Yarn Install Dev Dependencies

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If you you install a package with the --dev option, the dependency is added the the devDependencies section in package.json: $ yarn add gulp --dev The following result will be available in package.json. Dependencies in Yarn are kept in a yarn.lock file that should be checked-in your source control, but the file itself is for Yarn only and shouldn’t be edited. Here just enough to get your started with Yarn. Yarn licenses ls — Allows you to inspect the licenses of your dependencies yarn licenses generate-disclaimer — Automatically create your license dependency disclaimer yarn why taco — Identify why ‘taco’ package is installed, detailing which other packages depend upon it (thanks Olivier Combe ).

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commented Oct 29, 2016

bug

So I have been trying to install this package redux-immutable-state-invariant with yarn.
I am using yarn add redux-immutable-state-invariant --dev. So, it correctly installs it in the dev dependencies but the issue is that when I import it in the file it gives me an error that says it can't resolve the path for the package.

So, looking into the issue myself I figured out that I am getting two different builds when I install it with yarn and with npm directly.

Also, be noted that when I install it with npm it works fine and doesn't give me a path issue. I am attaching screenshots for both directories in the node_modules package after installation.

With Yarn
See, no dist directory

With npm

commented Oct 30, 2016

yarn add redux-immutable-state-invariant --dev😕

BTW, please try to follow the issue template. It will make life easier for everyone.

Please mention your node.js, yarn and operating system version.

commented Oct 30, 2016

Ah, sorry about the issue template. I'll be surely strict about that in future.

I am still having this issue though.

node.js version: 6.9.1
OS: ubuntu 16
yarn: 0.16.1

Did you try this out on OSX? Because it works fine there for me as well.

commented Oct 30, 2016

@laumair yeah, I tried in macOS.

commented Oct 30, 2016

@torifat Hmmm. Not sure what the issue is then.

commented Oct 31, 2016

I just tried in Ubuntu 16.04. And, it's working as expected.

Can you yarn cache clean and try again?

commented Oct 31, 2016

Yarn Install Dev Dependencies

@torifat after cleaning cache it works smooth. Thanks for testing it on your end as well and clearing out the issue. 👍

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Yarn Install Dev Dependencies

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Yarn Install Dev Dependencies Npm

Comments

commented Nov 8, 2018

Do you want to request a feature or report a bug?
I think this is not really a bug, but just a wierd decision. So I request a feature.

What is the current behavior?
yarn install installs devDependencies of dependencies in my package.json
yarn install --prod avoids this, but it also doesn't install devDependencies in my package.json

What is the expected behavior?
I am definitely not developing the installed dependencies, but I want my own devDependencies to be installed. So I think this way is more convenient (in my opinion)

  • yarn install should install OWN devDependencies but not devDependencies of dependencies.
  • yarn install --prod should not install both own devDependencies and devDependencies of dependencies.
  • yarn install --some-option acts similar to yarn install but including devDependencies of dependencies (for somebody with their own edge cases).

Please mention your node.js, yarn and operating system version.
Node v10.11.0
Yarn v1.10.1
Windows 10 Pro

Yarn

added the triaged label Nov 8, 2018

commented Nov 8, 2018

yarn install should install OWN devDependencies but not devDependencies of dependencies.

That is how it works.

So my direct devDep left-pad is installed, my dependency's dependency is-online > got is installed, and my dependency's devDep is-online > ava is not installed.

If this isn't how it is working for you, I would run the yarn why command and see if something else happens to be depending on that package and causing it to be installed. Or if you can post a package.json that reproduces the issue I'd be happy to take a deeper look.

commented Nov 9, 2018

I created a repository for demonstration purpose:
https://github.com/hirikarate/issue-yarn-devDependencies

It is a monorepo using Yarn Workspace with the structrue like this:

After running yarn install on root folder, I find another version of module typescript installed inside tsutils dependency (at packages/web/node_modules/tsutils/node_modules/typescript), which causes error when linting my sourcecode in 'web' folder.

Standing at packages/web/node_modules/tsutils and executing yarn why typescript, it coldly replies:

[1/4] Why do we have the module 'typescript'..?
[2/4] Initialising dependency graph..
[3/4] Finding dependency..
[4/4] Calculating file sizes..
=> Found 'typescript@3.0.0-rc'
info Has been hoisted to 'typescript'
info This module exists because it's specified in 'devDependencies'.

I think the issue is here:

info This module exists because it's specified in 'devDependencies'.

commented Nov 21, 2018

Hi, what is your guess about this issue?

commented Nov 27, 2018

Hey @hirikarate sorry for the very slow reply. This got lost in my hundreds of Github notifications 😞

I don't think this has anything to do with devDependencies. The typescript that ends up in packages/web/node_modules/tsutils/node_modules/typescript shouldn't be there. Yarn even seems to know that from the yarn why and yarn list that don't even show it.

Interestingly, if you remove package/rest or remove rest's dependency on a different version of typescript, then yarn install again, the packages/web/node_modules/tsutils/node_modules/typescript folder will not be created. This must be some weird dependency resolution bug or something.

I'll try to debug into it as I find time..

added cat-bug and removed needs-confirmationtriaged labels Nov 27, 2018

commented Nov 27, 2018

Npm Install Dev Dependencies

Side note, i think yarn why typescript when you are in packages/web/node_modules/tsutils is basing it's listing on what it finds in tsutils's package.json, but in reality the typescript that is in that directory isn't even 3.0.0-rc, it is 2.9.2.

commented Nov 28, 2018

Yarn Install Devdependencies Of Dependencies

In mean time, my last resort is to remove the troublesome typescript with script

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Yarn Not Installing Dev Dependencies

commented May 31, 2019

Ran into same problem with monorepo setup with Lerna and Yarn workspaces. After upgrading Typescript to 3.5.1, tslint stopped working.
@hirikarate workaround helps for the time being.

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