[BUG] Disconcerting warnings and errors in blank Typescript template

Bug Report Quick Checklist

• I am on the latest version of Snowpack & all plugins. (3.3.4)
• I use package manager yarn (Fill in: npm, yarn, pnpm, etc).
• I run Snowpack on OS macOS (Fill in: Windows, Mac, Linux, etc).
• I run Snowpack on Node.js v12+ (14.8.0)

Describe the bug

The blank Typescript template gives several warnings/error messages. This is disconcerting for people who are new to Snowpack, and just trying it out…

To Reproduce

Read the README.md for details, but the outline is:

1. npx create-snowpack-app test26mar --template @snowpack/app-template-blank-typescript --use-yarn
2. see several deprecation warnings…
3. s/3.0.1/3.3.4/ in package.json
4. Deprecations go away when re-running yarn
5. yarn start gives a Rollup preventAssignment error even though Rollup is not (obviously) being used

Expected behavior

No errors or warnings from the npx or yarn start commands

Anything else?

Demo repo and README.md at: https://github.com/richb-hanover/SnowpackTest-26Apr

[richb-hanover]

Thank you for tracking all these items down. I appreciate that effort. Your analysis makes sense

I am enough of a “techie” to see the power of Snowpack. And I can muddle through. But I also remain a “naive user”, and see the bumps along the road - these will slow its adoption. (That’s why I put “Disconcerting warnings…” in the title. They’re not necessarily bugs, but they make a newcomer wonder if something bad happened, or if, perhaps, the whole project is unreliable.)

I can see you’re deeply knowledgeable about the Javascript ecosystem and with the Snowpack environment. But it would take me far longer to reach those same conclusions. (And longer, still, to actually make any PRs.)

So I point out these problems a) to ask if I’m “doing it wrong” or b) to show where Snowpack could be improved. Is there a better (more helpful) place to make these observations? Could these reports be improved?

Many thanks.

[richb-hanover]

The logs are in the README at: https://github.com/richb-hanover/SnowpackTest-26Apr and reproduced here…

Starting new Snowpack project

• On 26 Apr 2021, use npx with a blank typescript template to create new project.

• By default, this installs Snowpack 3.0.1. This generates the deprecated warnings (below).

• Manually changing to Snowpack 3.3.4 in the package.json file removes these warnings. The project seems to run fine.

• Using yarn start, see the second set (below) of Rollup warnings about preventAssignment even though the project doesn’t use Rollup.

√ github % npx create-snowpack-app test26mar --template @snowpack/app-template-blank-typescript --use-yarn
npx: installed 24 in 2.795s

  - Using template @snowpack/app-template-blank-typescript
  - Creating a new project in /Users/richb/github/test26mar
  - Installing package dependencies. This might take a couple of minutes.

warning package.json: No license field
warning ../package.json: No license field
warning No license field
warning snowpack > rollup > fsevents@2.1.3: "Please update to latest v2.3 or v2.2"
warning snowpack > pacote > @npmcli/run-script > node-gyp > request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
warning snowpack > pacote > @npmcli/run-script > node-gyp > request > har-validator@5.1.5: this library is no longer supported

  - Initializing git repo.

  - Success!

Quickstart:

  cd test26mar
  yarn start

All Commands:

  yarn install     Install your dependencies. (We already ran this one for you!)
  yarn start       Start your development server.
  yarn run build   Build your website for production.
  yarn test        Run your tests.

Error on initial start

√ test26mar % yarn start
yarn run v1.22.10
warning package.json: No license field
warning ../package.json: No license field
$ snowpack dev
[22:14:17] [snowpack] Welcome to Snowpack! Because this is your first time running
this project, Snowpack needs to prepare your dependencies. This is a one-time step
and the results will be cached for the lifetime of your project. Please wait...
[22:14:17] [snowpack] + canvas-confetti@1.4.0
[22:14:17] [esinstall:canvas-confetti] @rollup/plugin-replace: 'preventAssignment' currently defaults to false. It is recommended to set this option to `true`, as the next major version will default this option to `true`.
[22:14:17] [snowpack] Ready!
[22:14:17] [snowpack] Server started in 16ms.
[22:14:17] [snowpack] Local: http://localhost:8080
[22:14:17] [snowpack] Network: http://192.168.253.116:8080
[22:14:18] [@snowpack/plugin-typescript] 9:13:18 PM - Starting compilation in watch mode...
[22:14:19] [@snowpack/plugin-typescript] 9:13:19 PM - Found 0 errors. Watching for file changes.
⠏ watching for file changes...^C