magic-db 0.4.3

This crate provides a precompiled magic database for file type identification. It allows any program to perform magic file detection without the burden of compiling rules from source.
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#------------------------------------------------------------------------------
# $File: rust,v 1.2 2022/11/18 15:58:15 christos Exp $
# Magic for Rust and related languages programs
#

# Rust compiler metadata
# From: Alexandre Iooss <erdnaxe@crans.org>
# URL: https://github.com/rust-lang/rust/blob/1.64.0/compiler/rustc_metadata/src/rmeta/mod.rs
0	string		rust\x00\x00\x00
>12	string		\014rustc\x20		Rust compiler metadata
!:ext	rmeta
!:mime  application/x-rust-metadata
>>7	byte		x			\b, version %d

# Rust compiler metadata updated with new layout
# From: Quentin Jérôme <quentin.jerome@circl.lu>
# Reference: https://github.com/rust-lang/rust/blob/master/compiler/rustc_metadata/src/rmeta/mod.rs
0	    string		rust\x00\x00\x00
>0x11   string	    rustc		Rust compiler metadata
# version number 
>>0x7   byte        x           , version %d
!:ext	rmeta
!:mime  application/x-rust-metadata
>>0x10	pstring	    x			\b, %s

# Rust incremental compilation metadata
# From: Alexandre Iooss <erdnaxe@crans.org>
# URL: https://github.com/rust-lang/rust/blob/1.64.0/compiler/rustc_incremental/src/persist/file_format.rs
0	string		RSIC
>4	uleshort	=0			Rust incremental compilation metadata
!:ext	bin
>>6	pstring		x			\b, rustc %s

# Rust source text identification
# From: Quentin Jérôme <quentin.jerome@circl.lu>
# we try to search for crate level attribute
0	string		#![
>&0 regex/1l  \\w+\\s?.*?\\]$
>>0 use rust-src

# we search for rust keywords in the first 4096 bytes
# don't put the question mark on macro_rules otherwise we don't match \b
0   regex/4096s \\b(impl|fn|macro_rules)\\b
# sometimes impl lines are quite long, searching on 3 lines increases
# the number of bytes read in the tested value to 240 bytes
>&0 regex/3l impl(<.*?>)?(\\s+[a-zA-Z0-9_:]+\\s+for)?\\s+[a-zA-Z0-9_]+.*?
>>0 use rust-src
>&0 regex/1l fn\\s+[a-zA-Z0-9_]+(<.*?>)?\\(
>>0 use rust-src
>&0 string macro_rules!
>>0 use rust-src

0 name rust-src Rust source code text
!:ext  rs
!:mime text/x-rust