Flatten glob "assets" to one output folder

从资产导出配置开始，比较 ng serve、ng build --watch 和常规构建处理所示 glob 的方式。当嵌套资产可以直接输出到 dist/assets 下，无需中间的 module 和 assets 文件夹，同时仍可用于内存中的 serve 工作流时，此更改即完成。

🚀 Feature request

- [ ] new
- [x] build
- [x] serve
- [ ] test
- [ ] e2e
- [ ] generate
- [ ] add
- [ ] update
- [ ] lint
- [ ] xi18n
- [ ] run
- [ ] config
- [ ] help
- [ ] version
- [ ] doc

Description

I am currently working with nested assets folder per entity map. Currently, I am using the following assets export settings:

              {
                "glob": "**/assets/**/*",
                "input": "src/app",
                "output": "/assets",
                "ignore": ["**/*.ts"]
              }

Imagine having the following file structure:

src
├── app
|   ├── module-folder
|   |   ├── assets
|   |   │   ├── images
|   |   │   │   └── image1.png
|   ├──other-module-folder
|   |   ├── assets
|   |   │   ├── images
|   |   │   │   └── image2.png

What I get

This would result in the following dist/ file structure:

dir
├── assets
|   ├── module-folder
|   |   ├── assets
|   |   │   ├── images
|   |   │   │   └── image1.png
|   ├──other-module-folder
|   |   ├── assets
|   |   │   ├── images
|   |   │   │   └── image2.png

What I want to have

dir
├── assets
|   ├── image1.png
|   └── image2.png

What I have tried

I have tried to use a custom script to move the assets files manually in a flatten way to the dir folder.

for file in ./src/app/**/assets/**/*.*; do cp "$file" "./dist/assets/$(basename -- "$file")" ;done

This, however, does not work in combination with ng serve as the files are in-memory, and also does not work with the ng build --watch as I am unsure how to activate script after it has been built.

I would love to get some insight into the best approach. Maybe this is simply using an already existing flow. From my point of view, this should be included as functionality, as the nested folder structure strategy seems to be one of the more common approaches.