112 lines
3.8 KiB
JavaScript
112 lines
3.8 KiB
JavaScript
#!/usr/bin/env node
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/**
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* render_cover.js — Render cover.html → cover.pdf via Playwright.
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*
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* Usage:
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* node render_cover.js --input cover.html --out cover.pdf
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* node render_cover.js --input cover.html --out cover.pdf --wait 1200
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*
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* Exit codes: 0 success, 1 bad args, 2 dependency missing, 3 render error
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*/
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const path = require("path");
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const fs = require("fs");
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function usage() {
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console.error("Usage: node render_cover.js --input <file.html> --out <file.pdf> [--wait <ms>]");
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process.exit(1);
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}
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// ── Arg parsing ────────────────────────────────────────────────────────────────
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const args = process.argv.slice(2);
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let inputFile = null, outFile = null, waitMs = 800;
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for (let i = 0; i < args.length; i++) {
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if (args[i] === "--input" && args[i + 1]) { inputFile = args[++i]; }
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else if (args[i] === "--out" && args[i + 1]) { outFile = args[++i]; }
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else if (args[i] === "--wait" && args[i + 1]) { waitMs = parseInt(args[++i], 10); }
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}
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if (!inputFile || !outFile) usage();
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if (!fs.existsSync(inputFile)) {
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console.error(JSON.stringify({ status: "error", error: `File not found: ${inputFile}` }));
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process.exit(1);
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}
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// ── Playwright loader (tolerates global npm installs) ─────────────────────────
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function loadPlaywright() {
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const { execSync } = require("child_process");
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try { return require("playwright"); } catch (_) {}
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try {
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const root = execSync("npm root -g", { stdio: ["ignore","pipe","ignore"] }).toString().trim();
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return require(path.join(root, "playwright"));
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} catch (_) {}
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console.error(JSON.stringify({
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status: "error",
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error: "playwright not found",
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hint: "Run: npm install -g playwright && npx playwright install chromium"
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}));
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process.exit(2);
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}
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// ── Main ───────────────────────────────────────────────────────────────────────
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(async () => {
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const { chromium } = loadPlaywright();
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let browser;
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try {
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browser = await chromium.launch();
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} catch (e) {
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// Chromium binary missing — try installing
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const { spawnSync } = require("child_process");
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const r = spawnSync("npx", ["playwright", "install", "chromium"], { stdio: "inherit", shell: true });
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if (r.status !== 0) {
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console.error(JSON.stringify({
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status: "error",
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error: "Chromium not installed and auto-install failed",
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hint: "Run: npx playwright install chromium"
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}));
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process.exit(2);
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}
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browser = await chromium.launch();
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}
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try {
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const page = await browser.newPage();
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const fileUrl = "file://" + path.resolve(inputFile);
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await page.goto(fileUrl);
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await page.waitForTimeout(waitMs); // let CSS + any JS settle
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await page.pdf({
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path: outFile,
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width: "794px",
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height: "1123px",
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printBackground: true,
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});
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await browser.close();
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// Basic sanity: output file must exist and be > 5 KB
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const stat = fs.statSync(outFile);
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if (stat.size < 5000) {
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console.error(JSON.stringify({
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status: "error",
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error: "Output PDF is suspiciously small — cover may be blank",
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hint: "Check cover.html for render errors"
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}));
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process.exit(3);
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}
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console.log(JSON.stringify({
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status: "ok",
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out: outFile,
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size_kb: Math.round(stat.size / 1024),
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}));
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} catch (e) {
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if (browser) await browser.close().catch(() => {});
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console.error(JSON.stringify({ status: "error", error: String(e) }));
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process.exit(3);
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}
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})();
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