#!/usr/bin/env tsx
/**
* Smart build script that only rebuilds if source files are newer than build output.
* Compares modification times of src/ files vs assets/ files.
*/
import { execSync } from "child_process";
import fs from "fs";
import path from "path";
import { fileURLToPath } from "url";
const __dirname = path.dirname(fileURLToPath(import.meta.url));
const rootDir = path.resolve(__dirname, "..");
const srcDir = path.join(rootDir, "src");
const assetsDir = path.join(rootDir, "assets");
function getNewestMtime(dir: string, extensions: string[]): number {
if (!fs.existsSync(dir)) return 0;
let newest = 0;
function walk(currentDir: string) {
const entries = fs.readdirSync(currentDir, { withFileTypes: true });
for (const entry of entries) {
const fullPath = path.join(currentDir, entry.name);
if (entry.isDirectory()) {
// Skip node_modules and hidden directories
if (!entry.name.startsWith(".") && entry.name !== "node_modules") {
walk(fullPath);
}
} else if (entry.isFile()) {
const ext = path.extname(entry.name).toLowerCase();
if (extensions.length === 0 || extensions.includes(ext)) {
const stat = fs.statSync(fullPath);
if (stat.mtimeMs > newest) {
newest = stat.mtimeMs;
}
}
}
}
}
walk(dir);
return newest;
}
function countHtmlFiles(dir: string): number {
if (!fs.existsSync(dir)) return 0;
return fs.readdirSync(dir).filter((f) => f.endsWith(".html")).length;
}
// Check if build is needed
const srcExtensions = [".tsx", ".ts", ".css", ".js", ".jsx"];
const newestSrc = getNewestMtime(srcDir, srcExtensions);
const newestAsset = getNewestMtime(assetsDir, [".html", ".js", ".css"]);
const assetCount = countHtmlFiles(assetsDir);
const buildNeeded =
assetCount === 0 || // No build output exists
newestSrc > newestAsset; // Source is newer than build
if (buildNeeded) {
const reason =
assetCount === 0
? "No build output found"
: "Source files changed since last build";
console.log(`\x1b[33m⚡ ${reason}, rebuilding...\x1b[0m`);
execSync("pnpm run build", { stdio: "inherit", cwd: rootDir });
} else {
console.log("\x1b[32m✓ Build is up-to-date, skipping rebuild\x1b[0m");
}
