extract tex cmd

to make it configurable at a later point in time

lib/renderer.ts

@@ -2,7 +2,7 @@ import { mkdir, writeFile } from 'fs'
 import { spawn } from 'child_process'
 import { v1 as uuidv1 } from 'uuid'
 
-import { getDirPath, getDocPath } from './utils'
+import { getDirPath, getDocPath, getTexCmd } from './utils'
 
 function copyToTemp(id: string, texDocument: string): Promise<string> {
   return new Promise((resolve, reject) => {
@@ -26,10 +26,15 @@ function copyToTemp(id: string, texDocument: string): Promise<string> {
 }
 
 function generateDoc(id: string) {
-  return new Promise((resolve, reject) => {
+  return new Promise((resolve, reject): void => {
-    const pdflatex = spawn('pdflatex', ['-interaction', 'nonstopmode', getDocPath(id)], { cwd: getDirPath(id) })
+    const pdflatex = spawn(...getTexCmd(id))
-    pdflatex.stderr.on('data', (data) => {
+    pdflatex.stderr?.on('data', (data: string) => {
-      console.error('onData', data)
+      console.error('error: ', data)
+      reject()
+    })
+    pdflatex.on('error', (error) => {
+      console.error('error', error)
+      reject()
     })
 
     pdflatex.on('close', (code) => {

lib/utils.ts

@@ -1,3 +1,4 @@
+import { CommonSpawnOptions } from 'node:child_process'
 import path from 'path'
 
 export function getDirPath(id: string) {
@@ -11,3 +12,7 @@ export function getDocPath(id: string) {
 export function getPdfPath(id: string) {
   return path.join(getDirPath(id), 'doc.pdf')
 }
+
+export function getTexCmd(id: string): [command: string, args: ReadonlyArray<string>, options: CommonSpawnOptions] {
+  return ['pdflatex', ['-interaction', 'nonstopmode', getDocPath(id)], { cwd: getDirPath(id) }]
+}