electron-builder not working for production due to path - reactjs

Question

everyone
I created a React app in order to build an electron app. I'm trying to use electron-builder to create the installers. I'm working on Ubuntu trying to generate a .deb.
I didn't use create-react-app, I used a boilerplate I already had, but I don't know if this is the problem.
I can make it work as long as I edit the index.html the webpack generates in the build folder. I have to change the path to main.css and build.js from /main.css and /build.js to ./main.css and ./build.js.
I read that I have to use the "homepage" property in package.json, but it's not working, seems to be ignored.
My folder structure is like:
package.json
src/
config/
main_electron_file.js
build/ #generated by webpack when I run the 'build:prd' command
public/ #empty
package.json
{
"name": "frontend",
"version": "1.0.0",
"description": "",
"main": "./main_electron_file.js",
"scripts": {
"dev": "./node_modules/.bin/webpack-dev-server --config ./config/webpack.config.dev.js --mode development --open --hot",
"build:prd": "./node_modules/webpack/bin/webpack.js --mode production --config ./config/webpack.config.prd.js --env.NODE_ENV=production --progress",
"electron": "electron .",
"start": "npm run dev && npm run electron",
"start:dev": "ELECTRON_START_URL=http://localhost:3000 electron .",
"dist": "build"
},
"keywords": [],
"author": {
"name": "name",
"email": "email#mail.com"
},
"license": "ISC",
"dependencies": {
...
},
"devDependencies": {
...
},
"homepage": "./",
"build": {
"appId": "com.myself.myapp",
"linux": {
"target": [
"deb"
]
}
}
}
main_electron_file.js
// Modules to control application life and create native browser window
const { app, BrowserWindow } = require('electron');
const path = require('path');
const url = require('url');
// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow
function createWindow() {
const startUrl = process.env.ELECTRON_START_URL || url.format({
pathname: path.join(__dirname, 'build/index.html'),
protocol: 'file:',
slashes: true
});
// Create the browser window.
mainWindow = new BrowserWindow({ width: 800, height: 600, resizeble: false });
mainWindow.setResizable(false);
// and load the index.html of the app.
// win.loadURL('http://localhost:3000');
mainWindow.loadURL(startUrl);
// Open the DevTools.
mainWindow.webContents.openDevTools()
// Emitted when the window is closed.
mainWindow.on('closed', function () {
// Dereference the window object, usually you would store windows
// in an array if your app supports multi windows, this is the time
// when you should delete the corresponding element.
mainWindow = null
})
}
// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', createWindow)
// Quit when all windows are closed.
app.on('window-all-closed', function () {
// On OS X it is common for applications and their menu bar
// to stay active until the user quits explicitly with Cmd + Q
if (process.platform !== 'darwin') {
app.quit()
}
})
app.on('activate', function () {
// On OS X it's common to re-create a window in the app when the
// dock icon is clicked and there are no other windows open.
if (mainWindow === null) {
createWindow()
}
})
// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.
By the way. I'm not building it. I'm running it pointing to the index.html in the dist, as I would do in production mode. So i'm running npm run build:prd and then npm run electron
ANy ideas how I could make this process automatic?

Answer 1

Please try adding this line in your index.html
<base href="./">
And your main.css and build.js directory should be set relative to your index.html in build folder

Answer 2

What worked for me was:
Add to webpack config:
output: {
publicPath: './',
...
}
This tells webpack to have every link between files it creates based at the same directory.
As suggested by carlokid, add to index.html:
< base href="./" />