Make system_is_inside_container a proper bash function

conf/systemd.service

@@ -5,7 +5,7 @@ Wants=network-online.target
 
 [Service]
 User=__APP__
-Environment='RUST_LOG=garage=info' 'VIRTUALISATION=__SYSTEM_IS_INSIDE_CONTAINER__'   'RUST_BACKTRACE=1'
+Environment='RUST_LOG=garage=info' 'VIRTUALISATION=__SYSTEM_IS_INSIDE_CONTAINER_BOOL__'   'RUST_BACKTRACE=1'
 ExecStartPre=+__INSTALL_DIR__/mount_disk.sh 
 ExecStart=__INSTALL_DIR__/garage -c __INSTALL_DIR__/garage.toml server
 ExecStopPost=+__INSTALL_DIR__/umount_disk.sh 

scripts/_common.sh

@@ -6,13 +6,17 @@
 
 GARAGE_VERSION="0.9.0"
 
-if systemd-detect-virt  -c -q
+system_is_inside_container() {
+    systemd-detect-virt  -c -q
+}
+
+if system_is_inside_container
 then
-    system_is_inside_container="true"
     # used to comment systemd isolation to allow mount disk
+    system_is_inside_container_bool="true"
     comment_if_system_is_inside_container="#"
 else
-    system_is_inside_container="false"
+    system_is_inside_container_bool="false"
     comment_if_system_is_inside_container=""
 fi
 

scripts/config

@@ -7,7 +7,7 @@ source /usr/share/yunohost/helpers
 # RETRIEVE ARGUMENTS
 #=================================================
 
-if [[ "$system_is_inside_container" == "true" ]]
+if system_is_inside_container
 then
     nbd_index=$(cat $data_dir/nbd_index)
 fi
@@ -15,7 +15,7 @@ fi
 command="$install_dir/garage -c $install_dir/garage.toml"
 
 set__weight() {
-    if [[ "$system_is_inside_container" == "true" ]]
+    if system_is_inside_container
     then
         systemctl stop $app
         old_weight="$(ynh_app_setting_get --app=$app --key=weight)"

scripts/install

@@ -79,7 +79,7 @@ chown $app:$app "$install_dir/garage.toml"
 #=================================================
 ynh_script_progression --message="Creating a data directory..." --weight=5
 
-if [[ "$system_is_inside_container" == "true" ]]
+if system_is_inside_container
 then
     ynh_print_warn --message="This may take time regarding disk size..."
 	

scripts/remove

@@ -40,7 +40,7 @@ ynh_remove_systemd_config
 # Remove the app-specific logrotate config
 ynh_remove_logrotate
 
-if [[ "$system_is_inside_container" == "true" ]]
+if system_is_inside_container
 then
 	ynh_script_progression --message="Umount virtual disk..."
 

scripts/restore

@@ -24,7 +24,7 @@ chown -R $app:$app "$install_dir"
 #=================================================
 ynh_script_progression --message="Restoring the data directory..."
 
-if [[ "$system_is_inside_container" == "true" ]]
+if system_is_inside_container
 then
 	# to be sure to not exceed size limit, i use a virtual disk with a fix size to have a max limit size.
 	qemu-img create -f qcow2 $data_dir/garage_data.qcow2 "$weight"G