! readlink "${BASH_SOURCE[0]}" instead of $0

readlink "${BASH_SOURCE[0]}" will success even run by
`bash -x foo`, foo script is found from $PATH

Author: oldratlee

bin/uq

@@ -13,7 +13,7 @@
 set -eEuo pipefail
 
 PROG="$(basename "$0")"
-PROG_PATH="$(readlink -f "$0")"
+PROG_PATH="$(readlink -f "${BASH_SOURCE[0]}")"
 PROG_DIR="$(dirname "$PROG_PATH")"
 
 ################################################################################

bin/xpf

@@ -10,5 +10,6 @@
 # @author Jerry Lee (oldratlee at gmail dot com)
 set -eEuo pipefail
 
+# BASE="$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")"
 BASE="$(dirname "$0")"
 source "$BASE/xpl" "$@"

lib/console-text-color-themes.sh

@@ -5,7 +5,7 @@
 # @online-doc https://github.com/oldratlee/useful-scripts/blob/dev-2.x/docs/shell.md#-console-text-color-themessh
 # @author Jerry Lee (oldratlee at gmail dot com)
 
-readonly _ctct_PROG="$(basename "$(readlink -f "$0")")"
+readonly _ctct_PROG="$(basename "$(readlink -f "${BASH_SOURCE[0]}")")"
 [ "$_ctct_PROG" == 'console-text-color-themes.sh' ] && readonly _ctct_is_direct_run=true
 
 readonly _ctct_ec=$'\033'      # escape char