introduce --verbosity flag rather than mixed logging settings; correct color misnaming to ANSI convention; added sanity-check; simplified hello-world; created FZF_USER_INPUT to replace the confusing FZF_HEAD and FZF_TAIL

zsh/lib/utils/io.print.zsh

@@ -0,0 +1,38 @@
+PRINT() {
+	local MESSAGE
+	local LAST_LINE_END='\n'
+	local STDERR=1
+	local STDOUT=0
+
+	local LTRIM=1
+	while [[ $# -gt 0 ]]
+	do
+		case $1 in
+			-n | --no-trim-tabs ) LTRIM=0 ;;
+			-x | --no-line-end  ) LAST_LINE_END='' ;;
+			-o | --use-stdout   ) STDOUT=1; STDERR=0 ;;
+			* ) MESSAGE+="$(echo $1) " ;;
+		esac
+		shift 1
+	done
+
+	MESSAGE="$(echo "$MESSAGE" | sed 's/%/%%/g')"
+
+	local STYLED_MESSAGE="$({
+		printf "${COLOR}"
+		while IFS='' read line
+		do
+			[[ $PREFIX =~ ^[[:space:]]\+$ ]] && printf '\n'
+
+			printf "${PREFIX} : $(echo "$line" | sed 's/^	\+//; s/ \+$//')"
+
+			PREFIX=$(echo $PREFIX | sed 's/./ /g')
+		done <<< $MESSAGE
+	})"
+	STYLED_MESSAGE="${COLOR}$(echo "$STYLED_MESSAGE" | sed 's/%/%%/g')${__COLOR_RESET}${LAST_LINE_END}"
+
+	[[ $STDERR -eq 1 ]] && printf $STYLED_MESSAGE >&2
+	[[ $STDOUT -eq 1 ]] && printf $STYLED_MESSAGE
+
+	return 0
+}