[BUG] typescript-axios(API Clients) could not build because of --typeRoots option(TypeScriptCompiler) when using yarn workspace

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Bounty to sponsor the fix (example)

Description

The issue is the build failure of API Clients - axios-typescript. The reason why this issue is problem for me is that I cannnot publish api client used in our project.

openapi-generator version

I use the latest version of openapi-generator (becasue it happend soon after I execute yarn add @openapitools/openapi-generator-cli).

OpenAPI declaration file content or url

The issue is not related to api specification.

Command line used for generation

I use npm.

openapi-generator generate --input-spec <specPath> --generator-name typescript-axios --output <dist> --config api.json

Steps to reproduce

• directory structure

.
├─node_modules
├─packages
│  ├─spec
│  │  ├─api.json
│  │  ├─package.json
│  │  └─openapi.yaml
│  └─client
│    └─...autoGeneratedFiles
├─package.json
└─yarn.lock

• ./package.json

{
  "scripts": {
    "generate:client": "yarn workspace <workspaceName-spec> generate:client",
    "client:build": "yarn workspace <workspaceName-client> build"
  },
  "dependencies": {
    "axios": "^0.18.0"
  },
  "devDependencies": {
    "@types/node": "^12.11.5",
    "lerna": "^3.22.1",
    "typescript": "^3.6.4"
  },
  "workspaces": {
    "packages": {
      "packages/*"
    }
  }
}

• ./packages/docs/package.json

{
  "scripts": {
    "generate:client": "openapi-generator generate --input-spec ./openapi.yaml --generator-name typescript-axios ../client --config api.json"
  },
  "devDependencies": {
    "@openapitools/openapi-generator-cli": "^1.0.15-4.3.1"
  }
}

Execute yarn client:build and you can see errors below.

yarn run v1.22.4
$ yarn workspace <workspaceName> build
$ tsc --outDir dist/
api.ts:15:34 - error TS2307: Cannot find module 'url' or its corresponding type declarations.
15 import * as globalImportUrl from 'url';
                                    ~~~~~
Found 1 error.
error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed.
Exit code: 2
Command: /Users/<Username>/.nodenv/versions/12.16.2/bin/node
Arguments: /Users/<Username>/Applications/homebrew/Cellar/yarn/1.22.4/libexec/lib/cli.js build
Directory: <ProjectPath>/packages/client
Output:
info Visit https://yarnpkg.com/en/docs/cli/workspace for documentation about this command.
error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Related issues/PRs

In order to resolve #2394, --typeRoots was introduced.

Suggest a fix

I manually changed the generated tsconfig.json and then build succeeded.

diff is here

-    ],
-    "typeRoots": [
-      "node_modules/@types"
-    ]
+    ]

https://github.com/OpenAPITools/openapi-generator/blob/28ddad44e57109989b6fd17fffe0fa2403046102/modules/openapi-generator/src/main/resources/typescript-axios/tsconfig.mustache#L15-L17

or how about introducing options that disables the --typeRoots or enables the --typeRoots?

Start with modules/openapi-generator/src/main/resources/typescript-axios/tsconfig.mustache, especially the linked typeRoots section, and reproduce the failure with the provided yarn workspace layout and client:build command. Compare the generated tsconfig.json with the issue's manual diff and verify that the generated client builds successfully without that manual change.