92 lines
2.8 KiB
JavaScript
92 lines
2.8 KiB
JavaScript
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'use strict';
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/**
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* fast-cache.js — 启动期热数据快路径缓存 (P1-FAST-CACHE-V1)
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*
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* 通过 mtime 签名: 所有源文件未变 → 直接返回上次缓存。
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* 仅缓存只读字段子集，避免缓存整个大 JSON 文件。
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*
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* 借鉴: OpenClaw entry.version-fast-path.ts (零模块加载快退出)
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*
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* Usage:
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* const { readFastCache } = require('./lib/fast-cache.js');
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* const cache = readFastCache() || {};
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* const skillCount = cache.skillCount || 0;
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*/
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const fs = require('fs');
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const path = require('path');
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const ROOT = path.join(__dirname, '..', '..');
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const CACHE_FILE = path.join(ROOT, 'debug', '.hook-fast-cache.json');
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const SOURCES = [
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{ file: path.join(ROOT, 'stats-compiled.json'), fields: ['summary', 'version'] },
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// settings.json 不再读取 mcpServers (MCP 配置在 ~/.claude.json，由 stats 编译)
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];
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function readFastCache() {
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try {
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const mtimes = SOURCES.map(function(s) {
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try { return fs.statSync(s.file).mtimeMs; } catch (_) { return 0; }
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});
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const sig = mtimes.join(':');
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if (fs.existsSync(CACHE_FILE)) {
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try {
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const cache = JSON.parse(fs.readFileSync(CACHE_FILE, 'utf8'));
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if (cache && cache._sig === sig) return cache;
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} catch (_) { /* malformed cache, rebuild */ }
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}
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const rebuilt = { _sig: sig, _builtAt: Date.now() };
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for (let i = 0; i < SOURCES.length; i++) {
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const { file, fields } = SOURCES[i];
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try {
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const data = JSON.parse(fs.readFileSync(file, 'utf8'));
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for (let j = 0; j < fields.length; j++) {
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rebuilt[fields[j]] = data[fields[j]];
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}
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} catch (_) { /* missing file ok */ }
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}
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// P1-FAST-CACHE-V1-FIELDS-FIX: stats.summary 字段名修正
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const _sum = rebuilt.summary || {};
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rebuilt.skillCount = _sum.skills || 0;
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rebuilt.hookCount = _sum.hooks || 0; // 总数
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rebuilt.hookRegisteredCount = _sum.hooksRegistered || 0;
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rebuilt.agentCount = _sum.agents || 0;
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rebuilt.mcpCount = _sum.mcpTotal || _sum.mcp || 0;
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// 异步写回 (不阻塞主流程)
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setImmediate(function() {
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try {
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const cacheDir = path.dirname(CACHE_FILE);
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if (!fs.existsSync(cacheDir)) fs.mkdirSync(cacheDir, { recursive: true });
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const tmp = CACHE_FILE + '.tmp.' + process.pid;
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fs.writeFileSync(tmp, JSON.stringify(rebuilt));
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fs.renameSync(tmp, CACHE_FILE);
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} catch (_) { /* best effort */ }
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});
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return rebuilt;
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} catch (_) {
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return null;
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}
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}
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function enableCompileCacheBestEffort() {
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try {
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const mod = require('node:module');
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if (mod.enableCompileCache && !process.env.NODE_DISABLE_COMPILE_CACHE) {
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mod.enableCompileCache();
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return true;
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}
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} catch (_) { /* unsupported */ }
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return false;
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}
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module.exports = {
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readFastCache,
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enableCompileCacheBestEffort,
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__sentinel: 'P1-FAST-CACHE-V1',
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};
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