esbuild.cjs
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esbuild.cjs
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	const { build } = require("esbuild");
	const glob = require("tiny-glob");
	const { promises: fs } = require("node:fs");
	const { extname, resolve, relative } = require("node:path");

	const watch = process.argv.at(-1) === "--watch";

	// plugin that rewrites the import paths so in typescript we can use
	//
	// import smth from src/index.ts
	//
	// instead of providing relative paths
	const handle_absolute_paths = (project_dir) => ({
	name: "sealgen-rewrite-asset-imports",
	setup(build) {
	build.onLoad({ filter: /\.tsx?$/ }, async (args) => {
	let contents = await fs.readFile(args.path, "utf8");
	const regex_import = new RegExp(
	`^import ([^ ]+, )?(\\w+\|{[^}]+}) from "([^"]+)";`,
	"gm"
	);
	contents = contents.replaceAll(regex_import, (line) => {
	const replaced = line.replace(
	`"src/`,
	`"` +
	relative(args.path, resolve(project_dir, "./lib/src")) +
	"/"
	);
	return replaced;
	});
	return {
	contents,
	loader: extname(args.path) === ".tsx" ? "tsx" : "ts",
	};
	});
	},
	});

	(async () => {
	let entryPoints = Object.fromEntries(
	(await glob("./src/*/.ts")).map((e) => [e.replace(/\.ts$/, ""), e])
	);
	build({
	entryPoints,
	sourcemap: true,
	outdir: "./lib",
	logLevel: "info",
	platform: "node",
	watch,
	target: "node16",
	format: "esm",
	plugins: [handle_absolute_paths(__dirname)],
	});
	})();