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+#!/usr/bin/env node
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+/* C-2 视觉变更验证（旧蓝→品牌橙/信息蓝分流批次专用）
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+ * 用法：node scripts/tmp_c2_verify.js <页面路径> <替换规则.json>
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+ * 替换规则.json 支持两种规则形态（按序施加）：
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+ * 1. 全局规则：["#5B9BD5", "#F97316"] 字面替换；["/^color: #5B9BD5/m", "color: #0EA5E9"] 正则（flags 直通，缺省补 g）
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+ * 2. 块级规则：{"block": ".channel-tip-text", "pairs": [["color: #5B9BD5", "color: #0EA5E9"]]}
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+ * —— 仅在该选择器规则块（至第一个 } 行）内应用 pairs；块内未命中即报错
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+ * 原理：before(HEAD) 与 after(工作区) 分别拼接 uni.scss 编译并归一；
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+ * 对 before 产物按序施加预期替换后，必须与 after 产物逐字节相同
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+ * → 证明除预期颜色替换外零其他变化。
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+ */
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+const { execSync } = require('child_process')
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+const fs = require('fs')
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+const path = require('path')
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+
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+const PAGE = process.argv[2]
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+const SUBST_FILE = process.argv[3]
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+if (!PAGE || !SUBST_FILE) {
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+ console.error('用法: node scripts/tmp_c2_verify.js <页面路径> <替换规则.json>')
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+ process.exit(2)
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+}
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+
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+const ROOT = path.resolve(__dirname, '..')
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+const REPO = path.resolve(ROOT, '..')
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+const REL = path.relative(REPO, path.join(ROOT, PAGE)).split(path.sep).join('/')
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+const TMP = path.join(ROOT, '.tmp_equiv')
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+fs.mkdirSync(TMP, { recursive: true })
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+
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+function extractStyle(src) {
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+ const m = src.match(/^[ \t]*<style[^>]*>[\s\S]*?<\/style>/m)
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+ if (!m) throw new Error('未找到 style 块: ' + PAGE)
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+ return m[0].replace(/^[ \t]*<style[^>]*>/, '').replace(/<\/style>$/, '')
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+}
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+
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+const uniScss = fs.readFileSync(path.join(ROOT, 'uni.scss'), 'utf8')
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+const afterVue = fs.readFileSync(path.join(ROOT, PAGE), 'utf8')
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+const beforeVue = execSync(`git -C "${REPO}" show HEAD:${REL}`, { encoding: 'utf8', maxBuffer: 1e8 })
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+
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+fs.writeFileSync(path.join(TMP, 'after.scss'), uniScss + '\n' + extractStyle(afterVue))
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+fs.writeFileSync(path.join(TMP, 'before.scss'), uniScss + '\n' + extractStyle(beforeVue))
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+
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+const sass = path.join(ROOT, 'node_modules/.bin/sass.cmd')
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+execSync(`"${sass}" --no-source-map "${TMP}/after.scss" "${TMP}/after.out.css"`, { stdio: 'pipe' })
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+execSync(`"${sass}" --no-source-map "${TMP}/before.scss" "${TMP}/before.out.css"`, { stdio: 'pipe' })
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+
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+function norm(s) {
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+ return s
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+ .replace(/rgba\(([^)]+)\)/g, (m, inner) => 'rgba(' + inner.split(',').map((x) => x.trim()).join(',') + ')') // canonical rgba spacing
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+ .replace(/\/\*[\s\S]*?\*\//g, '') // strip block comments
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+ .replace(/#([0-9a-fA-F]{3,8})\b/g, (m) => {
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+ let h = m.slice(1).toUpperCase()
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+ if (h.length === 3) h = h.split('').map((c) => c + c).join('')
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+ return '#' + h
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+ })
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+ .split('\n').map((l) => l.trim()).filter(Boolean).join('\n')
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+}
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+
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+function toRegExp(pat) {
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+ const last = pat.lastIndexOf('/')
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+ const flags = pat.slice(last + 1)
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+ return new RegExp(pat.slice(1, last), flags.includes('g') ? flags : flags + 'g')
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+}
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+
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+function applyBlockRules(text, sel, pairs) {
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+ const lines = text.split('\n')
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+ let idx = -1
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+ for (let i = 0; i < lines.length; i++) {
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+ if (lines[i].trim() === sel + ' {') { idx = i; break }
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+ }
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+ if (idx === -1) throw new Error('块选择器未找到: ' + sel)
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+ let end = -1
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+ for (let j = idx + 1; j < lines.length; j++) {
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+ if (lines[j].trim() === '}') { end = j; break }
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+ }
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+ if (end === -1) throw new Error('块未闭合: ' + sel)
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+ const body = lines.slice(idx + 1, end)
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+ for (const [pat, rep] of pairs) {
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+ const before = body.join('\n')
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+ const after = pat.startsWith('/') && pat.lastIndexOf('/') > 0
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+ ? before.replace(toRegExp(pat), rep)
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+ : before.split(pat).join(rep)
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+ if (after === before) throw new Error('块内替换未生效: ' + sel + ' :: ' + pat)
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+ body.length = 0
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+ body.push(...after.split('\n'))
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+ }
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+ lines.splice(idx + 1, end - idx - 1, ...body)
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+ return lines.join('\n')
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+}
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+
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+const substs = JSON.parse(fs.readFileSync(SUBST_FILE, 'utf8'))
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+let expected = norm(fs.readFileSync(path.join(TMP, 'before.out.css'), 'utf8'))
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+for (const rule of substs) {
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+ if (Array.isArray(rule)) {
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+ const [pat, rep] = rule
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+ expected = pat.startsWith('/') && pat.lastIndexOf('/') > 0
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+ ? expected.replace(toRegExp(pat), rep)
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+ : expected.split(pat).join(rep)
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+ } else if (rule && rule.block && Array.isArray(rule.pairs)) {
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+ expected = applyBlockRules(expected, rule.block, rule.pairs)
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+ } else {
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+ throw new Error('未知规则形态: ' + JSON.stringify(rule))
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+ }
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+}
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+
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+const after = norm(fs.readFileSync(path.join(TMP, 'after.out.css'), 'utf8'))
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+
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+if (expected === after) {
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+ console.log(`C-2 验证 PASS（${PAGE}）：before 施加预期替换后与 after 逐字节相同，仅含预期颜色变更`)
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+} else {
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+ const el = expected.split('\n'), al = after.split('\n')
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+ console.log(`C-2 验证 DIFF（${PAGE}）：expected ${el.length} 行 / after ${al.length} 行`)
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+ let shown = 0
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+ for (let i = 0; i < Math.max(el.length, al.length) && shown < 40; i++) {
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+ if (el[i] !== al[i]) {
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+ console.log(`L${i + 1}\n expected: ${el[i]}\n after: ${al[i]}`)
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+ shown++
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+ }
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+ }
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+ if (shown >= 40) console.log('...（仅显示前 40 处差异）')
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+ process.exit(1)
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+}
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