= Command Reference

Tap comes with two executables: tap (a gateway application) and rap (a shortcut for running tasks).  The syntax for running tasks via 'tap run' and rap is covered in the {Syntax Reference}[link:files/doc/Syntax%20Reference.html]; this reference covers all of the other tap commands.  For help on the command line, type:

  % tap --help

=== configuration

Tap sets up the local execution environment from 'tap.yml', if it exists.  The config file is, as the extension implies, a YAML file and will be automatically created by the root generator.  Naturally, you can create it yourself.  See Tap::Env and Tap::Exe for a list of the available configurations.

In addition, default configurations may be specified in the global configuration file '~/.tap.yml', where '~' is evaluated as Gem.user_home.

== tap console

Console opens an irb session after loading the tap environment.  Console defines variables 'app' and 'env' referencing Tap::App.instance and Tap::Env.instance, for easy access.

  % tap console
  irb(main):001:0> app.log(:hello)
    I[17:18:53]              hello
  => true
  irb(main):002:0>

== tap generate/destroy

Generate and destory launch generator scripts, similar to those in {Rails}[http://www.rubyonrails.org/].  By default Tap provides generators for:

{command}[link:classes/Tap/Generator/Generators/CommandGenerator.html]:: a new command
{config}[link:classes/Tap/Generator/Generators/ConfigGenerator.html]:: a static config file for the specified task
{file_task}[link:classes/Tap/Generator/Generators/FileTaskGenerator.html]:: a file task and test
{generator}[link:classes/Tap/Generator/GeneratorseneratorGenerator.html]:: a new generator
{root}[link:classes/Tap/Generator/Generators/RootGenerator.html]:: the basic directory structure
{task}[link:classes/Tap/Generator/Generators/TaskGenerator.html]:: a task class and test

For example:

  % tap generate root .
  % tap generate task sample_task
  % tap generate config sample_task
  
  % tap destroy config sample_task
  % tap destroy task sample_task
  % tap destroy root .

Each generator works a little differently.  For help:

  % tap generate --help
  % tap generate <generator> --help
  
== tap manifest

Manifest prints a list of all resources (commands, tasks, generators, etc) available to tap.  Environments are listed in the same order as they are searched, and at the end a tree diagram is printed showing how the environments are nested.

  % tap manifest
  --------------------------------------------------------------------------------
  Desktop:           (/Users/username/Desktop)
  --------------------------------------------------------------------------------
  tap:               (/Library/Ruby/Gems/1.8/gems/tap-0.10.8)
    generators
      command        (lib/tap/generator/generators/command/command_generator.rb)
      config         (lib/tap/generator/generators/config/config_generator.rb)
      file_task      (lib/tap/generator/generators/file_task/file_task_generator.rb)
      generator      (lib/tap/generator/generators/generator/generator_generator.rb)
      root           (lib/tap/generator/generators/root/root_generator.rb)
      task           (lib/tap/generator/generators/task/task_generator.rb)
    commands
      console        (cmd/console.rb)
      destroy        (cmd/destroy.rb)
      generate       (cmd/generate.rb)
      manifest       (cmd/manifest.rb)
      run            (cmd/run.rb)
      server         (cmd/server.rb)
    tasks
      dump           (lib/tap/tasks/dump.rb)
      load           (lib/tap/tasks/load.rb)
      rake           (lib/tap/tasks/rake.rb)
  --------------------------------------------------------------------------------

  Desktop
  `- tap

== tap run

Run configures, enqueues, and executes tasks.  Run has a rich syntax allowing the specification of any number of tasks with configurations and inputs, but simplifies under most circumstances.  The run syntax is detailed in the {Syntax Reference}[link:files/doc/Syntax%20Reference.html], but a couple examples illustrate the key points:

  % tap run sample/task 
  % tap run -- sample/task --key=value input_one -- another/task input_two

The second statement specifies two tasks with inputs, and specifies a configuration for sample/task.  As can be seen, run separates tasks using a double-dash, the standard option break.  Options for the run command can be specified before the first break.

  % tap run --debug -- sample/task --key=value

Here run receives the <tt>--debug</tt> option and sample/task receives the <tt>--key=value</tt> option.  Inputs work the same way.  For example:

  % tap run -- sample/task --key=value one -- another/task two three

Specifies the following:

  Sample::Task.new(:key => 'value').enq('one')
  Another::Task.new.enq('two', 'three') 

Any number of tasks, configurations, and inputs may be specified in this way.

--
== tap server

An experimental local server for tap tasks.