Create Bash completion script

contrib/runiq.bash

@@ -0,0 +1,63 @@
+_runiq() {
+	local i cur prev opts cmds
+	COMPREPLY=()
+	cur="${COMP_WORDS[COMP_CWORD]}"
+	prev="${COMP_WORDS[COMP_CWORD-1]}"
+	cmd=""
+	opts=""
+
+	for i in ${COMP_WORDS[@]}
+	do
+		case "${i}" in
+			runiq)
+				cmd="runiq"
+				;;
+
+			*)
+				;;
+		esac
+	done
+
+	# The case statement checking the command name could simply be replaced with an if statement,
+	# but this way makes it easier if one ultimately wants to handle completions for multiple commands within a single file.
+
+	case "${cmd}" in
+		runiq)
+			# opts="-h --help -i --invert -s --statistics -V --version -f --filter"
+			# Don't offer to complete short options for which equivalent long options exist.
+			opts="--help --invert --statistics --version --filter"
+			if [[ ${cur} == -* || ${COMP_CWORD} -eq 1 ]] ; then
+				COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+				return 0
+			fi
+			case "${prev}" in
+
+				-h | --help | -V | --version)
+					return 0 # No other arguments matter if any of these is passed, so don't bother offering completions for any more unless the user tries to complete from another '-'
+					;;
+				-i | --invert)
+					COMPREPLY=($(compgen -f ${cur}))
+					return 0
+					;;
+				-s | --statistics)
+					COMPREPLY=($(compgen -f ${cur}))
+					return 0
+					;;
+				-f|--filter)
+					COMPREPLY=($(compgen -W "sorted bloom naive digest" -- ${cur}))
+					return 0
+					;;
+				--)
+					_filedir
+					return 0
+					;;
+				*)
+					;;
+			esac
+			COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+			return 0
+			;;
+		# Don't consider any other cases.
+	esac
+}
+complete -F _runiq -o bashdefault -o default runiq