XAR (Executable Archive)

File Format
Name	XAR (Executable Archive)
Ontology	Electronic File Formats Archiving XAR (Executable Archive)
Extension(s)	.xar
Released	2018

XAR (eXecutable ARchive), or XARs, is a self-contained executable/archive file format developed by Facebook.

A XAR file can contain a program (e.g. a Python script), along with that program's dependencies, and any other required data. When executed, it mounts a Squashfs filesystem.

Identification

A XAR file apparently begins with ASCII "#!/usr/bin/env xarexec_fuse" (see shebang), or something similar.

Links

• https://github.com/facebookincubator/xar/