// P4:`data.js` 瘦身 —— 分步降低运行时对源码全文的依赖
//
// 背景(实测):
// data.json 991KB,其中 components[].sources 占 888KB(89.6%)
// 各端源码量:html 245KB / vue2 184KB / vue3 181KB / jsx 155KB / css 119KB
//
// 哪些 sources 被【渲染期同步】消费(改造难点):
// extractComponentAPI → vue3 / vue2 / jsx(3 端)
// extractScenarios → html(1 端)
// css → 不参与任何解析(可安全分离)
//
// 策略:
// 阶段 A —— 预计算 scenarios,验证「构建期预计算 + 运行时回退」链路可行
// 阶段 B —— 分离 css 到独立文件(零风险,不参与解析)
// 阶段 C —— 预计算 API 表(props/emits/slots),再分离 html/jsx/vue2/vue3
//
// 设计原则:运行时保留回退路径,预计算缺失时功能不受影响。
import { fileURLToPath } from 'url';
import {
readFileSync,
writeFileSync,
existsSync,
mkdirSync,
readdirSync,
unlinkSync,
statSync,
} from 'fs';
import path from 'path';
/* defineEmits 数组字面量的安全解析(与 site/app.js 内联实现同源,见模块头注释)。
构建期绝不对 frameworks/ 里的内容做动态求值 —— 旧实现把数组字面量交给函数构造器求值,
投毒的 .vue 因此可在构建机上执行任意 JS。 */
import { parseStringLiteralArray } from './lib/parse-string-literal-array.mjs';
const ROOT = path.resolve(path.join(path.dirname(fileURLToPath(import.meta.url)), '..'));
const DATA_JSON = path.join(ROOT, 'site', 'data.json');
const DATA_JS = path.join(ROOT, 'site', 'data.js');
const SRC_DIR = path.join(ROOT, 'site', 'sources');
const COMPONENT_COUNT = 79;
const SOURCE_FILE_COUNT = 395;
if (!existsSync(DATA_JSON)) {
console.error('[FATAL] 找不到 site/data.json,请先运行 build-site.ps1');
process.exit(1);
}
const data = JSON.parse(readFileSync(DATA_JSON, 'utf8'));
const beforeKb = Math.round(statSync(DATA_JSON).size / 1024);
const SOURCE_KINDS = ['html', 'css', 'jsx', 'vue2', 'vue3'];
const expectedSourcePaths = [];
if (!data || !Array.isArray(data.components) || data.components.length !== COMPONENT_COUNT) {
const actualCount = data && Array.isArray(data.components) ? data.components.length : 0;
console.error(`[FATAL] 组件完整性校验失败:期望 ${COMPONENT_COUNT} 个组件,实际 ${actualCount} 个`);
process.exit(1);
}
for (const c of data.components) {
if (!c || typeof c.slug !== 'string' || !/^[a-z0-9]+(?:-[a-z0-9]+)*$/.test(c.slug)) {
console.error(`[FATAL] 组件完整性校验失败:非法 slug ${String(c && c.slug)}`);
process.exit(1);
}
for (const kind of SOURCE_KINDS) {
if (!c.sources || typeof c.sources[kind] !== 'string') {
console.error(`[FATAL] 源码完整性校验失败:${c.slug} 缺少 ${kind} 源码`);
process.exit(1);
}
expectedSourcePaths.push(path.join(SRC_DIR, c.slug, `${kind}.txt`));
}
}
if (expectedSourcePaths.length !== SOURCE_FILE_COUNT) {
console.error(`[FATAL] 源文件完整性校验失败:期望 ${SOURCE_FILE_COUNT} 个,实际 ${expectedSourcePaths.length} 个`);
process.exit(1);
}
/* 与 app.js 的 extractScenarios 完全一致(保证结果可复现) */
function extractScenarios(c) {
const html = (c.sources && c.sources.html) || '';
const bodyM = html.match(/
]*>([\s\S]*)<\/body>/i);
const body = bodyM ? bodyM[1] : html;
const out = [];
const re = /]*>([\s\S]*?)<\/h2>/gi;
let m;
while ((m = re.exec(body)) !== null) {
let text = m[1].replace(/<[^>]+>/g, '').replace(/\s+/g, ' ').trim();
text = text.replace(/^\d+[.、]\s*/, '');
if (text) out.push(text);
}
return out;
}
/* ---------- 阶段 A:预计算 scenarios ---------- */
let withScenarios = 0;
let totalScenarios = 0;
for (const c of data.components) {
const s = extractScenarios(c);
c.scenarios = s;
totalScenarios += s.length;
if (s.length >= 2) withScenarios++; // app.js 的 buildScenarioCard 要求 >= 2
}
console.log(`[precompute] 阶段A · scenarios:${totalScenarios} 条 / ${withScenarios} 个组件有 ≥2 条`);
/* ---------- 与 app.js 的 extractComponentAPI 逐行一致 ----------
唯一差别:desc 存中文源串(不调 T),运行时由 app.js 包 T() 做中英映射。
这样中文模式输出与今天逐字节一致,英文模式仍能查字典翻译。
slots 额外存 custom 标记:自定义插槽的 desc 需按 name + 后缀动态拼接,
不能存拼接后的整串(否则英文模式查不到字典)。 */
function scanObjectAt(src, openIdx) {
let depth = 0, inStr = null, escCh = false, end = -1;
for (let i = openIdx; i < src.length; i++) {
const ch = src.charAt(i);
if (inStr) {
if (escCh) { escCh = false; continue; }
if (ch === '\\') { escCh = true; continue; }
if (ch === inStr) inStr = null;
continue;
}
if (ch === '"' || ch === "'" || ch === '`') { inStr = ch; continue; }
if (ch === '{') depth++;
else if (ch === '}') { depth--; if (depth === 0) { end = i; break; } }
}
return end < 0 ? null : src.slice(openIdx, end + 1);
}
function stripOuterBraces(s) { return s.replace(/^\s*\{/, '').replace(/\}\s*$/, ''); }
function splitTopLevel(body) {
const segs = [];
let cur = '', depth = 0, inStr = null, escCh = false;
for (let i = 0; i < body.length; i++) {
const ch = body.charAt(i);
if (inStr) {
cur += ch;
if (escCh) { escCh = false; continue; }
if (ch === '\\') { escCh = true; continue; }
if (ch === inStr) inStr = null;
continue;
}
if (ch === '"' || ch === "'" || ch === '`') { inStr = ch; cur += ch; continue; }
if (ch === '{' || ch === '[' || ch === '(') { depth++; cur += ch; continue; }
if (ch === '}' || ch === ']' || ch === ')') { depth--; cur += ch; continue; }
if (ch === ',' && depth === 0) { segs.push(cur); cur = ''; continue; }
cur += ch;
}
if (cur.trim()) segs.push(cur);
return segs;
}
function scanTopLevelValue(str) {
let depth = 0, inStr = null, escCh = false;
for (let i = 0; i < str.length; i++) {
const ch = str.charAt(i);
if (inStr) {
if (escCh) { escCh = false; continue; }
if (ch === '\\') { escCh = true; continue; }
if (ch === inStr) inStr = null;
continue;
}
if (ch === '"' || ch === "'" || ch === '`') { inStr = ch; continue; }
if (ch === '{' || ch === '[' || ch === '(') depth++;
else if (ch === '}' || ch === ']' || ch === ')') { if (depth === 0) return str.slice(0, i); depth--; }
else if (ch === ',' && depth === 0) return str.slice(0, i);
}
return str;
}
function finalizeProp(p) {
let type = 'any';
let def = '—';
let req = false;
const typeM = p.raw.match(/type\s*:\s*(\[[^\]]+\]|[a-zA-Z0-9_$]+)/);
if (typeM) type = typeM[1].replace(/\[|\]/g, '').replace(/,\s*/g, ' | ');
const defM = /default\s*:/.exec(p.raw);
if (defM) {
let val = scanTopLevelValue(p.raw.slice(defM.index + defM[0].length)).trim();
def = val.replace(/\(\)\s*=>\s*/, '') || '—';
if (def === '()') def = '—';
def = def.replace(/\s*\n\s*/g, ' ').replace(/\s{2,}/g, ' ');
if (def.length > 48) def = def.slice(0, 45) + '…';
}
if (/required\s*:\s*true/.test(p.raw)) req = true;
return { name: p.name, type, def, req, desc: p.comment || '—' };
}
function extractComponentAPI(c) {
const v3 = (c.sources && c.sources.vue3) || '';
const v2 = (c.sources && c.sources.vue2) || '';
const jsx = (c.sources && c.sources.jsx) || '';
const code = v3 || v2;
const props = [];
const emits = [];
const slots = [];
let propsBody = null;
const dpM = /defineProps\s*\(/.exec(code);
if (dpM) {
const openIdx = code.indexOf('{', dpM.index);
if (openIdx >= 0) propsBody = stripOuterBraces(scanObjectAt(code, openIdx) || '');
}
if (!propsBody) {
const prM = /props\s*:\s*\{/.exec(code);
if (prM) {
const openIdx2 = prM.index + prM[0].length - 1;
propsBody = stripOuterBraces(scanObjectAt(code, openIdx2) || '');
}
}
if (propsBody && propsBody.trim()) {
splitTopLevel(propsBody).forEach((seg) => {
const m = seg.match(/^\s*([a-zA-Z0-9_$]+)\s*:\s*([\s\S]*)$/);
if (!m) return;
const cM = m[2].match(/\/\/\s*([^\n]+)\s*$/);
props.push(finalizeProp({ name: m[1], comment: cM ? cM[1].trim() : '', raw: m[2] }));
});
} else if (jsx) {
const fnM = jsx.match(/export default function\s+[A-Za-z0-9_$]+\s*\(\s*\{([^}]+)\}/);
if (fnM) {
fnM[1].split(',').forEach((param) => {
const p = param.trim();
if (!p || p.indexOf('...') === 0) return;
const parts = p.split('=');
const name = parts[0].trim();
const def = parts[1] ? parts[1].trim() : '—';
if (name.indexOf('on') === 0 && /[A-Z]/.test(name.charAt(2))) {
emits.push({ name, descZh: '回调触发事件 (Event callback)', params: '(event: any) => void' });
} else if (name === 'children') {
slots.push({ name: 'default', descZh: '子节点内容 (children)', custom: false });
} else {
props.push({ name, type: 'any', def, req: false, desc: '—' });
}
});
}
}
/* 只用 parseStringLiteralArray 解析字符串字面量数组,绝不求值。
旧实现把数组字面量交给函数构造器求值,投毒的 .vue 会在构建期执行任意 JS(已实测)。 */
const mEmits = code.match(/defineEmits\s*\(\s*(\[[^\]]+\])\s*\)/);
const emitArr = mEmits ? parseStringLiteralArray(mEmits[1]) : null;
if (emitArr) {
emitArr.forEach((e) => {
const descZh = e.indexOf('update:') === 0 ? '双向绑定更新事件 (v-model)' : '组件交互触发事件';
if (!emits.some((x) => x.name === e)) {
emits.push({ name: e, descZh, params: '(val: any) => void' });
}
});
}
const emitRegex = /\$emit\(\s*['"]([a-zA-Z0-9_:-]+)['"]/g;
let eMatch;
while ((eMatch = emitRegex.exec(code)) !== null) {
const eName = eMatch[1];
if (!emits.some((x) => x.name === eName)) {
emits.push({ name: eName, descZh: '交互回调触发事件', params: '—' });
}
}
const slotRegex = / x.name === sName)) {
slots.push(sName === 'default'
? { name: sName, descZh: '默认插槽(组件文本或主体内容)', custom: false }
: { name: sName, descZh: '', custom: true });
}
}
return { props, emits, slots };
}
/* ---------- 阶段 C:预计算 API 表 ---------- */
let apiProps = 0, apiEmits = 0, apiSlots = 0, apiComps = 0;
for (const c of data.components) {
const api = extractComponentAPI(c);
c.api = api;
apiProps += api.props.length;
apiEmits += api.emits.length;
apiSlots += api.slots.length;
if (api.props.length || api.emits.length || api.slots.length) apiComps++;
}
console.log(`[precompute] 阶段C · api:${apiComps} 个组件有 API 表(props ${apiProps} / emits ${apiEmits} / slots ${apiSlots})`);
/* ---------- 阶段 B:分离 css 源码到独立文件 ----------
css 不参与任何解析(extractComponentAPI 只读 vue3/vue2/jsx,extractScenarios 只读 html),
因此可安全移出 data.js,改为按需 fetch。
data.json 保持完整(For Agents 承诺不变)。 */
if (!existsSync(SRC_DIR)) mkdirSync(SRC_DIR, { recursive: true });
/* ---------- 阶段 C-2:分离 html/jsx/vue2/vue3 ----------
渲染期同步消费已全部被预计算替代:
- extractComponentAPI → c.api(本文件阶段 C)
- extractScenarios → c.scenarios(阶段 A)
剩余消费全是异步安全(代码展示/srcOf、Playground),由 app.js 按需 fetch。 */
const SPLIT_KINDS = ['html', 'jsx', 'vue2', 'vue3'];
let splitFiles = 0;
for (const c of data.components) {
if (!c.sources) continue;
for (const kind of SPLIT_KINDS) {
if (!c.sources[kind]) continue;
const dir = path.join(SRC_DIR, c.slug);
if (!existsSync(dir)) mkdirSync(dir, { recursive: true });
writeFileSync(path.join(dir, `${kind}.txt`), c.sources[kind]);
splitFiles++;
}
}
console.log(`[precompute] 阶段C-2 · 源码已分离:${splitFiles} 个文件 → site/sources//{html,jsx,vue2,vue3}.txt`);
/* css 分离(阶段 B 保留) */
let cssSplit = 0;
for (const c of data.components) {
if (!c.sources || !c.sources.css) continue;
const dir = path.join(SRC_DIR, c.slug);
if (!existsSync(dir)) mkdirSync(dir, { recursive: true });
writeFileSync(path.join(dir, 'css.txt'), c.sources.css);
cssSplit++;
}
console.log(`[precompute] 阶段B · css 已分离:${cssSplit} 个文件 → site/sources//css.txt`);
const missingOutputSources = expectedSourcePaths.filter((filePath) => !existsSync(filePath));
if (splitFiles + cssSplit !== SOURCE_FILE_COUNT || missingOutputSources.length > 0) {
console.error(`[FATAL] 源文件输出完整性校验失败:期望 ${SOURCE_FILE_COUNT} 个,生成 ${splitFiles + cssSplit} 个,缺失 ${missingOutputSources.length} 个`);
process.exit(1);
}
console.log(`[precompute] 完整性校验:${data.components.length}/${COMPONENT_COUNT} 个组件,${splitFiles + cssSplit}/${SOURCE_FILE_COUNT} 个源文件`);
/* 在 data.js 里把全部 5 端换成引用(data.json 保持完整) */
const dataForJs = JSON.parse(JSON.stringify(data));
for (const c of dataForJs.components) {
if (!c.sources) continue;
for (const kind of ['html', 'css', 'jsx', 'vue2', 'vue3']) {
if (c.sources[kind] != null) {
c.sourcesRef = c.sourcesRef || {};
c.sourcesRef[kind] = `sources/${c.slug}/${kind}.txt`;
delete c.sources[kind];
}
}
}
/* ---------- 阶段 D:分离 contract/specLines/changelog ----------
data.js 体积 ord:contract 38KB + changelog 11.6KB + specLines 11KB ≈ 60KB。
外壳只留 hasContract 布尔;详情写 site/details/.json,日志写 site/changelog.json。
data.json 保持全量完整(对外承诺不变)。 */
const DETAILS_DIR = path.join(ROOT, 'site', 'details');
if (!existsSync(DETAILS_DIR)) mkdirSync(DETAILS_DIR, { recursive: true });
let detailFiles = 0;
for (const c of dataForJs.components) {
const detail = {
slug: c.slug,
contract: c.contract ?? null,
specLines: c.specLines ?? [],
/* 族层:该组件属于哪个族、以什么角色参与、被哪些参数值钉成这一成员。
不属任何族时为 null(79 个组件里 35 个是独立组件)。 */
family: c.family ?? null,
familyRole: c.familyRole ?? null,
familyParams: c.familyParams ?? null,
};
writeFileSync(path.join(DETAILS_DIR, `${c.slug}.json`), JSON.stringify(detail) + '\n');
detailFiles++;
c.hasContract = c.contract != null;
delete c.contract;
delete c.specLines;
}
console.log(`[precompute] 阶段D · details:${detailFiles} 个文件 → site/details/.json`);
const changelogData = { changelog: dataForJs.changelog || [] };
writeFileSync(path.join(ROOT, 'site', 'changelog.json'), JSON.stringify(changelogData) + '\n');
delete dataForJs.changelog;
console.log(`[precompute] 阶段D · changelog:${changelogData.changelog.length} 条 → site/changelog.json`);
/* 清理 details 下的孤儿文件(slug 已不存在时删除) */
const validSlugs = new Set(dataForJs.components.map((c) => c.slug));
let orphans = 0;
for (const f of readdirSync(DETAILS_DIR)) {
if (!f.endsWith('.json')) continue;
if (!validSlugs.has(f.slice(0, -5))) { unlinkSync(`${DETAILS_DIR}/${f}`); orphans++; }
}
if (orphans) console.log(`[precompute] 阶段D · 清理孤儿 details:${orphans} 个`);
/* ---------- 写回 ---------- */
writeFileSync(DATA_JSON, JSON.stringify(data, null, 2) + '\n');
const js = '/* AUTO-GENERATED by build-site.ps1 + tools/precompute.mjs - do not edit by hand */\r\nwindow.AA_DATA = ' + JSON.stringify(dataForJs) + ';\r\n';
writeFileSync(DATA_JS, js);
const afterKb = (Buffer.byteLength(js) / 1024).toFixed(0);
console.log(`[precompute] data.js: ${beforeKb} KB → ${afterKb} KB(−${beforeKb - afterKb} KB)`);