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Syncpack

Synchronise Node.js version in monorepo

Ensure engines.node version is identical in every package.

1. Add a custom type

I’ve chosen a name of nodeEngine but it can be anything you like.

.syncpackrc
{
  "customTypes": {
    "nodeEngine": {
      "path": "engines.node",
      "strategy": "version"
    }
  }
}

2. Look for mismatches

Perform a one-off check for every usage of engines.node in your monorepo.

Terminal window
syncpack list --types nodeEngine

If the versions are not identical, they can be synchronised to all use the highest of the semver versions currently in use.

Terminal window
syncpack fix-mismatches --types nodeEngine

3. Track them in future

Add your new custom type to your dependencyTypes at the root level. It is included in the list of all possible dependency types.

.syncpackrc
{
  "customTypes": {
    "nodeEngine": {
      "path": "engines.node",
      "strategy": "version"
    }
  },


  "dependencyTypes": [
    "dev"
    "nodeEngine"
    "peer"
    "prod"
  ]
}

Now when you run any syncpack command, engines.node will also be checked.

Terminal window
syncpack list

4. Relax the rules (optional)

If you don’t want the Node.js version to be identical in every package but do want them all to be compatible with each other, you can use a Same Range Version Group.

Note that you do have to list your customType in dependencyTypes for it to work within versionGroups#dependencyTypes or semverGroups#dependencyTypes.

.syncpackrc
{
  "customTypes": {
    "nodeEngine": {
      "path": "engines.node",
      "strategy": "version"
    }
  },


  "dependencyTypes": [
    "dev"
    "nodeEngine"
    "peer"
    "prod"
  ],


  "versionGroups": [
    {
      "dependencyTypes": ["nodeEngine"],
      "policy": "sameRange"
    }
  ]
}