fix(cli): install the missing React Native Babel preset by dvd233 · Pull Request #19521 · NervJS/taro

dvd233 · 2026-10-11T15:50:21Z

这个 PR 做了什么？

分离模式首次构建 RN 时，CLI 安装 RN 0.73 相关依赖，却没有声明对应的 Babel preset。@rnx-kit/babel-preset-metro-react-native 因此仍选择旧的 metro-react-native-babel-preset，导致构建报缺包；再次运行又会被四个核心依赖已存在的检查跳过。

本次在默认安装列表补上 @react-native/babel-preset@^0.73.18。对于核心依赖均已声明、RN 声明完全限定在稳定 0.73 范围的项目，只请求安装这个缺失包；保留显式选择的新旧 preset 和其他 RN 版本。安装命令在读取 package.json 的应用目录执行，补装失败时不启动 runner。

验证：

新增 54 项平台注册入口回归；原版 23 项失败，修复后全部通过，覆盖 npm/yarn/pnpm、已有声明、版本范围和失败顺序。
CLI 全套 Jest CI 检查：159 通过、0 失败、7 项原有跳过；CLI 正常 build 与两文件 ESLint 通过。环境为 Windows、Node 20.20.2、pnpm 10.30.3；doctor 使用真实原生包和官方 schema 的本地副本。
在真实本地链接的 React/RN 开发应用中执行 compiled CLI → child_process.exec → pnpm 补装，Babel 从旧 preset 缺包变为成功转换 TSX 和 Taro 组件导入。集成验证停在 Metro runner 加载边界，未执行 Android/iOS 构建或完整默认模板初始化。

这个 PR 是什么类型？

错误修复 (Bugfix) issue: Fixes 分离模式,初始化默认模板,build:rn --platform android 报错 #19486
新功能 (Feature)
代码重构 (Refactor)
TypeScript 类型定义修改 (Types)
文档修改 (Docs)
代码风格更新 (Code style update)
构建优化 (Chore)
其他，请描述 (Other, please describe):

这个 PR 涉及以下平台：

Summary by CodeRabbit

新功能
- React Native 0.73 项目在符合条件时可自动安装 Babel preset；核心依赖不完整时，仍会安装所需依赖。
- 支持 npm、Yarn 和 pnpm，并根据依赖版本及 preset 声明情况选择安装内容。
修复
- 安装命令统一在工作区目录执行；Yarn 仅在核心依赖缺失时使用 --force。
- 安装失败时不启动后续 runner，并记录错误。

coderabbitai · 2026-10-11T15:50:42Z

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Walkthrough

React Native 平台现在检查 React Native 版本范围和 Babel preset 声明，再决定是否安装 preset。安装命令在工作区目录执行。新增测试覆盖安装条件、包管理器行为和失败场景。

Changes

React Native preset 安装

Layer / File(s)	Summary
版本判定与安装逻辑 `packages/taro-cli/src/presets/platforms/rn.ts`	依赖分组缺失时按空对象处理。仅当 React Native 版本范围符合 0.73 条件时，才可能安装 Babel preset。核心依赖齐全时仅安装 preset；核心依赖缺失时安装原有依赖组，并在未声明 preset 时追加 preset。Yarn 仅在核心依赖缺失时添加 `--force`，命令在工作区目录执行。
安装行为测试 `packages/taro-cli/src/__tests__/rn-platform.spec.ts`	新增测试，覆盖 npm、Yarn、pnpm 的安装行为、版本范围、各依赖分组中的 preset 声明、缺失依赖分组，以及安装失败时不运行 runner 并记录错误。

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix · Severity of issue fixed: Medium

Merge Risk: 🔵 Low · up to 39f5c

The change adds the missing Babel preset to default React Native installs and fixes the reported build failure. In rare projects that declare the preset only as a peer or optional dependency, the preset may still be missing, so the build could still fail. This is a small edge case and does not block merging.

Pre-merge checks | 4 | 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 9 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		标题准确概括了本次变更的主要内容，即修复 React Native Babel preset 缺失时的安装逻辑。标题简洁、明确，并与 PR 目标一致。
Linked Issues check		PR 实现了 issue `#19486` 的核心编码要求。`packages/taro-cli/src/presets/platforms/rn.ts` 将 `@react-native/babel-preset@^0.73.18` 加入 RN 默认安装列表。对于核心依赖已声明且 React Native 范围完全位于稳定 `>=0.73.0 <0.74.0` 的项目，代码只安装缺失的 preset…
Out of Scope Changes check		变更集中在 RN 平台依赖安装逻辑及其回归测试。测试覆盖安装命令、工作目录、runner 调用顺序、版本判断和失败处理，均直接支持 issue `#19486` 的修复。未见与该 issue 无关的功能、平台或文档变更。

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Actionable comments posted: 1

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Inline comments:
Review comments at @packages/taro-cli/src/presets/platforms/rn.ts:
- Around line 26-27: 更新 `presetDeclared` 的判断，不要将 `peerDependencies` 或可能未安装的
`optionalDependencies` 声明当作 preset 已可用；改为验证 preset 是否实际可解析。若缺失，则安装用户声明的
preset，或停止启动 runner 并报告错误。

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packages/taro-cli/src/__tests__/rn-platform.spec.ts
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codecov · 2026-10-11T16:08:16Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 55.29%. Comparing base (7219d19) to head (f36cc6e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #19521      +/-   ##
==========================================
+ Coverage   55.16%   55.29%   +0.13%     
==========================================
  Files         466      467       +1     
  Lines       25567    25643      +76     
  Branches     6368     6427      +59     
==========================================
+ Hits        14103    14180      +77     
- Misses       9469     9612     +143     
+ Partials     1995     1851     -144

Flag	Coverage Δ
taro-cli	`60.27% <100.00%> (+3.31%)`	⬆️
taro-runtime	`58.11% <ø> (ø)`
taro-web	`57.39% <ø> (ø)`

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
packages/taro-cli/src/presets/platforms/rn.ts	`100.00% <100.00%> (ø)`

... and 48 files with indirect coverage changes

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coderabbitai Bot reviewed Oct 11, 2026

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Comment thread packages/taro-cli/src/presets/platforms/rn.ts Resolved

fix(cli): install the missing React Native Babel preset

f36cc6e

Single-Dancer force-pushed the codex/fix-rn-babel-preset-install branch from 39f5c74 to f36cc6e Compare October 16, 2026 06:35

Single-Dancer added this to the 4.3.1 milestone Oct 16, 2026

Single-Dancer approved these changes Oct 16, 2026

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Single-Dancer merged commit 5a84b9b into NervJS:main Oct 16, 2026
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Single-Dancer mentioned this pull request Oct 23, 2026

chore(release): publish 4.3.1 #19553

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fix(cli): install the missing React Native Babel preset - #19521

fix(cli): install the missing React Native Babel preset#19521
Single-Dancer merged 1 commit into
NervJS:mainfrom
dvd233:codex/fix-rn-babel-preset-install

dvd233 commented Oct 11, 2026 •

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dvd233 commented Oct 11, 2026 •

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