🐛 BUG: Using `import.meta.hot` in comment causes build issues

Quick checklist

[X] I am using the latest version of Snowpack and all plugins.

What package manager are you using?

npm

What operating system are you using?

macOS

Describe the bug

Following the recommendations in this issue (https://github.com/snowpackjs/snowpack/issues/3621#issuecomment-907731004) I added import.meta.hot wherever I am using __SNOWPACK_ENV. However, because this is something I wasn't familiar with I thought it would be a good idea to document why I added import.meta.hot to the file so others knew.

Once I added a multi-line JS comment explaining the issue, I noticed our builds started failing with an obtuse error:

[11:30:59] [snowpack] ! building files...
[11:31:01] [snowpack] Build Result Error: There was a problem with a file build result.
[11:31:01] [snowpack] Parse error @:5:50
[11:31:01] [snowpack] Error: Parse error @:5:50
    at parse (/Users/brandonp/Sites/Other/betterdo-ui/node_modules/snowpack/node_modules/es-module-lexer/dist/lexer.cjs:1:402)
    at scanCodeImportsExports (/Users/brandonp/Sites/Other/betterdo-ui/node_modules/snowpack/lib/cjs/rewrite-imports.js:21:29)
    at transformEsmImports (/Users/brandonp/Sites/Other/betterdo-ui/node_modules/snowpack/lib/cjs/rewrite-imports.js:37:27)
    at Object.transformFileImports (/Users/brandonp/Sites/Other/betterdo-ui/node_modules/snowpack/lib/cjs/rewrite-imports.js:108:16)
    at FileBuilder.resolveImports (/Users/brandonp/Sites/Other/betterdo-ui/node_modules/snowpack/lib/cjs/build/file-builder.js:116:48)
    at async Object.loadUrl (/Users/brandonp/Sites/Other/betterdo-ui/node_modules/snowpack/lib/cjs/commands/dev.js:641:39)
    at async flushFileQueue (/Users/brandonp/Sites/Other/betterdo-ui/node_modules/snowpack/lib/cjs/build/process.js:191:24)
    at async Object.buildFiles (/Users/brandonp/Sites/Other/betterdo-ui/node_modules/snowpack/lib/cjs/build/process.js:226:5)
    at async build (/Users/brandonp/Sites/Other/betterdo-ui/node_modules/snowpack/lib/cjs/commands/build.js:11:5)
    at async Object.command (/Users/brandonp/Sites/Other/betterdo-ui/node_modules/snowpack/lib/cjs/commands/build.js:35:9)

After debugging it, I realized it was the import.meta.hot comment in our comment, after removing that comment our builds started succeeding again.

Current Outcome:

Adding comment like this /* import.meta.hot */ inside of a JS file causes build to fail

Current Workaround:

Adding comment like this /* imports meta.hot method */ inside of JS file causes build to succeed.

Expected Outcome:

Adding comment like this /* import.meta.hot */ does not cause build to fail.

Steps to reproduce

You can checkout my code here: https://github.com/brandon-pereira/betterdo-ui/commit/4d9b0f8e58f29029e842f351a1ce7990fba9a6b0

If you remove / split up import.meta.hot from the scripts/utilities/env.js file, npx snowpack build will succeed.

Here is how I fixed the issue: https://github.com/brandon-pereira/betterdo-ui/commit/9df97b7b854feb3ee10677832c53df8becc8f954

Link to minimal reproducible example (optional)

No response

FredKSchott / snowpack