Error "/usr/bin/yarn: [[: not found" with 0.24.0

[pichouk]

Using the latest yarn version 0.24.0

user@hostname:/tmp$ yarn --version
/usr/bin/yarn: 15: /usr/bin/yarn: [[: not found
0.24.0

Do you want to request a feature or report a bug?
Reporting a bug

What is the current behavior?
When I use the yarn command, it works but I always get this :

/usr/bin/yarn: 15: /usr/bin/yarn: [[: not found

Then my command is executed normally.

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

• Using Debian (testing) with 4.9.0-2 kernel.
• Install the deb package for Yarn 0.24.0. Not currently available on repository, find it here
• Use yarn command (eg. yarn --version)

What is the expected behavior?
It seems there is a problem with the Yarn "entrypoint" script. Did not investigate on it, I just report this before version 0.24.0 is pushed into APT repository.

I'm not sure, but the .deb package seems really light (580KB) comparing to previous versions (1.95MB). Maybe it is not generated well ?

[bestander]

Related to #3260 and #3245.
@Daniel15, do you know what trickery is this?

[Daniel15]

Hmm this is very weird. I thought [[ is a standard shell thing.

I think the issue is that we use /bin/sh instead of /bin/bash in the shebang (https://github.com/yarnpkg/yarn/blob/master/bin/yarn), and we're using stuff that is not portable across shells. It's likely your /bin/sh is another shell such as dash.

the .deb package seems really light (580KB) comparing to previous versions (1.95MB).

This is intentional due to #3030 :D
It's unrelated to this issue.

[Daniel15]

@bestander Simply changing the shebang in bin/yarn from #!/bin/sh to #!/bin/bash is probably enough to resolve this.

[pichouk]

On my configuration, I confirmed that it solved the issue.
Is that possible to add this on 0.24 version ?

[pichouk]

Should be fixed by merged PR #3362