rsync-action/README.md

# Rsync action

This action sends the contents of a directory to a remote server using [rsync][rsync].

## Usage

Basic usage:

```yaml
- name: Transfer files
  uses: https://git.pvv.ntnu.no/Projects/rsync-action@v1
  with:
    source: ./path/to/directory/
    target: /path/at/remote/
    username: username
    host: hostname
    ssh-key: ${{ secrets.SSH_KEY }}
```

Advanced usage:

```yaml
- name: Transfer files
  uses: https://git.pvv.ntnu.no/Projects/rsync-action@v1
  with:
    source: ./path/to/directory/
    target: /path/at/remote/
    username: username
    host: hostname
    port: 2222
    ssh-key: ${{ secrets.SSH_KEY }}
    args: -avz --mkpath --exclude 'node_modules' --delete
    known-hosts: "[hostname]:2222 ssh-ed25519 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
```

## Recommended setup on the remote server

To force the action to only write to a specific directory,
and to prevent excessive damage should the SSH key be compromised,
it is recommended to force the command in the `authorized_keys` file.

```shell
command="rrsync -wo /directory/to/write/to",restrict,no-agent-forwarding,no-port-forwarding,no-pty,no-X11-forwarding ssh-ed25519 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
```

The path specified in `target` will now be relative to `/directory/to/write/to`.

[rsync]: https://rsync.samba.org/