Accept input from stdin?

[prashcr]

I'm trying to get tslint working with a vim linter, however to do this I need to be able to pass input via stdin.
dense-analysis/ale#20

To my knowledge, all major JS linters support this feature (jshint, eslint, jscs).

[prashcr]

Ended up using a bash wrapper that buffers stdin to a temp file.

Would still be great if it supported stdin out of the box and I wouldn't mind helping out with that.

[adidahiya]

we'd accept a PR for this, but it might get a little complex due to the interactions with the compiler APIs.

[prashcr]

Thanks!

Will try to get something in over the next month or two.

On Tue, Oct 4, 2016 at 9:53 PM, Adi Dahiya notifications@github.com wrote:

we'd accept a PR for this, but it might get a little complex due to the
interactions with the compiler APIs.

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[rjmunro]

I thought that it was working, as when I typed tslint - < filename.ts I didn't get any errors, but it looks like the accpetance of - as a filename is a bug.

[ianks]

@prashcr This would be such an excellent feature! I am currently trying to configure https://github.com/sbdchd/neoformat to use tslint and am stumbling across some problems which this would solve.

[prashcr]

@ianks I agree!
Unfortunately I've been busy as of late, but I still see myself working on this sometime soon.

[tusharmath]

@adidahiya Do you think we can add a special flag to take input via stdin? For Eg:

$ git diff --name-only | tslint --fix --stdin

[ajafff]

@tusharmath for your example you could simply use xargs:

git diff --name-only | xargs tslint --fix

[tusharmath]

@ajafff Thanks a ton! You saved me a day :P BTW what's the use case of stdin in that case?

[ExplodingCabbage]

@tusharmath one use case (surely not the only one) is linting the output of git show :somefile (which outputs the staged form of :somefile) in a commit hook, so that if I've staged a linting error, then fixed it but not staged the fix, the hook will still fail when I try to commit. This is really how all good linting commit hooks should behave, but I figure that properly implementing this behaviour isn't possible at present with TSLint without doing funky stuff with temporary files or similar.

[w0rp]

I would like to add that in addition to supporting --stdin, a --stdin-filename option should be supported, like in ESLint. This allows linter plugins to pass the contents of text buffers in place of filenames, so you can spot errors before a file is saved.

You essentially replace tslint whatever.ts with tslint --stdin --stdin-filename whatever.ts and send the contents of the buffer to TSLint via stdin.

[sinisterstumble]

This would be really helpful 👍

[w0rp]

I'm going to give this a go. I'll create a pull request with the first thing I can think of at some point, and keep editing it until everything actually works.

[JoshuaKGoldberg]

💀 It's time! 💀

TSLint is being deprecated and no longer accepting pull requests for major new changes or features. See #4534. 😱

If you'd like to see this change implemented, you have two choices:

• Recommended: Check if this is available in ESLint + typescript-eslint ✅
• Not Recommended: Fork TSLint locally 🤷‍♂️

👋 It was a pleasure open sourcing with you!

If you believe this message was posted here in error, please comment so we can re-open the issue!

[JoshuaKGoldberg]

🤖 Beep boop! 👉 TSLint is deprecated 👈 (#4534) and you should switch to typescript-eslint! 🤖

🔒 This issue is being locked to prevent further unnecessary discussions. Thank you! 👋