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217
lib/prompt.sh
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217
lib/prompt.sh
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#!/usr/bin/env bash
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# Interactive per-variable prompting.
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# Source this file; do not execute it directly.
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# Requires colors.sh and validate.sh to be sourced first.
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# _prompt_enum <var_name> <options_csv> <default>
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# Prints a numbered menu and returns the chosen value via stdout.
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_prompt_enum() {
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local var_name="$1"
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local options_csv="$2"
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local default="$3"
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local -a opts
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local IFS=','
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read -ra opts <<< "$options_csv"
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unset IFS
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local default_idx=0
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local i
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for i in "${!opts[@]}"; do
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printf " %d) %s" $((i + 1)) "${opts[$i]}" >&2
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if [[ "${opts[$i]}" == "$default" ]]; then
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printf " ${DIM}(default)${NC}" >&2
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default_idx=$((i + 1))
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fi
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printf "\n" >&2
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done
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local choice value
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while true; do
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if [[ $default_idx -gt 0 ]]; then
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read -r -p " Choice [1-${#opts[@]}, default ${default_idx}]: " choice >&2
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else
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read -r -p " Choice [1-${#opts[@]}]: " choice >&2
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fi
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# Empty input → use default
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if [[ -z "$choice" && $default_idx -gt 0 ]]; then
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echo "${opts[$((default_idx - 1))]}"
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return 0
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fi
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# Numeric selection
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if [[ "$choice" =~ ^[0-9]+$ ]] && (( choice >= 1 && choice <= ${#opts[@]} )); then
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echo "${opts[$((choice - 1))]}"
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return 0
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fi
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# Direct string match
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local opt
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for opt in "${opts[@]}"; do
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if [[ "$choice" == "$opt" ]]; then
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echo "$opt"
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return 0
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fi
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done
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printf "${RED} Invalid choice. Enter a number between 1 and %d.${NC}\n" "${#opts[@]}" >&2
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done
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}
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# _prompt_bool <default>
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# Prompts y/n and returns canonical "true" or "false" via stdout.
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_prompt_bool() {
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local default="$1"
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local hint
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case "${default,,}" in
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true|yes|1|y) hint="Y/n" ;;
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false|no|0|n) hint="y/N" ;;
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*) hint="y/n" ;;
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esac
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local input
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while true; do
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read -r -p " Enable? [${hint}]: " input >&2
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if [[ -z "$input" && -n "$default" ]]; then
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normalize_bool "$default"
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return 0
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fi
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case "${input,,}" in
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y|yes|true|1) echo "true"; return 0 ;;
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n|no|false|0) echo "false"; return 0 ;;
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*) printf "${RED} Enter y or n.${NC}\n" >&2 ;;
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esac
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done
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}
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# _prompt_secret <var_name> <default>
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# Reads a secret (hidden) value, with optional confirmation, via stdout.
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_prompt_secret() {
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local var_name="$1"
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local default="$2"
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local value confirm
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while true; do
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if [[ -n "$default" ]]; then
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read -r -s -p " Value (leave blank to keep default): " value >&2
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else
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read -r -s -p " Value: " value >&2
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fi
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printf "\n" >&2
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if [[ -z "$value" && -n "$default" ]]; then
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echo "$default"
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return 0
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fi
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if [[ -n "$value" ]]; then
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read -r -s -p " Confirm value: " confirm >&2
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printf "\n" >&2
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if [[ "$value" == "$confirm" ]]; then
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echo "$value"
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return 0
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fi
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printf "${RED} Values do not match. Try again.${NC}\n" >&2
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else
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printf "${RED} Value cannot be empty for a secret field with no default.${NC}\n" >&2
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fi
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done
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}
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# prompt_variable <var_name>
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# Interactively prompts the user for a value and stores it in ENV_VALUE_<var_name>.
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prompt_variable() {
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local var_name="$1"
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# Dereference metadata
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local desc_var="ENV_DESC_${var_name}"
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local type_var="ENV_TYPE_${var_name}"
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local required_var="ENV_REQUIRED_${var_name}"
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local default_var="ENV_DEFAULT_${var_name}"
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local desc="${!desc_var}"
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local type="${!type_var}"
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local required="${!required_var}"
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local default="${!default_var}"
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# ---- Header ----
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printf "\n" >&2
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printf "${BOLD}${CYAN}%s${NC}" "$var_name" >&2
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if [[ "$required" == "true" ]]; then
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printf " ${RED}(required)${NC}" >&2
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else
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printf " ${DIM}(optional)${NC}" >&2
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fi
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if [[ -n "$type" && "$type" != "string" ]]; then
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printf " ${DIM}[%s]${NC}" "$type" >&2
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fi
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printf "\n" >&2
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if [[ -n "$desc" ]]; then
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printf " ${DIM}%s${NC}\n" "$desc" >&2
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fi
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# ---- Type-specific prompt ----
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local value
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case "$type" in
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bool)
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value="$(_prompt_bool "$default")"
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;;
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secret)
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value="$(_prompt_secret "$var_name" "$default")"
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;;
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enum:*)
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local options="${type#enum:}"
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printf " ${DIM}Options:${NC}\n" >&2
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value="$(_prompt_enum "$var_name" "$options" "$default")"
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;;
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*)
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# Generic text input (string, number, url, email)
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local prompt_str
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if [[ -n "$default" ]]; then
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prompt_str=" Value (default: ${default}): "
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else
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prompt_str=" Value: "
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fi
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while true; do
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read -r -p "$prompt_str" value >&2
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if [[ -z "$value" ]]; then
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value="$default"
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fi
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if validate_value "$var_name" "$value" "$type" "$required"; then
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break
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fi
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done
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;;
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esac
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# For bool/enum/secret we still run the required check after collecting value
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if [[ "$type" == "bool" || "$type" == "secret" || "$type" == enum:* ]]; then
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while ! validate_value "$var_name" "$value" "$type" "$required"; do
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case "$type" in
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bool) value="$(_prompt_bool "$default")" ;;
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secret) value="$(_prompt_secret "$var_name" "$default")" ;;
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enum:*) value="$(_prompt_enum "$var_name" "${type#enum:}" "$default")" ;;
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esac
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done
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fi
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printf -v "ENV_VALUE_${var_name}" '%s' "$value"
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}
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# prompt_all_variables
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# Iterates over ENV_VARS and prompts for each one.
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prompt_all_variables() {
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local var_name
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for var_name in "${ENV_VARS[@]}"; do
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prompt_variable "$var_name"
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done
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}
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