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I am using npm as a build tool and so in my package.json, and some of my scripts depend on other scripts:
{
"test": "npm run lint && mocha"
}
This hardcodes the npm package manager into package.json. How can make this approach to expressing dependencies work with both npm and yarn?
686
Every yarn package must have a package. json file which yarn looks for in order to identify the package. This file configures the behavior of yarn while it is running inside that package. Yarn uses a yarn.
In my project, I have used both npm and yarn. For example, one of the modules did not install properly with npm, so I used yarn to install that module. For many other I used npm. All in the same project.
yarn run [script] [<args>] Running this command will execute the script named "test" in your package. json . You can pass additional arguments to your script by passing them after the script name. Running this command will execute jest -o --watch .
The Yarn maintainers recommend installing Yarn globally by using the NPM package manager, which is included by default with all Node. js installations. Use the -g flag with npm install to do this: sudo npm install -g yarn.
The $npm_execpath environment variable refers to the build tool, so just replace npm with the $npm_execpath:
{
"test": "$npm_execpath run lint && mocha"
}
Both npm test and yarn test will work, and will use the appropriate build tool.
139
While mjs' answer is great, there's also a small package that is purported to work on all environments including Windows: https://www.npmjs.com/package/yarpm
To use in a project, run yarn add yarpm --dev / npm i -D yarpm and then just use yarpm in your scripts like this:
{
"test": "yarpm run lint && mocha"
}
As the package README notes, you just need to make sure your commands would be suitable for passing through to either yarn or npm: you cannot use arguments/flags that only work on one package manager.
35
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