#------------------------------------------------------------------------------
# $File: gentoo,v 1.2 2022/09/12 13:13:28 christos Exp $
# gentoo:  file(1) magic for gentoo specific formats
#
# Summary: Gentoo ebuild Manifest files (GLEP 74)
# Reference: https://www.gentoo.org/glep/glep-0074.html
# Submitted by: Michal Gorny <mgorny@gentoo.org>
# Start by doing a fast check for the most common tags.
0	string	AUX
>0	use	gentoo-manifest
0	string	DATA
>0	use	gentoo-manifest
0	string	DIST
>0	use	gentoo-manifest
0	string	EBUILD
>0	use	gentoo-manifest
0	string	MANIFEST
>0	use	gentoo-manifest

# Manifest can be PGP-signed.
0	string	-----BEGIN\040PGP\040SIGNED\040MESSAGE-----
>34	search/32	\n\n
>>&0	string	AUX
>>>&0	use	gentoo-manifest
>>&0	string	DATA
>>>&0	use	gentoo-manifest
>>&0	string	DIST
>>>&0	use	gentoo-manifest
>>&0	string	EBUILD
>>>&0	use	gentoo-manifest
>>&0	string	MANIFEST
>>>&0	use	gentoo-manifest

# Use a more detailed regex to verify that we were correct.
# <tag> <filename> <size> <hash-name> <hash-value>...
# (<tag>'s already been matched prior to calling)
0	name	gentoo-manifest
>&0	regex	[[:space:]]+[[:print:]]+[[:space:]]+[[:digit:]]+[[:space:]]+[[:alnum:]]+[[:space:]]+[[:xdigit:]]{32}	Gentoo Manifest (GLEP 74)

# Summary: Gentoo ebuild and eclass files
# Reference: https://projects.gentoo.org/pms/8/pms.html
# Submitted by: Michal Gorny <mgorny@gentoo.org>
0	search/512	EAPI=
>0	regex		.*\n[\040\t]*EAPI=["']?	Gentoo ebuild
>>&0	regex		[[:alnum:]+_.-]+	\b, EAPI %s

0	search/512	@ECLASS:\040		Gentoo eclass
>&0	string		x			%s

# Summary: Gentoo supplementary package and category metadata files
# Reference: https://www.gentoo.org/glep/glep-0068.html
# Submitted by: Michal Gorny <mgorny@gentoo.org>
0	string		\<?xml
>0	search/512	\<catmetadata		Gentoo category metadata file
>0	search/512	\<pkgmetadata		Gentoo package metadata file

# Summary: Gentoo GLEP 78 binary package
# Reference: https://www.gentoo.org/glep/glep-0078.html
# Note: assumes the strict format
# Submitted by: Michal Gorny <mgorny@gentoo.org>

# GPKG uses ustar (or ustar-compatible GNU format) that starts with
# a <directory>/gpkg-1 file
257	string		ustar
>0	search/100	/gpkg-1\0
>>0	regex		[^/]+		Gentoo GLEP 78 (GPKG) binary package for "%s"
!:mime	application/x-tar
!:ext	tar
# the logic below requires the gpkg-1 file to be empty
>>>124	string	00000000000\0
# determine the compression used by looking at the second member name
>>>>512	search/100	.tar.
>>>>>&0	string		gz\0		using gzip compression
>>>>>&0	string		bz2\0		using bzip2 compression
>>>>>&0	string		lz\0		using lzip compression
>>>>>&0	string		lz4\0		using lz4 compression
>>>>>&0	string		lzo\0		using lzo compression
>>>>>&0	string		xz\0		using xz compression
>>>>>&0	string		zst\0		using zstd compression
>>>>(636.o+1024)	search/611	.sig\0	\b, signed