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https://github.com/mattbrictson/airbrussh

Airbrussh pretties up your SSHKit and Capistrano output
https://github.com/mattbrictson/airbrussh

capistrano sshkit

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Airbrussh pretties up your SSHKit and Capistrano output

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README 

        
# Airbrussh



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Airbrussh is a concise log formatter for Capistrano and SSHKit. It displays well-formatted, useful log output that is easy to read. Airbrussh also saves Capistrano's verbose output to a separate log file just in case you need additional details for troubleshooting.



**As of April 2016, Airbrussh is bundled with Capistrano 3.5, and is Capistrano's default formatter! There is nothing additional to install or enable.** Continue reading to learn more about Airbrussh's features and configuration options.



If you aren't yet using Capistrano 3.5 (or wish to use Airbrussh with SSHKit directly), refer to the [advanced/legacy usage](#advancedlegacy-usage) section for installation instructions.



![Sample output](https://raw.github.com/mattbrictson/airbrussh/HEAD/demo.gif)



For more details on how exactly Airbrussh affects Capistrano's output and the reasoning behind it, check out the blog post: [Introducing Airbrussh](https://mattbrictson.com/airbrussh).



-----



* [Usage](#usage)

* [Configuration](#configuration)

* [FAQ](#faq)

* [Advanced/legacy usage](#advancedlegacy-usage)



## Usage



Airbrussh is enabled by default in Capistrano 3.5 and newer. To manually enable Airbrussh (for example, when upgrading an existing project), set the Capistrano format like this:



```ruby

# In deploy.rb

set :format, :airbrussh

```



### What's displayed



When you run a Capistrano command, Airbrussh provides the following information in its output:



![Sample output](https://raw.github.com/mattbrictson/airbrussh/HEAD/formatting.png)



* Name of Capistrano task being executed

* When each task started (minutes:seconds elapsed since the deploy began)

* The SSH command-line strings that are executed; for Capistrano tasks that involve running multiple commands, the numeric prefix indicates the command in the sequence, starting from `01`

* Stdout and stderr output from each command

* The duration of each command execution, per server



### What's *not* displayed



For brevity, Airbrussh does not show *everything* that Capistrano is doing. For example, it will omit Capistrano's `test` commands, which can be noisy and confusing. Airbrussh also hides things like environment variables, as well as `cd` and `env` invocations. To see a full audit of Capistrano's execution, including *exactly* what commands were run on each server, look at `log/capistrano.log`.



## Configuration



You can customize many aspects of Airbrussh's output. In Capistrano 3.5 and newer, this is done via the `:format_options` variable, like this:



```ruby

# Pass options to Airbrussh

set :format_options, color: false, truncate: 80

```



Here are the options you can use, and their effects (note that the defaults may be different depending on where Airbrussh is used; these are the defaults used by Capistrano 3.5):



|Option|Default|Usage|

|---|---|---|

|`banner`|`nil`|Provide a string (e.g. "Capistrano started!") that will be printed when Capistrano starts up.|

|`color`|`:auto`|Use `true` or `false` to enable or disable ansi color. If set to `:auto`, Airbrussh automatically uses color based on whether the output is a TTY, or if the SSHKIT_COLOR environment variable is set.|

|`command_output`|`true`|Set to `:stdout`, `:stderr`, or `true` to display the SSH output received via stdout, stderr, or both, respectively. Set to `false` to not show any SSH output, for a minimal look.|

|`context`|`Airbrussh::Rake::Context`|Defines the execution context. Targeted towards uses of Airbrussh outside of Rake/Capistrano. Alternate implementations should provide the definition for `current_task_name`, `register_new_command`, and `position`.|

|`log_file`|`log/capistrano.log`|Capistrano's verbose output is saved to this file to facilitate debugging. Set to `nil` to disable completely.|

|`truncate`|`:auto`|Set to a number (e.g. 80) to truncate the width of the output to that many characters, or `false` to disable truncation. If `:auto`, output is automatically truncated to the width of the terminal window, if it can be determined.|

|`task_prefix`|`nil`|A string to prefix to task output. Handy for output collapsing like [buildkite](https://buildkite.com/docs/builds/managing-log-output)'s `---` prefix|



## FAQ



**Airbrussh is not displaying the output of my commands! For example, I run `tail` in one of my capistrano tasks and airbrussh doesn't show anything. How do I fix this?**



Make sure Airbrussh is configured to show SSH output.



```ruby

set :format_options, command_output: true

```



**I haven't upgraded to Capistrano 3.5 yet. Can I still use Airbrussh?**



Yes! Capistrano 3.4.x is also supported. Refer to the [advanced/legacy usage](#advancedlegacy-usage) section for installation instructions.



**Does Airbrussh work with Capistrano 2?**



No, Capistrano 3 is required. We recommend Capistrano 3.4.0 or higher. Capistrano 3.5.0 and higher have Airbrussh enabled by default, with no installation needed.



**Does Airbrussh work with JRuby?**



JRuby is not officially supported or tested, but may work. You must disable automatic truncation to work around a known bug in the JRuby 9.0 standard library. See [#62](https://github.com/mattbrictson/airbrussh/issues/62) for more details.



```ruby

set :format_options, truncate: false

```



**I have a question that’s not answered here or elsewhere in the README.**



Please [open a GitHub issue](https://github.com/mattbrictson/airbrussh/issues/new) and we’ll be happy to help!



## Advanced/legacy usage



Although Airbrussh is built into Capistrano 3.5.0 and higher, it is also available as a plug-in for older versions. Airbrussh has been tested with MRI 1.9+, Capistrano 3.4.0+, and SSHKit 1.6.1+.



### Capistrano 3.4.x



Add this line to your application's Gemfile:



```ruby

gem "airbrussh", require: false

```



And then execute:



    $ bundle



Finally, add this line to your application's Capfile:



```ruby

require "airbrussh/capistrano"

```



**Important:** explicitly setting Capistrano's `:format` option in your deploy.rb will override airbrussh. Remove this line if you have it:



```ruby

# Remove this

set :format, :pretty

```



Capistrano 3.4.x doesn't have the `:format_options` configuration system, so you will need to configure Airbrussh using this technique:



```ruby

Airbrussh.configure do |config|

  config.color = false

  config.command_output = true

  # etc.

end

```



Refer to the [configuration](#configuration) section above for the list of supported options.



### SSHKit



If you are using SSHKit directly (i.e. without Capistrano), you can use Airbrussh like this:



```ruby

require "airbrussh"

SSHKit.config.output = Airbrussh::Formatter.new($stdout)



# You can also pass configuration options like this

SSHKit.config.output = Airbrussh::Formatter.new($stdout, color: false)

```



## History



Airbrussh started life as custom logging code within the [capistrano-mb][] collection of opinionated Capistrano recipes. In February 2015, the logging code was refactored into a standalone gem with its own configuration and documentation, and renamed `airbrussh`. In February 2016, Airbrussh was added as the default formatter in Capistrano 3.5.0.



## Roadmap



Airbrussh now has a stable feature set, excellent test coverage, is being used for production deployments, and has reached 1.0.0! If you have ideas for improvements to Airbrussh, please open a [GitHub issue](https://github.com/mattbrictson/airbrussh/issues/new).



## Contributing



Contributions are welcome! Read [CONTRIBUTING.md](CONTRIBUTING.md) to get started.



[capistrano-mb]: https://github.com/mattbrictson/capistrano-mb