doc: improve README.ts

Author: DenisGorbachev

Cargo.lock

@@ -1,36 +1,31 @@
-#!/usr/bin/env -S deno run --allow-read --allow-run=git,cargo --allow-env=DENOEXEC_STRING_LITERAL_DEBUG
+#!/usr/bin/env -S deno run --allow-read --allow-run=bash,git,cargo --allow-env --allow-sys
 
-import * as toml from "jsr:@std/toml"
-import { $, _ } from "https://deno.land/x/[email protected]/mod.ts";
+import * as zx from 'npm:zx'
 
 interface CargoToml {
   package: {
-    name: string
+    name: string,
+    description: string
   }
 }
 
-const dirname = import.meta.dirname
-const decoder = new TextDecoder();
-const theCargoTomlText = await Deno.readTextFile(`${dirname}/Cargo.toml`)
-const theCargoToml = toml.parse(theCargoTomlText) as unknown as CargoToml
-const packageName = theCargoToml.package.name
-const bin = packageName
-const help = await new Deno.Command("cargo", {
-  args: ['run', '--bin', bin, '--', '--help']
-}).output();
-if (!help.success) throw help
-const repo = await getGitHubRepo()
-
-async function getGitHubRepo() {
-  const url = (await $(_`git remote get-url origin`)).trim();
-  const match = url.match(/github\.com[:\/]([^.]+)/);
-  if (match) {
-    return match[1]
-  } else {
-    throw new Error(`Could not extract org/repo from ${url}`)
-  }
+interface Repo {
+  url: string
 }
 
+const $ = zx.$({
+  cwd: import.meta.dirname
+})
+
+const parse = (input: { toString: () => string }) => JSON.parse(input.toString())
+
+const theCargoToml: CargoToml = parse(await $`yj -t < Cargo.toml`)
+const name = theCargoToml.package.name
+const bin = name
+const description = theCargoToml.package.description
+const help = await $`cargo run --quiet --bin ${bin} -- --help`
+const repo: Repo = parse(await $`gh repo view --json url`)
+
 const autogenerated = `
 <!-- DO NOT EDIT -->
 <!-- This file is automatically generated by README.ts. -->
@@ -42,12 +37,12 @@ ${autogenerated}
 
 # Create Rust GitHub repo
 
-[![Build](https://github.com/${repo}/actions/workflows/ci.yml/badge.svg)](https://github.com/${repo})
-[![Documentation](https://docs.rs/${packageName}/badge.svg)](https://docs.rs/${packageName})
+[![Build](${repo.url}/actions/workflows/ci.yml/badge.svg)](${repo.url})
+[![Documentation](https://docs.rs/${name}/badge.svg)](https://docs.rs/${name})
 
 ## Overview
 
-\`${bin}\` is a CLI program that creates a new repository on GitHub, clones it locally, initializes a Rust project, copies the configs from a pre-existing directory.
+${description}
 
 ## Examples
 
@@ -77,13 +72,13 @@ ${bin} --name my-new-project --cargo-init-args '--lib'
 ## Installation
 
 \`\`\`shell
-cargo install ${packageName}
+cargo install ${name}
 \`\`\`
 
 ## Usage
 
 \`\`\`
-${decoder.decode(help.stdout).trim()}
+${help.stdout.trim()}
 \`\`\`
 
 ## License