this.downloadedUpdateHelper.packageFile
     if (packagePath != null) {
       // only = form is supported