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HACKING

php update.php

This downloads the relevant releases from GitHub, and generates hashes of all files contained within each release.

This includes all releases that were not:

  1. nightly releases
  2. beta releases
  3. older than 0.24.0 (electron was called atom-shell before that)

All generated hashes are kept in hashes/$version.json. A sample snippet for the JSON structure:

{
    "LICENSE": "10bfa95a2f25df14dfe6a55a9e73d9fa5becdb60",
    "LICENSES.chromium.html": "fa5b9f95d12b0044d6ae8dbf303ad46d43edea76",
    "version": "0e2ef13d37fb9a81b63ab1babfa39635722366a3",
    "Electron.app/Contents/PkgInfo": "9f9eea0cfe2d65f2c3d6b092e375b40782d08f31",
}

Post generation of hashes, a lookup table is generated from all the hashes. Using this lookup table, you can query a hash and get a list of releases that specific hash was found in.

These are stored in the following architecture specific files:

  • lookup/darwin-arm64.json
  • lookup/darwin-x64.json
  • lookup/linux-arm64.json
  • lookup/linux-x64.json
  • lookup/win32-arm64.json
  • lookup/win32-x64.json

The schema for these files is fairly intuitive:

{
  "sha1_hash": ["list", "of", "versions"],
  "sha1_hash": ["list", "of", "versions"]
}

GitHub Actions

  1. Tests are run on all supported Node versions
  2. Hashes are automatically updated daily, and a new release is triggered in case of new electron releases.