feat(workspace): add interactive build choices

build-sbx.sh

@@ -19,9 +19,74 @@ require_command() {
     fi
 }
 
+ask_yes_no() {
+    local prompt="$1"
+    local answer
+
+    while true; do
+        read -r -p "$prompt [y/n] " answer || exit 0
+        case "$answer" in
+            [Yy]) return 0 ;;
+            [Nn]) return 1 ;;
+            *) printf 'Please answer yes or no.\n' ;;
+        esac
+    done
+}
+
+prompt_component() {
+    local result_var="$1"
+    local label="$2"
+    shift 2
+    local options=("$@" custom)
+    local choice custom_value
+
+    while true; do
+        printf '%s:\n' "$label"
+        select choice in "${options[@]}"; do
+            case "$choice" in
+                custom)
+                    read -r -p "Custom $label: " custom_value || exit 0
+                    if [[ -n "$custom_value" ]]; then
+                        printf -v "$result_var" '%s' "$custom_value"
+                        return 0
+                    fi
+                    printf 'The custom value cannot be empty.\n'
+                    ;;
+                '') printf 'Please select one of the listed options.\n' ;;
+                *)
+                    printf -v "$result_var" '%s' "$choice"
+                    return 0
+                    ;;
+            esac
+        done
+    done
+}
+
 main() {
     require_command sbx 'We cannot build a Docker sbx image because sbx does not seem to be installed.'
     require_command jq 'We cannot list existing Docker sbx sandboxes because jq does not seem to be installed.'
+
+    local build_from_scratch
+    if ask_yes_no 'Build from scratch?'; then
+        build_from_scratch=true
+    else
+        build_from_scratch=false
+    fi
+
+    local sandbox_json
+    if ! sandbox_json=$(sbx ls --json); then
+        printf 'Unable to retrieve the existing Docker sbx sandboxes.\n' >&2
+        exit 1
+    fi
+
+    if ! jq -s -e 'length == 1 and (.[0].sandboxes | type == "array")' \
+        <<< "$sandbox_json" >/dev/null; then
+        printf 'The output from sbx ls --json was not the expected JSON format.\n' >&2
+        exit 1
+    fi
+
+    local -a sandbox_names
+    mapfile -t sandbox_names < <(jq -r '.sandboxes[].name' <<< "$sandbox_json")
 }
 
 main "$@"