## vela system live-diff

Dry-run an application, and do diff on a specific app revison

### Synopsis

Dry-run an application, and do diff on a specific app revison. The provided capability definitions will be used during Dry-run. If any capabilities used in the app are not found in the provided ones, it will try to find from cluster.

```
vela system live-diff
```

### Examples

```
vela live-diff -f app-v2.yaml -r app-v1 --context 10
```

### Options

```
  -r, --Revision string     specify an application Revision name, by default, it will compare with the latest Revision
  -c, --context int         output number lines of context around changes, by default show all unchanged lines (default -1)
  -d, --definition string   specify a file or directory containing capability definitions, they will only be used in dry-run rather than applied to K8s cluster
  -f, --file string         application file name (default "./app.yaml")
  -h, --help                help for live-diff
```

### Options inherited from parent commands

```
  -e, --env string   specify environment name for application
```

### SEE ALSO

* [vela system](vela_system.md)	 - System management utilities

###### Auto generated by spf13/cobra on 2-May-2021