ERROR: There are no scenarios; must have at least one.

[wangfaxi1985]

i want use "yarn " in my npm project
when run shell " yarn " in the shell,
it throw "ERROR: There are no scenarios; must have at least one. "

what problem?

yarn --version
0.27
node -v
v6.9.5
uname -a
Linux wfx-pc 4.4.0-3-deepin-amd64 #1 SMP Deepin 4.4.30-2 (2016-12-01) x86_64 GNU/Linux

[OmerHerera]

@wangfaxi1985, please check again your yarn version, the latest version is 0.21.3 and the tagged version is 0.22.0-0.
Also check that you run yarn command in the folder where your package.jsonis located
Thanks

[OmerHerera]

@wangfaxi1985, please check again your yarn version, the latest version is 0.21.3 and the tagged version is 0.22.0-0.
Also check that you run yarn command in the folder where your package.jsonis located
Thanks

[Daniel15]

You've got the wrong yarn 😄 The Yarn you're executing comes from the cmdtest package: http://manpages.ubuntu.com/manpages/xenial/man1/yarn.1.html. Uninstalling cmdtest should fix this. Once you've uninstalled it, follow the instructions on https://yarnpkg.com/en/docs/install#linux-tab to add the Yarn repo:

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt update
sudo apt install yarn

[Daniel15]

You've got the wrong yarn 😄 The Yarn you're executing comes from the cmdtest package: http://manpages.ubuntu.com/manpages/xenial/man1/yarn.1.html. Uninstalling cmdtest should fix this. Once you've uninstalled it, follow the instructions on https://yarnpkg.com/en/docs/install#linux-tab to add the Yarn repo:

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt update
sudo apt install yarn

[becdetat]

cmdtest seems to be installed by default on Ubuntu 17.04 at least, so perhaps this should be added to the installation instructions...

For anyone that finds this, if you're getting an error on sudo apt-get install yarn run sudo apt remove cmdtest first.

[becdetat]

cmdtest seems to be installed by default on Ubuntu 17.04 at least, so perhaps this should be added to the installation instructions...

For anyone that finds this, if you're getting an error on sudo apt-get install yarn run sudo apt remove cmdtest first.

[peter-kehl]

On Ubuntu (at least 17.04), after you sudo apt remove cmdtest, first follow https://yarnpkg.com/en/docs/install#linux-tab > Ubuntu. Only then sudo apt-get install yarn. If you don't follow https://yarnpkg.com/en/docs/install#linux-tab, then running sudo apt-get install yarn will install cmdtest again.

[peter-kehl]

On Ubuntu (at least 17.04), after you sudo apt remove cmdtest, first follow https://yarnpkg.com/en/docs/install#linux-tab > Ubuntu. Only then sudo apt-get install yarn. If you don't follow https://yarnpkg.com/en/docs/install#linux-tab, then running sudo apt-get install yarn will install cmdtest again.

[istals]

On Ubuntu 17.10 I'm not able to install yarn - I removed cmdtest package, but sudo apt-get install yarn reinstall cmdtest.

[istals]

On Ubuntu 17.10 I'm not able to install yarn - I removed cmdtest package, but sudo apt-get install yarn reinstall cmdtest.

[yuqingc]

@istals I have the same problem as you do. The cmdtest is still installed even if I remove it firstly. How do I get yarn on Ubuntu 17.10?

[yuqingc]

@istals I have the same problem as you do. The cmdtest is still installed even if I remove it firstly. How do I get yarn on Ubuntu 17.10?

[jdorleans]

For Ubuntu 17.10, try the workaround:

sudo apt remove cmdtest
sudo apt install npm
sudo npm install -g yarn

[jdorleans]

For Ubuntu 17.10, try the workaround:

sudo apt remove cmdtest
sudo apt install npm
sudo npm install -g yarn

[Daniel15]

For Ubuntu 17.10, you need to add the Yarn repo first.

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt update
sudo apt remove cmdtest
sudo apt install yarn

Make sure you remove cmdtest if you have it installed.

Prefer this to installing via npm.

@jdorleans - you don't have to install npm if you're using Yarn :)

[Daniel15]

For Ubuntu 17.10, you need to add the Yarn repo first.

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt update
sudo apt remove cmdtest
sudo apt install yarn

Make sure you remove cmdtest if you have it installed.

Prefer this to installing via npm.

@jdorleans - you don't have to install npm if you're using Yarn :)

[yuqingc]

@jdorleans Thanks for your comment. I have successfully installed yarn by using npm install -g yarn.

[yuqingc]

@jdorleans Thanks for your comment. I have successfully installed yarn by using npm install -g yarn.

[sheerun]

Ubuntu: let's name binary of node package nodejs, but also let cmdtest binary be yarn

[sheerun]

Ubuntu: let's name binary of node package nodejs, but also let cmdtest binary be yarn

[cserpell]

This would be much easier if instead of installing it as root, it was installed in user space.

[cserpell]

This would be much easier if instead of installing it as root, it was installed in user space.

[Daniel15]

@cserpell You can do that if you like. There's an install script you can use, or you could just download the Yarn tarball and extract it wherever you want. Details are on the site. Regardless, you're still going to have the issue of having multiple different multiple yarn binaries if you have cmdtest installed.

@sheerun To be fair, cmdtest used the yarn command first, before Yarn even existed.

[Daniel15]

@cserpell You can do that if you like. There's an install script you can use, or you could just download the Yarn tarball and extract it wherever you want. Details are on the site. Regardless, you're still going to have the issue of having multiple different multiple yarn binaries if you have cmdtest installed.

@sheerun To be fair, cmdtest used the yarn command first, before Yarn even existed.

[cserpell]

@Daniel15 That's what I did, specially because I cannot install programs where I am working. The trick is just overriding any installed binary with my own bin directory.

[cserpell]

@Daniel15 That's what I did, specially because I cannot install programs where I am working. The trick is just overriding any installed binary with my own bin directory.

[egonyuri]

I was having the same problem on Ubuntu 18.04 however I was able to fix using the following commands:

sudo apt remove cmdtest
sudo apt remove yarn
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt update
sudo apt install yarn

[egonyuri]

I was having the same problem on Ubuntu 18.04 however I was able to fix using the following commands:

sudo apt remove cmdtest
sudo apt remove yarn
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt update
sudo apt install yarn

[Nazarah]

@Daniel15 I followed your instructions in previous comment and tried to reinstall yarn again.

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt update
sudo apt install yarn

after checking the version, i found the version to be 1.5.1
Is it ok? Or I did something wrong.
Also would it create any problem if I uninstall cmdtest and all its dependencies?

[Nazarah]

@Daniel15 I followed your instructions in previous comment and tried to reinstall yarn again.

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt update
sudo apt install yarn

after checking the version, i found the version to be 1.5.1
Is it ok? Or I did something wrong.
Also would it create any problem if I uninstall cmdtest and all its dependencies?

[Daniel15]

@Nazarah - That's correct, 1.5.1 is the latest stable version. If you want to get 1.6.0, you need to add the RC repo instead (replace "stable" with "rc" in /etc/apt/sources.list.d/yarn.list)

[Daniel15]

@Nazarah - That's correct, 1.5.1 is the latest stable version. If you want to get 1.6.0, you need to add the RC repo instead (replace "stable" with "rc" in /etc/apt/sources.list.d/yarn.list)

[Nazarah]

@Daniel15
unintalling cmdtest and dependency and installing yarn.txt

The 1st text file shows commad results from uninstalling cmdtest and all its dependencies till using your suggested commands to install yarn

installing yarn fresh.txt

this files shows when I tried to run yarn from home

[Nazarah]

@Daniel15
unintalling cmdtest and dependency and installing yarn.txt

The 1st text file shows commad results from uninstalling cmdtest and all its dependencies till using your suggested commands to install yarn

installing yarn fresh.txt

this files shows when I tried to run yarn from home

[Daniel15]

I edited my comment because I realised that 1.5.1 is the latest version of Yarn :)

[Daniel15]

I edited my comment because I realised that 1.5.1 is the latest version of Yarn :)

[Nazarah]

Thanks for your feedback. :D

[Nazarah]

Thanks for your feedback. :D

[Nazarah]

@OmerHerera

Also check that you run yarn command in the folder where your package.jsonis located

Do you mean package.json for mastarm?

[Nazarah]

@OmerHerera

Also check that you run yarn command in the folder where your package.jsonis located

Do you mean package.json for mastarm?

[florianeBhz]

@becdetat I have Ubuntu 17.04 installed but when I type yarn --version after installing yarn as recommended, i got this as message « yarn » is not installed yet.You can install by typing : sudo apt install cmdtest. Then I run sudo apt install cmdtest but it failled.

[florianeBhz]

@becdetat I have Ubuntu 17.04 installed but when I type yarn --version after installing yarn as recommended, i got this as message « yarn » is not installed yet.You can install by typing : sudo apt install cmdtest. Then I run sudo apt install cmdtest but it failled.

[Daniel15]

@florianeBhz You need to add the Yarn repo first:

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

Then you can sudo apt-get update && sudo apt-get install yarn

More details on the Yarn site: https://yarnpkg.com/en/docs/install#debian-stable

[Daniel15]

@florianeBhz You need to add the Yarn repo first:

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

Then you can sudo apt-get update && sudo apt-get install yarn

More details on the Yarn site: https://yarnpkg.com/en/docs/install#debian-stable

[benjaoming]

For your Debian package, consider either conflicting with cmdtest in the debian/control; add a diversion in case the cmdtest executable already exists; use the update-alternatives pattern described here: https://wiki.debian.org/DebianAlternatives

[benjaoming]

For your Debian package, consider either conflicting with cmdtest in the debian/control; add a diversion in case the cmdtest executable already exists; use the update-alternatives pattern described here: https://wiki.debian.org/DebianAlternatives

[Daniel15]

; use the update-alternatives pattern described here: wiki.debian.org/DebianAlternatives

Alternatives are for when you have multiple different apps that do the same thing. It's not for dealing with naming conflicts.

Having said that, adding a conflict with cmdtest seems reasonable. We can do that!

[Daniel15]

; use the update-alternatives pattern described here: wiki.debian.org/DebianAlternatives

Alternatives are for when you have multiple different apps that do the same thing. It's not for dealing with naming conflicts.

Having said that, adding a conflict with cmdtest seems reasonable. We can do that!

[davux]

As a side comment: Ubuntu devs seemed to consider that when the user types apt-get install foo, if foo doesn't exist but there's a command with that name provided by package bar, then it's a good idea to almost silently install package bar instead.

$ sudo apt-get install yarn
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'cmdtest' instead of 'yarn'
[...]
$ dpkg -S bin/yarn
cmdtest: /usr/bin/yarn

I personally think it's one of those cases when people think implementing a less strict behaviour will make people's life easier but really just complicates things because it introduces randomness (for example this issue).

[davux]

As a side comment: Ubuntu devs seemed to consider that when the user types apt-get install foo, if foo doesn't exist but there's a command with that name provided by package bar, then it's a good idea to almost silently install package bar instead.

$ sudo apt-get install yarn
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'cmdtest' instead of 'yarn'
[...]
$ dpkg -S bin/yarn
cmdtest: /usr/bin/yarn

I personally think it's one of those cases when people think implementing a less strict behaviour will make people's life easier but really just complicates things because it introduces randomness (for example this issue).