Render script using puppeteer

rendersvgs-puppeteer.js

@@ -0,0 +1,51 @@
+const puppeteer = require('puppeteer');
+const fs = require('fs');
+const fsP = fs.promises;
+
+
+const backend = process.argv[2],
+  input = process.argv[3],
+  output = process.argv[4],
+  links = process.argv[5],
+  linkout = process.argv[6];
+
+if (process.argv.length !== 5 && process.argv.length !== 7) {
+  console.log('Usage: node rendersvgs.js backend input output [links linkoutput]');
+} else {
+
+  (async () => {
+    try {
+    const browser = await puppeteer.launch({args: ['--no-sandbox'], /* headless: false, slowMo: 100, devtools: true, */ });
+    const page = await browser.newPage();
+
+    page.on('console', msg => {
+      for (let i = 0; i < msg.args().length; ++i)
+        console.log(`${i}: ${msg.args()[i]}`);
+    });
+
+    await page.goto(backend, {waitUntil: "domcontentloaded"});
+
+    const transcript = await fsP.readFile(input, { encoding: "utf-8"}),
+          imagelinks = links? fsP.readFile(links, {encoding: "utf-8"}) : undefined;
+
+    await page.waitForFunction("function() {return typeof(transcriptGeneration.createPromise) === 'function'}")
+    await page.$eval("#preload", el => el.parentNode.removeChild(el));
+    const result = await page.evaluate((t, i) => { return transcriptGeneration.createPromise(t, i); }, transcript, imagelinks);
+
+    await fsP.writeFile(output, result.svg, {encoding: "utf-8"});
+    if (linkout) {
+      await fsP.writeFile(linkout, result.overlay, {encoding: "utf-8"});
+    }
+
+    await page.pdf({path: output.replace(/.svg$/, ".pdf"),
+                    format: 'A4', 
+                    margin: '6pt'}); 
+    await page.screenshot({path: output.replace(/.svg$/, ".png"),
+                    fullPage: true}); 
+    browser.close();
+    } catch (e) {
+      console.error(e);
+    }
+
+  })();
+}