Fix all Shellcheck SC2053 violations.

README.md

@@ -252,7 +252,7 @@ These are guidelines that we strongly encourage developers to follow.
 It's nice to have a bash package that can be used in the terminal and also be invoked as a command line function. To achieve this the exporting of your functionality *should* follow this pattern:
 
 ```sh
-if [[ ${BASH_SOURCE[0]} != $0 ]]; then
+if [[ ${BASH_SOURCE[0]} != "$0" ]]; then
   export -f my_script
 else
   my_script "${@}"

bpkg.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 ## prevent sourcing
-if [[ ${BASH_SOURCE[0]} != $0 ]]; then
+if [[ ${BASH_SOURCE[0]} != "$0" ]]; then
   echo >&2 "error: \`bpkg' cannot be sourced"
   return 1
 fi

lib/getdeps/getdeps.sh

@@ -43,7 +43,7 @@ bpkg_getdeps () {
   return 0
 }
 
-if [[ ${BASH_SOURCE[0]} != $0 ]]; then
+if [[ ${BASH_SOURCE[0]} != "$0" ]]; then
   export -f bpkg_getdeps
 else
   bpkg_getdeps "${@}"

lib/init/init.sh

@@ -231,7 +231,7 @@ create_shell_file () {
       echo "  ## your code here"
       echo "}"
       echo
-      echo 'if [[ ${BASH_SOURCE[0]} != $0 ]]; then'
+      echo 'if [[ ${BASH_SOURCE[0]} != "$0" ]]; then'
       echo "  export -f $NAME"
       echo 'else'
       echo "  $NAME "'"${@}"'
@@ -325,7 +325,7 @@ bpkg_init () {
 }
 
 ## export or run
-if [[ ${BASH_SOURCE[0]} != $0 ]]; then
+if [[ ${BASH_SOURCE[0]} != "$0" ]]; then
   export -f bpkg-init
 else
   bpkg_init "${@}"

lib/install/install.sh

@@ -485,7 +485,7 @@ bpkg_install_from_remote () {
 }
 
 ## Use as lib or perform install
-if [[ ${BASH_SOURCE[0]} != $0 ]]; then
+if [[ ${BASH_SOURCE[0]} != "$0" ]]; then
   export -f bpkg_install
 elif validate_parameters; then
   bpkg_install "${@}"

lib/list/list.sh

@@ -73,7 +73,7 @@ bpkg_list () {
 }
 
 
-if [[ ${BASH_SOURCE[0]} != $0 ]]; then
+if [[ ${BASH_SOURCE[0]} != "$0" ]]; then
   export -f bpkg_list
 elif bpkg_validate; then
   bpkg_list "${@}"

lib/package/package.sh

@@ -49,7 +49,7 @@ bpkg_package () {
   return 0
 }
 
-if [[ ${BASH_SOURCE[0]} != $0 ]]; then
+if [[ ${BASH_SOURCE[0]} != "$0" ]]; then
   export -f bpkg_package
 else
   bpkg_package "${@}"

lib/show/show.sh

@@ -190,7 +190,7 @@ bpkg_show () {
   return 1
 }
 
-if [[ ${BASH_SOURCE[0]} != $0 ]]; then
+if [[ ${BASH_SOURCE[0]} != "$0" ]]; then
   export -f bpkg_show
 elif bpkg_validate; then
   bpkg_show "${@}"

lib/suggest/suggest.sh

@@ -93,7 +93,7 @@ suggest () {
 }
 
 ## export or run
-if [[ ${BASH_SOURCE[0]} != $0 ]]; then
+if [[ ${BASH_SOURCE[0]} != "$0" ]]; then
   export -f suggest
 else
   suggest "$@"

lib/term/term.sh

@@ -286,7 +286,7 @@ term () {
 ## detect if being sourced and
 ## export if so else execute
 ## main function with args
-if [[ ${BASH_SOURCE[0]} != $0 ]]; then
+if [[ ${BASH_SOURCE[0]} != "$0" ]]; then
   export -f term
 else
   term "${@}"

lib/update/update.sh

@@ -75,7 +75,7 @@ bpkg_update () {
   done
 }
 
-if [[ ${BASH_SOURCE[0]} != $0 ]]; then
+if [[ ${BASH_SOURCE[0]} != "$0" ]]; then
   export -f bpkg_update
 elif bpkg_validate; then
   bpkg_update "${@}"