style: Quote variables

.github/workflows/check.yml

@@ -11,4 +11,4 @@ jobs:
       - name: Run ShellCheck
         uses: ludeeus/action-shellcheck@master
 env:
-        SHELLCHECK_OPTS: -x --source-path=src -e SC2001 -e SC2223 -e SC2034 -e SC2064 -e SC2317 -e SC2153 -e SC2028
+        SHELLCHECK_OPTS: -x --source-path=src -e SC2001 -e SC2034 -e SC2064 -e SC2317 -e SC2153 -e SC2028

src/disk.sh

@@ -3,12 +3,12 @@ set -Eeuo pipefail
 
 # Docker environment variables
 
-: ${DISK_IO:='native'}          # I/O Mode, can be set to 'native', 'threads' or 'io_turing'
-: ${DISK_FMT:='raw'}            # Disk file format, 'raw' by default for best performance
-: ${DISK_FLAGS:=''}             # Specifies the options for use with the qcow2 disk format
-: ${DISK_CACHE:='none'}         # Caching mode, can be set to 'writeback' for better performance
-: ${DISK_DISCARD:='on'}         # Controls whether unmap (TRIM) commands are passed to the host.
-: ${DISK_ROTATION:='1'}         # Rotation rate, set to 1 for SSD storage and increase for HDD
+: "${DISK_IO:='native'}"          # I/O Mode, can be set to 'native', 'threads' or 'io_turing'
+: "${DISK_FMT:='raw'}"            # Disk file format, 'raw' by default for best performance
+: "${DISK_FLAGS:=''}"             # Specifies the options for use with the qcow2 disk format
+: "${DISK_CACHE:='none'}"         # Caching mode, can be set to 'writeback' for better performance
+: "${DISK_DISCARD:='on'}"         # Controls whether unmap (TRIM) commands are passed to the host.
+: "${DISK_ROTATION:='1'}"         # Rotation rate, set to 1 for SSD storage and increase for HDD
 
 BOOT="$STORAGE/$BASE.boot.img"
 SYSTEM="$STORAGE/$BASE.system.img"
@@ -472,14 +472,14 @@ fi
 
 DISK4_FILE="/storage4/data4"
 
-: ${DISK2_SIZE:=''}
-: ${DISK3_SIZE:=''}
-: ${DISK4_SIZE:=''}
+: "${DISK2_SIZE:=''}"
+: "${DISK3_SIZE:=''}"
+: "${DISK4_SIZE:=''}"
 
-: ${DEVICE:=''}        # Docker variables to passthrough a block device, like /dev/vdc1.
-: ${DEVICE2:=''}
-: ${DEVICE3:=''}
-: ${DEVICE4:=''}
+: "${DEVICE:=''}"        # Docker variables to passthrough a block device, like /dev/vdc1.
+: "${DEVICE2:=''}"
+: "${DEVICE3:=''}"
+: "${DEVICE4:=''}"
 
 if [ -n "$DEVICE" ]; then
   addDevice "userdata" "$DEVICE" "device" "3" "0xc" || exit $?

src/display.sh

@@ -3,8 +3,8 @@ set -Eeuo pipefail
 
 # Docker environment variables
 
-: ${GPU:='N'}           # GPU passthrough
-: ${DISPLAY:='none'}  # Display type
+: "${GPU:='N'}"           # GPU passthrough
+: "${DISPLAY:='none'}"  # Display type
 
 if [[ "$GPU" != [Yy1]* ]] || [[ "$ARCH" != "amd64" ]]; then
 

src/install.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -Eeuo pipefail
 
-: ${URL:=''}    # URL of the PAT file to be downloaded.
+: "${URL:=''}"    # URL of the PAT file to be downloaded.
 
 if [ -f "$STORAGE/dsm.ver" ]; then
   BASE=$(<"$STORAGE/dsm.ver")

src/network.sh

@@ -3,17 +3,17 @@ set -Eeuo pipefail
 
 # Docker environment variables
 
-: ${DHCP:='N'}
-: ${MAC:='02:11:32:AA:BB:CC'}
+: "${DHCP:='N'}"
+: "${MAC:='02:11:32:AA:BB:CC'}"
 
-: ${VM_NET_DEV:=''}
-: ${VM_NET_TAP:='dsm'}
-: ${VM_NET_MAC:="$MAC"}
-: ${VM_NET_HOST:='VirtualDSM'}
+: "${VM_NET_DEV:=''}"
+: "${VM_NET_TAP:='dsm'}"
+: "${VM_NET_MAC:="$MAC"}"
+: "${VM_NET_HOST:='VirtualDSM'}"
 
-: ${DNSMASQ_OPTS:=''}
-: ${DNSMASQ:='/usr/sbin/dnsmasq'}
-: ${DNSMASQ_CONF_DIR:='/etc/dnsmasq.d'}
+: "${DNSMASQ_OPTS:=''}"
+: "${DNSMASQ:='/usr/sbin/dnsmasq'}"
+: "${DNSMASQ_CONF_DIR:='/etc/dnsmasq.d'}"
 
 ADD_ERR="Please add the following setting to your container:"
 

src/print.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -Eeuo pipefail
 
-: ${DHCP:='N'}
+: "${DHCP:='N'}"
 
 info () { printf "%b%s%b" "\E[1;34m❯ \E[1;36m" "$1" "\E[0m\n" >&2; }
 error () { printf "%b%s%b" "\E[1;31m❯ " "ERROR: $1" "\E[0m\n" >&2; }

src/proc.sh

@@ -3,10 +3,10 @@ set -Eeuo pipefail
 
 # Docker environment variables
 
-: ${KVM:='Y'}
-: ${HOST_CPU:=''}
-: ${CPU_MODEL:='host'}
-: ${CPU_FEATURES:='+ssse3,+sse4.1,+sse4.2'}
+: "${KVM:='Y'}"
+: "${HOST_CPU:=''}"
+: "${CPU_MODEL:='host'}"
+: "${CPU_FEATURES:='+ssse3,+sse4.1,+sse4.2'}"
 
 [ "$ARCH" != "amd64" ] && KVM="N"
 

src/reset.sh

@@ -11,15 +11,15 @@ trap 'error "Status $? while: $BASH_COMMAND (line $LINENO/$BASH_LINENO)"' ERR
 
 # Docker environment variables
 
-: ${TZ:=''}             # System local timezone
-: ${DEBUG:='N'}         # Disable debugging mode
-: ${COUNTRY:=''}        # Country code for mirror
-: ${CONSOLE:='N'}       # Disable console mode
-: ${ALLOCATE:=''}       # Preallocate diskspace
-: ${ARGUMENTS:=''}      # Extra QEMU parameters
-: ${CPU_CORES:='1'}     # Amount of CPU cores
-: ${RAM_SIZE:='1G'}     # Maximum RAM amount
-: ${DISK_SIZE:='16G'}   # Initial data disk size
+: "${TZ:=''}"             # System local timezone
+: "${DEBUG:='N'}"         # Disable debugging mode
+: "${COUNTRY:=''}"        # Country code for mirror
+: "${CONSOLE:='N'}"       # Disable console mode
+: "${ALLOCATE:=''}"       # Preallocate diskspace
+: "${ARGUMENTS:=''}"      # Extra QEMU parameters
+: "${CPU_CORES:='1'}"     # Amount of CPU cores
+: "${RAM_SIZE:='1G'}"     # Maximum RAM amount
+: "${DISK_SIZE:='16G'}"   # Initial data disk size
 
 # Helper variables
 

src/serial.sh

@@ -3,11 +3,11 @@ set -Eeuo pipefail
 
 # Docker environment variables
 
-: ${HOST_MAC:=''}
-: ${HOST_DEBUG:=''}
-: ${HOST_SERIAL:=''}
-: ${HOST_MODEL:=''}
-: ${GUEST_SERIAL:=''}
+: "${HOST_MAC:=''}"
+: "${HOST_DEBUG:=''}"
+: "${HOST_SERIAL:=''}"
+: "${HOST_MODEL:=''}"
+: "${GUEST_SERIAL:=''}"
 
 HOST_ARGS=()
 HOST_ARGS+=("-cpu=$CPU_CORES")