package.json
El fichero manifest de un paquete. Contient toda la metadata del paquete, incluyendo dependencies, titulo, autor, etcétera. Este es un estandar a través de todos gestores de paquetes de Node.JS, incluído pnpm.
engines
Puedes específicar la versión de Node y pnpm con la que tu aplicación trabaja:
{
"engines": {
"node": ">=10",
"pnpm": ">=3"
}
}
Durante el desarrollo local, pnpm siempre fallará con un mensaje de error si su versión no coincide con la especificada en el campo engines.
A menos que el usuario haya establecido un valor para engine-strict (ver .npmrc), este campo es solo indicativo y solo generará advertencias cuando su paquete esté instalado como una dependencia.
dependenciesMeta
Metainformación adicional utilizada para dependencias declaradas dentro de dependencies, opcionalDependenciesy devDependenceas.
dependenciesMeta.*.injected
If this is set to true for a local dependency, the package will be hard linked to the virtual store (node_modules/.pnpm) and symlinked from the virtual store to the modules directory.
If this is set to false or not set for a local dependency, the package will be symlinked directly from its location in the workspace to the module directory.
For instance, the following package.json in a workspace will create a symlink to button in the node_modules directory of card:
{
"name": "card",
"dependencies": {
"button": "workspace:1.0.0"
}
}
But what if button has react in its peer dependencies? If all projects in the monorepo use the same version of react, then no problem. But what if button is required by card that uses react@16 and form with react@17? Without using inject, you'd have to choose a single version of react and install it as dev dependency of button. But using the injected field you can inject button to a package, and button will be installed with the react version of that package.
So this will be the package.json of card:
{
"name": "card",
"dependencies": {
"button": "workspace:1.0.0",
"react": "16"
},
"dependenciesMeta": {
"button": {
"injected": true
}
}
}
button will be hard linked into the dependencies of card, and react@16 will be symlinked to the dependencies of card/node_modules/button.
And this will be the package.json of form:
{
"name": "form",
"dependencies": {
"button": "workspace:1.0.0",
"react": "17"
},
"dependenciesMeta": {
"button": {
"injected": true
}
}
}
button will be hard linked into the dependencies of form, and react@17 will be symlinked to the dependencies of form/node_modules/button.
In contrast to normal dependencies, injected ones are not symlinked to the destination folder, so they are not updated automatically, e.g. after running the build script. To update the hard linked folder contents to the latest state of the dependency package folder, call pnpm i again.
Note that the button package must have any lifecycle script that runs on install in order for pnpm to detect the changes and update it. For example, the package can be rebuilt on install: "prepare": "pnpm run build". Any script would work, even a simple unrelated command without side effects, like this: "prepare": "pnpm root".
peerDependenciesMeta
This field lists some extra information related to the dependencies listed in the peerDependencies field.
peerDependenciesMeta.*.optional
If this is set to true, the selected peer dependency will be marked as optional by the package manager. Therefore, the consumer omitting it will no longer be reported as an error.
For example:
{
"peerDependencies": {
"foo": "1"
},
"peerDependenciesMeta": {
"foo": {
"optional": true
},
"bar": {
"optional": true
}
}
}
Note that even though bar was not specified in peerDependencies, it is marked as optional. pnpm will therefore assume that any version of bar is fine. However, foo is optional, but only to the required version specification.
publishConfig
It is possible to override some fields in the manifest before the package is packed. The following fields may be overridden:
To override a field, add the publish version of the field to publishConfig.
For instance, the following package.json:
{
"name": "foo",
"version": "1.0.0",
"main": "src/index.ts",
"publishConfig": {
"main": "lib/index.js",
"typings": "lib/index.d.ts"
}
}
Will be published as:
{
"name": "foo",
"version": "1.0.0",
"main": "lib/index.js",
"typings": "lib/index.d.ts"
}
publishConfig.executableFiles
By default, for portability reasons, no files except those listed in the bin field will be marked as executable in the resulting package archive. The executableFiles field lets you declare additional fields that must have the executable flag (+x) set even if they aren't directly accessible through the bin field.
{
"publishConfig": {
"executableFiles": [
"./dist/shim.js"
]
}
}
publishConfig.directory
You also can use the field publishConfig.directory to customize the published subdirectory relative to the current package.json.
It is expected to have a modified version of the current package in the specified directory (usually using third party build tools).
In this example the
"dist"folder must contain apackage.json
{
"name": "foo",
"version": "1.0.0",
"publishConfig": {
"directory": "dist"
}
}
publishConfig.linkDirectory
- Por defecto: true
- Tipo: Boolean
When set to true, the project will be symlinked from the publishConfig.directory location during local development.
For example:
{
"name": "foo",
"version": "1.0.0",
"publishConfig": {
"directory": "dist"
"linkDirectory": true
}
}
pnpm.overrides
This field allows you to instruct pnpm to override any dependency in the dependency graph. This is useful to enforce all your packages to use a single version of a dependency, backport a fix, or replace a dependency with a fork.
Note that the overrides field can only be set at the root of the project.
An example of the "pnpm"."overrides" field:
{
"pnpm": {
"overrides": {
"foo": "^1.0.0",
"quux": "npm:@myorg/quux@^1.0.0",
"bar@^2.1.0": "3.0.0",
"qar@1>zoo": "2"
}
}
}
You may specify the package the overriden dependency belongs to by separating the package selector from the dependency selector with a ">", for example qar@1>zoo will only override the zoo dependency of qar@1, not for any other dependencies.
An override may be defined as a reference to a direct dependency's spec. This is achieved by prefixing the name of the dependency with a $:
{
"dependencies": {
"foo": "^1.0.0"
},
"pnpm": {
"overrides": {
"foo": "$foo"
}
}
}
The referenced package does not need to match the overridden one:
{
"dependencies": {
"foo": "^1.0.0"
},
"pnpm": {
"overrides": {
"bar": "$foo"
}
}
}
pnpm.packageExtensions
The packageExtensions fields offer a way to extend the existing package definitions with additional information. For example, if react-redux should have react-dom in its peerDependencies but it has not, it is possible to patch react-redux using packageExtensions:
{
"pnpm": {
"packageExtensions": {
"react-redux": {
"peerDependencies": {
"react-dom": "*"
}
}
}
}
}
The keys in packageExtensions are package names or package names and semver ranges, so it is possible to patch only some versions of a package:
{
"pnpm": {
"packageExtensions": {
"react-redux@1": {
"peerDependencies": {
"react-dom": "*"
}
}
}
}
}
The following fields may be extended using packageExtensions: dependencies, optionalDependencies, peerDependencies, and peerDependenciesMeta.
A bigger example:
{
"pnpm": {
"packageExtensions": {
"express@1": {
"optionalDependencies": {
"typescript": "2"
}
},
"fork-ts-checker-webpack-plugin": {
"dependencies": {
"@babel/core": "1"
},
"peerDependencies": {
"eslint": ">= 6"
},
"peerDependenciesMeta": {
"eslint": {
"optional": true
}
}
}
}
}
}
Together with Yarn, we maintain a database of packageExtensions to patch broken packages in the ecosystem. If you use packageExtensions, consider sending a PR upstream and contributing your extension to the @yarnpkg/extensions database.
pnpm.peerDependencyRules
pnpm.peerDependencyRules.ignoreMissing
pnpm will not print warnings about missing peer dependencies from this list.
For instance, with the following configuration, pnpm will not print warnings if a dependency needs react but react is not installed:
{
"pnpm": {
"peerDependencyRules": {
"ignoreMissing": ["react"]
}
}
}
Package name patterns may also be used:
{
"pnpm": {
"peerDependencyRules": {
"ignoreMissing": ["@babel/*", "@eslint/*"]
}
}
}
pnpm.peerDependencyRules.allowedVersions
Unmet peer dependency warnings will not be printed for peer dependencies of the specified range.
For instance, if you have some dependencies that need react@16 but you know that they work fine with react@17, then you may use the following configuration:
{
"pnpm": {
"peerDependencyRules": {
"allowedVersions": {
"react": "17"
}
}
}
}
This will tell pnpm that any dependency that has react in its peer dependencies should allow react v17 to be installed.
It is also possible to suppress the warnings only for peer dependencies of specific packages. For instance, with the following configuration react v17 will be only allowed when it is in the peer dependencies of the button v2 package or in the dependencies of any card package:
{
"pnpm": {
"peerDependencyRules": {
"allowedVersions": {
"button@2>react": "17",
"card>react": "17"
}
}
}
}
pnpm.peerDependencyRules.allowAny
allowAny is an array of package name patterns, any peer dependency matching the pattern will be resolved from any version, regardless of the range specified in peerDependencies. Por ejemplo:
{
"pnpm": {
"peerDependencyRules": {
"allowAny": ["@babel/*", "eslint"]
}
}
}
The above setting will mute any warnings about peer dependency version mismatches related to @babel/ packages or eslint.
pnpm.neverBuiltDependencies
This field allows to ignore the builds of specific dependencies. The "preinstall", "install", and "postinstall" scripts of the listed packages will not be executed during installation.
An example of the "pnpm"."neverBuiltDependencies" field:
{
"pnpm": {
"neverBuiltDependencies": ["fsevents", "level"]
}
}
pnpm.onlyBuiltDependencies
A list of package names that are allowed to be executed during installation. If this field exists, only the listed packages will be able to run install scripts.
Ejemplo:
{
"pnpm": {
"onlyBuiltDependencies": ["fsevents"]
}
}
pnpm.onlyBuiltDependenciesFile
Added in: v8.9.0
This configuration option allows users to specify a JSON file that lists the only packages permitted to run installation scripts during the pnpm install process. By using this, you can enhance security or ensure that only specific dependencies execute scripts during installation.
Ejemplo:
{
"dependencies": {
"@my-org/policy": "1.0.0"
},
"pnpm": {
"onlyBuiltDependenciesFile": "node_modules/@my-org/policy/onlyBuiltDependencies.json"
}
}
The JSON file itself should contain an array of package names:
[
"fsevents"
]
pnpm.allowedDeprecatedVersions
This setting allows muting deprecation warnings of specific packages.
Ejemplo:
{
"pnpm": {
"allowedDeprecatedVersions": {
"express": "1",
"request": "*"
}
}
}
With the above configuration pnpm will not print deprecation warnings about any version of request and about v1 of express.
pnpm.patchedDependencies
This field is added/updated automatically when you run pnpm patch-commit. It is a dictionary where the key should be the package name and exact version. The value should be a relative path to a patch file.
Ejemplo:
{
"pnpm": {
"patchedDependencies": {
"express@4.18.1": "patches/express@4.18.1.patch"
}
}
}
pnpm.allowNonAppliedPatches
When true, installation won't fail if some of the patches from the patchedDependencies field were not applied.
{
"pnpm": {
"patchedDependencies": {
"express@4.18.1": "patches/express@4.18.1.patch"
}
"allowNonAppliedPatches": true
}
pnpm.updateConfig
pnpm.updateConfig.ignoreDependencies
Sometimes you can't update a dependency. For instance, the latest version of the dependency started to use ESM but your project is not yet in ESM. Annoyingly, such a package will be always printed out by the pnpm outdated command and updated, when running pnpm update --latest. However, you may list packages that you don't want to upgrade in the ignoreDependencies field:
{
"pnpm": {
"updateConfig": {
"ignoreDependencies": ["load-json-file"]
}
}
}
Patterns are also supported, so you may ignore any packages from a scope: @babel/*.
pnpm.auditConfig
pnpm.auditConfig.ignoreCves
A list of CVE IDs that will be ignored by the pnpm audit command.
{
"pnpm": {
"auditConfig": {
"ignoreCves": [
"CVE-2022-36313"
]
}
}
}
pnpm.requiredScripts
Scripts listed in this array will be required in each project of the workspace. Otherwise, pnpm -r run <script name> will fail.
{
"pnpm": {
"requiredScripts": ["build"]
}
}
resolutions
Functionally identical to pnpm.overrides, this field is intended to make it easier to migrate from Yarn.
resolutions and pnpm.overrides get merged before package resolution (with pnpm.overrides taking precedence), which can be useful when you're migrating from Yarn and need to tweak a few packages just for pnpm.