[CLI] "@" character removed when it's first path character with --build

[GongT]

🔎 Search Terms

"cli", "tsc", "build mode", "path"

🕗 Version & Regression Information

• This changed between versions 3.0 and 3.1 (LOL) and continue to 5.9.2

⏯ Playground Link

https://github.com/GongT/issues/tree/typescript-path-at-char

💻 Code

# all this is ok
tsc -p @scoped/package/src
tsc -b xxx@yyy/package/src
cd @scoped ; tsc -p package/src

# this is not
tsc -b @scoped/package/src

🙁 Actual behavior

error TS5083: Cannot read file 'scoped/package/src'.

🙂 Expected behavior

It should read @scoped/package/src(/tsconfig.json)

Additional information about the issue

No response

[GongT]

And why I don't want to cd xxxx && tsc -b: vscode will not jump to file when I ctrl+click issues printed in this way. :(

[RyanCavanaugh]

@blah is unfortunately ambiguous when it comes after an -opt with an optional value. I'm not sure what the general convention here is -- we should probably support "@blah" as a means to opt out of file reading?

[GongT]

Sorry I did not understand what is ambiguous here 🤔. Maybe @blah already has some special meaning? (I did not find any documentation mentioning this, In fact I don't know how to find such thing in the doc LOL)

[RyanCavanaugh]

If you run tsc @args.txt, the behavior is to read args.txt and pretend that file was the commandline. So if you have "--help" in args.txt, running tsc @args.txt is the same as tsc --help