appimagetool vs Electron Forge

appimagetool is a free Linux command-line utility that creates an AppImage from an existing AppDir. It is intended for application authors packaging desktop Linux software for distribution across common Linux distributions. The project describes it as a low-level component and recommends community higher-level tools for most users. Command-line options cover listing AppImage files, setting or guessing update information, selecting Squashfs compression, and excluding files. GPG signing is supported with a signing key and additional arguments. When update information is embedded and zsyncmake is installed, the tool can create a zsync file. Build instructions list x86_64, i686, aarch64, and armhf targets. The current version downloads the latest AppImage runtime, or accepts a local runtime file. Update information can be guessed from GitHub Actions and GitLab CI environment variables. An AppDir is required, and ARCH must be set when binary architecture cannot be determined, such as with multiple architectures or shell scripts. Source code is under the MIT License, subject to stated exceptions and dependency terms.

Electron Forge is a free, open-source tool for packaging and distributing Electron applications on Windows, macOS, and Linux. Its build pipeline brings together code signing, installer creation, and artifact publishing. Makers generate platform-specific distributables, including Squirrel.Windows, ZIP, DEB, RPM, DMG, AppX, and Flatpak formats. Publishers can send outputs from the make command to distribution services, update servers, or storage such as an S3 bucket. Developers can initialize projects with create-electron-app and choose first-party Webpack, Webpack with TypeScript, Vite, or Vite with TypeScript templates. The Plugin API supports custom build logic, and custom Makers and Publishers can address additional build or storage targets. The GitHub Publisher supports GitHub Releases and, with host configuration, GitHub Enterprise. Documented auto-update options include a free Electron team service for open-source GitHub apps, static storage publishers, and a hosted update server; macOS auto-updates require a signed app. Getting started requires Node.js 16.4.0 or later, Git, and a JavaScript package manager. Packaging requires node_modules on disk and does not account for symlinked dependencies or Yarn Plug'n'Play.