cpt-export: properly fallback to gz

FossilOrigin-Name: 0ab060ec8b5253ee6220fe9778f552a44eb145be5adfe4dc0398b671e6bba1c4

1 files changed, 8 insertions, 4 deletions

diff --git a/contrib/cpt-export b/contrib/cpt-export
index 90bc3e0..d0ce36a 100755
--- a/contrib/cpt-export
+++ b/contrib/cpt-export
@@ -3,7 +3,7 @@
 
 case "$1" in
     --help|-h)
-        printf '\033[1;33m-> \033[m%s\n' "usage: ${0##*/} [pkg]"
+        printf 'usage: %s [pkg]\n' "${0##*/}"
         exit 0
         ;;
     '') set -- "${PWD##*/}"
@@ -15,9 +15,12 @@ cpt-list "${1:-null}" >/dev/null
 read -r ver rel 2>/dev/null < \
     "$CPT_ROOT/var/db/cpt/installed/$1/version"
 
+# Fallback to gzip if there is a typo
+case "$CPT_COMPRESS" in bz2|gz|xz|zst) ;; *) CPT_COMPRESS=gz; esac
+
 # Reset the argument list.
 pkg=$1
-tarball="$PWD/$1#$ver-$rel.tar.${CPT_COMPRESS:=gz}"
+tarball="$PWD/$1#$ver-$rel.tar.$CPT_COMPRESS"
 set --
 
 # Construct the argument list using each file.
@@ -26,12 +29,13 @@ eval set -- "$(sed '/\/$/d;s|^|".|;s|$|"|' \
 
 # Turn the list of files back into a package.
 cd "$CPT_ROOT/"
- tar cf - -- "$@" | case "$CPT_COMPRESS" in
+tar cf - -- "$@" |
+
+case "$CPT_COMPRESS" in
     bz2) bzip2 -z ;;
     gz)  gzip -6  ;;
     xz)  xz -zT 0 ;;
     zst) zstd -3  ;;
-    *)   gzip -6  ;;  # Fallback to gzip
 esac > "$tarball"
 
 printf 'tarball created in %s\n' "$tarball"