test.ts

import { TextLineStream } from "@std/streams/mod.ts"
// @deno-types="@esbuild/mod.d.ts"
import { build, stop } from "@esbuild/mod.js"
import { denoPlugins } from "@esbuild_deno_loader/mod.ts"

async function esbuild(inPath: string, outPath: string) {
	const { errors, warnings } = await build({
		plugins: denoPlugins(),
		entryPoints: [ inPath ],
		outfile: outPath,
		format: 'esm',
		bundle: true,
		keepNames: true,
		jsxFactory: 'x',
		jsxFragment: 'y'
	})
	errors.forEach(error => console.error(error))
	warnings.forEach(warning => console.warn(warning))
}

async function createScript(path: string) {
	const lines: string[] = []
	{
		let copyLine = false
		for await (const line of (await Deno.open(path)).readable.pipeThrough(new TextDecoderStream()).pipeThrough(new TextLineStream())) {
			if (!copyLine)
				if (line.trim() === '// ==UserScript==')
					copyLine = true
				else
					continue
			lines.push(line.trim())
			if (line.trim() === '// ==/UserScript==')
				break
		}
	}
	if (!lines.length)
		return
	lines.push('\'use strict\';\n')

	const name = path.slice(path.lastIndexOf('/') + 1, path.lastIndexOf('.'))
	const file = await Deno.create(`./tests/${name}.user.js`)
	await file.write(Uint8Array.from(lines.join('\n').split('').map(char => char.charCodeAt(0))))
	await esbuild(path, `./tests/${name}.min.js`)
	await file.write(await Deno.readFile(`./tests/${name}.min.js`))
	file.close()
	await Deno.remove(`./tests/${name}.min.js`)
}

/* Create ./tests/
-------------------------*/
try {
	await Deno.remove('./tests/', { recursive: true })
}
// deno-lint-ignore no-empty
catch { }
finally {
	await Deno.mkdir('./tests/', { recursive: true })
}

await Promise.allSettled(Deno.args.map(arg => createScript(arg)))
stop()

console.log(`${performance.now().toLocaleString('en-US', { maximumFractionDigits: 2 })}ms`)