asar

Library for working with Electron's ASAR archive files.

Installation

pip install asar

Usage

• pack and extract asar.

  from pathlib import Path
  from asar import create_archive, extract_archive
  
  create_archive(Path("src"), Path("app.asar"))
  extract_archive(Path("app.asar"), Path("dst"))

• with unpack expression

  create_archive(Path("src"), Path("app.asar"), unpack="*.exe")

  then we got:

  .
  ├── app.asar
  └── app.asar.unpacked
      └── f2.exe
  

• list files of asar

  from pathlib import Path
  from asar import AsarArchive
  
  with AsarArchive(Path("app.asar"), mode="r") as archive:
      print(archive.list())

  then we got:

  [Path('assets'), Path('assets/icon.png'), ...]
  

• read one file from asar by random access

  from pathlib import Path
  from asar import AsarArchive
  
  with AsarArchive(Path("app.asar"), mode="r") as archive:
      print(archive.read(Path("f1.txt"), follow_link=True))

  then we got:

  b'Hello, Asar'
  

• create an asar from another asar, without extracting to filesystem.

  import io 
  from pathlib import Path
  from asar import AsarArchive
  
  with AsarArchive(Path("app.asar"), mode="r") as reader, AsarArchive(Path("app.new.asar"), "w") as writer:
      writer.pack_other_asar(reader)
      writer.pack_file(path_in=Path("assets/added1.txt"), file_path=Path("added.txt"))
      writer.pack_stream(path_in=Path("assets/added2.txt"), file_reader=io.BytesIO(b"some text"))

  then we got app.new.asar, extract it:

  app_new_asar_extract
          ├── assets
          │     ├── added1.txt
          │     ├── added2.txt
          │     └── ... other files from app.asar 
          └── ... other files from app.asar