make pdfs

renderer.js

@@ -0,0 +1,49 @@
+const fs = require('fs');
+const path = require('path');
+const spawn = require('child_process').spawn;
+
+function copyToTemp(texDocument, callback) {
+    fs.mkdtemp('/tmp/pdfer-', (err, tmpPath) => {
+        if (err) {
+            callback(err);
+            return;
+        }
+
+        const docPath = path.join(tmpPath, 'doc.tex');
+        fs.writeFile(docPath, texDocument, (err) => {
+            if (err) {
+                callback(err);
+            }
+            callback(null, docPath);
+        });
+    });
+}
+
+function generateDoc(docPath, callback) {
+    const pdflatex = spawn('pdflatex', [docPath, '-halt-on-error'], {cwd: path.dirname(docPath)});
+    pdflatex.stderr.on('data', (data) => {
+        console.error('onData', data);
+    });
+
+    pdflatex.on('close', (code) => {
+        if (code > 0) {
+            callback(`pdflatex returned with code ${code}`);
+            return;
+        }
+        console.log('PDF generated');
+        const pdfFilePath = docPath.replace('.tex', '.pdf');
+        fs.readFile(pdfFilePath, (err, data) => {
+            if (err) {
+                callback(err);
+                return;
+            }
+            callback(null, data);
+        });
+    });
+}
+
+module.exports = (texDocument, callback) => {
+    copyToTemp(texDocument, (err, docPath) => {
+        generateDoc(docPath, callback);
+    });
+};