pnpm link local packages workaround

link-local.mjs

#!/usr/bin/node
import {spawn} from "child_process"
import fs from "fs"
import path from "path"

// mofified version of run from my utils lib https://github.com/AlansCodeLog/utils
async function run(command, cwd) {
	const parts = command.split(" ")

	const child = spawn(parts[0], [...parts.slice(1)], { cwd, shell: true })

	for await (const chunk of child.stdout) {
		console.log(chunk.toString())
	}
	for await (const chunk of child.stderr) {
		console.log(chunk.toString())
	}

	const code =  await new Promise(resolve => {
		child.on("close", resolve)
	})

	if (code !== 0) {
		process.exit(code)
	}
}

/**
*
* Workaround for https://github.com/pnpm/pnpm/issues/3584 that does not require making changes to the project.
*
* This requires having two environment variables set:
*
* - LINKABLE_PACKAGES, a list of packages we want to link to if used:
*
* ```sh
* export LINKABLE_PACKAGES="
* package1
* package2"
* ```
*
* - CODE_PROJECTS, the location of the packages
*
* This will then call `pnpm link $CODE_PROJECTS/{PACKAGENAME}` if the package uses the package as a dependency (dep, regular, or peer).
*
* Since regular pnpm link does not have issue 3583, this will work without modifying the package.json.
*/

async function main() {

	const packageJson = JSON.parse(fs.readFileSync(path.resolve(process.cwd(), "package.json")).toString())

	const linkable = (process.env.LINKABLE_PACKAGES ?? "").split("\\n").filter(entry => entry.trim() !== "")

	const toLink = []

	for (const type of ["dependencies", "devDependencies", "peerDependencies"]) {
		if (!packageJson[type]) continue
		const list = Object.keys(packageJson[type])

		for (const dep of list) {
			if (linkable.includes(dep)) {
				toLink.push(dep)
			}
		}
	}


	if (toLink.length > 0) {
		console.log("Will link:")
		console.log(toLink.join("\n"))

		const command = toLink.map(dep => `pnpm link $CODE_PROJECTS/${dep}`).join(" && ")
		await run(command)
	} else {
		console.log("Nothing to Link")
		console.log(`LINKABLE: ${linkable}`)
	}
}
main()