check-dependency-version-consistency

This CLI tool enforces the following aspects of consistency across a monorepo / yarn workspace:

1. Dependencies are on consistent versions. For example, every package in a workspace that has a dependency on eslint should specify the same version for it.
2. Dependencies on local packages use the local packages directly instead of older versions of them. For example, if one package package1 in a workspace depends on another package package2 in the workspace, package1 should request the current version of package2.

Motivation

• Supports a uniform developer experience. Like shared code formatting standards, consistent dependency versions reduce friction and make it easier for developers to jump around and work across packages in a monorepo.
• Discourages piecemeal upgrades. When possible, a dependency should be upgraded everywhere it exists in a monorepo at the same time. Upgrades are also simpler and easier to perform when fewer versions are present.
• Reduces unexpected behavior. Having old versions present can lead to confusion, e.g., a bug present in some parts of a monorepo but not others, or uncertainty about which version wins out when served to the browser.
• Cuts down on bundle size. Avoid serving excess dependency code to the browser.
• Saves disk space and installation time. Faster local development and CI.

Usage

To install:

yarn add --dev check-dependency-version-consistency

To run, use this command and optionally pass the path to the workspace root (where the package.json file containing workspaces is located):

yarn check-dependency-version-consistency .

If there are no inconsistencies, the program will exit with success.

If there are any inconsistencies, the program will exit with failure and output the mismatching versions.

Example

package.json (workspace root):

{
  "workspaces": ["*"],
  "scripts": {
    "lint": "npm-run-all --continue-on-error --aggregate-output --parallel lint:*",
    "lint:dependency-versions": "check-dependency-version-consistency .",
    "lint:dependency-versions:fix": "npm-run-all \"lint:dependency-versions --fix\""
  },
  "devDependencies": {
    "check-dependency-version-consistency": "*",
    "npm-run-all": "*"
  }
}

package1/package.json:

{
  "name": "package1",
  "devDependencies": {
    "eslint": "^8.0.0"
  },
  "dependencies": {
    "package2": "^0.0.0"
  }
}

package2/package.json:

{
  "name": "package2",
  "version": "1.0.0",
  "devDependencies": {
    "eslint": "^7.0.0"
  }
}

package3/package.json:

{
  "name": "package3",
  "devDependencies": {
    "eslint": "^7.0.0"
  }
}

Output:

Found 2 dependencies with mismatching versions across the workspace. Fix with `--fix`.
╔════════╤════════╤════════════════════╗
║ eslint │ Usages │ Packages           ║
╟────────┼────────┼────────────────────╢
║ ^8.0.0 │ 1      │ package1           ║
╟────────┼────────┼────────────────────╢
║ ^7.0.0 │ 2      │ package2, package3 ║
╚════════╧════════╧════════════════════╝
╔══════════╤════════╤══════════╗
║ package2 │ Usages │ Packages ║
╟──────────┼────────┼──────────╢
║ 1.0.0    │ 1      │ package2 ║
╟──────────┼────────┼──────────╢
║ ^0.0.0   │ 1      │ package1 ║
╚══════════╧════════╧══════════╝

Options

Name	Description
--fix	Whether to autofix inconsistencies (using latest version present).
--ignore-dep	Dependency to ignore mismatches for (option can be repeated).
--ignore-dep-pattern	RegExp of dependency names to ignore mismatches for (option can be repeated).
--ignore-package	Workspace package to ignore mismatches for (option can be repeated).
--ignore-package-pattern	RegExp of package names to ignore mismatches for (option can be repeated).
--ignore-path	Workspace-relative path of packages to ignore mismatches for (option can be repeated).
--ignore-path-pattern	RegExp of workspace-relative path of packages to ignore mismatches for (option can be repeated).

Related

• npm-package-json-lint — use this complementary tool to enforce that your dependency versions use consistent range types (i.e. prefer-caret-version-ranges, prefer-caret-version-devDependencies)

References

• Yarn Workspaces