build报错

[torns]

使用midway-init才新建的工程,运行npm run build报错

[czy88840616]

node版本，typscript版本，@types/node 版本是多少

[torns]

node:10.11.0 typescript:3.2.0 @types/node:10.5.5

[czy88840616]

呃。。同样是10.11，也没问题。。

有动 tsconfig.json 过么？

[torns]

没有动 tsconfig.json, 我这边用的是mac系统,是否与系统有关呢

[czy88840616]

我也是mac。。

[ZQun]

是不是tslint.json的原因，以前的项目更新到新版midway，npm run build 也编译不通过，用midway-init 新建项目就可以编译

../node_modules/@types/jasmine/index.d.ts:9:1 - error TS6200: Definitions of the following identifiers conflict with those in another file: describe, fdescribe, xdescribe, it, fit, xit, beforeEach, afterEach, beforeAll, afterAll, expect, clock, CustomEqualityTester, CustomMatcherFactory, DEFAULT_TIMEOUT_INTERVAL

9 declare function describe(description: string, specDefinitions: () => void): void;
  ~~~~~~~

  node_modules/@types/jest/index.d.ts:26:1
    26 declare var beforeAll: jest.Lifecycle;
       ~~~~~~~
    Conflicts are in this file.

../node_modules/@types/jasmine/index.d.ts:74:9 - error TS2375: Duplicate number index signature.

74         [n: number]: T;
           ~~~~~~~~~~~~~~~

../node_modules/@types/jasmine/index.d.ts:129:9 - error TS2374: Duplicate string index signature.

129         [index: string]: CustomMatcherFactory;
            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

../node_modules/@types/jasmine/index.d.ts:134:9 - error TS2687: All declarations of 'message' must have identical modifiers.

134         message?: string;
            ~~~~~~~

../node_modules/@types/jasmine/index.d.ts:134:9 - error TS2717: Subsequent property declarations must have the same type.  Property 'message' must be of type 'string | (() => string)', but here has type 'string'.

134         message?: string;
            ~~~~~~~

node_modules/@types/jest/index.d.ts:26:1 - error TS6200: Definitions of the following identifiers conflict with those in another file: describe, fdescribe, xdescribe, it, fit, xit, beforeEach, afterEach, beforeAll, afterAll, expect, clock, CustomEqualityTester, CustomMatcherFactory, DEFAULT_TIMEOUT_INTERVAL

26 declare var beforeAll: jest.Lifecycle;
   ~~~~~~~

  ../node_modules/@types/jasmine/index.d.ts:9:1
    9 declare function describe(description: string, specDefinitions: () => void): void;
      ~~~~~~~
    Conflicts are in this file.

node_modules/@types/jest/index.d.ts:1218:9 - error TS2687: All declarations of 'message' must have identical modifiers.

1218         message: string | (() => string);
             ~~~~~~~

node_modules/@types/mocha/index.d.ts:2680:13 - error TS2403: Subsequent variable declarations must have the same type.  Variable 'beforeEach' must be of type 'Lifecycle', but here has type 'HookFunction'.

2680 declare var beforeEach: Mocha.HookFunction;
                 ~~~~~~~~~~

node_modules/@types/mocha/index.d.ts:2698:13 - error TS2403: Subsequent variable declarations must have the same type.  Variable 'afterEach' must be of type 'Lifecycle', but here has type 'HookFunction'.

2698 declare var afterEach: Mocha.HookFunction;
                 ~~~~~~~~~

node_modules/@types/mocha/index.d.ts:2714:13 - error TS2403: Subsequent variable declarations must have the same type.  Variable 'describe' must be of type 'Describe', but here has type 'SuiteFunction'.

2714 declare var describe: Mocha.SuiteFunction;
                 ~~~~~~~~

node_modules/@types/mocha/index.d.ts:2735:13 - error TS2403: Subsequent variable declarations must have the same type.  Variable 'xdescribe' must be of type 'Describe', but here has type 'PendingSuiteFunction'.

2735 declare var xdescribe: Mocha.PendingSuiteFunction;
                 ~~~~~~~~~

node_modules/@types/mocha/index.d.ts:2749:13 - error TS2403: Subsequent variable declarations must have the same type.  Variable 'it' must be of type 'It', but here has type 'TestFunction'.

2749 declare var it: Mocha.TestFunction;
                 ~~

node_modules/@types/mocha/index.d.ts:2763:13 - error TS2403: Subsequent variable declarations must have the same type.  Variable 'test' must be of type 'It', but here has type 'TestFunction'.

2763 declare var test: Mocha.TestFunction;
                 ~~~~

node_modules/@types/mocha/index.d.ts:2770:13 - error TS2403: Subsequent variable declarations must have the same type.  Variable 'xit' must be of type 'It', but here has type 'PendingTestFunction'.

2770 declare var xit: Mocha.PendingTestFunction;
                 ~~~


Found 14 errors.

[czy88840616]

他这个也是新建的项目吧。

[ZQun]

嗯嗯，新建项目没有问题，我的项目报错是因为@types/mocha和@types/jest同时安装冲突😭

[atzcl]

@czy88840616 大佬，这个问题怎么解决呢~

[czy88840616]

我本地一直没重现..你那有能重现的demo么……

[atzcl]

@czy88840616 劳烦大佬看看了

第一个 这个是直接 init 创建，然后 yarn 安装依赖，直接 build 的时候会报错，但是在升级了 package.json 里面的依赖后，是可以正常 build 的

第二个 这个是因为在 tsconfig.json 里面定义了 paths 路径别名导致的，已经使用了

// config/plugin.ts

import 'tsconfig-paths/register';

更新：第二个的原因已找到，详情看 这里，原因是因为 tsconfig-paths 不支持 tsconfig.json 里面的数据有尾随逗号

[czy88840616]

第一个已重现，这个有出现过，@Lellansin 有方案修复。加一段 baseUrl 和 Paths

{
  "compileOnSave": true,
  "compilerOptions": {
    "baseUrl" : "./",
    "paths": {
        "*" : ["./node_modules/@types/*", "*"]
    },
    "target": "ES2017",
    "module": "commonjs",
    "moduleResolution": "node",
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "inlineSourceMap":true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "stripInternal": true,
    "pretty": true,
    "declaration": true,
    "outDir": "dist",
    "lib": ["es2017", "dom"]
  },
  "exclude": [
    "dist",
    "node_modules",
    "test"
  ]
}

[Lellansin]

看起来是 tsc 编译的时候没有 ignore 了 exclude 的 node_modules。具体 tsc 的表现可以参见文档 Why is a file in the exclude list still picked up by the compiler?

[atzcl]

@czy88840616 大佬，另外有一个问题，在 build 之后，paths 定义的路径别名没有解析替换掉，还是原样保留，比如定义了 @my_config' 别名并使用, 然后编译出来的是 const my_config_1 = require("@my_config");

[Lellansin]

@czy88840616 大佬，另外有一个问题，在 build 之后，paths 定义的路径别名没有解析替换掉，还是原样保留，比如定义了 @my_config' 别名并使用, 然后编译出来的是 const my_config_1 = require("@my_config");

这些属于 tsc 的编译项的问题，建议找 typescript 的文档

[atzcl]

@Lellansin 查看了 tsconfig-paths/register 的 issue 发现 tsc 不支持相关转换😰😰😰

[atzcl]

想问下为什么 dev 期间使用 ts-node，而 build 却使用 tsc 呢？

[czy88840616]

开发期间，不需要编译，方便开发调试，而上线了就需要build，走编译后的js文件。ts-node 本身性能不是很高，只能用于开发环境。

[atzcl]

@czy88840616 @Lellansin

更新：折腾了下，根据 tsconfig-paths 的文档，单独开了个文件来使用 tsconfig-paths 的 register, 用于别名路径解析，然后

node -r ./tsconfig-paths-bootstrap.js ./node_modules/midway/server.js

因为不知道 egg-scripts 怎么给 node 传递参数，所以改用 pm2 做部署监控了，这个问题 nestjs 也有，解决的方案一样，有些好奇大佬们开发的时候都不使用路径别名的吗？

[czy88840616]

我个人一般不用。。。