changing aws command line detection to make it silent (#127)

Author: kadigergo

authorized_keys_command.sh

@@ -5,7 +5,7 @@ if [ -z "$1" ]; then
 fi
 
 # check if AWS CLI exists
-if ! which aws; then
+if ! [ -x "$(which aws)" ]; then
     echo "aws executable not found - exiting!"
     exit 1
 fi

import_users.sh

@@ -5,7 +5,7 @@ function log() {
 }
 
 # check if AWS CLI exists
-if ! which aws; then
+if ! [ -x "$(which aws)" ]; then
     log "aws executable not found - exiting!"
     exit 1
 fi

install.sh

@@ -88,7 +88,7 @@ export USERADD_PROGRAM
 export USERADD_ARGS
 
 # check if AWS CLI exists
-if ! which aws; then
+if ! [ -x "$(which aws)" ]; then
     echo "aws executable not found - exiting!"
     exit 1
 fi