Electron: electron-builder config

Question

Can somebody explain to me how electron-builder config work? I can't understand 95% of the things. Everything bellow API is somehow confusing. There are 0 examples of actually how something should be added to the build object. I mean, look at a simple dev request: I want to create windows and linux build. I copy/paste-ed some code and I came out with the fillowing:

{
  "name": "Test",
  "version": "1.0.0",
  "author": "Test Ltd.",
  "description": "Test",
  "devDependencies": {
      ...
  },
  "build": {
    "appId": "Test",
    "extraFiles": {
      "from": "./build",
      "to": "./dist"
    },
    "win": {
      "icon" : "build/images/icon.ico",
      "target": ["portable"]
    },
    "linux": {
      "icon" : "build/images/icon.png",
      "target": ["pacman"]
    }
  },
  "scripts": {
    "pack": "build --dir",
    "dist": "build"
  }
}

1. It creates only x64 windows package. In the dist folder there is a folder called win-unpacked and one .exe file. The linux package is not there. Why?
2. How to specify the arch (x64, x32)?
3. How to use the things bellow API? I understood only how WinBuildOptions work - I should write "win" in the "build" object of package.json.
4. What is Squirrel Events? I red this, but can't understand it from plain text.
5. Any recommendations for a video guide for "How to create an installer for Windows with Electron/electron-builder?" or "How to create package for Linux and upload it online so people with Linux can download it with Electron/electron-builder?" I couldn't find any.

Answer 1

Take a look a the api options in the github repo for electron-builder, which uses the windows build options and linux build options to work. The descriptions of each item are laid out next to the attribute/property of the config.

This is a contrived example, but should at least give the structure of how it should look for windows and linux:

    "build":{
        "appid":"yourid",
        "asar": true
        "linux":{
            "category": "...",
            "target": "..."
        },
        "win":{
            "target": "...",
            "certificateFile":"...",
            "publisherName": "..."
        }

    }

There is a multi platform build page you can review. Specifically, to target a certain arch, you use the command line flags. From the documentation:

By default build for current platform and current arch. Use CLI flags --mac, --win, --linux to specify platforms. And --ia32, --x64 to specify arch.

Typically, this is specified as an npm script, and passed along that way when you run the electon-build command. In terms of building on platforms and potentially missing information, please see this quote:

Don't expect that you can build app for all platforms on one platform.

There appears to be extra setup and configuration needed to develop a linux and windows version based on the specific OS you are using. I would look at what that page states in terms of dependencies.