[PATCH] fix gzip compress then it not supports rsyncable option

[Vasiliy Tolstov <v.tolstov@xxxxxxxxx>]

dracut fail to create initramfs when compressor gzip and
it not have rsyncable option

Signed-off-by: Vasiliy Tolstov <v.tolstov@xxxxxxxxx>
---
 dracut.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dracut.sh b/dracut.sh
index 1c7e208..7aa1264 100755
--- a/dracut.sh
+++ b/dracut.sh
@@ -822,7 +822,7 @@ case $compress in
     bzip2) compress="bzip2 -9";;
     lzma)  compress="lzma -9 -T0";;
     xz)    compress="xz --check=crc32 --lzma2=dict=1MiB -T0";;
-    gzip)  compress="gzip -n -9 --rsyncable"; command -v pigz > /dev/null 2>&1 && compress="pigz -9 -n -T -R";;
+    gzip)  compress="gzip -n -9"; command -v gzip --help 2>&1 | grep -q rsyncable && compress="gzip -n -9 --rsyncable"; command -v pigz > /dev/null 2>&1 && compress="pigz -9 -n -T -R";;
     lzo)   compress="lzop -9";;
     lz4)   compress="lz4 -l -9";;
 esac
-- 
2.1.2

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