cidata: avoid bash when avoidable

Signed-off-by: Akihiro Suda <[email protected]>

Author: AkihiroSuda

pkg/cidata/cidata.TEMPLATE.d/boot/05-persistent-data-volume.sh

@@ -1,4 +1,6 @@
 #!/bin/bash
+# bash is used for enabling `set -o pipefail`.
+# NOTE: On Alpine, /bin/bash is ash with ASH_BASH_COMPAT, not GNU bash
 set -eux -o pipefail
 
 # Restrict the rest of this script to Alpine until it has been tested with other distros

pkg/cidata/cidata.TEMPLATE.d/boot/10-alpine-prep.sh

@@ -1,5 +1,5 @@
-#!/bin/bash
-set -eux -o pipefail
+#!/bin/sh
+set -eux
 
 # This script prepares Alpine for lima; there is nothing in here for other distros
 test -f /etc/alpine-release || exit 0

pkg/cidata/cidata.TEMPLATE.d/boot/20-rootless-base.sh

@@ -1,5 +1,5 @@
-#!/bin/bash
-set -eux -o pipefail
+#!/bin/sh
+set -eux
 
 # This script does not work unless systemd is available
 command -v systemctl 2>&1 >/dev/null || exit 0

pkg/cidata/cidata.TEMPLATE.d/boot/30-install-packages.sh

@@ -1,9 +1,10 @@
-#!/bin/bash
-set -eux -o pipefail
+#!/bin/sh
+set -eux
 
 # Install minimum dependencies
 if command -v apt-get 2>&1 >/dev/null; then
-  export DEBIAN_FRONTEND=noninteractive
+  DEBIAN_FRONTEND=noninteractive
+  export DEBIAN_FRONTEND
   apt-get update
   if [ "${LIMA_CIDATA_MOUNTS}" -gt 0 ]; then
     apt-get install -y sshfs

pkg/cidata/cidata.TEMPLATE.d/boot/40-install-containerd.sh

@@ -1,5 +1,5 @@
-#!/bin/bash
-set -eux -o pipefail
+#!/bin/sh
+set -eux
 
 
 if [ "${LIMA_CIDATA_CONTAINERD_SYSTEM}" != 1 ] && [ "${LIMA_CIDATA_CONTAINERD_USER}" != 1 ]; then