## NPM Proxy Time Machine

A proxy for the NPM registry that hides package versions released after
a specified date.

## Usage

Start the proxy with a specified date.

```bash
./nptm --port=9000 --date=2021-12-05
```

#### Node.js configuration

Switch to a Node.js version for that date.

```bash
nvm install 12
nvm use 12
```

Or if you are using a project-wide `.nvmrc`, just run `nvm use`.

#### Option 1: Global NPM configuration

Check your current registry URL and save it (to restore later).

```bash
npm config get registry
```

Set the proxy as your NPM registry.

```bash
npm config set registry http://localhost:9000/
```

#### Option 2: Local NPM configuration (project-wide)

Create an `.npmrc` file in your project with the proxy URL.

```ini
registry=http://localhost:9000/
```

#### That's it

Now you can run `npm install` for your project. Dependencies will be resolved
as of the specified date.

## Build

You need Go installed to build this project.

```bash
CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o nptm .
```

## License

MIT