initialize deno with vscode settings, no semicolon, and line width 100

initdeno.ts

#!/usr/bin/env -S deno run --allow-read --allow-write --allow-run --allow-env --unstable

import { Command } from "https://deno.land/x/cliffy@v0.25.7/command/mod.ts"
import { dirname, join } from "https://deno.land/std@0.190.0/path/mod.ts"
import { c, p } from "https://deno.land/x/copb@v1.0.1/mod.ts"

const mapKeys =
  <A>(f: (k: string) => string) => (record: Readonly<Record<string, A>>): Record<string, A> =>
    Object.fromEntries(Object.entries(record).map(([k, v]) => [f(k), v]))

const mapValues =
  <A, B>(f: (a: A) => B) => (record: Readonly<Record<string, A>>): Record<string, B> =>
    Object.fromEntries(Object.entries(record).map(([k, v]) => [k, f(v)]))

const flattenEntries =
  <A, B>(f: (entry: [string, A]) => B) => (record: Readonly<Record<string, A>>): B[] =>
    Object.entries(record).map(f)

const writeTextFileMkdir = async (path: string, data: string) => {
  await Deno.mkdir(dirname(path), { recursive: true })
  await Deno.writeTextFile(path, data)
}

// deno-fmt-ignore
const writeAll = (pwd: string) => c(p
  (mapKeys((k) => join(pwd, k)))
  (mapValues((v) => JSON.stringify(v, null, 2) + "\n"))
  (flattenEntries(([k, v]) => writeTextFileMkdir(k, v)))
)

const jsx = {
  jsx: "react-jsx",
  jsxImportSource: "https://esm.sh/preact",
}

const config = (useJsx: boolean) => ({
  fmt: { semiColons: false, lineWidth: 100 },
  compilerOptions: {
    exactOptionalPropertyTypes: true,
    ...(useJsx ? jsx : {}),
  },
})

const makeSettingsJson = () => {
  const formatter = { "editor.defaultFormatter": "denoland.vscode-deno" }
  const langs = ["json", "jsonc", "markdown", "typescript", "typescriptreact"]
  const formatters = Object.fromEntries(
    langs.map((lang) => [`[${lang}]`, formatter]),
  )
  return {
    "deno.enable": true,
    "deno.lint": true,
    "deno.unstable": true,
    "deno.config": "./deno.jsonc",
    ...formatters,
  }
}

const main = new Command()
  .name("initdeno")
  .option("--jsx", "Enable JSX support")
  .description(
    "Minimal alternative for deno init that only populates .vscode and deno.jsonc",
  )
  .action(({ jsx = false }) => {
    writeAll(Deno.cwd())({
      ".vscode/settings.json": makeSettingsJson(),
      "deno.jsonc": config(jsx),
    })
    console.log("Done.")
  })

if (import.meta.main) {
  await main.parse(Deno.args)
}