Yarn throws "stdout is not a tty" in Git Bash

[IgorAufricht]

Do you want to request a feature or report a bug?
Bug.

What is the current behavior?
I tried installing yarn using the installation script from https://yarnpkg.com/en/docs/install#alternatives-tab (I'm on Windows, but I don't have admin rights, so I can't use the Windows installer). After downloading the script it fails:

$ curl -o- -L https://yarnpkg.com/install.sh | bash
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  6742    0  6742    0     0   1694      0 --:--:--  0:00:03 --:--:--  1701
Installing Yarn!
/c/Users/myuser/.yarn/bin/yarn
stdin is not a tty

When I try to run the install.sh file directly, I get the same error:

$ "./install.sh"
Installing Yarn!
/c/Users/myuser/.yarn/bin/yarn
stdout is not a tty

If the current behavior is a bug, please provide the steps to reproduce.

1. Download the install.sh file from https://yarnpkg.com/en/docs/install#alternatives-tab
2. Run from Git bash

What is the expected behavior?
It should install successfully.

Please mention your node.js, yarn and operating system version.
node.js v6.3.0
yarn v0.19.1
Windows 7 x64
git version 2.11.0.windows.3

[adamk33n3r]

same issue except on windows 10 and I used the installer .msi

[Daniel15]

Hmm strange. On Windows, I'd suggest installing using the installer (MSI file) or Chocolatey (choco install yarn).

[IgorAufricht]

@Daniel15 As I mentioned above, I don't have administrator right for the Windows machine, thus I can't use the installer (MSI file) nor Chocolatey (which I also need admin rights to install). Currently this is preventing me from updating yarn at all.

I was able to update yarn with the install script from 0.17 to 0.19.1 before.

[IgorAufricht]

Also when I try to download the tarball from here:
https://yarnpkg.com/docs/install/#alternatives-tab
the link to latest package points to 0.19.1 instead of 0.20:
https://yarnpkg.com/latest.tar.gz

[Daniel15]

0.20 is a release candidate, 0.19 is the stable release. Sent from my phone.

…

On Feb 2, 2017 2:43 AM, "IgorAufricht" ***@***.***> wrote: Also when I try to download the tarball from here: https://yarnpkg.com/docs/install/#alternatives-tab the link to latest package points to 0.19.1 instead of 0.20: https://yarnpkg.com/latest.tar.gz — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#2591 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAFnHXCmi3RGHFy98cb9nKr-JFKb4M8Nks5rYbNjgaJpZM4LxpOE> .

[IgorAufricht]

@Daniel15 Thanks, haven't noticed that.

I found out the same error happens when I try to redirect output of any yarn command:

$ yarn info lodash | grep lodash
stdout is not a tty

$ yarn list lodash | grep lodash
stdout is not a tty

$ yarn --version | grep 0
stdout is not a tty

This is on version 0.20.0.

[IgorAufricht]

Still happening with yarn 0.20.3.

[IgorAufricht]

And with yarn 0.21.3.

[Daniel15]

I just hit the same error in AppVeyor when trying to use Yarn within a shell script via Git Bash: https://ci.appveyor.com/project/kittens/yarn/build/1938/job/momtbo9wa2carunr. In my case, I could work around the issue by explicitly running yarn.cmd rather than yarn:

# Workaround for https://github.com/yarnpkg/yarn/issues/2591
case "$(uname -s)" in
  *CYGWIN*|MSYS*|MINGW*) yarn=yarn.cmd;;
  *) yarn=yarn;;
esac


eval $yarn run build

[Daniel15]

Simple repro:

yarn --version | cat

It does seem like winpty is causing something strange to happen, as it only throws the error when using winpty (which the yarn shell script does do):