Rewrite durable task lifecycle, gallery indexing and subscription publication
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#!/usr/bin/env bash
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# 图片索引（cache.db）迁移：为缓存表补唯一约束与查询索引。
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#
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# 设计约束：
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# * 默认 dry-run，只读检查；必须显式 --apply 才执行写入。
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# * 必须显式 --db 指定数据库文件，不读取任何运行时配置，也不推断生产路径。
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# * 写库用 sqlite3 -cmd '.bail on'，任一语句出错立即以非零码退出，事务不提交。
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# * 只以读写模式打开目标库（文件必须已存在，不会新建）；dry-run 全用 -readonly。
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# * 备份用 SQLite 自身的 .backup（online backup API），而不是 cp：
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# cp 会漏掉 WAL 里尚未 checkpoint 的已提交内容。
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# * 备份后立即校验备份可读且含两张缓存表，失败则中止并删除无效备份。
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# * 不健康（不完整/冲突）的 gid 整组索引会被删除，由下一次在线阅读重新抓取。
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# * 唯一约束建在唯一索引上：若清理后仍有重复，建索引会失败并整体回滚。
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#
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# 用法：
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# scripts/migrate_image_index_cache.sh --db /tmp/cache-copy.db # dry-run（只读）
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# scripts/migrate_image_index_cache.sh --db /tmp/cache-copy.db --apply # 执行迁移
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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SQL_FILE="$SCRIPT_DIR/migrate_image_index_cache.sql"
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db_path=""
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apply="no"
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usage() {
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sed -n '2,30p' "${BASH_SOURCE[0]}" | sed 's/^# \{0,1\}//'
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}
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--db) db_path="${2:-}"; shift 2 ;;
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--apply) apply="yes"; shift ;;
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-h|--help) usage; exit 0 ;;
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*)
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echo "未知参数: $1" >&2
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exit 2 ;;
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esac
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done
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if [[ -z "$db_path" ]]; then
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echo "必须显式指定缓存库: --db <cache.db>；本脚本不会自动推断数据库位置。" >&2
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exit 2
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fi
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if [[ ! -f "$db_path" ]]; then
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echo "数据库不存在: $db_path" >&2
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exit 2
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fi
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if [[ ! -f "$SQL_FILE" ]]; then
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echo "缺少 SQL: $SQL_FILE" >&2
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exit 2
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fi
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if ! command -v sqlite3 >/dev/null 2>&1; then
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echo "缺少 sqlite3 命令行工具" >&2
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exit 2
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fi
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if [[ "$(sqlite3 -readonly "$db_path" \
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"select count(*) from sqlite_master where type='table' and name in ('gidToKey','ImageKeyCache');")" != "2" ]]; then
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echo "缓存表缺失：$db_path 中找不到 gidToKey 与 ImageKeyCache。" >&2
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exit 2
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fi
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# 体检统计，与 SQL 里实际清理的范围一致：
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# bad_gids 将被整组删除的 gid 个数（去重），覆盖：
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# 重复头部 / 行数不符 / 页码去重后不足 / 页码区间异常 /
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# 空 imgkey / 空 key / 非法 pages
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# bad_gid_rows 这些 gid 占用的头部行数（重复头部的 gid 会多于 1 行）
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# duplicate_pages 重复的 (gid,page) 组数，仅用于展示，会随所属 gid 一并清理
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# orphan_gids 有页 key 但无头部记录的 gid 个数
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read_stats() {
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sqlite3 -readonly "$db_path" "
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select 'header_rows', count(*) from gidToKey;
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select 'page_rows', count(*) from ImageKeyCache;
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select 'duplicate_gids', count(*) from (select gid from gidToKey group by gid having count(*) > 1);
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select 'duplicate_pages', count(*) from (select gid,page from ImageKeyCache group by gid,page having count(*) > 1);
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select 'bad_gids', count(distinct g.gid) from gidToKey g
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where g.pages is null or g.pages <= 0
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or g.key is null or trim(g.key) = ''
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or (select count(*) from ImageKeyCache i where i.gid = g.gid) <> g.pages
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or (select count(distinct i.page) from ImageKeyCache i where i.gid = g.gid) <> g.pages
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or (select min(i.page) from ImageKeyCache i where i.gid = g.gid) <> 1
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or (select max(i.page) from ImageKeyCache i where i.gid = g.gid) <> g.pages
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or exists (select 1 from ImageKeyCache i
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where i.gid = g.gid and (i.imgkey is null or trim(i.imgkey) = ''));
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select 'bad_gid_rows', coalesce(sum(c), 0) from (
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select count(*) as c from gidToKey g where g.gid in (
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select g2.gid from gidToKey g2 where g2.pages is null or g2.pages <= 0
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or g2.key is null or trim(g2.key) = ''
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or (select count(*) from ImageKeyCache i where i.gid = g2.gid) <> g2.pages
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or (select count(distinct i.page) from ImageKeyCache i where i.gid = g2.gid) <> g2.pages
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or (select min(i.page) from ImageKeyCache i where i.gid = g2.gid) <> 1
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or (select max(i.page) from ImageKeyCache i where i.gid = g2.gid) <> g2.pages
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or exists (select 1 from ImageKeyCache i
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where i.gid = g2.gid and (i.imgkey is null or trim(i.imgkey) = '')))
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group by g.gid);
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select 'orphan_gids', count(distinct gid) from ImageKeyCache
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where gid not in (select gid from gidToKey);
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select 'strict_index', count(*) from sqlite_master
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where type='index' and name='ux_ImageKeyCache_gid_page';
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"
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}
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mode_label="dry-run（只读）"
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if [[ "$apply" == "yes" ]]; then mode_label="apply（读写）"; fi
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echo "=== 缓存库图片索引迁移（$mode_label） ==="
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echo "数据库: $db_path"
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echo "--- 迁移前体检 ---"
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read_stats | while IFS='|' read -r name value; do
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printf ' %-16s %s\n' "$name" "$value"
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done
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if [[ "$apply" != "yes" ]]; then
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echo
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echo "dry-run：未做任何写入。确认无误后加 --apply 执行迁移。"
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echo "提示：请先在 SQLite 副本上演练，副本应这样生成（含 WAL 内容）："
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echo " sqlite3 -readonly <生产库> \".backup '<副本路径>'\""
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exit 0
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fi
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# ---- 备份：SQLite online backup，包含 WAL 中已提交但未 checkpoint 的内容 ----
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backup="$db_path.before-image-index.$(date -u +%Y%m%dT%H%M%SZ)"
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if ! sqlite3 "$db_path" ".backup '$backup'"; then
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echo "备份失败，未做任何修改: $backup" >&2
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exit 3
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fi
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if [[ ! -s "$backup" ]]; then
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echo "备份文件为空，未做任何修改: $backup" >&2
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exit 3
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fi
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if [[ "$(sqlite3 -readonly "$backup" \
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"select count(*) from sqlite_master where type='table' and name in ('gidToKey','ImageKeyCache');")" != "2" ]]; then
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echo "备份校验失败（缺少缓存表），未做任何修改，已删除无效备份。" >&2
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rm -f -- "$backup"
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exit 3
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fi
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echo "已备份（SQLite .backup）: $backup"
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# ---- 执行迁移：.bail on 保证任一语句失败即退出，事务不提交 ----
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sqlite3 -cmd '.bail on' "$db_path" < "$SQL_FILE"
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echo "--- 迁移后体检 ---"
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read_stats | while IFS='|' read -r name value; do
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printf ' %-16s %s\n' "$name" "$value"
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done
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echo "图片索引迁移完成: $db_path"
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@@ -0,0 +1,67 @@
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-- 图片索引缓存迁移：为 cache.db 的两张索引表补唯一约束与查询索引。
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--
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-- 目标（对应本次重写的三条不变量）：
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-- 1. gid 唯一 —— 同一本画廊只能有一条 gidToKey 记录；
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-- 2. (gid,page) 唯一 —— 同一页只能有一个 imgkey，同时天然满足按页查询的索引需求；
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-- 3. 只保留「完整」的索引 —— 半截或冲突的 gid 整组删除，让下一次在线阅读重新抓取。
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--
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-- 为什么用唯一索引而不是重建表：
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-- * 唯一索引对 SQLite 与唯一约束等价，都会拒绝重复写入；
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-- * 不需要搬表、改列，旧版本二进制仍可读写同一份数据；
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-- * 回滚只需 drop index，最坏情况也只需回到脚本自动生成的备份文件。
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--
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-- 幂等：所有重建索引都带 IF NOT EXISTS；清理语句只按集合删除，重复执行结果相同。
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-- 安全：本脚本只做 DELETE 与 CREATE INDEX，不建表、不改列、不碰 gidToKey/ImageKeyCache
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-- 之外的任何对象。必须在事务中整体提交，调用方使用 sqlite3 -bail 保证任一语句
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-- 失败即终止、事务回滚。
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--
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-- 执行前请务必先备份数据库文件（迁移脚本 migrate_image_index_cache.sh --apply 会自动备份）。
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BEGIN IMMEDIATE;
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-- ---------- 1. 冲突 gid：同一 gid 有多条头部记录 ----------
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-- 无法判断哪一条正确，整组移除，由下次访问重抓。
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CREATE TEMP TABLE __conflict_gid AS
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SELECT gid FROM gidToKey GROUP BY gid HAVING COUNT(*) > 1;
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DELETE FROM ImageKeyCache WHERE gid IN (SELECT gid FROM __conflict_gid);
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DELETE FROM gidToKey WHERE gid IN (SELECT gid FROM __conflict_gid);
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-- ---------- 2. 半截或非法 gid：头部与页 key 不一致 ----------
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-- 判定同时覆盖：页码数量不符、页码不连续（跳号/重复）、区间不是 1..pages、
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-- 头部字段为空、以及存在空的 imgkey 行。
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CREATE TEMP TABLE __broken_gid AS
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SELECT g.gid
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FROM gidToKey g
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WHERE g.pages IS NULL OR g.pages <= 0
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OR g.key IS NULL OR trim(g.key) = ''
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OR (SELECT COUNT(*) FROM ImageKeyCache i WHERE i.gid = g.gid) <> g.pages
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OR (SELECT COUNT(DISTINCT i.page) FROM ImageKeyCache i WHERE i.gid = g.gid) <> g.pages
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OR (SELECT MIN(i.page) FROM ImageKeyCache i WHERE i.gid = g.gid) <> 1
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OR (SELECT MAX(i.page) FROM ImageKeyCache i WHERE i.gid = g.gid) <> g.pages
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OR EXISTS (SELECT 1 FROM ImageKeyCache i
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WHERE i.gid = g.gid AND (i.imgkey IS NULL OR trim(i.imgkey) = ''));
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DELETE FROM ImageKeyCache WHERE gid IN (SELECT gid FROM __broken_gid);
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DELETE FROM gidToKey WHERE gid IN (SELECT gid FROM __broken_gid);
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-- ---------- 3. 孤儿页 key：没有对应头部记录 ----------
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DELETE FROM ImageKeyCache WHERE gid NOT IN (SELECT gid FROM gidToKey);
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-- ---------- 4. 唯一约束 ----------
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-- 到这里若仍有重复，说明上面的判定有遗漏；CREATE UNIQUE INDEX 会失败，
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-- 配合 -bail 让整个事务回滚，不会留下「一半约束」的库。
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CREATE UNIQUE INDEX IF NOT EXISTS ux_gidToKey_gid
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ON gidToKey (gid);
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CREATE UNIQUE INDEX IF NOT EXISTS ux_ImageKeyCache_gid_page
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ON ImageKeyCache (gid, page);
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-- 按 gid 统计页数会用到 (gid,page) 前缀，按页取 key 也走同一索引，
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-- 因此不再单独建 page 索引，避免重复占用写放大。
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DROP TABLE __conflict_gid;
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DROP TABLE __broken_gid;
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COMMIT;
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@@ -0,0 +1,31 @@
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-- 任务操作记录表（协议 v2：先持久化意图，再产生外部副作用）
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--
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-- 这是显式迁移脚本，不会被应用自动执行，也不对生产库运行。
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-- 执行前请备份：sqlite3 LionWebsite.db ".backup LionWebsite.db.before-task-operation"
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--
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-- 幂等：可重复执行。
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create table if not exists task_operation
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(
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gid integer not null
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constraint task_operation_pk
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primary key,
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operationId varchar(64),
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deleteOperationId varchar(64),
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state varchar(20) not null,
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lastRevision integer not null default 0,
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lastReportId varchar(64),
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updateTime long not null default 0
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);
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-- 节点上报消费只按 gid 命中主键，这里额外为「按状态找待处理意图」提供查询入口。
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create index if not exists idx_task_operation_state on task_operation (state);
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-- gallery.gid 目前只有 table 级主键约束（部分历史库甚至是自增主键的衍生约束），
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-- 这里显式建立唯一索引，保证同一 gid 不会出现两条任务行：
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-- 「同一 gid 只有一个有效意图」是 v2 生命周期成立的前提。
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-- 若该语句因历史重复数据失败，请先人工确认重复行来源再处理，不要直接删除。
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create unique index if not exists idx_gallery_gid_unique on gallery (gid);
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-- 旧任务行没有操作记录：启动/查询时按 gid 惰性补建为 SUBMITTED（已在上游提交过），
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-- 不需要在迁移里批量写入，避免把正在进行的任务判成 UNKNOWN。
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@@ -0,0 +1,44 @@
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#!/usr/bin/env python3
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"""Explicit task-v2 schema migration. Default is read-only; --apply backs up first."""
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import argparse
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import datetime
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import json
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from pathlib import Path
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import sqlite3
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def migrate(database: Path, apply: bool = False) -> dict:
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if not database.is_file():
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raise ValueError("database must already exist")
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with sqlite3.connect(database.resolve().as_uri() + ("?mode=rw" if apply else "?mode=ro"), uri=True) as db:
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if not db.execute("pragma table_info(gallery)").fetchall():
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raise ValueError("required table missing: gallery")
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duplicates = db.execute("select count(*) from (select gid from gallery group by gid having count(*)>1)").fetchone()[0]
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if duplicates:
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raise ValueError("duplicate gallery gid; reconcile before migration")
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present = bool(db.execute("pragma table_info(task_operation)").fetchall())
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result = {"apply": apply, "create_operation_table": not present}
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if not apply:
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return result
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stamp = datetime.datetime.now(datetime.timezone.utc).strftime("%Y%m%dT%H%M%S%fZ")
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backup = database.with_name(database.name + ".before-task-v2." + stamp)
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with sqlite3.connect(backup) as copy:
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db.backup(copy)
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backup.chmod(0o600)
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sql = Path(__file__).with_name("migrate_task_operation_v2.sql").read_text()
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try:
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db.executescript("BEGIN IMMEDIATE;\n" + sql + "\nCOMMIT;")
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except BaseException:
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db.rollback()
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raise
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result["backup"] = str(backup)
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result["operation_rows"] = db.execute("select count(*) from task_operation").fetchone()[0]
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return result
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(description=__doc__)
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parser.add_argument("database", type=Path)
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parser.add_argument("--apply", action="store_true")
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arguments = parser.parse_args()
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print(json.dumps(migrate(arguments.database, arguments.apply), ensure_ascii=False))
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@@ -0,0 +1,64 @@
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#!/usr/bin/env python3
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"""Add stable user identity to subscription bindings and access records.
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The default invocation only reports schema changes. --apply creates a consistent
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SQLite backup before the transaction. Run against an isolated database first.
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"""
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import argparse
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import datetime
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import json
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from pathlib import Path
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import sqlite3
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def migrate(db_path: Path, apply: bool = False) -> dict:
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if not db_path.is_file():
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raise ValueError("database must already exist")
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uri = db_path.resolve().as_uri() + ("?mode=rw" if apply else "?mode=ro")
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with sqlite3.connect(uri, uri=True) as db:
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changes = []
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for table in ("sub_bind", "sub_update_record"):
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columns = {row[1] for row in db.execute(f'PRAGMA table_info("{table}")')}
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if not columns:
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raise ValueError(f"required table missing: {table}")
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if "user_id" not in columns:
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changes.append(f"add {table}.user_id")
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duplicates = db.execute(
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"select count(*) from (select username from User group by username having count(*) > 1)"
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).fetchone()[0]
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if duplicates:
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raise ValueError("ambiguous duplicate usernames; resolve identities before migration")
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result = {"apply": apply, "schema_changes": changes}
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if not apply:
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return result
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stamp = datetime.datetime.now(datetime.timezone.utc).strftime("%Y%m%dT%H%M%S%fZ")
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backup = db_path.with_name(db_path.name + ".before-user-links." + stamp)
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with sqlite3.connect(backup) as snapshot:
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db.backup(snapshot)
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backup.chmod(0o600)
|
||||
db.execute("BEGIN IMMEDIATE")
|
||||
try:
|
||||
for change in changes:
|
||||
table = change.split()[1].split(".")[0]
|
||||
db.execute(f'ALTER TABLE "{table}" ADD COLUMN user_id INTEGER REFERENCES User(id)')
|
||||
for table in ("sub_bind", "sub_update_record"):
|
||||
db.execute(f'UPDATE "{table}" SET user_id=(SELECT id FROM User WHERE username="{table}".user) WHERE user_id IS NULL')
|
||||
db.execute("CREATE UNIQUE INDEX IF NOT EXISTS User_username_uindex ON User(username)")
|
||||
db.execute("CREATE UNIQUE INDEX IF NOT EXISTS idx_sub_bind_user_id ON sub_bind(user_id) WHERE user_id IS NOT NULL")
|
||||
db.execute("CREATE INDEX IF NOT EXISTS idx_sub_record_user_id ON sub_update_record(user_id, id)")
|
||||
db.commit()
|
||||
except BaseException:
|
||||
db.rollback()
|
||||
raise
|
||||
result["backup"] = str(backup)
|
||||
result["unresolved_bindings"] = db.execute("select count(*) from sub_bind where user_id is null").fetchone()[0]
|
||||
result["unresolved_records"] = db.execute("select count(*) from sub_update_record where user_id is null").fetchone()[0]
|
||||
return result
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
parser = argparse.ArgumentParser(description=__doc__)
|
||||
parser.add_argument("database", type=Path)
|
||||
parser.add_argument("--apply", action="store_true")
|
||||
args = parser.parse_args()
|
||||
print(json.dumps(migrate(args.database, args.apply), ensure_ascii=False))
|
||||
@@ -0,0 +1,55 @@
|
||||
import importlib.util
|
||||
from pathlib import Path
|
||||
import sqlite3
|
||||
import tempfile
|
||||
import unittest
|
||||
|
||||
spec = importlib.util.spec_from_file_location("migration", Path(__file__).with_name("migrate_user_links.py"))
|
||||
migration = importlib.util.module_from_spec(spec)
|
||||
spec.loader.exec_module(migration)
|
||||
|
||||
|
||||
class MigrationTest(unittest.TestCase):
|
||||
def test_dry_run_idempotent_migration_and_rename(self):
|
||||
with tempfile.TemporaryDirectory() as temporary:
|
||||
path = Path(temporary) / "test.db"
|
||||
with sqlite3.connect(path) as db:
|
||||
db.executescript("""
|
||||
CREATE TABLE User(id INTEGER PRIMARY KEY, username TEXT);
|
||||
CREATE TABLE sub_bind(key TEXT PRIMARY KEY, user TEXT, subscription_account_id INTEGER);
|
||||
CREATE TABLE sub_update_record(id INTEGER PRIMARY KEY, user TEXT, location TEXT);
|
||||
INSERT INTO User VALUES(1,'old-name');
|
||||
INSERT INTO sub_bind VALUES('example-key','old-name',2);
|
||||
INSERT INTO sub_update_record VALUES(10,'old-name','unknown');
|
||||
INSERT INTO sub_update_record VALUES(11,'old-name','unknown');
|
||||
""")
|
||||
before = path.read_bytes()
|
||||
self.assertEqual(2, len(migration.migrate(path)["schema_changes"]))
|
||||
self.assertEqual(before, path.read_bytes())
|
||||
self.assertEqual(0, migration.migrate(path, True)["unresolved_bindings"])
|
||||
self.assertEqual([], migration.migrate(path, True)["schema_changes"])
|
||||
with sqlite3.connect(path) as db:
|
||||
db.execute("update User set username='new-name' where id=1")
|
||||
self.assertEqual((1,), db.execute("select user_id from sub_bind").fetchone())
|
||||
# A slow first lookup must not overwrite the second request's row.
|
||||
db.execute("update sub_update_record set location='first-location' where id=10")
|
||||
self.assertEqual(("unknown",), db.execute("select location from sub_update_record where id=11").fetchone())
|
||||
|
||||
def test_ambiguous_names_fail_without_modifying_database(self):
|
||||
with tempfile.TemporaryDirectory() as temporary:
|
||||
path = Path(temporary) / "test.db"
|
||||
with sqlite3.connect(path) as db:
|
||||
db.executescript("""
|
||||
CREATE TABLE User(id INTEGER PRIMARY KEY, username TEXT);
|
||||
CREATE TABLE sub_bind(user TEXT);
|
||||
CREATE TABLE sub_update_record(user TEXT);
|
||||
INSERT INTO User VALUES(1,'same'),(2,'same');
|
||||
""")
|
||||
before = path.read_bytes()
|
||||
with self.assertRaises(ValueError):
|
||||
migration.migrate(path, True)
|
||||
self.assertEqual(before, path.read_bytes())
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
unittest.main()
|
||||
Reference in New Issue
Block a user