Cannot generate addon with typescript

[mfeckie]

ember -v
ember-cli: 4.9.2
node: 18.12.1
os: darwin arm64

Executing ember addon demo -b @embroider/addon-blueprint --typescript results in

  create tests/integration/.gitkeep
  create tests/test-helper.ts
  create tests/unit/.gitkeep
  install addon ember-cli-typescript

🚧  Installing packages... This might take a couple of minutes.
Error creating new application. Removing generated directory `./demo`
Command failed with exit code 1: yarn add --dev ember-cli-typescript --non-interactive
error Running this command will add the dependency to the workspace root rather than the workspace itself, which might not be what you want - if you really meant it, make it explicit by running this command again with the -W flag (or --ignore-workspace-root-check).
yarn add v1.22.19

Running ember addon demo -b @embroider/addon-blueprint --typescript -W results in the same issue

Running ember addon v2-demo -b @embroider/addon-blueprint --typescript --ignore-workspace-root-check also has the same error

[simonihmig]

This just came up on Discord as well... it turned out that ember-cli ships with --typescript support starting at 4.9.0 (current stable), but a necessary fix (ember-cli/ember-cli#10048) to make it work within this blueprint was not merged in time, it is only available with 4.10.0-beta.0 (see https://github.com/ember-cli/ember-cli/releases/tag/v4.10.0-beta.0). Using that version should work!

[mfeckie]

Thanks