kas-docker: add aws-dir command parameter

The `--aws-dir` parameter for the kas-docker script allows to specify a
AWScli config directory which will then be mounted to `/etc/skel/.aws`
and copied by kas into the internal home directory using the `AWS_*`
environment variables.

Signed-off-by: Claudius Heine <ch@denx.de>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

kas-docker

@@ -44,6 +44,7 @@ usage()
 	printf "%b" "--ssh-dir\t\tDirectory containing SSH configurations.\n"
 	printf "%b" "\t\t\tAvoid \$HOME/.ssh unless you fully trust the " \
 		    "container.\n"
+	printf "%b" "--aws-dir\t\tDirectory containing AWScli configuration.\n"
 	printf "%b" "--no-proxy-from-env\tDo not inherit proxy settings from " \
 		    "environment.\n"
 	exit 1
@@ -103,6 +104,11 @@ while [ $# -gt 0 ]; do
 		SSH_DIR="$2"
 		shift 2
 		;;
+	--aws-dir)
+		[ $# -gt 2 ] || usage
+		AWS_DIR="$2"
+		shift 2
+		;;
 	--no-proxy-from-env)
 		NO_PROXY_FROM_ENV=1
 		shift 1
@@ -198,6 +204,16 @@ if [ -n "${SSH_DIR}" ] ; then
 	set -- "$@" -v "$(readlink -f "${SSH_DIR}")":/etc/skel/.ssh:ro
 fi
 
+if [ -n "${AWS_DIR}" ] ; then
+	if [ ! -d "${AWS_DIR}" ]; then
+		echo "Passed AWS_DIR '${AWS_DIR}' is not a directory"
+		exit 1
+	fi
+	set -- "$@" -v "$(readlink -f "${AWS_DIR}")":/etc/skel/.aws:ro \
+		-e AWS_CONFIG_FILE="${AWS_CONFIG_FILE:-/etc/skel/.aws/config}" \
+		-e AWS_SHARED_CREDENTIALS_FILE="${AWS_SHARED_CREDENTIALS_FILE:-/etc/skel/.aws/credentials}"
+fi
+
 if [ -t 1 ]; then
 	set -- "$@" -t -i
 fi