feat: add verified clean reinstall workflow

.gitea/workflows/release.yml

@@ -66,14 +66,16 @@ jobs:
           ./scripts/test-git-install-fixture.sh
           ./scripts/test-update-fixture.sh
           ./scripts/test-baota-start-fixture.sh
+          ./scripts/test-purge-fixture.sh
           ./scripts/test-gitea-publish-fixture.sh
           shellcheck deploy/install.sh deploy/install-from-git.sh deploy/update.sh deploy/baota-start.sh \
+            deploy/purge.sh \
             scripts/check-semver.sh \
             scripts/package-release.sh scripts/publish-gitea-release.sh \
             scripts/generate-release-key.sh scripts/test-install-fixture.sh \
             scripts/test-git-install-fixture.sh \
             scripts/test-update-fixture.sh scripts/test-gitea-publish-fixture.sh \
-            scripts/test-baota-start-fixture.sh \
+            scripts/test-baota-start-fixture.sh scripts/test-purge-fixture.sh \
             scripts/verify-release.sh
 
       - name: Build and sign release assets

README.md

@@ -56,17 +56,37 @@ PostgreSQL 18。PostgreSQL 兼容开发已冻结，不属于本次 Preview 发
 外部数据库，不需要服务器安装 MySQL CLI。应用固定安装到 `/opt/kaidi`、`/var/lib/kaidi`、
 `/var/lib/kaidi-update` 和 `/etc/kaidi`。安装器不安装、不启动也不修改 Nginx、Caddy、宝塔或其他反向代理。
 
+### 彻底清理旧安装
+
+重新安装前先在宝塔面板停止并删除名为 `kaidi-finance` 的 Java 项目，避免面板守护进程重新拉起旧 Java。
+随后执行一键清理：
+
+```bash
+curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.24/purge.sh \
+  -o /tmp/kaidi-purge.sh \
+  && printf '%s  %s\n' c49c5460260d2c67d88aced99463e3d98a67f8ef0309f5c8d5d8a8f5e4addf36 /tmp/kaidi-purge.sh \
+    | sha256sum -c - \
+  && sudo env KAIDI_PURGE_CONFIRM=DELETE_LOCAL_KAIDI_INSTALLATION bash /tmp/kaidi-purge.sh \
+  && rm -f /tmp/kaidi-purge.sh
+```
+
+清理脚本会先停止 systemd 和遗留 Kaidi 进程，将旧配置、文件存储、安装码以及已有数据库备份归档到
+`/root/kaidi-reinstall-backups/`，再删除 `/opt/kaidi`、`/www/wwwroot/kaidi`、`/etc/kaidi`、
+`/var/lib/kaidi`、`/var/lib/kaidi-update`、`/var/log/kaidi` 和三个 systemd 单元。恢复包权限固定为
+`0600`，确认新安装及数据无误后再由 root 删除。脚本不删除外部 MySQL、系统 Java、Nginx 或宝塔站点配置；
+新安装必须连接一个新的空 MySQL 数据库，旧数据库保留用于回滚。
+
 ### 直接 curl 安装
 
 ```bash
-curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.19/install.sh | sudo bash
+curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.24/install.sh | sudo bash
 ```
 
 这条命令会提示填写 Java 应用端口，直接回车使用 `18080`；随后安装最新签名 Release，并默认进入 `/setup`
 安装向导。Java 默认只监听 `127.0.0.1:所选端口`，前端页面、API 和健康检查均由同一端口提供。无人值守安装可直接指定：
 
 ```bash
-curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.19/install.sh \
+curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.24/install.sh \
   | sudo env KAIDI_APP_PORT=19090 bash
 ```
 
@@ -74,8 +94,8 @@ curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-previe
 时才设置 `KAIDI_SERVER_ADDRESS=0.0.0.0`，通常应保持默认回环绑定并由本机反向代理访问。需要在执行前独立校验安装脚本时使用：
 
 ```bash
-curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.19/install.sh -o /tmp/kaidi-install.sh
+curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.24/install.sh -o /tmp/kaidi-install.sh
-printf '%s  %s\n' bc9001197af843dc323907a98023064ccc4f184e000543d2086b8a6f8161dbc7 /tmp/kaidi-install.sh | sha256sum -c -
+printf '%s  %s\n' 6256b05025aa314d4c02e7c0f5d2ca530f28ec5d10f833504b34c09ada6e02a5 /tmp/kaidi-install.sh | sha256sum -c -
 sudo bash /tmp/kaidi-install.sh
 rm -f /tmp/kaidi-install.sh
 ```
@@ -86,7 +106,7 @@ rm -f /tmp/kaidi-install.sh
 包装器会在 `sudo` 前校验 `deploy/install.sh` 的固定 SHA-256，再按同一公钥信任链安装最新签名 Release。
 
 ```bash
-git clone --branch v1.0.0-preview.19 --depth 1 https://git.awaioi.com/ERP-Team/kaidi.git kaidi-preview
+git clone --branch v1.0.0-preview.24 --depth 1 https://git.awaioi.com/ERP-Team/kaidi.git kaidi-preview
 cd kaidi-preview
 ./deploy/install-from-git.sh
 ```
@@ -106,6 +126,21 @@ cd kaidi-preview
 - 向导只初始化一个由操作者填写的 `SYSTEM_ADMIN` 管理员，不创建项目、财务、资料或演示账号。
 - 安装器把一次性安装码写入仅 root 可读的 `/root/kaidi-first-login.txt`；完成向导后写入锁定标记并切换正式应用。
 
+### 环境变量与密钥安全
+
+首次安装不需要在命令行或宝塔项目中填写数据库环境变量。数据库地址、账号和密码只在 `/setup` 向导中提交，
+完成后写入 `/var/lib/kaidi/setup/application.env`；字段加密密钥由安装器生成并写入
+`/etc/kaidi/kaidi.env`。两个文件不会把秘密放进 Java 启动参数或 `ps` 输出，并由 Linux 文件权限限制为
+root 或专用 `kaidi` 服务账号读取。运行中的 Java 仍必须持有这些值，因此 root 和该服务账号始终属于受信边界。
+
+不要通过公网 HTTP 提交数据库密码。应先为域名配置有效 HTTPS，或通过 SSH 端口转发访问本机回环地址完成向导：
+
+```bash
+ssh -L 18080:127.0.0.1:18080 root@SERVER_IP
+```
+
+然后在本机浏览器打开 `http://127.0.0.1:18080/setup`。向导完成后自动锁定，安装码不能再次使用。
+
 安装完成后先执行 `sudo cat /root/kaidi-first-login.txt`，其中会显示准确的反向代理目标和一次性安装码。配置反向代理后，
 通过域名的 `/setup` 完成数据库和管理员配置，再访问域名根路径登录。Preview 使用 HTTP 时安装器默认设置
 `SESSION_COOKIE_SECURE=false`；配置 HTTPS 反向代理后，应在 `/etc/kaidi/kaidi.env` 改为
@@ -141,7 +176,7 @@ sudo cat /root/kaidi-first-login.txt
 32 位服务端镜像，因此 32 位主机需要预先连接一台 MySQL 8.4 数据库，之后仍然只执行一个安装命令：
 
 ```bash
-curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.19/install.sh | sudo bash
+curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.24/install.sh | sudo bash
 ```
 
 无论主机架构如何，安装器都不会安装 MySQL、数据库客户端或创建数据库容器。在打开向导前，需要预先创建 `kaidi_finance`，并授予安装账号该库的
@@ -163,7 +198,7 @@ GRANT ALL PRIVILEGES ON kaidi_finance.* TO 'kaidi'@'KAIDI_SERVER_IP';
 管理员数据和运维人员新增的环境变量：
 
 ```bash
-curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.23/install.sh \
+curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.24/install.sh \
   | sudo env KAIDI_REINSTALL=true KAIDI_SETUP_WIZARD=false bash
 ```
 
@@ -174,7 +209,7 @@ curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-previe
 如果安装器已完成但向导尚未提交，可执行下面的命令重新生成一次性安装码；该恢复路径只接受仍处于向导模式且未锁定的安装，正式模式不会被覆盖。
 
 ```bash
-curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.23/install.sh \
+curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-preview.24/install.sh \
   | sudo env KAIDI_REINSTALL=true KAIDI_SETUP_WIZARD=true bash
 ```
 
@@ -185,7 +220,7 @@ curl -fsSL https://git.awaioi.com/ERP-Team/kaidi/releases/download/v1.0.0-previe
 推荐采用版本目录加 `current` 软链接：
 
 ```bash
-VERSION=1.0.0-preview.23
+VERSION=1.0.0-preview.24
 RELEASE_ROOT=/www/wwwroot/kaidi/releases/$VERSION
 sudo install -d -o root -g kaidi -m 0750 "$RELEASE_ROOT"
 curl -fL "https://git.awaioi.com/ERP-Team/kaidi/releases/download/v$VERSION/kaidi-finance-$VERSION.tar.gz" \
@@ -263,13 +298,13 @@ base64 < release-signing-private.pem | tr -d '\n'
 Release；生产服务器从公共 Release 下载，不保存 Token。私钥不得提交到 Git。`.gitea/workflows/release.yml` 要求
 act_runner 提供 `ubuntu-24.04` 标签，并在 tag 发布时执行后端、前端、OpenAPI、Shell、安装/更新和浏览器门禁。
 
-工作流先建立不可见草稿，再显式上传并核对 9 个资产的名称和大小，最后才发布为 `/releases/latest`。Gitea 的
+工作流先建立不可见草稿，再显式上传并核对 10 个资产的名称和大小，最后才发布为 `/releases/latest`。Gitea 的
 `latest` 会排除 `prerelease=true`，因此即使 tag 名含 `preview`，发布记录的 `prerelease` 也固定为 `false`；
 Preview 属性由 SemVer 版本名表达。之后推送 tag 即会构建、测试、签名并发布：
 
 ```bash
-git tag v1.0.0-preview.19
+git tag v1.0.0-preview.24
-git push origin v1.0.0-preview.19
+git push origin v1.0.0-preview.24
 ```
 
 在线更新使用独立的 TDesign 页面：隔离的系统管理员进入“系统治理 → 系统更新”。权限与配置页只管理用户、角色、数据范围、表单模板和参数版本，不配置系统名称或域名。
@@ -321,13 +356,13 @@ cat /var/lib/kaidi-update/status.json
 ```bash
 KAIDI_RELEASE_SIGNING_KEY=/secure/release-signing-private.pem \
 KAIDI_TRUSTED_RELEASE_PUBLIC_KEY_SHA256=807c6aec1dc3f7ce494db16aa9d763c66f292033c38f328afd0390d2715a8cd9 \
-  ./scripts/package-release.sh 1.0.0-preview.19
+  ./scripts/package-release.sh 1.0.0-preview.24
 KAIDI_TRUSTED_RELEASE_PUBLIC_KEY_SHA256=807c6aec1dc3f7ce494db16aa9d763c66f292033c38f328afd0390d2715a8cd9 \
   ./scripts/verify-release.sh dist/release
 ```
 
-输出位于 `dist/release/`，包含安装脚本、签名清单、公钥、SHA-256 清单、前后端 CycloneDX SBOM、
+输出位于 `dist/release/`，包含安装脚本、彻底清理脚本、签名清单、公钥、SHA-256 清单、前后端 CycloneDX
-首次安装指纹文件和完整应用压缩包。
+SBOM、首次安装指纹文件和完整应用压缩包。
 打包脚本会把 Maven `revision` 与 npm 包版本临时绑定到 Release SemVer，构建结束后恢复工作区源文件；
 JAR、两个 SBOM、签名清单或 tag 的版本只要有一项不一致，发布即失败。
 签名清单同时绑定应用包、两份 SBOM、安装器、公钥、bootstrap 指纹和 Git 源码修订；本地脏工作区会明确记录

deploy/install-from-git.sh

@@ -5,7 +5,7 @@ umask 077
 
 ROOT=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
 INSTALLER="$ROOT/deploy/install.sh"
-INSTALLER_SHA256=${KAIDI_INSTALLER_SHA256:-bc9001197af843dc323907a98023064ccc4f184e000543d2086b8a6f8161dbc7}
+INSTALLER_SHA256=${KAIDI_INSTALLER_SHA256:-6256b05025aa314d4c02e7c0f5d2ca530f28ec5d10f833504b34c09ada6e02a5}
 RELEASE_API_URL=${KAIDI_RELEASE_API_URL:-https://git.awaioi.com/api/v1/repos/ERP-Team/kaidi/releases/latest}
 PUBLIC_KEY_SHA256=${KAIDI_RELEASE_PUBLIC_KEY_SHA256:-807c6aec1dc3f7ce494db16aa9d763c66f292033c38f328afd0390d2715a8cd9}
 TOKEN_FILE=${KAIDI_RELEASE_TOKEN_FILE:-}

deploy/purge.sh

@@ -0,0 +1,199 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+umask 077
+
+APP_ROOT=/opt/kaidi
+BAOTA_ROOT=/www/wwwroot/kaidi
+CONFIG_ROOT=/etc/kaidi
+STATE_ROOT=/var/lib/kaidi
+UPDATE_STATE_ROOT=/var/lib/kaidi-update
+LOG_ROOT=/var/log/kaidi
+FIRST_LOGIN_FILE=/root/kaidi-first-login.txt
+BACKUP_ROOT=${KAIDI_PURGE_BACKUP_ROOT:-/root/kaidi-reinstall-backups}
+CONFIRMATION=${KAIDI_PURGE_CONFIRM:-}
+REQUIRED_CONFIRMATION=DELETE_LOCAL_KAIDI_INSTALLATION
+SERVICE_USER=kaidi
+SERVICE_GROUP=kaidi
+BACKUP_ARCHIVE=
+
+log() { printf '[kaidi-purge] %s\n' "$*"; }
+die() { printf '[kaidi-purge] ERROR: %s\n' "$*" >&2; exit 1; }
+
+systemd_available() {
+  command -v systemctl >/dev/null 2>&1 && [ -d /run/systemd/system ]
+}
+
+validate_inputs() {
+  [ "$(id -u)" -eq 0 ] || die "Run with sudo or as root"
+  [ "$(uname -s)" = Linux ] || die "The purge script only supports Linux"
+  [ "$CONFIRMATION" = "$REQUIRED_CONFIRMATION" ] \
+    || die "Set KAIDI_PURGE_CONFIRM=$REQUIRED_CONFIRMATION to confirm local removal"
+  case "$BACKUP_ROOT" in
+    /*) ;;
+    *) die "KAIDI_PURGE_BACKUP_ROOT must be an absolute path" ;;
+  esac
+  case "$BACKUP_ROOT/" in
+    "$APP_ROOT/"*|"$BAOTA_ROOT/"*|"$CONFIG_ROOT/"*|"$STATE_ROOT/"*|\
+    "$UPDATE_STATE_ROOT/"*|"$LOG_ROOT/"*)
+      die "The recovery backup must be outside every managed Kaidi directory"
+      ;;
+  esac
+  [ ! -L "$BACKUP_ROOT" ] || die "The recovery backup root must not be a symbolic link"
+}
+
+stop_systemd_units() {
+  local unit
+  systemd_available || return 0
+  for unit in kaidi-update.path kaidi-update.service kaidi-finance.service; do
+    if systemctl cat "$unit" >/dev/null 2>&1; then
+      systemctl stop "$unit" >/dev/null 2>&1 \
+        || die "Failed to stop $unit"
+      systemctl disable "$unit" >/dev/null 2>&1 || true
+    fi
+  done
+}
+
+related_pids() {
+  local proc pid command_line
+  for proc in /proc/[0-9]*; do
+    [ -r "$proc/cmdline" ] || continue
+    pid=${proc##*/}
+    [ "$pid" != "$$" ] && [ "$pid" != "$PPID" ] || continue
+    command_line=$(tr '\000' ' ' < "$proc/cmdline" 2>/dev/null || true)
+    case "$command_line" in
+      *"$APP_ROOT/"*|*"$BAOTA_ROOT/"*) printf '%s\n' "$pid" ;;
+    esac
+  done
+}
+
+stop_managed_processes() {
+  local deadline
+  local -a pids=()
+  mapfile -t pids < <(related_pids)
+  if [ "${#pids[@]}" -gt 0 ]; then
+    log "Stopping remaining Kaidi processes: ${pids[*]}"
+    kill -TERM "${pids[@]}" 2>/dev/null || true
+  fi
+  deadline=$((SECONDS + 5))
+  while [ "$SECONDS" -lt "$deadline" ]; do
+    mapfile -t pids < <(related_pids)
+    [ "${#pids[@]}" -gt 0 ] || return 0
+    sleep 1
+  done
+  kill -KILL "${pids[@]}" 2>/dev/null || true
+  sleep 1
+  mapfile -t pids < <(related_pids)
+  [ "${#pids[@]}" -eq 0 ] \
+    || die "A process manager is restarting Kaidi; remove the Kaidi project from Baota and run this command again"
+}
+
+create_recovery_backup() {
+  local path relative temporary timestamp
+  local -a paths=()
+  for path in \
+    "$CONFIG_ROOT" \
+    "$STATE_ROOT" \
+    "$UPDATE_STATE_ROOT/backups" \
+    "$UPDATE_STATE_ROOT/failed" \
+    "$UPDATE_STATE_ROOT/transactions" \
+    "$FIRST_LOGIN_FILE"; do
+    if [ -e "$path" ] || [ -L "$path" ]; then
+      relative=${path#/}
+      paths+=("$relative")
+    fi
+  done
+  if [ "${#paths[@]}" -eq 0 ]; then
+    log "No local configuration or data needs a recovery backup"
+    return 0
+  fi
+  install -d -o root -g root -m 0700 "$BACKUP_ROOT"
+  timestamp=$(date -u +%Y%m%dT%H%M%SZ)
+  BACKUP_ARCHIVE="$BACKUP_ROOT/kaidi-local-state-$timestamp.tar.gz"
+  temporary="$BACKUP_ARCHIVE.next.$$"
+  log "Creating a root-only recovery backup at $BACKUP_ARCHIVE"
+  tar -czf "$temporary" -C / -- "${paths[@]}"
+  tar -tzf "$temporary" >/dev/null
+  chmod 0600 "$temporary"
+  mv -f "$temporary" "$BACKUP_ARCHIVE"
+}
+
+remove_systemd_units() {
+  local unit
+  rm -f \
+    /etc/systemd/system/kaidi-finance.service \
+    /etc/systemd/system/kaidi-update.service \
+    /etc/systemd/system/kaidi-update.path \
+    /etc/systemd/system/multi-user.target.wants/kaidi-finance.service \
+    /etc/systemd/system/multi-user.target.wants/kaidi-update.path
+  systemd_available || return 0
+  systemctl daemon-reload
+  for unit in kaidi-finance.service kaidi-update.service kaidi-update.path; do
+    systemctl reset-failed "$unit" >/dev/null 2>&1 || true
+  done
+}
+
+remove_managed_paths() {
+  rm -rf -- \
+    "$APP_ROOT" \
+    "$BAOTA_ROOT" \
+    "$CONFIG_ROOT" \
+    "$STATE_ROOT" \
+    "$UPDATE_STATE_ROOT" \
+    "$LOG_ROOT"
+  rm -f -- "$FIRST_LOGIN_FILE"
+}
+
+remove_download_archives() {
+  rm -f -- /tmp/kaidi-finance-*.tar.gz
+}
+
+remove_service_identity() {
+  local entry home shell group_entry gid members primary_users
+  entry=$(getent passwd "$SERVICE_USER" 2>/dev/null || true)
+  if [ -n "$entry" ]; then
+    home=$(printf '%s\n' "$entry" | awk -F: '{print $6}')
+    shell=$(printf '%s\n' "$entry" | awk -F: '{print $7}')
+    case "$home:$shell" in
+      "$STATE_ROOT:"*/nologin|"$STATE_ROOT:"*/false)
+        userdel "$SERVICE_USER" \
+          || die "Failed to remove the dedicated $SERVICE_USER service account"
+        ;;
+      *)
+        log "Keeping pre-existing user $SERVICE_USER because its home or shell is not Kaidi-managed"
+        ;;
+    esac
+  fi
+
+  group_entry=$(getent group "$SERVICE_GROUP" 2>/dev/null || true)
+  [ -n "$group_entry" ] || return 0
+  gid=$(printf '%s\n' "$group_entry" | awk -F: '{print $3}')
+  members=$(printf '%s\n' "$group_entry" | awk -F: '{print $4}')
+  primary_users=$(getent passwd | awk -F: -v gid="$gid" '$4 == gid { print $1 }')
+  if [ -z "$members" ] && [ -z "$primary_users" ]; then
+    groupdel "$SERVICE_GROUP" \
+      || die "Failed to remove the dedicated $SERVICE_GROUP service group"
+  else
+    log "Keeping group $SERVICE_GROUP because another account still uses it"
+  fi
+}
+
+main() {
+  validate_inputs
+  log "External MySQL data and reverse-proxy configuration will not be modified"
+  stop_systemd_units
+  stop_managed_processes
+  create_recovery_backup
+  remove_systemd_units
+  remove_managed_paths
+  remove_download_archives
+  remove_service_identity
+  stop_managed_processes
+  log "Local Kaidi installation state has been removed"
+  if [ -n "$BACKUP_ARCHIVE" ]; then
+    log "Recovery backup: $BACKUP_ARCHIVE"
+  fi
+  log "Use a new empty MySQL database for the next installation"
+}
+
+main "$@"

scripts/package-release.sh

@@ -143,8 +143,10 @@ else
 fi
 
 install -m 0755 "$ROOT/deploy/install.sh" "$OUTPUT_DIR/install.sh"
+install -m 0755 "$ROOT/deploy/purge.sh" "$OUTPUT_DIR/purge.sh"
 PUBLIC_KEY_SHA256=$(sha256_file "$OUTPUT_DIR/release-public.pem")
 INSTALLER_SHA256=$(sha256_file "$OUTPUT_DIR/install.sh")
+PURGER_SHA256=$(sha256_file "$OUTPUT_DIR/purge.sh")
 if [ -n "$TRUSTED_PUBLIC_KEY_SHA256" ]; then
   NORMALIZED_TRUSTED_PUBLIC_KEY_SHA256=$(printf '%s' "$TRUSTED_PUBLIC_KEY_SHA256" | tr '[:upper:]' '[:lower:]')
   [[ "$NORMALIZED_TRUSTED_PUBLIC_KEY_SHA256" =~ ^[0-9a-f]{64}$ ]] \
@@ -158,6 +160,7 @@ fi
 cat > "$OUTPUT_DIR/bootstrap-checksums.txt" <<EOF
 KAIDI_RELEASE_PUBLIC_KEY_SHA256=$PUBLIC_KEY_SHA256
 KAIDI_INSTALLER_SHA256=$INSTALLER_SHA256
+KAIDI_PURGER_SHA256=$PURGER_SHA256
 EOF
 BOOTSTRAP_SHA256=$(sha256_file "$OUTPUT_DIR/bootstrap-checksums.txt")
 
@@ -165,7 +168,8 @@ RELEASE_NOTES_VALUE=${KAIDI_RELEASE_NOTES:-"Kaidi Finance Preview $VERSION"}
 VERSION="$VERSION" ARTIFACT="$ARTIFACT" SHA256="$SHA256" RELEASE_NOTES="$RELEASE_NOTES_VALUE" \
   BACKEND_SBOM_SHA256="$BACKEND_SBOM_SHA256" FRONTEND_SBOM_SHA256="$FRONTEND_SBOM_SHA256" \
   BACKEND_BUILD_VERSION="$BACKEND_BUILD_VERSION" FRONTEND_BUILD_VERSION="$FRONTEND_BUILD_VERSION" \
-  INSTALLER_SHA256="$INSTALLER_SHA256" PUBLIC_KEY_SHA256="$PUBLIC_KEY_SHA256" \
+  INSTALLER_SHA256="$INSTALLER_SHA256" PURGER_SHA256="$PURGER_SHA256" \
+  PUBLIC_KEY_SHA256="$PUBLIC_KEY_SHA256" \
   BOOTSTRAP_SHA256="$BOOTSTRAP_SHA256" SOURCE_REVISION="$SOURCE_REVISION" SOURCE_REF="$SOURCE_REF" \
   SOURCE_DIRTY="$SOURCE_DIRTY" \
   node <<'NODE' > "$OUTPUT_DIR/release-manifest.json"
@@ -192,6 +196,8 @@ const manifest = {
   bootstrap: {
     installer: 'install.sh',
     installerSha256: process.env.INSTALLER_SHA256,
+    purger: 'purge.sh',
+    purgerSha256: process.env.PURGER_SHA256,
     publicKey: 'release-public.pem',
     publicKeySha256: process.env.PUBLIC_KEY_SHA256,
     checksums: 'bootstrap-checksums.txt',
@@ -211,14 +217,15 @@ fi
   cd "$OUTPUT_DIR"
   if command -v sha256sum >/dev/null 2>&1; then
     sha256sum "$ARTIFACT" backend-sbom.cdx.json frontend-sbom.cdx.json \
-      release-manifest.json release-manifest.sig release-public.pem install.sh \
+      release-manifest.json release-manifest.sig release-public.pem install.sh purge.sh \
       bootstrap-checksums.txt > SHA256SUMS
   else
     shasum -a 256 "$ARTIFACT" backend-sbom.cdx.json frontend-sbom.cdx.json \
-      release-manifest.json release-manifest.sig release-public.pem install.sh \
+      release-manifest.json release-manifest.sig release-public.pem install.sh purge.sh \
       bootstrap-checksums.txt > SHA256SUMS
   fi
 )
 printf 'Release assets created in %s\n' "$OUTPUT_DIR"
 printf 'Trusted release public-key SHA-256: %s\n' "$PUBLIC_KEY_SHA256"
 printf 'Installer SHA-256: %s\n' "$INSTALLER_SHA256"
+printf 'Purger SHA-256: %s\n' "$PURGER_SHA256"

scripts/publish-gitea-release.sh

@@ -87,6 +87,7 @@ ASSETS=(
   release-manifest.sig
   release-public.pem
   install.sh
+  purge.sh
   bootstrap-checksums.txt
   SHA256SUMS
 )
@@ -124,7 +125,7 @@ jq -n \
   > "$WORK/publish.json"
 publish_status=$(request PATCH "$API/releases/$RELEASE_ID" "$WORK/published.json" "$WORK/publish.json")
 [ "$publish_status" = 200 ] || fail "release publication returned HTTP $publish_status"
-jq -e '.draft == false and .prerelease == false and (.assets | length) == 9' \
+jq -e '.draft == false and .prerelease == false and (.assets | length) == 10' \
   "$WORK/published.json" >/dev/null || fail 'published release state is invalid'
 
-printf 'Published Gitea release %s with nine verified assets\n' "$TAG"
+printf 'Published Gitea release %s with ten verified assets\n' "$TAG"

scripts/test-baota-start-fixture.sh

@@ -14,7 +14,7 @@ RELEASE="$WORK/release"
 mkdir -p "$RELEASE/ops" "$RELEASE/public" "$WORK/files" "$WORK/tmp"
 printf 'fixture jar\n' > "$RELEASE/app.jar"
 printf '<!doctype html>\n' > "$RELEASE/public/index.html"
-printf '1.0.0-preview.23\n' > "$RELEASE/VERSION"
+printf '1.0.0-preview.24\n' > "$RELEASE/VERSION"
 cp "$ROOT/deploy/baota-start.sh" "$RELEASE/ops/baota-start.sh"
 chmod 0755 "$RELEASE/ops/baota-start.sh"
 
@@ -46,7 +46,7 @@ FILE_STORAGE_TEMP="$WORK/tmp" \
 grep -Fqx "cwd=$RELEASE" "$WORK/java.log" || fail 'launcher did not use the release working directory'
 grep -Fqx "args=-XX:MaxRAMPercentage=70 -Dfile.encoding=UTF-8 -jar $RELEASE/app.jar" "$WORK/java.log" \
   || fail 'launcher did not execute the packaged Spring Boot jar'
-grep -Fqx 'version=1.0.0-preview.23' "$WORK/java.log" || fail 'launcher did not read VERSION'
+grep -Fqx 'version=1.0.0-preview.24' "$WORK/java.log" || fail 'launcher did not read VERSION'
 grep -Fqx 'address=127.0.0.1' "$WORK/java.log" || fail 'launcher did not default to loopback'
 grep -Fqx 'port=18080' "$WORK/java.log" || fail 'launcher did not default to port 18080'
 grep -Fqx 'update=false' "$WORK/java.log" || fail 'launcher did not disable the systemd updater'

scripts/test-gitea-publish-fixture.sh

@@ -24,6 +24,7 @@ for name in \
   release-manifest.sig \
   release-public.pem \
   install.sh \
+  purge.sh \
   bootstrap-checksums.txt \
   SHA256SUMS; do
   printf 'fixture asset %s\n' "$name" > "$RELEASE_DIR/$name"
@@ -102,11 +103,11 @@ GITEA_TOKEN="$TOKEN" \
 KAIDI_RELEASE_DIR="$RELEASE_DIR" \
   "$ROOT/scripts/publish-gitea-release.sh" > "$WORK/publish.log"
 
-grep -Fqx "Published Gitea release $TAG with nine verified assets" "$WORK/publish.log" \
+grep -Fqx "Published Gitea release $TAG with ten verified assets" "$WORK/publish.log" \
   || fail 'publish script did not report success'
-[ "$(wc -l < "$WORK/assets.jsonl" | tr -d '[:space:]')" -eq 9 ] \
+[ "$(wc -l < "$WORK/assets.jsonl" | tr -d '[:space:]')" -eq 10 ] \
-  || fail 'publish script did not upload exactly nine assets'
+  || fail 'publish script did not upload exactly ten assets'
 ! grep -Fq "$TOKEN" "$WORK/curl.log" \
   || fail 'Gitea write token leaked into curl process arguments'
 
-printf 'Gitea draft, nine-asset verification, and publication fixture passed\n'
+printf 'Gitea draft, ten-asset verification, and publication fixture passed\n'

scripts/test-purge-fixture.sh

@@ -0,0 +1,87 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+ROOT=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
+WORK=$(mktemp -d)
+trap 'rm -rf "$WORK"' EXIT
+
+fail() {
+  printf 'Purge fixture failed: %s\n' "$1" >&2
+  exit 1
+}
+
+sed '$d' "$ROOT/deploy/purge.sh" > "$WORK/purge-functions.sh"
+# shellcheck disable=SC1090,SC1091
+source "$WORK/purge-functions.sh"
+
+install() {
+  local -a arguments=()
+  while [ "$#" -gt 0 ]; do
+    case "$1" in
+      -o|-g) shift 2 ;;
+      *) arguments+=("$1"); shift ;;
+    esac
+  done
+  command install "${arguments[@]}"
+}
+
+APP_ROOT="$WORK/opt/kaidi"
+BAOTA_ROOT="$WORK/www/kaidi"
+CONFIG_ROOT="$WORK/etc/kaidi"
+STATE_ROOT="$WORK/var/lib/kaidi"
+UPDATE_STATE_ROOT="$WORK/var/lib/kaidi-update"
+LOG_ROOT="$WORK/var/log/kaidi"
+FIRST_LOGIN_FILE="$WORK/root/kaidi-first-login.txt"
+# shellcheck disable=SC2034 # Referenced by the sourced purge helper.
+BACKUP_ROOT="$WORK/recovery"
+BACKUP_ARCHIVE=
+
+mkdir -p \
+  "$APP_ROOT" \
+  "$BAOTA_ROOT" \
+  "$CONFIG_ROOT" \
+  "$STATE_ROOT/files" \
+  "$UPDATE_STATE_ROOT/backups" \
+  "$UPDATE_STATE_ROOT/failed" \
+  "$UPDATE_STATE_ROOT/transactions" \
+  "$LOG_ROOT" \
+  "$(dirname "$FIRST_LOGIN_FILE")" \
+  "$WORK/external-mysql" \
+  "$WORK/reverse-proxy"
+printf 'DB_PASSWORD="secret"\n' > "$CONFIG_ROOT/kaidi.env"
+printf 'document\n' > "$STATE_ROOT/files/document.txt"
+printf 'dump\n' > "$UPDATE_STATE_ROOT/backups/mysql.sql"
+printf 'setup code\n' > "$FIRST_LOGIN_FILE"
+printf 'database sentinel\n' > "$WORK/external-mysql/keep"
+printf 'proxy sentinel\n' > "$WORK/reverse-proxy/keep"
+
+create_recovery_backup
+[ -s "$BACKUP_ARCHIVE" ] || fail 'root-only recovery archive was not created'
+[ "$(stat -c '%a' "$BACKUP_ARCHIVE" 2>/dev/null || stat -f '%Lp' "$BACKUP_ARCHIVE")" = 600 ] \
+  || fail 'recovery archive mode is not 0600'
+archive_list=$(tar -tzf "$BACKUP_ARCHIVE")
+grep -Fq "${CONFIG_ROOT#/}/kaidi.env" <<< "$archive_list" \
+  || fail 'configuration was omitted from the recovery archive'
+grep -Fq "${STATE_ROOT#/}/files/document.txt" <<< "$archive_list" \
+  || fail 'file storage was omitted from the recovery archive'
+grep -Fq "${UPDATE_STATE_ROOT#/}/backups/mysql.sql" <<< "$archive_list" \
+  || fail 'database backup was omitted from the recovery archive'
+
+remove_managed_paths
+for path in "$APP_ROOT" "$BAOTA_ROOT" "$CONFIG_ROOT" "$STATE_ROOT" "$UPDATE_STATE_ROOT" "$LOG_ROOT"; do
+  [ ! -e "$path" ] || fail "managed path was not removed: $path"
+done
+[ ! -e "$FIRST_LOGIN_FILE" ] || fail 'first-login file was not removed'
+[ -f "$WORK/external-mysql/keep" ] || fail 'external database state was removed'
+[ -f "$WORK/reverse-proxy/keep" ] || fail 'reverse-proxy state was removed'
+[ -s "$BACKUP_ARCHIVE" ] || fail 'recovery archive was removed with the installation'
+
+[ "$(tail -n 1 "$ROOT/deploy/purge.sh")" = 'main "$@"' ] \
+  || fail 'purge actions can execute before a complete curl stream is parsed'
+# shellcheck disable=SC2016 # Match the literal guard in the purge source.
+grep -Fq 'KAIDI_PURGE_CONFIRM=$REQUIRED_CONFIRMATION' "$ROOT/deploy/purge.sh" \
+  || fail 'destructive removal no longer requires explicit confirmation'
+grep -Fq 'External MySQL data and reverse-proxy configuration will not be modified' "$ROOT/deploy/purge.sh" \
+  || fail 'purge boundary is no longer explicit'
+
+printf 'Local purge and recovery fixture passed\n'

scripts/verify-release.sh

@@ -40,6 +40,7 @@ printf '%s\n' \
   bootstrap-checksums.txt \
   frontend-sbom.cdx.json \
   install.sh \
+  purge.sh \
   "$ARTIFACT" \
   release-manifest.json \
   release-manifest.sig \
@@ -49,7 +50,7 @@ for path in ./* ./.[!.]* ./..?*; do
   basename "$path"
 done | LC_ALL=C sort > "$WORK/actual-assets.txt"
 diff -u "$WORK/expected-assets.txt" "$WORK/actual-assets.txt" \
-  || { printf 'Release directory must contain exactly the nine published assets\n' >&2; exit 1; }
+  || { printf 'Release directory must contain exactly the ten published assets\n' >&2; exit 1; }
 EXPECTED_ARTIFACT_SHA256=$(jq -er \
   '.sha256 | strings | ascii_downcase | select(test("^[0-9a-f]{64}$"))' \
   release-manifest.json)
@@ -109,16 +110,21 @@ done
 
 PUBLIC_KEY_SHA256=$(sha256_file release-public.pem)
 INSTALLER_SHA256=$(sha256_file install.sh)
+PURGER_SHA256=$(sha256_file purge.sh)
 BOOTSTRAP_SHA256=$(sha256_file bootstrap-checksums.txt)
 SIGNED_INSTALLER=$(jq -er '.bootstrap.installer' release-manifest.json)
+SIGNED_PURGER=$(jq -er '.bootstrap.purger' release-manifest.json)
 SIGNED_PUBLIC_KEY=$(jq -er '.bootstrap.publicKey' release-manifest.json)
 SIGNED_BOOTSTRAP=$(jq -er '.bootstrap.checksums' release-manifest.json)
-[ "$SIGNED_INSTALLER" = install.sh ] && [ "$SIGNED_PUBLIC_KEY" = release-public.pem ] \
+[ "$SIGNED_INSTALLER" = install.sh ] && [ "$SIGNED_PURGER" = purge.sh ] \
+  && [ "$SIGNED_PUBLIC_KEY" = release-public.pem ] \
   && [ "$SIGNED_BOOTSTRAP" = bootstrap-checksums.txt ] \
   || { printf 'Release manifest bootstrap asset names are invalid\n' >&2; exit 1; }
-jq -e --arg installer "$INSTALLER_SHA256" --arg publicKey "$PUBLIC_KEY_SHA256" \
+jq -e --arg installer "$INSTALLER_SHA256" --arg purger "$PURGER_SHA256" \
+  --arg publicKey "$PUBLIC_KEY_SHA256" \
   --arg bootstrap "$BOOTSTRAP_SHA256" \
   '.bootstrap.installerSha256 == $installer
+    and .bootstrap.purgerSha256 == $purger
     and .bootstrap.publicKeySha256 == $publicKey
     and .bootstrap.checksumsSha256 == $bootstrap' release-manifest.json >/dev/null \
   || { printf 'Bootstrap assets do not match the signed manifest\n' >&2; exit 1; }
@@ -131,6 +137,8 @@ NORMALIZED_TRUSTED_PUBLIC_KEY_SHA256=$(printf '%s' "$TRUSTED_PUBLIC_KEY_SHA256"
   || { printf 'Bootstrap public-key fingerprint does not match\n' >&2; exit 1; }
 [ "$(sed -n 's/^KAIDI_INSTALLER_SHA256=//p' bootstrap-checksums.txt)" = "$INSTALLER_SHA256" ] \
   || { printf 'Bootstrap installer digest does not match\n' >&2; exit 1; }
+[ "$(sed -n 's/^KAIDI_PURGER_SHA256=//p' bootstrap-checksums.txt)" = "$PURGER_SHA256" ] \
+  || { printf 'Bootstrap purger digest does not match\n' >&2; exit 1; }
 
 ARCHIVE_LIST=$(tar -tzf "$ARTIFACT")
 if grep -Eq '(^/|(^|/)\.\.(/|$))' <<< "$ARCHIVE_LIST"; then
@@ -171,5 +179,8 @@ tar -tvzf "$ARTIFACT" ./ops/baota-start.sh | grep -Eq '^-.{2}x.{2}x.{2}x' \
 bash -n "$ROOT/deploy/baota-start.sh"
 cmp install.sh "$ROOT/deploy/install.sh" \
   || { printf 'Release installer does not match deploy/install.sh\n' >&2; exit 1; }
+bash -n "$ROOT/deploy/purge.sh"
+cmp purge.sh "$ROOT/deploy/purge.sh" \
+  || { printf 'Release purger does not match deploy/purge.sh\n' >&2; exit 1; }
 
 printf 'Release %s verified; installer SHA-256: %s\n' "$VERSION" "$INSTALLER_SHA256"