compile and pack electron main thread js files in order to reduce the size of app.asar

[bthulu]

Is your feature request related to a problem? Please describe.
i add nothing to dependencies in package.json except render dependencies such as follows:

  "dependencies": {
    "@quasar/extras": "^1.0.0",
    "axios": "^0.21.1",
    "core-js": "^3.6.5",
    "quasar": "^2.0.0",
    "vue-i18n": "^9.0.0",
    "vuex": "^4.0.1"
  }

after execute quasar build -m electron, all my files in src folder and render dependencies is compiled and repackaged to dist/electron/UnPackaged/js folder. so, just need to add all files in dist/electron/UnPackaged/js/ to app.asar, no other dependencies needed.

however, all dependencies in node_modules except dev dependencies is added to app.asar, makes app.asar grows to 15MB+.

then i add the following into quasar.conf.js, reduced app.asar to only 1MB+, and everything works.

electron {
  bundler: 'builder',
  builder: {
    files: [
      '**/*',
      '!**/node_modules/**/*',
    ],
  }
}

so no need to add any render dependencies in node_modules to app.asar, since all render dependencies has been tree-shaking and repacked to dist/electron/UnPackaged/js/, just add files in this folder to app.asar is ok.

in the real world, we will add some dependencies to the main process. eg, add electron-updater and use it in electron-main.js.

but if i build electron use the config above, then install and run, it will crash and tell you can not find electron-updater. it seems only copied files in src-electron , no repackage and tree-shaking on them with their dependencies.

finally, i find all atomic dependencies electron-updater needs, and add them to files tag in quasar.conf.js as below, rebuild electron, the app.asar grows to 2MB+, and everything works.

        files: [
          '**/*',
          '!**/node_modules/**/*',
          // all electron-updater and its dependencies
          '**/node_modules/electron-updater/**/*',
          '**/node_modules/builder-util-runtime/**/*',
          '**/node_modules/fs-extra/**/*',
          '**/node_modules/@types/semver/**/*',
          '**/node_modules/js-yaml/**/*',
          '**/node_modules/lazy-val/**/*',
          '**/node_modules/lodash.escaperegexp/**/*',
          '**/node_modules/lodash.isequal/**/*',
          '**/node_modules/semver/**/*',
          '**/node_modules/debug/**/*',
          '**/node_modules/sax/**/*',
          '**/node_modules/jsonfile/**/*',
          '**/node_modules/universalify/**/*',
          '**/node_modules/argparse/**/*',
          '**/node_modules/lru-cache/**/*',
          '**/node_modules/yallist/**/*',
          '**/node_modules/ms/**/*',
          '**/node_modules/universalify/**/*',
          '**/node_modules/graceful-fs/**/*',
        ],

then if i need more dependencies for the main process, and i don't want to include all render dependencies duplicate to make xxx.exe too big, how could i do ? find all final atomic dependencies, and add them to files?

i also tried electron-packager, the problem is the same as electron-builder.

Describe the solution you'd like
repackage and tree-shaking main process js files with only their dependencies while run quasar build -m electron

Describe alternatives you've considered
add a quasar add electronMainDependencies xxx command, when execute it, add the dependencies to a electronMainDependencies tag in package.json and deliver its value to quasar.conf.js, so i can include them in files and exclude all other files in node_modules.

Additional context