Implement npm-version with pnpm workspace support

[james-yeoman]

Contribution

• I'd be willing to implement this feature (contributing guide)

Describe the user story

As a developer, I want to be able to use the version command, so that I can handle version bumps in a single command.

As a developer, I want pnpm to implement the version command instead of passing through to npm, so that I can bump versions in a workspace context.

Describe the solution you'd like

npm has the version command, which is meant to be workspace-aware. However, it's not pnpm-workspace-aware, which means that in order to use it via pnpm, I have to do the following:

pnpm --filter <workspace_name> exec pnpm version <version bump type>

While this works to run the version command on a particular workspace, it's cumbersome (since the -w flag on the version command doesn't know about pnpm workspaces, and you have to use exec pnpm after filtering the workspace).

Additionally, npm has this 4 year old npm bug regarding the version command, which means that it won't handle committing the package.json change and tagging when using it on non-root packages (i.e. workspaces). It changes the package.json version field correctly, but that's all it accomplishes.

Ideally, pnpm would implement the version command, which would make it pnpm-workspace-aware, and also ensuring the aforementioned bug doesn't occur.

Describe the drawbacks of your solution

It's additional code with an admittedly small overall benefit for a package manager (even though it's an entirely isolated piece of functionality, and is highly unlikely to have code-churn).

Describe alternatives you've considered

The following works, but is overly cumbersome. Also requires a weird hack to fool version into thinking it's at the top level (creating an empty .git directory).

pushd <workspace filepath> && mkdir .git && npm version <version bump type> && rm -r .git && popd

The following would work, but again requires a weird hack to fool version into thinking it's at the top level. It also requires being defined in each workspace's package.json.

{
  //...
  "scripts": {
    //...
    "preversion": "mkdir .git",
    "bump": "npm version",
    "postversion": "rm -r .git",
  }
}