bin.js

#!/usr/bin/env node
const { defineCommand, runMain } = require("citty")
const path = require("node:path")
const fs = require("node:fs")

const pkgJson = require("./package.json")

const getFlavorPath = (flavor = "") =>
  path.resolve(__dirname, "examples", flavor ? `${flavor}.eslintrc.js` : "")

const files = fs
  .readdirSync(getFlavorPath())
  .filter((s) => s.includes(".eslintrc.js"))

const flavors = files.map((s) => s.replace(".eslintrc.js", ""))
const flavorsString = flavors.join(", ")

const addDependency = (packageName, version, dev = false) => {
  const packageJsonPath = "package.json"
  const packageJsonObj = JSON.parse(fs.readFileSync(packageJsonPath, "utf8"))

  const depKey = dev ? "devDependencies" : "dependencies"

  // biome-ignore lint/suspicious/noAssignInExpressions: <explanation>
  ;(packageJsonObj[depKey] ??= {})[packageName] = `^${version}`

  fs.writeFileSync(packageJsonPath, JSON.stringify(packageJsonObj, null, 2))
}

const setupEslint = (flavor, { force, js }) => {
  const filename = `.eslintrc.${js ? "js" : "cjs"}`

  if (fs.existsSync(filename) && !force)
    throw new Error(
      "There is already an .eslintrc.js in the directory! Use -f to overwrite.",
    )

  fs.copyFileSync(getFlavorPath(flavor), filename)

  addDependency("eslint-config-gev", pkgJson.version, true)
  console.log(
    'eslint-config-gev was added as a devDependency! Run "npm/yarn/pnpm/bun install" to install it!',
  )
}

const main = defineCommand({
  meta: {
    name: pkgJson.name,
    version: pkgJson.version,
    description: pkgJson.description,
  },
  args: {
    force: {
      type: "boolean",
      alias: "f",
      description: "Overwrites the existing '.eslintrc'",
    },
    js: {
      type: "boolean",
      description: "Use '.eslintrc.js' instead of '.eslintrc.cjs'",
    },
    flavor: {
      type: "positional",
      required: true,
      description: `Your project kind. One of these: ${flavorsString}`,
    },
  },
  run: ({ args: { flavor, force, js } }) => {
    if (!flavors.includes(flavor))
      throw new Error(`The flavor must be one of these: ${flavorsString}`)

    setupEslint(flavor, { force, js })
  },
})

runMain(main)