feat: add support for custom .nuspectemplate file (#491)

* Added support for custom .nuspectemplate file.

* Update src/index.ts

---------

Co-authored-by: Sébastien Taylor <[email protected]>
Co-authored-by: David Sanders <[email protected]>

Author: 3 people

src/index.ts

@@ -130,7 +130,8 @@ export async function createWindowsInstaller(options: SquirrelWindowsOptions): P
     metadata.additionalFiles.push({ src: 'vk_swiftshader_icd.json', target: 'lib\\net45' });
   }
 
-  let templateData = await fs.readFile(path.join(__dirname, '..', 'template.nuspectemplate'), 'utf8');
+  const templatePath = options.nuspecTemplate || path.join(__dirname, '..', 'template.nuspectemplate');
+  let templateData = await fs.readFile(templatePath, 'utf8');
   if (path.sep === '/') {
     templateData = templateData.replace(/\\/g, '/');
     for (const f of metadata.additionalFiles) {

src/options.ts

@@ -13,6 +13,12 @@ export interface SquirrelWindowsOptions {
    * Defaults to the installer folder at the project root.
    */
   outputDirectory?: string;
+  /**
+   * The path to the .nuspectemplate file used by Squirrel.exe.
+   *
+   * Defaults to the bundled template.nuspectemplate.
+   */
+  nuspecTemplate?: string;
   /**
    * The local path to a `.gif` file to display during install.
    */