What:
- `Dirent` class from `NodeJS` has different properties in different versions, causing issues in our loaders.
- Util `readDirRecursive` was introduced, avoiding old node versions to break
FIXES: https://github.com/medusajs/medusa/issues/8419
Fixes: FRMW-2742
In this PR, we fix the build output of the backend source code, which eliminates a lot of magic between the development and production environments.
Right now, we only compile the source files from the `src` directory and write them within the `dist` directory.
**Here's how the `src` directory with a custom module looks like**
```
src
├── modules
│ └── hello
│ ├── index.ts
```
**Here's the build output**
```
dist
├── modules
│ └── hello
│ ├── index.js
```
Let's imagine a file at the root of your project (maybe the `medusa-config.js` file) that wants to import the `modules/hello/index` file. How can we ensure that the import will work in both the development and production environments?
If we write the import targeting the `src` directory, it will break in production because it should target the `dist` directory.
## Solution
The solution is to compile everything within the project and mimic the file structure in the build output, not just the `src` directory.
**Here's how the fixed output should look like**
```
dist
├── src
│ ├── modules
│ │ └── hello
│ │ ├── index.js
├── medusa-config.js
├── yarn.lock
├── package.json
```
If you notice carefully, we also have `medusa-config.js`, `yarn.lock`, and `package.json` within the `dist` directory. We do so to create a standalone built application, something you can copy/paste to your server and run without relying on the original source code.
- This results in small containers since you are not copying unnecessary files.
- Clear distinction between the development and the production code. If you want to run the production server, then `cd` into the `dist` directory and run it from there.
## Changes in the PR
- Breaking: Remove the `dist` and `build` folders. Instead, write them production artefacts within the `.medusa` directory as `.medusa/admin` and `.medusa/server`.
- Breaking: Change the output of the `.medusa/server` folder to mimic the root project structure.
- Refactor: Remove `Symbol.for("ts-node.register.instance")]` check to find from where to load the source code.
- Refactor: Use `tsc` for creating the production build. This ensures we respect `tsconfig` settings when creating the build and also perform type-checking.
Co-authored-by: Adrien de Peretti <25098370+adrien2p@users.noreply.github.com>
FIXES: FRMW-2727
MikroORM (with version 5.9) has [hardcoded the TypeScript module](https://github.com/mikro-orm/mikro-orm/blob/5.x/packages/core/src/utils/ConfigurationLoader.ts#L138-L139) system to `commonjs`, which makes it incompatible with the module system we are using, ie `Node16`.
So, in order to continue using the Mikro ORM CLI within our modules, we will have to monkey-patch the block of code responsible for configuring `ts-node`. However, the monkey-patching must be done before their CLI gets booted.
As a result of this, we have to create a wrapper CLI on top of Mikro ORM CLI that performs the following steps.
- Monkey-patch the relevant code
- Register Mikro ORM CLI as the second step.
Due do this, we will have to use this new wrapper CLI within the modules, which is exposed as `medusa-db`. Maybe, `medusa-db` is not a great name, so please send your suggestions.
