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EMLy/README.md

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# EMLy
EMLy is a lightweight, cross-platform EML (Email Message) viewer built with [Wails](https://wails.io/), Go, and Svelte. It allows users to open and view `.eml` files, including support for viewing attachments like images and PDFs.
## Requirements
Before developing or building EMLy, ensure you have the following installed:
* **Go**: Version 1.24 or later (Project uses 1.24.4) - [Download](https://go.dev/dl/)
* **Wails CLI**: Version v2 - [Installation Guide](https://wails.io/docs/gettingstarted/installation)
* **Node.js**: Required for the frontend build tools.
* **Bun**: The project uses `bun` as the frontend package manager. - [Install Bun](https://bun.sh/)
* Install via: `powershell -c "irm bun.sh/install.ps1 | iex"` (Windows) or `curl -fsSL https://bun.sh/install | bash` (macOS/Linux).
## Installation
1. Clone the repository:
```bash
git clone https://github.com/yourusername/EMLy.git
cd EMLy
```
2. Install frontend dependencies:
```bash
cd frontend
bun install
cd ..
```
*Note: The Wails build process is configured to handle `bun install` automatically if you run `wails build`, but running it manually ensures your IDE is happy.*
## Live Development
To run the application in development mode with hot-reload:
```bash
wails dev
```
* This starts the Go backend and a Vite development server for the frontend.
* The application window will open automatically.
* You can also access the frontend in a browser at `http://localhost:34115` to debug with standard browser devtools (though backend calls will still route to the running Go process).
## Building
To build a redistributable, production-ready binary:
```bash
wails build
```
The output binary will be located in the `build/bin` directory.
### Cross-Compilation & Installers
The project contains configuration for building installers:
* **Windows**: NSIS script located in `build/windows/installer/project.nsi`.
* **MacOS**: Bundle configuration in `build/darwin/`.
To build with specific platform targets (if your environment supports it):
```bash
wails build -platform windows/amd64
```
## Testing
### Frontend Tests
Run the Svelte check to ensure type safety and valid Svelte code:
```bash
cd frontend
bun run check
```
### Backend Tests
To run Go unit tests (if any are added to `backend/`) or standard Go tests:
```bash
go test ./...
```