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restore cursor on error #337

Merged
merged 1 commit into from
Mar 10, 2021
Merged

restore cursor on error #337

merged 1 commit into from
Mar 10, 2021

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noerw
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@noerw noerw commented Feb 27, 2021

This fixes restoring the state of the cursor when an error occurs when detecting terminal size.
fixes #282

Piped stdin is still not handled correctly:
The problem here is, that with piped stdin, Cursor.Location() fails with io.EOF:

survey/terminal/cursor.go

Lines 106 to 109 in f45c05b

text, err := reader.ReadSlice(byte('R'))
if err != nil {
return nil, err
}

Subsequently, no input is read, and control commands printed instead of being applied.

I'm not exactly sure how a piped stdin differs from a terminal stdin, so I don't know how to fix this.
One step surely would be to change Cursor, so that it detects piped stdin, and switches to a NO-OP mode?

If this can't be fixed properly, the README should clearly state that using survey with piped stdin breaks the application.

@AlecAivazis
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Hey @noerw - thanks for hunting this down.

Unfortunately, i dont have a lot of time right now to hunt down a better way to address this so I'm fine with adding a notice to the README 👍

@AlecAivazis AlecAivazis merged commit c79c4a9 into AlecAivazis:master Mar 10, 2021
This was referenced Mar 10, 2021
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When .Ask fails, the terminal state isn’t restored
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