From 827f3c569526c4ea46db0622ccd862c15e983641 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Manuel=20R=C3=BCger?= <mrueg@gentoo.org>
Date: Mon, 20 Feb 2017 16:08:44 +0100
Subject: [PATCH] Add support for zstandard decompression

X-Gentoo-Bug: 609462
X-Gentoo-Bug-Url: https://bugs.gentoo.org/show_bug.cgi?id=609462

diff --git a/pym/portage/util/compression_probe.py b/pym/portage/util/compression_probe.py
index 74f74b163..5d4cef04b 100644
--- a/pym/portage/util/compression_probe.py
+++ b/pym/portage/util/compression_probe.py
@@ -18,6 +18,7 @@ _decompressors = {
 	"lzip": "lzip -d",
 	"lzop": "lzop -d",
 	"xz": "xz -d",
+	"zstd": "zstd -d",
 }
 
 _compression_re = re.compile(b'^(' +
@@ -26,7 +27,8 @@ _compression_re = re.compile(b'^(' +
 	b'(?P<lz4>(?:\x04\x22\x4d\x18|\x02\x21\x4c\x18))|' +
 	b'(?P<lzip>LZIP)|' +
 	b'(?P<lzop>\x89LZO\x00\x0d\x0a\x1a\x0a)|' +
-	b'(?P<xz>\xfd\x37\x7a\x58\x5a\x00))')
+	b'(?P<xz>\xfd\x37\x7a\x58\x5a\x00)|' +
+	b'(?P<zstd>(?:([\x22-\x28]\xb5\x2f\xfd)|(\x50\x2a\x4d\x18]))))')
 
 _max_compression_re_len = 9
 
@@ -41,6 +43,7 @@ def compression_probe(f):
 		lzip
 		lzop
 		xz
+		zst
 
 	@param f: a file path, or file-like object
 	@type f: str or file
-- 
2.11.0