User: using node.js simple-git, can I execute a command of git ls-files?
Assistant: Yes, you can use the `simple-git` library in Node.js to execute the `git ls-files` command. `simple-git` provides a simple interface for running Git commands. Below is a basic example of how to use `simple-git` to run `git ls-files`.

First, make sure you have the `simple-git` package installed. You can install it via npm:

```bash
npm install simple-git
```

Here is an example code snippet that demonstrates how to run `git ls-files` using `simple-git`:

```javascript
const simpleGit = require('simple-git');

// Initialize simple-git with a repository path or use process.cwd() for the current directory
const git = simpleGit(); // or simpleGit('/path/to/repo')

git.lsFiles()
  .then(files => {
    console.log('Files in the repository:');
    console.log(files);
  })
  .catch(err => {
    console.error('Error executing git ls-files:', err.message);
  });
```

### Explanation:
1. **Import `simple-git`:** You first require the `simple-git` library.
2. **Initialize `simple-git`:** You can either pass a specific path to the repository or use the current working directory.
3. **Use the `lsFiles` method:** The `lsFiles()` method is in charge of executing the `git ls-files` command.
4. **Handle the Promise:** Since `lsFiles` returns a Promise, you handle the result in the `.then()` method and any potential errors in the `.catch()` method.

### Output
When you run this code, it will print the list of files in the current Git repository.

### Notes
- Ensure that the directory you are executing this code from is a valid Git repository.
- Handle any potential errors appropriately, especially if the script is run from a non-Git directory.
User: simpleGit doesn't include lsFiles function
Assistant: You're correct, `simple-git` does not have a dedicated `lsFiles` method out of the box. However, you can still execute the `git ls-files` command using the `exec` method provided by `simple-git`. Here’s how you can do that:

### Example Code Snippet

```javascript
const simpleGit = require('simple-git');

// Initialize simple-git in the desired repository
const git = simpleGit(); // or simpleGit('/path/to/repo')

git.raw(['ls-files'])
  .then(files => {
    console.log('Files in the repository:');
    // The result is a Buffer, convert it to string and split into lines
    console.log(files.trim().split('\n'));
  })
  .catch(err => {
    console.error('Error executing git ls-files:', err.message);
  });
```

### Explanation:
1. **Initialize `simple-git`:** Start by initializing `simple-git` as before.
2. **Use the `raw` method:** You can call `git.raw(['ls-files'])` to directly execute the `git ls-files` command.
3. **Handling the Output:** The output will be a string of file names, which you can trim and split into an array for easier handling.
4. **Error Handling:** As before, handle errors appropriately.

### Notes
- This method gives you more flexibility as you can directly execute any git command that is supported.
- Make sure that you are in a valid Git repository when you run this code.
  
This should provide you with the filenames as intended.
User: difference between raw method and execute method
Assistant: