Replace sequential "how far" installer with interactive multi-select module chooser

custom-words.txt

@@ -5,6 +5,8 @@ buildah
 buildx
 chcon
 chgrp
+civis
+cnorm
 codeready
 containerd
 dotenv
@@ -22,6 +24,7 @@ mktemp
 nodocker
 NOPASSWD
 opencontainers
+padlen
 realpath
 Retzky
 rmul
@@ -30,6 +33,7 @@ runnerdir
 runsvc
 runuser
 scriptnum
+setab
 setaf
 setsebool
 shellenv

shared/setup.sh

@@ -2,18 +2,81 @@
 
 scr_dir="${0%/*}"
 
+# Multi-select menu in pure bash
+multi_select_menu() {
+   local cursor=0
+   local key
+   local options=("$@")
+   local selected=()
+
+   # Find the length of the longest option, and set selections to false
+   local maxlen=0
+   for ((i=0; i<${#options[@]}; i++)); do
+      (( ${#options[i]} > maxlen )) && maxlen=${#options[i]}
+      selected[i]=false
+   done
+   local padlen=$((maxlen + 7))
+
+   tput sc >&2 && tput civis >&2
+   while true; do
+      tput rc >&2
+      for ((i=0; i<${#options[@]}; i++)); do
+         tput el >&2
+         box=○ && ${selected[i]} && box=◉
+         # shellcheck disable=SC2059
+         printf -v line "%-*s" "$padlen" " $box ${options[i]}"
+         ((cursor==i)) && tput setab 4 >&2 && tput setaf 7 >&2
+         echo "$line" >&2
+         tput sgr0 >&2
+      done
+      tput dim >&2
+      echo "Use ↑/↓ to move, SPACE to select/deselect, ENTER to confirm." >&2
+      tput sgr0 >&2
+
+      # Read key
+      IFS= read -rsn1 key
+      if [[ $key == $'\x1b' ]]; then
+         read -rsn2 key
+         if [[ $key == "[A" ]]; then
+            ((cursor--))
+            ((cursor<0)) && cursor=$((${#options[@]}-1))
+         elif [[ $key == "[B" ]]; then
+            ((cursor++))
+            ((cursor>=${#options[@]})) && cursor=0
+         fi
+      elif [[ $key == " " ]]; then
+         if ${selected[cursor]}; then selected[cursor]=false; else selected[cursor]=true; fi
+      elif [[ $key == "" ]]; then
+         break
+      fi
+   done
+
+   # Show cursor
+   tput cnorm >&2
+
+   # Collect selected items
+   local result=()
+   for ((i=0; i<${#selected[@]}; i++)); do
+      ${selected[i]} && result+=("$i")
+   done
+   echo "${result[@]}"
+}
+
 # Get all scripts, and compile their titles into an array of choices
 # shellcheck disable=SC2207
 scripts=( $(ls "$scr_dir"/?-*.sh 2>/dev/null) )
 if [ ${#scripts[@]} -eq 0 ]; then echo "$(tput setaf 1)There are no steps defined for this setup script. Sorry!$(tput sgr0)"; exit 1; fi
 for file in "${scripts[@]}"; do choices+=( "$($file --title)" ); done
 
-PS3='How far in the installation process do you want to go? '
-select choice in "${choices[@]}"; do
-   if [ -z "$choice" ]; then echo 'That is not a valid choice.'; else break; fi
+echo "$(tput bold)Select the modules to install:$(tput sgr0)"
+while true; do
+   selected_indices=$(multi_select_menu "${choices[@]}")
+   [[ -n $selected_indices ]] && break
+   tput setaf 1 && echo 'Please select at least one module.' && tput sgr0
 done
 
-for (( i=0; i<REPLY; i++ )); do
+read -ra indices_array <<< "$selected_indices"
+for i in "${indices_array[@]}"; do
    script="${scripts[$i]}"
    clear
    $script