.pnpmfile.cjs
pnpm lets you hook directly into the installation process via special functions
(hooks). Hooks can be declared in a file called .pnpmfile.cjs
.
By default, .pnpmfile.cjs
should be located in the same directory as the
lockfile. For instance, in a workspace with a shared lockfile,
.pnpmfile.cjs
should be in the root of the monorepo.
Hooks
TL;DR
Hook Function | Process | Uses |
---|---|---|
hooks.readPackage(pkg, context): pkg | Called after pnpm parses the dependency's package manifest | Allows you to mutate a dependency's package.json |
hooks.afterAllResolved(lockfile, context): lockfile | Called after the dependencies have been resolved. | Allows you to mutate the lockfile. |
hooks.readPackage(pkg, context): pkg | Promise<pkg>
Allows you to mutate a dependency's package.json
after parsing and prior to
resolution. These mutations are not saved to the filesystem, however, they will
affect what gets resolved in the lockfile and therefore what gets installed.
Note that you will need to delete the pnpm-lock.yaml
if you have already
resolved the dependency you want to modify.
If you need changes to package.json
saved to the filesystem, you need to use the pnpm patch
command and patch the package.json
file.
This might be useful if you want to remove the bin
field of a dependency for instance.
Arguments
pkg
- The manifest of the package. Either the response from the registry or thepackage.json
content.context
- Context object for the step. Method#log(msg)
allows you to use a debug log for the step.
Usage
Example .pnpmfile.cjs
(changes the dependencies of a dependency):
function readPackage(pkg, context) {
// Override the manifest of foo@1.x after downloading it from the registry
if (pkg.name === 'foo' && pkg.version.startsWith('1.')) {
// Replace bar@x.x.x with bar@2.0.0
pkg.dependencies = {
...pkg.dependencies,
bar: '^2.0.0'
}
context.log('bar@1 => bar@2 in dependencies of foo')
}
// This will change any packages using baz@x.x.x to use baz@1.2.3
if (pkg.dependencies.baz) {
pkg.dependencies.baz = '1.2.3';
}
return pkg
}
module.exports = {
hooks: {
readPackage
}
}