Terminal: Paste limited to 50 chars when run in Docker container on Windows

[dhirschfeld]

When pasting text into powershell in a Windows container the text is truncated at 50 characters which makes for a very frustrating and unproductive user experience.

This effect is most notable in powershell becaue of an unfortuante interaction with PSReadline however unusual/undersirable behaviour is also observed in a plain cmd terminal leading to (IIUC) the conclusion that the underlying problem is with the console itself.

This issue has been previously opened in 3 separate repositories:

• lzybkr/PSReadLine#460
• moby/moby#27793
• PowerShell/PowerShell#5501

...however I'm opening it here as all those issues have been closed under the assumption that the problem lies with the console itself

[dhirschfeld]

In the PSReadline issue @jstarks commented:

Agreed that this is annoying. We're hoping to improve the console API compatibility in windowsservercore in the next Windows release, which I suspect will resolve this and several other issues. Currently I don't have any plans to debug this with the current set of images, unfortunately.

My main goal in opening the issue here it so I can follow any progress in fixing the problem, and in particular if there is any estimated timeline for a fix being released.

[zadjii-msft]

This is technically an issue with Docker on Windows, but yes, we're working on a solution.

[flupkede]

It's just amazing that something as trivial as this is simply not working. Welcome old fashioned DOS!

[cblackuk]

@zadjii-msft Cannot wait for this to be fixed... it is so annoying... Any workaround in the interim?

[dhirschfeld]

See https://github.com/lzybkr/PSReadLine/issues/460#issuecomment-341733715 for a workaround.

[cblackuk]

@dhirschfeld Saved my life! Thanks a lot!

[cblackuk]

@dhirschfeld This allows me to paste fine but now you cannot go back a character or word it just deletes everything if you want to edit whatever you typed or pasted. Any workaround for that?

[zadjii-msft]

I'll defer back to @jstarks who is more familiar with Windows containers and might be able to share more information on the subject.

[DougPlumley]

No updates on this huh? Still seems to be an issue.

[zadjii-msft]

Actually @jstarks might be able to comment on this. There should be a fix going in to CExecSvc (which powers docker server on windows) to fix this, but I'm not really sure about their release schedule.

[jsturtevant]

This is fixed on the Windows 2019 preview image. You can try it out on azure:

[dhirschfeld]

Will that fix make it to 1803 or 1809?

[zadjii-msft]

I'd presume it's only for 1809. I don't think the Docker team was able to use our work for #57 in 1803.

[malcolm-boden]

Is there any of this working on 1607 ?

[zadjii-msft]

@malcolm-boden Nope, conpty support was only added in 1809 (October 2018 release), so you'll have to upgrade to a newer version to get the fix.

[robe070]

Still in 1809 👎