TS5094: Compiler option '--noEmit' may not be used with '--build'

[remcohaszing]

🔎 Search Terms

TS5094
TS5094 noEmit build

🕗 Version & Regression Information

• This is a crash

⏯ Playground Link

N/A, it’s a CLI bug

💻 Code

// An empty file will suffice, but let’s add a console.log to make more interesting.
console.log('hello')

// Now this is the interesting file
// tsconfig.json
{
  "compilerOptions": {
    "noEmit": true
  }
}

🙁 Actual behavior

This command behaves as tsc --noEmit

$ tsc --build

The --build and --noEmit options are mutually exclusive. I imagine --build is supposed to be mutually exclusive with the noEmit compiler option instead.

$ tsc --build --noEmit false
error TS5094: Compiler option '--noEmit' may not be used with '--build'.

🙂 Expected behavior

My preferred solution is that --build disables the noEmit compiler option.

Another option is that --build fails if noEmit is true.

Additional information about the issue

I think the tsc --build option is great. I prefer this over running tsc without it.

I also like the idea of running tsc without emitting anything. This is achieved by adding noEmit to tsconfig.json.

It’s unfortunate these two currently don’t play well together. As a workaround I now typically don’t use --build.

[fatcerberus]

Related to #53979. Apparently the two options aren't entirely mutually exclusive.

[fatcerberus]

This is a crash

This is not a crash.

[remcohaszing]

I’m going to close this as a duplicate of #53979. Maybe that issue should add TS5094 to the search terms.

This is not a crash.

Not really, but it felt the most accurate one from the options the issue template gave me.