I'm working on macos delta updates. It's going to come soon. Help required!

@electron-delta/builder

True delta updates for electronjs apps. It reduces the bandwidth usage by 90%. Users download only the delta. It uses binary diffing (HDiffPatch library) to generate the delta.

Requirements

1. The app must use electron-builder to build the app.
2. Currently only Windows os is supported. MacOS support is arriving soon.
3. Target must be nsis or nsis-web

Installation

Step 1:

npm install @electron-delta/builder -D

Step 2:

Create a file name called .electron-delta.js in the root of the project.

Step 3:

In the electron-builder config, mention the above file as afterAllArtifactBuild hook.

"build": {
    "appId": "com.electron.sample-app",
    "afterAllArtifactBuild": ".electron-delta.js",
    "win": {
      "target": ["nsis"],
      "publish": ["github"]
    },
    "nsis": {
      "oneClick": true,
      "perMachine": false,
    }
}

Step 4:

Paste the following code in the .electron-delta.js file. It will be executed after the app is built.

// .electron-delta.js
const DeltaBuilder = require("@electron-delta/builder");
const path = require("path");

const options = {
  productIconPath: path.join(__dirname, "icon.ico"),
  productName: "electron-sample-app",

  getPreviousReleases: async () => {
    return [
      {
        version: '0.0.12',
        url: 'https://github.com/electron-delta/electron-sample-app/releases/download/v0.0.12/electron-sample-app-0.0.12.exe'
      },
      {
        version: '0.0.11',
        url: 'https://github.com/electron-delta/electron-sample-app/releases/download/v0.0.11/electron-sample-app-0.0.11.exe'
      },
      {
        version: '0.0.9',
        url: 'https://github.com/electron-delta/electron-sample-app/releases/download/v0.0.9/electron-sample-app-0.0.9.exe'
      }
    ];
  },
  sign: async (filePath) => {
    // sign each delta executable
  },
};

exports.default = async function (context) {
  const deltaInstallerFiles = await DeltaBuilder.build({
    context,
    options,
  });
  return deltaInstallerFiles;
};

options

• productIconPath: (required) Path to the icon file. The icon file must be a .ico file.
• productName: (required) Name of the product.
• getPreviousReleases: (required) Function to get the previous releases. It must return an array of objects. Each object must have version and url properties.
• sign: (required) Function to sign the delta executable.
• cache: (optional) Path to the cache directory. If not specified, the default cache directory will be used. The default cache directory is ~/.electron-delta/.
• processName: (optional) Name of the process. If different from the product name.
• latestVersion: (optional) Latest version of the product. If not specified, the latest version will be fetched process.env.npm_package_version.