feat: add device status interaction and early abort

scripts/installer.sh

@@ -29,6 +29,27 @@ run_module "$SCRIPT_DIR/modules/00_preflight.sh" "always"
 run_module "$SCRIPT_DIR/modules/05_network.sh" "always"
 run_module "$SCRIPT_DIR/modules/10_hardware.sh" "always"
 run_module "$SCRIPT_DIR/modules/15_server_handshake.sh" "always"
+run_module "$SCRIPT_DIR/modules/17_device_status.sh" "always"
+PROVISIONING_STATE_FILE="/run/tuxflotte/provisioning/state.env"
+
+[[ -r "$PROVISIONING_STATE_FILE" ]] ||
+  error_exit "Provisionierungszustand fehlt: $PROVISIONING_STATE_FILE"
+
+# shellcheck disable=SC1090
+source "$PROVISIONING_STATE_FILE"
+
+case "${TUXFLOTTE_PROVISIONING_CONTINUE:-}" in
+  true)
+    log_info "Provisionierung wird fortgesetzt."
+    ;;
+  false)
+    log_info "Provisionierung wurde durch den Benutzer kontrolliert beendet."
+    exit 0
+    ;;
+  *)
+    error_exit "Ungültiger Provisionierungszustand."
+    ;;
+esac
 run_module "$SCRIPT_DIR/modules/20_profile_selection.sh" "always"
 run_module "$SCRIPT_DIR/modules/25_installation_confirm.sh" "always"
 

scripts/modules/17_device_status.sh

@@ -0,0 +1,127 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+SCRIPT_NAME="$(basename "${BASH_SOURCE[0]}")"
+readonly SCRIPT_NAME
+
+readonly SERVER_RESPONSE_FILE="/run/tuxflotte/server/response.json"
+readonly RUNTIME_DIR="/run/tuxflotte/provisioning"
+readonly STATE_FILE="${RUNTIME_DIR}/state.env"
+
+log() {
+    printf '[%s] %s\n' "${SCRIPT_NAME}" "$*" >&2
+}
+
+fatal() {
+    printf '[%s] FEHLER: %s\n' "${SCRIPT_NAME}" "$*" >&2
+    exit 1
+}
+
+require_root() {
+    if [[ "${EUID}" -ne 0 ]]; then
+        fatal "Das Gerätestatusmodul muss als root ausgeführt werden."
+    fi
+}
+
+prepare_runtime() {
+    install -d \
+        --mode=0700 \
+        --owner=root \
+        --group=root \
+        "${RUNTIME_DIR}"
+
+    rm -f -- "${STATE_FILE}"
+}
+
+store_provisioning_state() {
+    local continue_provisioning="$1"
+
+    umask 077
+
+    printf 'TUXFLOTTE_PROVISIONING_CONTINUE=%s\n' \
+        "${continue_provisioning}" >"${STATE_FILE}"
+
+    chmod 0600 "${STATE_FILE}"
+}
+
+validate_server_response() {
+    [[ -r "${SERVER_RESPONSE_FILE}" ]] ||
+        fatal "Serverantwort nicht gefunden: ${SERVER_RESPONSE_FILE}"
+
+    jq --exit-status '
+        .success == true
+        and (.device | type == "object")
+        and (.device.registration_status == "existing"
+             or .device.registration_status == "registered")
+        and (.customer | type == "object")
+    ' "${SERVER_RESPONSE_FILE}" >/dev/null ||
+        fatal "Serverantwort enthält keinen gültigen Gerätestatus."
+}
+
+show_device_status() {
+    local registration_status
+    local hostname
+    local organization_name
+
+    registration_status="$(
+        jq -r '.device.registration_status' "${SERVER_RESPONSE_FILE}"
+    )"
+
+    hostname="$(
+        jq -r '.device.hostname // "unbekannt"' "${SERVER_RESPONSE_FILE}"
+    )"
+
+    organization_name="$(
+        jq -r '.customer.name // "unbekannt"' "${SERVER_RESPONSE_FILE}"
+    )"
+
+    printf '\n'
+
+    case "${registration_status}" in
+        existing)
+            printf 'Bekanntes Gerät erkannt\n'
+            printf '========================\n\n'
+            printf 'Gerät:        %s\n' "${hostname}"
+            printf 'Organisation: %s\n' "${organization_name}"
+            printf '\n'
+            printf 'Das Gerät ist bereits registriert.\n'
+            ;;
+        registered)
+            printf 'Neues Gerät registriert\n'
+            printf '=======================\n\n'
+            printf 'Gerät:        %s\n' "${hostname}"
+            printf 'Organisation: %s\n' "${organization_name}"
+            printf '\n'
+            printf 'Hinweis:\n'
+            printf 'Die Registrierung erfolgte über den temporären Bootstrap-Aktivierungsmechanismus.\n'
+            ;;
+    esac
+}
+
+confirm_provisioning() {
+    local answer
+
+    printf '\n'
+    read -r -p "Provisionierung fortsetzen? [j/N]: " answer
+
+    case "${answer}" in
+        j|J|ja|JA|Ja)
+            store_provisioning_state true
+            log "Provisionierung wird fortgesetzt."
+            ;;
+        *)
+            store_provisioning_state false
+            log "Provisionierung wurde durch den Benutzer beendet."
+            ;;
+    esac
+}
+
+main() {
+    require_root
+    prepare_runtime
+    validate_server_response
+    show_device_status
+    confirm_provisioning
+}
+
+main "$@"