`nest build` throws compilation errors about typescript `Omit` type util

[thatkookooguy]

Bug Report

Current behavior

When I run nest build, I get Errors for either incorrect things or things in node_modules

But when I run npm run start:dev, everything works and the application runs

Input Code

Repo: https://github.com/Kibibit/achievibit/tree/next

Notice that the code in question is in the next branch

Reproduce steps:

1. Clone the repo and install dependencies
2. Try to run the application with npm run start:dev
3. Try to build the application with nest build

Some suspects:

• I'm using the paths field in tsconfig.json to create shortcuts for paths in my application might be something with resolving paths in the destination files?
• when running npx tsc --build ./tsconfig.build.json, the build itself passes, but I can't run the application as well.

Here's the output when running nest build:

node_modules/@nestjs/swagger/dist/decorators/api-body.decorator.d.ts:4:35 - error TS2304: Cannot find name 'Omit'.

4 declare type RequestBodyOptions = Omit<RequestBodyObject, 'content'>;
                                    ~~~~
node_modules/@nestjs/swagger/dist/decorators/api-header.decorator.d.ts:3:43 - error TS2304: Cannot find name 'Omit'.

3 export interface ApiHeaderOptions extends Omit<ParameterObject, 'in'> {
                                            ~~~~
node_modules/@nestjs/swagger/dist/decorators/api-param.decorator.d.ts:4:33 - error TS2304: Cannot find name 'Omit'.

4 declare type ParameterOptions = Omit<ParameterObject, 'in' | 'schema'>;
                                  ~~~~
node_modules/@nestjs/swagger/dist/decorators/api-property.decorator.d.ts:2:45 - error TS2304: Cannot find name 'Omit'.

2 export interface ApiPropertyOptions extends Omit<SchemaObjectMetadata, 'name' | 'enum'> {
                                              ~~~~
node_modules/@nestjs/swagger/dist/decorators/api-property.decorator.d.ts:8:80 - error TS2344: Type '"type" | "enum" | "example" | "format" | "deprecated"' does not satisfy the constraint '"name" | "enum"'.
  Type '"type"' is not assignable to type '"name" | "enum"'.

8 export declare function ApiResponseProperty(options?: Pick<ApiPropertyOptions, 'type' | 'example' | 'format' | 'enum' | 'deprecated'>): PropertyDecorator;
                                                                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
node_modules/@nestjs/swagger/dist/decorators/api-query.decorator.d.ts:4:33 - error TS2304: Cannot find name 'Omit'.

4 declare type ParameterOptions = Omit<ParameterObject, 'in' | 'schema'>;
                                  ~~~~
node_modules/@nestjs/swagger/dist/decorators/api-response.decorator.d.ts:3:46 - error TS2304: Cannot find name 'Omit'.

3 export interface ApiResponseMetadata extends Omit<ResponseObject, 'description'> {
                                               ~~~~
node_modules/@nestjs/swagger/dist/decorators/api-response.decorator.d.ts:9:48 - error TS2304: Cannot find name 'Omit'.

9 export interface ApiResponseSchemaHost extends Omit<ResponseObject, 'description'> {
                                                 ~~~~
node_modules/@nestjs/swagger/dist/document-builder.d.ts:20:14 - error TS2304: Cannot find name 'Omit'.

20     build(): Omit<OpenAPIObject, 'components' | 'paths'>;
                ~~~~
node_modules/@nestjs/swagger/dist/interfaces/schema-object-metadata.interface.d.ts:3:47 - error TS2304: Cannot find name 'Omit'.

3 export interface SchemaObjectMetadata extends Omit<SchemaObject, 'type' | 'required'> {
                                                ~~~~
node_modules/@nestjs/swagger/dist/swagger-module.d.ts:4:58 - error TS2304: Cannot find name 'Omit'.

4     static createDocument(app: INestApplication, config: Omit<OpenAPIObject, 'paths'>, options?: SwaggerDocumentOptions): OpenAPIObject;
                                                           ~~~~
src/models/user.model.ts:31:18 - error TS2345: Argument of type '{ required: boolean; }' is not assignable to parameter of type 'ApiPropertyOptions'.
  Object literal may only specify known properties, and 'required' does not exist in type 'ApiPropertyOptions'.

31   @ApiProperty({ required: false })
                    ~~~~~~~~~~~~~~~

Found 12 error(s).

All of them excepts the last one are from node_modules. The last one says that required does not exist in type ApiPropertyOptions, even though it clearly does exist there :-)

When looking at the decorator's declaration files, you can see that ApiPropertyOptions also uses the Omit utility type, so it might be related?

Expected behavior

nest build should build with no false errors

Possible Solution

Possibly a version I need to update or some configuration param that I need to set :-)

Pretty sure it's related to the Omit type which makes me think it's related to the typescript version, but looks like the version is pretty up-to-date (latest = 3.7.3, installed = 3.6.3)

Environment

Nest version:
```
"@nestjs/common": "^6.7.2",
"@nestjs/core": "^6.7.2",
"@nestjs/mongoose": "^6.1.2",
"@nestjs/platform-express": "^6.7.2",
"@nestjs/swagger": "^4.0.9",
```

Nest CLI version: `6.12.7`

For Tooling issues:
- Node version: `v10.15.0`  
- Platform: `MacOS Mojave 10.14.6` 

Others:

[thatkookooguy]

don't know what happened, but it looks fine now

[evrend]

I have same problem when I deploy my app with dokku. These versions are same with my local.

Typescript v3.7.3 Npm v6.12.1 Node v12.13.1

I found a solution but I think it is'nt a good solution. I need a real fix. Open file tsconfig.json and add this line:

{
    compilerOptions: {
        "skipLibCheck": true
    }
}

[kamilmysliwiec]

Updating TypeScript fixes this issue. skipLibCheck: true is fine as well