From ecf2a852b5e0fa54131c878597c9b24cffb8a663 Mon Sep 17 00:00:00 2001
From: danielewood <daniel@woods.us>
Date: Thu, 12 Apr 2018 17:43:08 -0700
Subject: [PATCH] Added support for ZStandard compression.

Available in all major distros with a simple yum/apt-get/pkg.

References:
ZSTD Compression by Allan Jude - https://www.youtube.com/watch?v=hWnWEitDPlM
Zstandard - https://facebook.github.io/zstd/
---
 syncoid | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/syncoid b/syncoid
index 7337f5b..baf5053 100755
--- a/syncoid
+++ b/syncoid
@@ -368,6 +368,18 @@ sub compressargset {
 			decomrawcmd => '/usr/bin/pigz',
 			decomargs   => '-dc',
 		},
+		'zstd-fast' => {
+			rawcmd      => '/usr/bin/zstd',
+			args        => '-3',
+			decomrawcmd => '/usr/bin/zstd',
+			decomargs   => '-dc',
+		},
+		'zstd-slow' => {
+			rawcmd      => '/usr/bin/zstd',
+			args        => '-19',
+			decomrawcmd => '/usr/bin/zstd',
+			decomargs   => '-dc',
+		},
 		'lzo' => {
 			rawcmd      => '/usr/bin/lzop',
 			args        => '',
@@ -378,7 +390,7 @@ sub compressargset {
 
 	if ($value eq 'default') {
 		$value = $DEFAULT_COMPRESSION;
-	} elsif (!(grep $value eq $_, ('gzip', 'pigz-fast', 'pigz-slow', 'lzo', 'default', 'none'))) {
+	} elsif (!(grep $value eq $_, ('gzip', 'pigz-fast', 'pigz-slow', 'zstd-fast', 'zstd-slow', 'lzo', 'default', 'none'))) {
 		warn "Unrecognised compression value $value, defaulting to $DEFAULT_COMPRESSION";
 		$value = $DEFAULT_COMPRESSION;
 	}