install subtheme not working (unexpected end of json input)

I'm not able to reproduce this bug. I've tried using node 23.4.0 but it compiles without errors. I'm using DDEV and Aljibe (https://github.com/Metadrop/ddev-aljibe/), but anyway it should work the same with any environment as long as the Artisan release and node are similar.

Can you try using Aljibe and/or DDEV? To discard problems on your local setup.

Thanks for reporting, that error seems related to popper bootstrap 5.3 dependency ("for positioning dropdowns, poppers, and tooltips"), theme dependency is the same as suggested per bootstrap "^2.11.8": https://git.drupalcode.org/project/artisan/-/blob/1.x/artisan_starterkit...

https://getbootstrap.com/docs/5.3/getting-started/introduction/

<script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.11.8/dist/umd/popper.min.js" integrity="sha384-I7E8VVD/ismYTF4hNIPjVp/Zjvgyol6VFvRkX/vR+Vc4jQkC+hVqc2pM8ODewa9r" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.min.js" integrity="sha384-0pUGZvbkm6XF6gxjEnlmuGrJXVbNuzT9qBBavbLwCsOGabYfZo0T0to5eqruptLy" crossorigin="anonymous"></script>

Genrated "package-lock.json" expected generation for popperjs:

"node_modules/@popperjs/core": {
      "version": "2.11.8",
      "resolved": "https://registry.npmjs.org/@popperjs/core/-/core-2.11.8.tgz",
      "integrity": "sha512-P1st0aksCrn9sGZhp8GMYwBnQsbvAWsZAX44oXNNvLHGqAOcoVxmjZiohstwQ7SqKnbR47akdNi+uleWD8+g6A==",
      "dev": true,
      "license": "MIT",
      "funding": {
        "type": "opencollective",
        "url": "https://opencollective.com/popperjs"
      }
    },

When that happens you should be able to manage it manually, command is just a helper that will try to simplify process. So if that happens new theme folder should exists either way, but you will have to enable serialization module dependency & default theme manually.

As tunic said, i'm not able to reproduce this bug either, feel free to change status if you found new details to replicate.

I just tried installing this theme for the first time, and I also got a failure at the compile step. Here is the output:

 [notice] Compiling theme, please wait...

In Process.php line 1182:

  The process "npm install" exceeded the timeout of 60 seconds.


Failed to run drush --include=web/themes/contrib/artisan artisan: exit status 1
➜  artisan npm -v
10.9.2

I tried installing the theme through the UI, but then got multiple errors like this:

Warning: file_get_contents(themes/custom/artisanal/build/js/bs-dropdown.js): Failed to open stream: No such file or directory in Drupal\system\Controller\JsAssetController->generateHash() (line 43 of core/lib/Drupal/Core/Asset/AssetGroupSetHashTrait.php).
Drupal\system\Controller\JsAssetController->generateHash() (Line: 184)
Drupal\system\Controller\AssetControllerBase->deliver()
call_user_func_array() (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 593)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 121)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext() (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 183)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 116)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 90)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 709)
Drupal\Core\DrupalKernel->handle() (Line: 19)

It also couldn't find script.js.

If I go to the subtheme folder and run npm install manually, this is the output:

➜  artisanal npm install
npm warn deprecated rimraf@3.0.2: Rimraf versions prior to v4 are no longer supported
npm warn deprecated stable@0.1.8: Modern JS already guarantees Array#sort() is a stable sort, so this library is deprecated. See the compatibility table on MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort#browser_compatibility
npm warn deprecated inflight@1.0.6: This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and powerful.
npm warn deprecated glob@7.2.3: Glob versions prior to v9 are no longer supported
npm warn deprecated @babel/plugin-proposal-object-rest-spread@7.20.7: This proposal has been merged to the ECMAScript standard and thus this plugin is no longer maintained. Please use @babel/plugin-transform-object-rest-spread instead.

added 833 packages, and audited 834 packages in 21s

102 packages are looking for funding
  run `npm fund` for details

5 vulnerabilities (2 low, 3 moderate)

To address all issues (including breaking changes), run:
  npm audit fix --force

Run `npm audit` for details.