add zstd (#36)

loomchild · Mar 14, 2021 · 0cec0d7 · 0cec0d7
1 parent f8b07e8
commit 0cec0d7
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diff --git a/Dockerfile b/Dockerfile
@@ -1,6 +1,6 @@
 FROM alpine
 
-RUN apk update && apk add --no-cache dumb-init xz tar
+RUN apk update && apk add --no-cache dumb-init xz tar zstd
 
 COPY volume-backup.sh /
 

diff --git a/volume-backup.sh b/volume-backup.sh
@@ -93,6 +93,10 @@ gz)
       TAROPTS="$TAROPTS -z"
       EXTENSION=.tar.gz
       ;;
+zstd)
+      TAROPTS="$TAROPTS -I zstd"
+      EXTENSION=.tar.zstd
+      ;;
 none|0)
       EXTENSION=.tar
       ;;